{"id":2099,"date":"2025-10-24T17:36:59","date_gmt":"2025-10-24T17:36:59","guid":{"rendered":"https:\/\/sinobreaker.com\/dc-current-circuit-breaker-sizing-load-matching\/"},"modified":"2025-10-24T17:50:01","modified_gmt":"2025-10-24T17:50:01","slug":"dc-current-circuit-breaker-sizing-load-matching","status":"publish","type":"post","link":"https:\/\/sinobreaker.com\/ja\/dc-current-circuit-breaker-sizing-load-matching\/","title":{"rendered":"\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u30b5\u30a4\u30b8\u30f3\u30b0NEC 690.8\u306e\u8a08\u7b97"},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n

\u6b63\u3057\u3044\u9078\u629e \u76f4\u6d41\u96fb\u6d41\u906e\u65ad\u5668<\/strong> \u5b9a\u683c\u96fb\u6d41\u306f\u6b63\u78ba\u306a\u5de5\u5b66\u8a08\u7b97\u3067\u3059\u3002\u5c0f\u3055\u3059\u304e\u308b\u3068\u8ff7\u60d1\u306a\u30c8\u30ea\u30c3\u30d7\u304c\u4f5c\u52d5\u3057\u3001\u5927\u304d\u3059\u304e\u308b\u3068\u4fdd\u8b77\u304c\u4f5c\u52d5\u3059\u308b\u524d\u306b\u30ef\u30a4\u30e4\u30fc\u304c\u904e\u71b1\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30ba\u304c\u5b89\u5168\u30de\u30fc\u30b8\u30f3\u3092\u63d0\u4f9b\u3059\u308b\u96fb\u5727\u5b9a\u683c\u3068\u306f\u7570\u306a\u308a\u3001\u96fb\u6d41\u5b9a\u683c\u306f\u7279\u5b9a\u306e\u8ca0\u8377\u3068\u30ef\u30a4\u30e4\u5bb9\u91cf\u306b\u53b3\u3057\u3044\u8a31\u5bb9\u7bc4\u56f2\u5185\u3067\u9069\u5408\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n

\u3053\u306e\u30b5\u30a4\u30b8\u30f3\u30b0\u306b\u7279\u5316\u3057\u305f\u30ac\u30a4\u30c9\u306f\u3001\u96fb\u6c17\u8a2d\u8a08\u8005\u3068\u30b7\u30b9\u30c6\u30e0\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u9078\u5b9a\u306e\u305f\u3081\u306e\u5305\u62ec\u7684\u306a\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002NEC690\u6761\u306e\u592a\u967d\u71b1\u8a08\u7b97\u3001\u9023\u7d9a\u8ca0\u8377\u8efd\u6e1b\u4fc2\u6570\u3001\u96fb\u7dda\u8010\u529b\u306e\u691c\u8a3c\u3001\u8ca0\u8377\u30bf\u30a4\u30d7\u306e\u8003\u616e\u3001\u904e\u8ca0\u8377\u3068\u77ed\u7d61\u4fdd\u8b77\u8981\u4ef6\u306e\u91cd\u8981\u306a\u533a\u5225\u3092\u30ab\u30d0\u30fc\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n

\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u3001\u84c4\u96fb\u6c60\u3001\u76f4\u6d41\u30de\u30a4\u30af\u30ed\u30b0\u30ea\u30c3\u30c9\u3001\u307e\u305f\u306f\u7523\u696d\u7528\u76f4\u6d41\u914d\u96fb\u3092\u8a2d\u8a08\u3059\u308b\u5c02\u9580\u5bb6\u306b\u3068\u3063\u3066\u3001\u9069\u5207\u306a\u5b9a\u683c\u96fb\u6d41\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u306f\u3001\u8aa4\u52d5\u4f5c\u3059\u308b\u3053\u3068\u306a\u304f\u6a5f\u5668\u3092\u4fdd\u8b77\u3059\u308b\u3001\u5b89\u5168\u3067\u6cd5\u4ee4\u306b\u6e96\u62e0\u3057\u305f\u8a2d\u7f6e\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n

\n

\ud83d\udca1 \u30b5\u30a4\u30ba\u306e\u512a\u5148\u9806\u4f4d<\/strong>:\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306f\u3001\u8ca0\u8377\u3067\u306f\u306a\u304f\u96fb\u7dda\u3092\u4fdd\u8b77\u3057\u307e\u3059\u3002\u96fb\u7dda\u306e\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\uff08\u6e29\u5ea6\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u5f8c\uff09\u304c\u30d6\u30ec\u30fc\u30ab\u306e\u6700\u5927\u8a31\u5bb9\u5b9a\u683c\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002.<\/p>\n<\/blockquote>\n\n\n\n

NEC \u7b2c690.8\u6761 \u592a\u967d\u96fb\u6c60\u904e\u96fb\u6d41\u4fdd\u8b77<\/h2>\n\n\n\n

1.56\u500d\u306b\u3064\u3044\u3066<\/h3>\n\n\n\n

NEC 690.8(A)(1)\u306f\u3001\u5b9a\u683c\u306e\u592a\u967d\u5149\u767a\u96fb\u30b9\u30c8\u30ea\u30f3\u30b0\u904e\u96fb\u6d41\u88c5\u7f6e\u3092\u8981\u6c42\u3057\u3066\u3044\u308b\uff1a<\/p>\n\n\n\n

I_ocpd \u2265 I_sc \u00d7 1.56<\/strong><\/p>\n\n\n\n

\u3053\u306e1.56\u500d\u306f\u30012\u3064\u306e\u9023\u7d9a\u3057\u305f125%\u4e57\u7b97\u5668\u3092\u8868\u3057\u3066\u3044\u308b\uff1a<\/p>\n\n\n\n

\u6700\u521d\u306e125% - \u9ad8\u7167\u5ea6\u6761\u4ef6<\/strong>:
- \u65e5\u5c04\u91cf\u306f\u6a19\u6e96\u8a66\u9a13\u6761\u4ef6\uff08STC\uff1a1000W\/m\u00b2\uff09\u3092\u8d85\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002
- \u96f2\u7aef\u52b9\u679c\u3001\u5730\u9762\u53cd\u5c04\u3001\u96ea\u53cd\u5c04\u306b\u3088\u308a\u3001\u65e5\u5c04\u91cf\u306f1250W\/m\u00b2\u306b\u5897\u52a0\u3059\u308b\u3002
- \u30e2\u30b8\u30e5\u30fc\u30ebI_sc\u306f\u6bd4\u4f8b\u3057\u3066\u5897\u52a0\u3059\u308b\uff1aI_sc_actual = I_sc_STC \u00d7 1.25<\/p>\n\n\n\n

\u7b2c 2 125% - \u9023\u7d9a\u52d5\u4f5c\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>:
- NEC 210.20(A)\u3067\u306f\u3001\u9023\u7d9a\u8ca0\u8377(>3 \u6642\u9593)\u3092\u30d6\u30ec\u30fc\u30ab\u5b9a\u683c\u306e 80% \u306b\u8efd\u6e1b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
- \u53cd\u8ee2\uff1a\u30d6\u30ec\u30fc\u30ab\u306e\u5b9a\u683c\u306f\u9023\u7d9a\u8ca0\u8377125%\u3067\u3042\u308b\u3053\u3068
- I_ocpd = I_load \/ 0.80 = I_load \u00d7 1.25<\/p>\n\n\n\n

\u8907\u5408\u52b9\u679c<\/strong>:
1.25 \u00d7 1.25 = 1.5625 \u2248 1.56<\/strong><\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u306e\u30bd\u30fc\u30e9\u30fc\u30b9\u30c8\u30ea\u30f3\u30b0\u8a08\u7b97<\/h3>\n\n\n\n

\u30b7\u30b9\u30c6\u30e0\u4f8b<\/strong>:
- \u30e2\u30b8\u30e5\u30fc\u30eb400W\u3001I_sc = 11.24A\uff08\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3088\u308a\uff09
- \u30b9\u30c8\u30ea\u30f3\u30b0\u69cb\u6210\uff1a20\u30e2\u30b8\u30e5\u30fc\u30eb\u76f4\u5217<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d71 - \u30e2\u30b8\u30e5\u30fc\u30ebI_sc\u306e\u691c\u8a3c<\/strong>:
\u5b9a\u683c\u96fb\u529b\u304b\u3089\u8a08\u7b97\u3057\u305f\u5024\u3067\u306f\u306a\u304f\u3001\u5fc5\u305a\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306eI_sc\u5024\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d72 - NEC690.8\u4e57\u7387\u3092\u9069\u7528\u3059\u308b<\/strong>:
I_ocpd_min = 11.24A \u00d7 1.56 = 17.53A<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d73 - \u6a19\u6e96\u683c\u4ed8\u3051\u3092\u9078\u629e\u3059\u308b<\/strong>:
\u6a19\u6e96DC\u30d6\u30ec\u30fc\u30ab\u30fc\u5b9a\u683c10a, 16a, 20a, 25a, 32a...
\u9078\u629e\uff1a20A<\/strong> (\u6b21\u306e\u30b5\u30a4\u30ba\u306f17.53A\uff09<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d74 - \u30ef\u30a4\u30e4\u306e\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\u3092\u78ba\u8a8d\u3059\u308b<\/strong> (\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\uff09\uff1a<\/p>\n\n\n\n

\u30ef\u30a4\u30e4\u30fc\u30b5\u30a4\u30ba<\/th>30\u2103\u306b\u304a\u3051\u308b\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf<\/th>60\u2103\u3067\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0<\/th>20A\u30d6\u30ec\u30fc\u30ab\u30fc\u3067OK\uff1f<\/th><\/tr><\/thead>
14 AWG<\/strong><\/td>20A<\/td>11.6A<\/td>NO<\/td><\/tr>
12 AWG<\/strong><\/td>25A<\/td>14.5A<\/td>NO<\/td><\/tr>
10 AWG<\/strong><\/td>30A<\/td>17.4A<\/td>NO<\/td><\/tr>
8 AWG<\/strong><\/td>40A<\/td>23.2A<\/td>\u306f\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

60\u2103\u306b\u304a\u3051\u308b\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570\uff1a0.58\uff08NEC\u8868310.15(B)(2)(a)\u3088\u308a\uff09<\/p>\n\n\n\n

\u91cd\u8981\u306a\u767a\u898b<\/strong>:10 AWG\u3067\u306f\u4e0d\u5341\u5206\uff01\u306b\u30b5\u30a4\u30ba\u30a2\u30c3\u30d7\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 8AWG\u30ef\u30a4\u30e4\u30fc<\/strong> 20A\u30d6\u30ec\u30fc\u30ab\u30fc\u5bfe\u5fdc.<\/p>\n\n\n\n

\n

\u26a0\ufe0f \u3088\u304f\u3042\u308b\u9593\u9055\u3044<\/strong>:\u96fb\u7dda\u306e\u8010\u529b\u3092\u78ba\u8a8d\u305b\u305a\u3001NEC690.8\u306e\u8a08\u7b97\u306e\u307f\u306b\u57fa\u3065\u3044\u3066\u30d6\u30ec\u30fc\u30ab\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3002\u3053\u308c\u306f\u3001NEC 240.4(D)\u306b\u9055\u53cd\u3057\u3001\u706b\u707d\u306e\u5371\u967a\u3092\u5f15\u304d\u8d77\u3053\u3059-\u30d6\u30ec\u30fc\u30ab\u304c\u96fb\u7dda\u3092\u904e\u71b1\u3059\u308b\u96fb\u6d41\u3092\u6d41\u3059\u3002.<\/p>\n<\/blockquote>\n\n\n\n

\u30a2\u30ec\u30a4\u30ec\u30d9\u30eb\u4e3b\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30b8\u30f3\u30b0<\/h3>\n\n\n\n

\u30b3\u30f3\u30d0\u30a4\u30ca\u30fc\u306e\u51fa\u529b\u304c\u30a4\u30f3\u30d0\u30fc\u30bf\u306b\u4f9b\u7d66\u3055\u308c\u308b\u5834\u5408\uff1a<\/p>\n\n\n\n

\u30d5\u30a9\u30fc\u30df\u30e5\u30e9<\/strong>:
I_main = (N_strings \u00d7 I_sc \u00d7 1.25) \u00f7 0.80<\/p>\n\n\n\n

0.80\u306e\u9664\u6570\u306b\u3088\u308a\u3001\u30d6\u30ec\u30fc\u30ab\u306f\u6700\u9069\u306a\u7bc4\u56f2\uff0880%\u8ca0\u8377\uff09\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n

\u4f8b - 8\u30b9\u30c8\u30ea\u30f3\u30b0\u30fb\u30b7\u30b9\u30c6\u30e0<\/strong>:
- \u5f26\uff1a8\u30d1\u30e9\u30ec\u30eb
- I_sc\/\u30b9\u30c8\u30ea\u30f3\u30b011.24A
- \u8a08\u7b97\uff1a\uff088\u00d711.24A\u00d71.25\uff09\u00f70.80\uff1d140.5A
- \u9078\u3070\u308c\u305f\uff1a 160A DC\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong><\/p>\n\n\n\n

\u30a4\u30f3\u30d0\u30fc\u30bf\u30fc\u306b\u5bfe\u3059\u308b\u691c\u8a3c<\/strong>:
- \u30a4\u30f3\u30d0\u30fc\u30bf\u30fc\u6700\u5927DC\u5165\u529b150A\uff08\u30de\u30cb\u30e5\u30a2\u30eb\u3088\u308a\uff09
- 160A\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u30a4\u30f3\u30d0\u30fc\u30bf\u5165\u529b\u3092\u4fdd\u8b77
- \u30a4\u30f3\u30d0\u30fc\u30bf\u306e\u30ea\u30df\u30c3\u30c8\u304c120A\u306e\u5834\u5408\u3001\u4ee3\u308f\u308a\u306b125A\u306e\u30d6\u30ec\u30fc\u30ab\u3092\u4f7f\u7528\u3059\u308b\u3002<\/p>\n\n\n\n

\"NEC<\/figure>\n\n\n\n

\u6e29\u5ea6\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u4fc2\u6570\u3068\u30ef\u30a4\u30e4\u306e\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf<\/h2>\n\n\n\n

NEC \u8868 310.15(B)(2)(a) \u88dc\u6b63\u4fc2\u6570<\/h3>\n\n\n\n

\u96fb\u7dda\u306e\u8010\u529b\u306f\u9ad8\u6e29\u306b\u306a\u308b\u3068\u4f4e\u4e0b\u3059\u308b\uff1a<\/p>\n\n\n\n

I_derated = I_ampacity_30C \u00d7 Correction_Factor<\/strong><\/p>\n\n\n\n

\u4e00\u822c\u7684\u306a\u88dc\u6b63\u4fc2\u6570<\/strong>:<\/p>\n\n\n\n

\u5468\u56f2\u6e29\u5ea6<\/th>\u88dc\u6b63\u4fc2\u6570<\/th>\u7533\u3057\u8fbc\u307f<\/th><\/tr><\/thead>
30\u00b0C<\/strong><\/td>1.00<\/td>\u57fa\u6e96\u6e29\u5ea6<\/td><\/tr>
40\u00b0C<\/strong><\/td>0.91<\/td>\u5ba4\u5185\u7a7a\u8abf\u30b9\u30da\u30fc\u30b9<\/td><\/tr>
50\u00b0C<\/strong><\/td>0.82<\/td>\u5c4b\u6839\u88cf\u90e8\u5c4b\u3001\u5c4b\u5185\u7121\u8abf\u6574<\/td><\/tr>
60\u00b0C<\/strong><\/td>0.58<\/td>\u5c4b\u6839\u7f6e\u304d\u30b3\u30f3\u30b8\u30c3\u30c8\uff08\u5171\u901a\uff09<\/td><\/tr>
70\u00b0C<\/strong><\/td>0.41<\/td>\u76f4\u5c04\u65e5\u5149\u3001\u7802\u6f20<\/td><\/tr>
80\u00b0C<\/strong><\/td>0.29<\/td>\u6975\u9650\u72b6\u614b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u5b9f\u4e16\u754c\u306e\u6e29\u5ea6\u63a8\u5b9a<\/h3>\n\n\n\n

\u5c4b\u4e0a\u30b3\u30f3\u30b8\u30c3\u30c8\u6e29\u5ea6<\/strong>:
T_conduit = T_ambient + T_solar + T_wire<\/p>\n\n\n\n

\u3069\u3053\u3067\u3060\uff1a
- T_ambient = \u5916\u6c17\u6e29\u5ea6
- T_solar = \u592a\u967d\u71b1\uff08\u592a\u967d\u306b\u7167\u3089\u3055\u308c\u305f\u9ed2\u5c0e\u7ba1\u3067\u306f20\uff5e30\u5ea6\uff09
- T_wire = I\u00b2R\u52a0\u71b1\uff08\u96fb\u6d41\u306b\u3088\u308a5\uff5e15\u00b0C\uff09<\/p>\n\n\n\n

\u4f8b - \u30d5\u30a7\u30cb\u30c3\u30af\u30b9\u306e\u590f<\/strong>:
- \u5468\u56f2\u6e29\u5ea6\uff1a45
- \u592a\u967d\u71b1\u6696\u623f: 25\u00b0C (\u9ed2\u3044\u91d1\u5c5e\u5c0e\u7ba1)
- \u30ef\u30a4\u30e4\u30fc\u52a0\u71b1\uff1a10\u00b0C
- \u5408\u8a08\uff1a80<\/strong><\/p>\n\n\n\n

\u30a2\u30f3\u30da\u30a2\u30a4\u30f3\u30d1\u30af\u30c8<\/strong>:
- 10AWG\u300130\u2103\u306b\u3066\uff1a30A
- 10AWG\u300180\u2103\u306e\u5834\u5408\uff1a30A \u00d7 0.29 = 8.7A<\/strong><\/p>\n\n\n\n

10AWG\u306e\u30ef\u30a4\u30e4\u30fc\u306f\u3001\u6975\u7aef\u306a\u6691\u3055\u306771%\u306e\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\u3092\u5931\u3044\u307e\u3059\uff01<\/p>\n\n\n\n

\u30b3\u30f3\u30b8\u30c3\u30c8\u30fb\u30d5\u30a3\u30eb\u306e\u8abf\u6574<\/h3>\n\n\n\n

NEC\u8868310.15(B)(3)(a)\u306f\u3001\u96fb\u7dda\u7ba1\u5185\u306b3\u672c\u4ee5\u4e0a\u306e\u901a\u96fb\u5c0e\u4f53\u304c\u3042\u308b\u5834\u5408\u3001\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u8981\u6c42\u3057\u3066\u3044\u308b\uff1a<\/p>\n\n\n\n

\u5c0e\u4f53\u6570<\/th>\u8abf\u6574\u4fc2\u6570<\/th><\/tr><\/thead>
1-3<\/td>1.00\uff08\u8abf\u6574\u306a\u3057\uff09<\/td><\/tr>
4-6<\/td>0.80<\/td><\/tr>
7-9<\/td>0.70<\/td><\/tr>
10-20<\/td>0.50<\/td><\/tr>
21-30<\/td>0.45<\/td><\/tr>
31-40<\/td>0.40<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u8907\u5408\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>:
I_final = I_ampacity \u00d7 f_temp \u00d7 f_fill<\/p>\n\n\n\n

\u4f8b - 60\u2103\u306b\u304a\u3051\u308b6\u672c\u306e\u5c0e\u4f53<\/strong>:
- 10 AWG\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\uff1a30A
- \u6e29\u5ea6\uff0860\uff090.58
- \u30b3\u30f3\u30b8\u30c3\u30c8\u30fb\u30d5\u30a3\u30eb\uff086\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\uff09\uff1a0.80
- \u6c7a\u52dd30a \u00d7 0.58 \u00d7 0.80 = 13.9a<\/strong><\/p>\n\n\n\n

\n

\ud83c\udfaf \u30c7\u30b6\u30a4\u30f3\u30fb\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong>:\u5c4b\u4e0a\u592a\u967d\u5149\u767a\u96fb\u8a2d\u5099\u3067\u306f\u3001\u6700\u4f4e\u5468\u56f2\u6e29\u5ea660\u2103\u3092\u60f3\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u7802\u6f20\u6c17\u5019\u307e\u305f\u306f\u9ed2\u8272\u96fb\u7dda\u7ba1\u3067\u306f70\u2103\u3092\u4f7f\u7528\u3002\u5fc5\u305a\u73fe\u5730\u8abf\u67fb\u6642\u306b\u5b9f\u969b\u306e\u8a2d\u7f6e\u6761\u4ef6\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/blockquote>\n\n\n\n

\u9023\u7d9a\u8ca0\u8377\u3068\u30d4\u30fc\u30af\u8ca0\u8377\u306e\u6bd4\u8f03<\/h2>\n\n\n\n

\u8ca0\u8377\u671f\u9593\u30ab\u30c6\u30b4\u30ea\u30fc<\/h3>\n\n\n\n

\u9023\u7d9a\u8ca0\u8377<\/strong> (NEC\u306e\u5b9a\u7fa9\uff09\uff1a
- \u306e\u305f\u3081\u306b\u904b\u55b6\u3059\u308b\u3002 3\u6642\u9593\u4ee5\u4e0a<\/strong>
- \u4f8b\u592a\u967d\u5149\u767a\u96fb\u3001\u30d0\u30c3\u30c6\u30ea\u30fc\u5145\u96fb\u3001HVDC\u9001\u96fb
- \u8981\u4ef6\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u5b9a\u683c\u2265\u8ca0\u8377\u96fb\u6d41\u306e125%<\/p>\n\n\n\n

\u975e\u9023\u7d9a\u8ca0\u8377<\/strong>:
- \u904b\u8ee2\u6642\u9593\uff1a\uff1c3 \u6642\u9593\u4f8b\uff1a\u30e2\u30fc\u30bf\u30fc\u59cb\u52d5\u3001\u77ed\u671f\u8a66\u9a13\u3001\u65ad\u7d9a\u7684\u6a5f\u5668 - \u8981\u4ef6\u5b9a\u683c\uff1a\u8ca0\u8377\u96fb\u6d41\u306e 100% \u4ee5\u4e0a\u306e\u30d6\u30ec\u30fc\u30ab<\/p>\n\n\n\n

\u9023\u7d9a\u8ca0\u8377\u3068\u3057\u3066\u306e\u592a\u967d\u5149\u767a\u96fb<\/h3>\n\n\n\n

\u771f\u663c\u306e\u592a\u967d\u5149\u767a\u96fb\u306f5\uff5e8\u6642\u9593\u9023\u7d9a\u7a3c\u50cd\u3059\u308b\uff1a<\/p>\n\n\n\n

\u30b5\u30a4\u30ba\u8981\u4ef6<\/strong>:
I_breaker \u2265 I_load_continuous \u00d7 1.25<\/p>\n\n\n\n

\u3053\u308c\u306f \u642d\u8f09\u6e08\u307f<\/strong> NEC 690.8\u306e1.56\u500d\uff081.56 = 1.25 \u00d7 1.25\uff09\u3002.<\/p>\n\n\n\n

\u3088\u304f\u3042\u308b\u6df7\u4e71<\/strong>:
NEC690.8\u306e\u7d50\u679c\u306b1.25\u500d\u3092\u9069\u7528\u3059\u308b\u8a2d\u8a08\u8005\u3082\u3044\u308b\uff1a
- I_sc = 10A
- \u30cd\u30c3\u30af690.8\uff1a10a\u00d71.56\uff1d15.6a
- \u4e0d\u6b63\u89e3<\/strong>:15.6A\u00d71.25\uff1d19.5A\uff08\u30c0\u30d6\u30eb\u30ab\u30a6\u30f3\u30c8\u9023\u7d9a\u4fc2\u6570\uff09
- \u6b63\u3057\u3044<\/strong>:15.6A\u219216A\u307e\u305f\u306f20A\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u9078\u629e<\/p>\n\n\n\n

\u8108\u52d5\u8ca0\u8377\u306e\u30d4\u30fc\u30af\u96fb\u6d41\u3068\u5b9f\u52b9\u96fb\u6d41\u306e\u6bd4\u8f03<\/h3>\n\n\n\n

\u30a4\u30f3\u30d0\u30fc\u30bf\u30fc\u8ca0\u8377\u306b\u3088\u308bDC\u30de\u30a4\u30af\u30ed\u30b0\u30ea\u30c3\u30c9<\/strong>:<\/p>\n\n\n\n

\u30a4\u30f3\u30d0\u30fc\u30bf\u30fc\u306f\u3001\u9ad8\u3044\u6ce2\u9ad8\u7387\u306e\u8108\u52d5\u76f4\u6d41\u96fb\u6d41\u3092\u6d41\u3059\uff1a
- \u5e73\u5747\uff08RMS\uff09\u96fb\u6d41<\/strong>:50A
- \u30d4\u30fc\u30af\u96fb\u6d41<\/strong>:100A (\u30af\u30ec\u30b9\u30c8\u30d5\u30a1\u30af\u30bf\u30fc2:1)<\/p>\n\n\n\n

\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u30b5\u30a4\u30b8\u30f3\u30b0<\/strong>:
- \u30b5\u30fc\u30de\u30eb\u30fb\u30c8\u30ea\u30c3\u30d7<\/strong> \u306f\u5b9f\u52b9\u52a0\u71b1\u306b\u5bfe\u5fdc\u3057\u307e\u3059\uff1a\u5b9f\u52b9\u96fb\u6d41\u306b\u5bfe\u3059\u308b\u30b5\u30a4\u30ba
- \u30de\u30b0\u30cd\u30c6\u30a3\u30c3\u30af\u30fb\u30c8\u30ea\u30c3\u30d7<\/strong> \u30d4\u30fc\u30af\u306b\u5bfe\u5fdc\u3059\u308b\uff1a\u30d4\u30fc\u30af\u304c\u8ff7\u60d1\u306a\u30c8\u30ea\u30c3\u30d7\u3092\u5f15\u304d\u8d77\u3053\u3055\u306a\u3044\u3088\u3046\u306b\u3059\u308b<\/p>\n\n\n\n

\u30bb\u30ec\u30af\u30b7\u30e7\u30f3<\/strong>:
- I_RMS = 50A \u2192 63A\u30d6\u30ec\u30fc\u30ab\u3092\u9078\u629e\uff08\u9023\u7d9a\uff1a50A \u00d7 1.25 = 62.5A\uff09
- \u78c1\u6c17\u30c8\u30ea\u30c3\u30d7\u3092\u78ba\u8a8d\u3059\u308b\uff1a63A C\u30ab\u30fc\u30d6\u304c315\uff5e630A\u3067\u30c8\u30ea\u30c3\u30d7
- \u30d4\u30fc\u30af100A\u306f\u78c1\u6c17\u3057\u304d\u3044\u5024\u3088\u308a\u304b\u306a\u308a\u4f4e\u3044\u2713\u3002<\/p>\n\n\n\n

\"\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30ba\u8a08\u7b97\u306e\u305f\u3081\u306e\u5468\u56f2\u6e29\u5ea6\u304a\u3088\u3073\u96fb\u7dda\u7ba1\u5145\u586b\u91cf\u306e\u88dc\u6b63\u4fc2\u6570\u3092\u793a\u3059\u96fb\u7dda\u8010\u529b\u6e29\u5ea6\u8efd\u6e1b\u30c1\u30e3\u30fc\u30c8\"\/<\/figure>\n\n\n\n

\u8ca0\u8377\u30bf\u30a4\u30d7\u306e\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u9078\u629e<\/h2>\n\n\n\n

\u62b5\u6297\u6027\u8ca0\u8377\u3068\u8a98\u5c0e\u6027\u8ca0\u8377\u3068\u5bb9\u91cf\u6027\u8ca0\u8377<\/h3>\n\n\n\n

\u30d6\u30ec\u30fc\u30ab\u30fc\u9078\u5b9a\u306b\u304a\u3051\u308b\u8ca0\u8377\u30bf\u30a4\u30d7\u306e\u5f71\u97ff<\/strong>:<\/p>\n\n\n\n

\u8ca0\u8377\u30bf\u30a4\u30d7<\/th>\u7279\u5fb4<\/th>\u7a81\u5165\u96fb\u6d41<\/th>\u63a8\u5968\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6<\/th><\/tr><\/thead>
\u62b5\u6297\u6027<\/strong>
(\u30d2\u30fc\u30bf\u30fc\u3001LED\u7167\u660e\uff09<\/td>		\u5b9a\u5e38\u96fb\u6d41
\u30a4\u30f3\u30e9\u30c3\u30b7\u30e5\u306a\u3057<\/td>		1.0-1.2\u00d7 I_rated<\/td>B\u30ab\u30fc\u30d6\uff083-5\u00d7\u30a4\u30f3\uff09<\/td><\/tr>
\u592a\u967d\u5149\u767a\u96fb<\/strong>
\uff08\u592a\u967d\u5149\u767a\u96fb\u30a2\u30ec\u30a4\uff09<\/td>		\u96fb\u6d41\u5236\u9650
\u30e2\u30b8\u30e5\u30fc\u30eb\u7269\u7406\u5b66\u306b\u3088\u308b<\/td>		1.0-1.15\u00d7 I_sc<\/td>C\u30ab\u30fc\u30d6 (5-10\u00d7 In)<\/td><\/tr>
\u30d0\u30c3\u30c6\u30ea\u30fc<\/strong>
(\u30ea\u30c1\u30a6\u30e0\u30a4\u30aa\u30f3\u3001\u925b\u84c4\u96fb\u6c60\uff09<\/td>		\u30b5\u30fc\u30b8
\u5145\u653e\u96fb<\/td>		2-3\u00d7 I_rated<\/td>C\u307e\u305f\u306fD\u30ab\u30fc\u30d6<\/td><\/tr>
\u8a98\u5c0e\u6027<\/strong>
(\u30e2\u30fc\u30bf\u30fc\u3001\u30c8\u30e9\u30f3\u30b9\uff09<\/td>		\u9ad8\u30b9\u30bf\u30fc\u30c8
\u73fe\u5728<\/td>		5-10\u00d7 I_rated<\/td>D\u30ab\u30fc\u30d6 (10-20\u00d7 In)<\/td><\/tr>
\u9759\u96fb\u5bb9\u91cf\u5f0f<\/strong>
(DC\u30ea\u30f3\u30af\u30b3\u30f3\u30c7\u30f3\u30b5)<\/td>		\u5927\u7a81\u5165
\u5145\u96fb\u4e2d<\/td>		10-50\u00d7 I_rated
\u7565<\/td>		D\u30ab\u30fc\u30d6\uff0b\u7a81\u5165
\u9650\u5b9a\u7684<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u30e2\u30fc\u30bf\u30fc\u8ca0\u8377\u306e\u30b5\u30a4\u30b8\u30f3\u30b0\u4f8b<\/h3>\n\n\n\n

DC\u30e2\u30fc\u30bf\u30fc\u4ed5\u69d8<\/strong>:
- \u5b9a\u683c\u51fa\u529b\uff1a5 kW
- \u5b9a\u683c\u96fb\u5727\uff1aDC250V
- \u5b9a\u683c\u96fb\u6d41\uff1a22A
- \u59cb\u52d5\u96fb\u6d41\uff1a6\u00d7\u5b9a\u683c\uff1d132A
- \u958b\u59cb\u6642\u95933\u79d2<\/p>\n\n\n\n

\u30d6\u30ec\u30fc\u30ab\u30fc\u9078\u5b9a\u30d7\u30ed\u30bb\u30b9<\/strong>:<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d71 - \u7d99\u7d9a\u7684\u683c\u4ed8\u3051<\/strong>:
I_breaker \u2265 22A \u00d7 1.25 = 27.5A
\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\uff1a32A\u30d6\u30ec\u30fc\u30ab\u30fc<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d72 - \u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u30c1\u30a7\u30c3\u30af<\/strong>:
- 32A\u306eD\u30ab\u30fc\u30d6\uff1a320-640A\u3067\u78c1\u6c17\u30c8\u30ea\u30c3\u30d7
- \u78c1\u6c17\u3057\u304d\u3044\u5024\u2713\u3092\u5927\u5e45\u306b\u4e0b\u56de\u308b\u59cb\u52d5\u96fb\u6d41132A
- C\u30ab\u30fc\u30d6\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/strong>:32A \u00d7 10 = 320A \u6700\u5927\u78c1\u6c17\u30c8\u30ea\u30c3\u30d7
- 132A\u3092\u59cb\u52d5\u3055\u305b\u308b\u3068\u3001\u30c8\u30ea\u30c3\u30d7D\u30ab\u30fc\u30d6\u304c\u60aa\u5316\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b<\/p>\n\n\n\n

\u30b9\u30c6\u30c3\u30d73 - \u71b1\u691c\u8a3c<\/strong>:
- 132A\u30923\u79d2\u9593\u4f7f\u7528\u3057\u3066\u3082\u30b5\u30fc\u30de\u30eb\u30a8\u30ec\u30e1\u30f3\u30c8\u306f\u30c8\u30ea\u30c3\u30d7\u3057\u306a\u3044
- \u30b5\u30fc\u30de\u30eb\u30fb\u30c8\u30ea\u30c3\u30d7\u306b\u306f\u901a\u5e381.45\u00d7 In\u304c60\u5206\u9593\u5fc5\u8981
- 132A \/ 32A = 4.1\u00d7 3s\u30bb\u30fc\u30d5\u306e\u307f<\/p>\n\n\n\n

\u6700\u7d42\u9078\u629e32A D\u30ab\u30fc\u30d6DC\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong><\/p>\n\n\n\n

\u5bb9\u91cf\u6027\u7a81\u5165\u306e\u7de9\u548c<\/h3>\n\n\n\n

\u554f\u984c\u70b9<\/strong>:
DC\u30d0\u30b9\u30fb\u30b3\u30f3\u30c7\u30f3\u30b5\uff08\u30a4\u30f3\u30d0\u30fc\u30bf\u3001VFD\u3067\u4e00\u822c\u7684\uff09\u306f\u3001\u901a\u96fb\u6642\u306b1\uff5e10ms\u306e\u9593\u30011000\uff5e5000A\u306e\u7a81\u5165\u96fb\u6d41\u3092\u6d41\u3059\u3053\u3068\u304c\u3042\u308b\u3002.<\/p>\n\n\n\n

\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/strong>:<\/p>\n\n\n\n

\u30aa\u30d7\u30b7\u30e7\u30f31 - \u30d7\u30ea\u30c1\u30e3\u30fc\u30b8\u62b5\u6297\u5668<\/strong>:<\/p>\n\n\n\n

\u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab--[\u30d7\u30ea\u30c1\u30e3\u30fc\u30b8\u62b5\u6297]--[\u30d0\u30a4\u30d1\u30b9\u30b3\u30f3\u30bf\u30af\u30bf]--\u30b3\u30f3\u30c7\u30f3\u30b5\n                                           (\u30b3\u30f3\u30c7\u30f3\u30b5\n                                            \u30b3\u30f3\u30c7\u30f3\u30b5\uff09\n<\/code><\/pre>\n\n\n\n
\u7a81\u5165\u96fb\u6d41\u309210-50A\u306b\u5236\u9650\u3057\u3001\u305d\u306e\u5f8c\u901a\u5e38\u52d5\u4f5c\u306e\u305f\u3081\u306b\u30d0\u30a4\u30d1\u30b9\u3055\u308c\u308b\u3002.<\/p>\n\n\n\n
\u30aa\u30d7\u30b7\u30e7\u30f32 - \u30bd\u30d5\u30c8\u30b9\u30bf\u30fc\u30c8\u56de\u8def<\/strong>:
\u96fb\u5b50\u56de\u8def\u306f100\uff5e500\u30df\u30ea\u79d2\u304b\u3051\u3066\u30b3\u30f3\u30c7\u30f3\u30b5\u30fc\u306e\u96fb\u5727\u3092\u5f90\u3005\u306b\u4e0a\u6607\u3055\u305b\u308b\u3002.<\/p>\n\n\n\n
\u30aa\u30d7\u30b7\u30e7\u30f33 - \u7279\u5927D\u30ab\u30fc\u30d6\u30fb\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong>:
\u9023\u7d9a\u96fb\u6d412\u500d\u306e\u30b5\u30a4\u30ba\u30d6\u30ec\u30fc\u30ab\u3001D\u30ab\u30fc\u30d6\u306f20\u500d\u306e\u7a81\u5165\u306b\u8010\u3048\u308b\u3002.
- \u9023\u7d9a\uff1a50A \u2192 100A\u306eD\u30ab\u30fc\u30d6\u3092\u9078\u629e
- \u78c1\u6c17\u30c8\u30ea\u30c3\u30d7\uff1a1000-2000A
- \u7a81\u5165\uff1a500A\uff0810\u00d7\uff09\u306f\u30c8\u30ea\u30c3\u30d7\u3057\u306a\u3044<\/p>\n\n\n\n
\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5<\/strong>:\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30b8\u30f3\u30b0\u306f\u4fdd\u8b77\u54c1\u8cea\u3092\u4f4e\u4e0b\u3055\u305b\u308b-\u30ef\u30a4\u30e4\u306f\u3088\u308a\u5927\u304d\u306a\u30d6\u30ec\u30fc\u30ab\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002.<\/p>\n\n\n\n
\"\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u8ca0\u8377\u30bf\u30a4\u30d7\u3068\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u30de\u30c3\u30c1\u30f3\u30b0\u6c7a\u5b9a\u30c4\u30ea\u30fc\uff08\u8ff7\u60d1\u30c8\u30ea\u30c3\u30d7\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u4f34\u3046\u62b5\u6297\u6027\u30bd\u30fc\u30e9\u30fcPV\u30d0\u30c3\u30c6\u30ea\u30fc\u30e2\u30fc\u30bf\u30fc\u304a\u3088\u3073\u5bb9\u91cf\u6027\u8ca0\u8377\u306eB<\/figure>\n\n\n\n
\u3088\u304f\u3042\u308b\u30b5\u30a4\u30ba\u306e\u9593\u9055\u3044\u3068\u4fee\u6b63<\/h2>\n\n\n\n
\u274c \u30a8\u30e9\u30fc #1\uff1a\u6e29\u5ea6\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u7121\u8996<\/h3>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa<\/strong>:
- \u8a2d\u8a08\u8005\u306f\u3001NEC690.8 \u306e\u8a08\u7b97\u306b\u5f93\u3063\u3066 20A \u30d6\u30ec\u30fc\u30ab\u3092\u9078\u629e\u3059\u308b\u3002
- 12 AWG \u30ef\u30a4\u30e4\uff0830\u00b0C \u3067 25A\uff09\u3092\u6307\u5b9a\u3059\u308b\u3002
- \u5c4b\u4e0a\u306e\u96fb\u7dda\u7ba1\u306b\u8a2d\u7f6e\uff08\u5b9f\u6e2c60\uff09<\/p>\n\n\n\n
\u554f\u984c\u70b9<\/strong>:
- 12AWG\u300160\u2103\u306e\u5834\u5408\uff1a25A \u00d7 0.58 = 14.5A
- 20A\u30d6\u30ec\u30fc\u30ab\u304c38%\u306e\u96fb\u7dda\u5bb9\u91cf\u3092\u8d85\u3048\u308b<\/p>\n\n\n\n
\u8a02\u6b63<\/strong>:
- \u30ef\u30a4\u30e4\u30fc\u309210AWG\u306b\u30a2\u30c3\u30d7\u30b5\u30a4\u30ba\uff1a30A\u00d70.58\uff1d17.4A\uff08\u307e\u3060\u8db3\u308a\u306a\u3044!\uff09
\u2013 Upsize to 8 AWG: 40A \u00d7 0.58 = 23.2A \u2713<\/p>\n\n\n\n
\u30ec\u30c3\u30b9\u30f3<\/strong>:\u30d6\u30ec\u30fc\u30ab\u306e\u5b9a\u683c\u3068\u6bd4\u8f03\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u6e29\u5ea6\u88dc\u6b63\u3092\u884c\u3063\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
\u30a8\u30e9\u30fc #2\uff1a\u592a\u967d\u5149\u767a\u96fb\u7528\u30e2\u30fc\u30bf\u30fc\u516c\u5f0f\u306e\u4f7f\u7528<\/h3>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa<\/strong>:
- \u30e2\u30fc\u30bf\u30fc\u56de\u8def\u306b\u7cbe\u901a\u3057\u305f\u8a2d\u8a08\u8005
- NEC 430\u30e2\u30fc\u30bf\u5f0f\u3092\u9069\u7528\uff1aFLA\u306e125%
- 10A\u30bd\u30fc\u30e9\u30fc\u30b9\u30c8\u30ea\u30f3\u30b0\u306e\u5834\u540810A\u00d71.25\uff1d12.5A\u219216A\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u9078\u629e<\/p>\n\n\n\n
\u554f\u984c\u70b9<\/strong>:
- \u592a\u967d\u96fb\u6c60\u306b\u306fNEC690.8\uff1a10A \u00d7\u304c\u5fc5\u8981 1.56<\/strong> = 15.6A \u2192 \u6700\u4f4e16A\u5fc5\u8981
- \u9650\u754c16A\u30d6\u30ec\u30fc\u30ab\u30fc\uff08\u6700\u4f4e\u3067\u3082\u6b63\u78ba\u306b\uff09<\/p>\n\n\n\n
\u8a02\u6b63<\/strong>:
- \u592a\u967d\u96fb\u6c60\u306b\u7279\u5316\u3057\u305fNEC690.8\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3002
- \u7d50\u679c\u9069\u5207\u306a\u30de\u30fc\u30b8\u30f3\u306e\u305f\u3081\u306b20A\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u9078\u629e<\/p>\n\n\n\n
\u30ec\u30c3\u30b9\u30f3<\/strong>:NEC\u306e\u8a18\u4e8b\u306b\u3088\u3063\u3066\u30b5\u30a4\u30ba\u898f\u5b9a\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u6b63\u3057\u3044\u8a18\u4e8b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3002.<\/p>\n\n\n\n
\u30a8\u30e9\u30fc #3\uff1a\u201c\u5b89\u5168\u30de\u30fc\u30b8\u30f3 \u201d\u306e\u305f\u3081\u306e\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30b8\u30f3\u30b0\u201d<\/h3>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa<\/strong>:
- NEC\u306e\u8a08\u7b97\uff1a17.5A\u5fc5\u8981
- \u6a19\u6e96\u30b5\u30a4\u30ba\uff1a16A\u300120A\u300125A
- \u30c7\u30b6\u30a4\u30ca\u30fc\u306f \u201c\u5b89\u5168\u306e\u305f\u3081 \u201d\u306b25A\u3092\u9078\u629e\u201d<\/p>\n\n\n\n
\u554f\u984c\u70b9<\/strong>:
- 10 AWG \u30ef\u30a4\u30e4\uff08\u6307\u5b9a\uff09\uff1a60\u2103\u306717.4A
- 25A\u30d6\u30ec\u30fc\u30ab\u30fc\u306b\u3088\u308a\u3001\u30c8\u30ea\u30c3\u30d7\u524d\u306b25A\u3092\u901a\u96fb\u53ef\u80fd
- \u30ef\u30a4\u30e4\u30fc\u304c17.4A\u3067\u904e\u71b1\u2192\u706b\u707d\u306e\u5371\u967a\u6027<\/p>\n\n\n\n
\u8a02\u6b63<\/strong>:
- 60\u00b0C \u3067 10 AWG \u306e\u6700\u5927 20A \u30d6\u30ec\u30fc\u30ab
- 25A\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u6700\u5c0f8AWG\u306b\u30b5\u30a4\u30ba\u30a2\u30c3\u30d7\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n
\u30ec\u30c3\u30b9\u30f3<\/strong>:\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u30b5\u30a4\u30b8\u30f3\u30b0\u306b\u304a\u3051\u308b\u300c\u5b89\u5168\u30de\u30fc\u30b8\u30f3\u300d\u3068\u306f\u3001\u96fb\u7dda\u304c\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u78ba\u5b9f\u306b\u652f\u3048\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u3001\u6063\u610f\u7684\u306b\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30b8\u30f3\u30b0\u3059\u308b\u3053\u3068\u3067\u306f\u306a\u3044\u3002.<\/p>\n\n\n\n
\u30a8\u30e9\u30fc #4\uff1a\u8907\u6570\u8ca0\u8377\u30bf\u30a4\u30d7\u7528\u5358\u4e00\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab<\/h3>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa<\/strong>:
- \u56de\u8def\u306f\u9023\u7d9a\uff0830A\u30bd\u30fc\u30e9\u30fc\uff09\u3068\u30e2\u30fc\u30bf\u30fc\uff0820A\u3001100A\u59cb\u52d5\uff09\u306e\u4e21\u65b9\u306b\u4f9b\u7d66
- \u30c7\u30b6\u30a4\u30ca\u30fc\u30b5\u30a4\u30ba\uff1a (30 + 20) \u00d7 1.25 = 62.5A \u2192 63A \u30d6\u30ec\u30fc\u30ab\u30fc<\/p>\n\n\n\n
\u554f\u984c\u70b9<\/strong>:
- 100A\u306e\u30e2\u30fc\u30bf\u7a81\u5165\u306b\u3088\u308a\u300163A\u306eC\u30ab\u30fc\u30d6\u30d6\u30ec\u30fc\u30ab\u304c\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff08315\uff5e630A\u3067\u78c1\u6c17\u5f0f\uff09
- \u30e2\u30fc\u30bf\u30fc\u59cb\u52d5\u6642\u306b\u767a\u751f\u3059\u308b\u3001\u308f\u305a\u304b\u306a\u78ba\u7387\u306e\u8ff7\u60d1\u30c8\u30ea\u30c3\u30d7<\/p>\n\n\n\n
\u8a02\u6b63<\/strong>:
\u30aa\u30d7\u30b7\u30e7\u30f31<\/strong>:D\u30ab\u30fc\u30d6\u30d6\u30ec\u30fc\u30ab\uff08630\u301c1260A\u306e\u78c1\u6027\uff09\u3092\u4f7f\u7528\u3059\u308b\u3002
\u30aa\u30d7\u30b7\u30e7\u30f32<\/strong>:\u5225\u56de\u8def\uff1a
- \u30bd\u30fc\u30e9\u30fc40A C\u30ab\u30fc\u30d6\uff0830A\u00d71.25\u5207\u308a\u4e0a\u3052\uff09
- \u30e2\u30fc\u30bf\u30fc\uff1a25A D\u30ab\u30fc\u30d6\uff0820A\u00d71.25\uff09<\/p>\n\n\n\n
\u30ec\u30c3\u30b9\u30f3<\/strong>:\u5358\u4e00\u56de\u8def\u306b\u8ca0\u8377\u30bf\u30a4\u30d7\u3092\u6df7\u5728\u3055\u305b\u308b\u306b\u306f\u3001\u614e\u91cd\u306a\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u9078\u629e\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n\n\n\n
\u30a8\u30e9\u30fc 1TP574T5\uff1a\u4e26\u5217\u30b9\u30c8\u30ea\u30f3\u30b0\u306e\u8a08\u7b97\u306b\u5931\u6557\u3057\u307e\u3057\u305f<\/h3>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa<\/strong>:
- \u30a2\u30ec\u30a4\uff1a4\u30b9\u30c8\u30ea\u30f3\u30b0\u3001\u5404I_sc = 10A
- \u5404\u30b9\u30c8\u30ea\u30f3\u30b0\u30fb\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u8a2d\u8a08\u8005\u306e\u30b5\u30a4\u30ba10A \u00d7 1.56 = 16A
- \u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab\u30fc\uff1a\u540c\u3058\u304f16A\u274c\u3002<\/p>\n\n\n\n
\u554f\u984c\u70b9<\/strong>:
- \u8907\u5408\u96fb\u6d41\uff1a4\u00d710A\uff1d40A
- \u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab\u306f\u3001(4 \u00d7 10A \u00d7 1.25) \/ 0.8 = 62.5A \u3068\u3059\u308b\u3002 63A<\/strong><\/p>\n\n\n\n
\u8a02\u6b63<\/strong>:
- \u30b9\u30c8\u30ea\u30f3\u30b0\u30d6\u30ec\u30fc\u30ab\u30fc\u540416A\uff08\u6b63\u3057\u3044\uff09
- \u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab\u30fc\uff1a63A\u307e\u305f\u306f80A<\/p>\n\n\n\n
\u30ec\u30c3\u30b9\u30f3<\/strong>:\u30b9\u30c8\u30ea\u30f3\u30b0\u30ec\u30d9\u30eb\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3068\u30a2\u30ec\u30a4\u30ec\u30d9\u30eb\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3067\u306f\u8a08\u7b97\u5f0f\u304c\u7570\u306a\u308b\u3002.<\/p>\n\n\n\n
\"\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u9069\u5207\u306a\u30b5\u30a4\u30b8\u30f3\u30b0\u3068\u4e0d\u9069\u5207\u306a\u30b5\u30a4\u30b8\u30f3\u30b0\u306e\u6bd4\u8f03\uff08\u30b5\u30a4\u30ba\u306e\u5c0f\u3055\u3044\u96fb\u7dda\u3084\u30b5\u30a4\u30ba\u306e\u5927\u304d\u3044\u30d6\u30ec\u30fc\u30ab\u30fc\u306b\u3088\u308b\u96fb\u7dda\u306e\u640d\u50b7\u3084\u904e\u71b1\u3001\u706b\u707d\u306e\u5371\u967a\u6027\u3092\u542b\u3080\"\/<\/figure>\n\n\n\n
\u9ad8\u5ea6\u306a\u30b5\u30a4\u30b8\u30f3\u30b0\u30fb\u30b7\u30ca\u30ea\u30aa<\/h2>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa1\uff1a\u30b3\u30f3\u30d0\u30a4\u30ca\u30fc\u5185\u306e\u6df7\u5408\u30b9\u30c8\u30ea\u30f3\u30b0\u96fb\u6d41<\/h3>\n\n\n\n
\u30b7\u30b9\u30c6\u30e0<\/strong>:
- 3\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u5404I_sc = 11A
- 2\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9\u5404I_sc = 9A\uff08\u7570\u306a\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u30bf\u30a4\u30d7\uff09<\/p>\n\n\n\n
\u500b\u5225\u30b9\u30c8\u30ea\u30f3\u30b0\u30fb\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong>:
- 11A\u30b9\u30c8\u30ea\u30f3\u30b0\u30b911a\u00d71.56\uff1d17.2a\u306e\u5834\u5408\u3002 20A\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong>
- 9A\u30b9\u30c8\u30ea\u30f3\u30b0\u30b99a \u00d7 1.56 = 14.0a \u2192 9A\u30b9\u30c8\u30ea\u30f3\u30b0\u30b9 16A\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong><\/p>\n\n\n\n
\u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong>:
\u5408\u8a08\uff1a\uff083\u00d711A\uff0b2\u00d79A\uff09\u00d71.25\u00f70.8\uff1d82.8A\u2192\uff083\u00d711A\uff0b2\u00d79A 100A\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong><\/p>\n\n\n\n
\u30ef\u30a4\u30e4\u30fc\u30b5\u30a4\u30b8\u30f3\u30b0<\/strong>:
- 20A\u306e\u30b9\u30c8\u30ea\u30f3\u30b0\u914d\u7dda\uff1a\u6700\u5c0f8AWG\uff0823.2A\u8efd\u6e1b\uff09
- 16A\u306e\u30b9\u30c8\u30ea\u30f3\u30b0\u914d\u7dda\uff1a\u96fb\u5727\u964d\u4e0b\u306b\u554f\u984c\u304c\u306a\u3051\u308c\u3070\u300110AWG\u3067\u3082\u53ef(17.4A\u8efd\u6e1b)
- \u30e1\u30a4\u30f3\u30d0\u30b9: 2 AWG (60\u2103\u3067115A\u8efd\u6e1b)<\/p>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa2\uff1a\u5145\u653e\u96fb\u304c\u975e\u5bfe\u79f0\u306a\u30d0\u30c3\u30c6\u30ea\u30fc\u30b7\u30b9\u30c6\u30e0<\/h3>\n\n\n\n
\u30d0\u30c3\u30c6\u30ea\u30fc\u30d0\u30f3\u30af<\/strong>:
- \u96fb\u5727\uff1a\u516c\u79f048V
- \u6700\u5927\u653e\u96fb\uff1a\u9023\u7d9a200A\u3001\u30d4\u30fc\u30af400A\uff0810\u79d2\u9593\uff09
- \u6700\u5927\u5145\u96fb\uff1a\u9023\u7d9a100A<\/p>\n\n\n\n
\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u9078\u629e<\/strong>:<\/p>\n\n\n\n
\u653e\u96fb\u4fdd\u8b77<\/strong>:
- \u9023\u7d9a\uff1a200A\u00d71.25\uff1d250A
- \u30d4\u30fc\u30af400A\u309210\u79d2\u9593\u8a31\u5bb9
- \u9078\u629e\u3059\u308b\uff1a 250A\u307e\u305f\u306f315A C\u30ab\u30fc\u30d6<\/strong>
- C\u30ab\u30fc\u30d6\u78c1\u6c17\uff1a1250\uff5e2500A\uff08\u30d4\u30fc\u30af400A\u306f\u30c8\u30ea\u30c3\u30d7\u3057\u306a\u3044\uff09<\/p>\n\n\n\n
\u5145\u96fb\u4fdd\u8b77<\/strong> (\u5225\u306e\u5834\u5408\uff09\uff1a
- \u9023\u7d9a\uff1a100A\u00d71.25\uff1d125A
- \u9078\u629e\u3059\u308b\uff1a 125A C\u30ab\u30fc\u30d6<\/strong><\/p>\n\n\n\n
\u53cc\u65b9\u5411\u56de\u8def<\/strong> (ESS\u3067\u306f\u4e00\u822c\u7684\uff09\uff1a
- \u3088\u308a\u9ad8\u3044\u5b9a\u683c\u3092\u4f7f\u7528\uff1a250A\u307e\u305f\u306f315A
- \u5145\u96fb\u3068\u653e\u96fb\u306e\u4e21\u65b9\u306b\u5bfe\u5fdc\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044
- \u30a4\u30f3\u30d0\u30fc\u30bf\u30fc\/\u5145\u96fb\u5668\u304c\u904e\u6e21\u96fb\u6d41\u3092\u767a\u751f\u3057\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d >\u78c1\u6c17\u30c8\u30ea\u30c3\u30d7<\/p>\n\n\n\n
\u30b7\u30ca\u30ea\u30aa3\uff1aDC\u30de\u30a4\u30af\u30ed\u30b0\u30ea\u30c3\u30c9\u306e\u30d0\u30b9\u4fdd\u8b77<\/h3>\n\n\n\n
\u30d0\u30b9\u69cb\u6210<\/strong>:
- \u8907\u6570\u306e\u96fb\u6e90\uff1a50kW\u30bd\u30fc\u30e9\u30fc\u300130kW\u30d0\u30c3\u30c6\u30ea\u30fc\u300120kW\u30b8\u30a7\u30cd\u30bb\u30c3\u30c8
- \u8907\u6570\u306e\u8ca0\u8377\uff1a40kW\u7a7a\u8abf\u300130kW\u88fd\u9020\u300120kW\u7167\u660e
- \u30d0\u30b9\u96fb\u5727\uff1aDC400V<\/p>\n\n\n\n
\u30d0\u30b9\u96fb\u6d41\u8a08\u7b97<\/strong>:
\u6700\u5927\u30bd\u30fc\u30b9\uff1a50kW + 30kW + 20kW = 100kW
I_bus = 100,000W \/ 400V = 250A<\/p>\n\n\n\n
\u30e1\u30a4\u30f3\u30d0\u30b9\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong>:
I_breaker = 250A \u00d7 1.25 = 312.5A \u2192 I_breaker = 250A \u00d7 1.25 = 312.5A 400A\u30d6\u30ec\u30fc\u30ab\u30fc<\/strong><\/p>\n\n\n\n
\u9078\u629e\u6027\u306e\u8003\u616e<\/strong>:
- \u30bd\u30fc\u30b9\u30d6\u30ec\u30fc\u30ab\u30fc100-200A\u306e\u7bc4\u56f2
- \u30ed\u30fc\u30c9\u30d6\u30ec\u30fc\u30ab\u30fc50-100A\u30ec\u30f3\u30b8
- \u30e1\u30a4\u30f3\u30d0\u30b9\u30d6\u30ec\u30fc\u30ab\u30fc400A
- \u5354\u8abf\u306e\u78ba\u4fdd\uff1a\u30e1\u30a4\u30f3\u30d6\u30ec\u30fc\u30ab\u30fc\u3088\u308a\u5148\u306b\u5c0f\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u843d\u3061\u308b<\/p>\n\n\n\n
\"\u5305\u62ec\u7684\u306a\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30ba\u6c7a\u5b9a\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\uff1a\u592a\u967d\u5149\u767a\u96fb\u30d0\u30c3\u30c6\u30ea\u30fc\u30e2\u30fc\u30bf\u30fc\u304a\u3088\u3073\u4e00\u822c\u7684\u306a\u76f4\u6d41\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30ab\u30d0\u30fc\u3001NEC\u8a08\u7b97\u306b\u3088\u308b\u30ef\u30a4\u30e4\u30fc\u30a2\u30f3\u30d7\u30ad\u30e3\u30d1\u30b7\u30c6\u30a3\u691c\u8a3c\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u9078\u629e\u304a\u3088\u3073\u8abf\u6574\u30c1\u30a7\u30c3\u30af\u4ed8\u304d\"\/<\/figure>\n\n\n\n
\u3088\u304f\u3042\u308b\u8cea\u554f\uff08\u30b5\u30a4\u30ba\u30fb\u30d5\u30a9\u30fc\u30ab\u30b9\uff09<\/h2>\n\n\n\n
\u306a\u305cNEC690.8\u3067\u306f\u3001\u6a19\u6e96\u7684\u306a1.25\u3067\u306f\u306a\u304f1.56\u500d\u306a\u306e\u3067\u3059\u304b\uff1f<\/h3>\n\n\n\n
NEC 690.8\u306f\u30012\u3064\u306e\u7570\u306a\u308b\u6761\u4ef6\u3092\u8003\u616e\u3057\u3066\u3044\u308b\u3002(1) \u592a\u967d\u653e\u5c04\u7167\u5ea6\u306f\u3001\u96f2\u306e\u7e01\u306e\u52b9\u679c\u3084\u53cd\u5c04\u653e\u5c04\u306b\u3088\u308aSTC\u309225%\u8d85\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u30e2\u30b8\u30e5\u30fc\u30ebI_sc\u3092\u6bd4\u4f8b\u3057\u3066\u5897\u52a0\u3055\u305b\u308b\u3001(2) \u592a\u967d\u767a\u96fb\u306f\u9023\u7d9a\u7684\u3067\u3042\u308a(3\u6642\u9593\u4ee5\u4e0a)\u3001NEC 210.20(A)\u306b\u3088\u308a125%\u306e\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002\u3053\u308c\u3089\u306f\u4e57\u7b97\u3059\u308b\uff1a1.25 \u00d7 1.25 = 1.5625 \u2248 1.56.\u3053\u308c\u306f\u30c0\u30d6\u30eb\u30ab\u30a6\u30f3\u30c8\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u7b2c\u4e00\u306e\u8981\u56e0\u306f\u74b0\u5883\uff08\u5b9f\u969b\u306e\u96fb\u6d41\u5897\u52a0\uff09\u3067\u3042\u308a\u3001\u7b2c\u4e8c\u306e\u8981\u56e0\u306f\u96fb\u6c17\u898f\u683c\u8981\u4ef6\uff08\u30d6\u30ec\u30fc\u30ab\u306e\u71b1\u7ba1\u7406\uff09\u3067\u3059\u30021.25\u00d7\u306e\u307f\u3092\u4f7f\u7528\u3059\u308b\u3068\u300125%\u306e\u4fdd\u8b77\u304c\u904e\u5c0f\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n
\u30ef\u30a4\u30e4\u30fc\u306e\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u5834\u5408\u3001\u3088\u308a\u5c0f\u3055\u306a\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n
No-NEC 690.8\u306f\u3001\u96fb\u7dda\u30b5\u30a4\u30ba\u306b\u95a2\u4fc2\u306a\u304f\u3001\u592a\u967d\u96fb\u6c60\u30a2\u30ec\u30a4\u306eI_sc\u306b\u57fa\u3065\u304f\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306e\u6700\u5c0f\u5b9a\u683c\u3092\u5b9a\u3081\u3066\u3044\u308b\u3002I_sc\u00d71.56\u672a\u6e80\u306b\u30d6\u30ec\u30fc\u30ab\u3092\u904e\u5c0f\u8a55\u4fa1\u3059\u308b\u3068\u3001\u901a\u5e38\u306e\u9ad8\u7167\u5ea6\u6761\u4ef6\u4e0b\uff08\u96f2\u304c\u591a\u3044\u771f\u590f\uff09\u3067\u30d6\u30ec\u30fc\u30ab\u304c\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\u96fb\u7dda\u306e\u30b5\u30a4\u30ba\u3092\u5927\u304d\u304f\u3059\u308b\u3068\u3001\u96fb\u5727\u964d\u4e0b\u306e\u4f4e\u6e1b\u3068\u5c06\u6765\u306e\u62e1\u5f35\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u30d6\u30ec\u30fc\u30ab\u306e\u5c0f\u578b\u5316\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u4f8bI_sc = 10A\u306e\u5834\u5408\u30016AWG\u30ef\u30a4\u30e4\uff08\u5bb9\u91cf65A\uff09\u3092\u53d6\u308a\u4ed8\u3051\u305f\u3068\u3057\u3066\u3082\u3001\u6700\u4f4e16A\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u5fc5\u8981\u3002\u30d6\u30ec\u30fc\u30ab\u306f\u3001\u96fb\u7dda\u5bb9\u91cf\u3067\u306f\u306a\u304f\u3001\u30a2\u30ec\u30a4\u306e\u6700\u5927\u51fa\u529b\u306b\u5bfe\u3057\u3066\u4fdd\u8b77\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n
\u30b5\u30fc\u30b8\u96fb\u6d41\u3092\u4f34\u3046\u30d0\u30c3\u30c6\u30ea\u30fc\u30fb\u30b7\u30b9\u30c6\u30e0\u7528\u306e\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30fb\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u30b5\u30a4\u30ba\u306f\uff1f<\/h3>\n\n\n\n
\u30d0\u30c3\u30c6\u30ea\u306f\u3001\u653e\u96fb\/\u5145\u96fb\u306e\u79fb\u884c\u6642\u306b\u9023\u7d9a\u5b9a\u683c\u306e 2\uff5e5 \u500d\u306e\u30b5\u30fc\u30b8\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u9023\u7d9a\u5b9a\u683c\uff08I_cont \u00d7 1.25\uff09\u306b\u5408\u308f\u305b\u3066\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30ba\u3092\u6c7a\u3081\u3001\u30c8\u30ea\u30c3\u30d7\u66f2\u7dda\u304c\u30b5\u30fc\u30b8\u306b\u8010\u3048\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\uff1a5-10\u00d7 In \u306e C \u30ab\u30fc\u30d6\u78c1\u6c17\u30c8\u30ea\u30c3\u30d7\u306f\u3001\u307b\u3068\u3093\u3069\u306e\u30d0\u30c3\u30c6\u30ea\u904e\u6e21\u73fe\u8c61\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002\u4f8b\uff1a\u9023\u7d9a 100A\u3001\u30b5\u30fc\u30b8 250A\uff0810 \u79d2\uff09\uff1a125A C \u30ab\u30fc\u30d6\uff08\u78c1\u6c17 625-1250A\uff09\u3092\u9078\u629e\u3002\u30b5\u30fc\u30b8\u304c\u8ff7\u60d1\u306a\u30c8\u30ea\u30c3\u30d7\u3092\u5f15\u304d\u8d77\u3053\u3059\u5834\u5408\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a(1)D\u30ab\u30fc\u30d6\u30d6\u30ec\u30fc\u30ab\u3001(2)\u30d7\u30ed\u30b0\u30e9\u30e0\u53ef\u80fd\u306aI\u00b2t\u7279\u6027\u3092\u6301\u3064\u96fb\u5b50\u30d6\u30ec\u30fc\u30ab\u3001(3)\u30b3\u30f3\u30bf\u30af\u30bf\u3067\u30b5\u30fc\u30b8\u7d4c\u8def\u3092\u5206\u96e2\u3002\u30d6\u30ec\u30fc\u30ab\u3092\u5358\u7d14\u306b\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30ba\u306b\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
\u8a08\u7b97\u3055\u308c\u305f\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30ba\u304c\u6a19\u6e96\u5b9a\u683c\u306e\u9593\u306b\u3042\u308b\u5834\u5408\u306f\uff1f<\/h3>\n\n\n\n
\u5e38\u306b\u6b21\u306e\u6a19\u6e96\u5b9a\u683c\u306b\u5207\u308a\u4e0a\u3052\u308b\u3002\u8a08\u7b97\u304c17.5A\u3067\u3001\u6a19\u6e96\u304c16A\/20A\u306e\u5834\u5408\u306f\u300120A\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u96fb\u7dda\u306e\u8010\u529b\u304c\u4e0d\u8db3\u3059\u308b\u5834\u5408\u306f\u3001\u96fb\u7dda\u306e\u30b5\u30a4\u30ba\u3092\u5927\u304d\u304f\u3057\u307e\u3059\uff08\u30d6\u30ec\u30fc\u30ab\u306e\u30b5\u30a4\u30ba\u3092\u5c0f\u3055\u304f\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\uff09\u3002\u4f8b\uff1a17.5A\u3067\u8a08\u7b97\u3057\u305f\u5834\u5408\u300110AWG\u30ef\u30a4\u30e4\uff0817.4A\u3067\u8efd\u6e1b\uff09\u306f20A\u30d6\u30ec\u30fc\u30ab\u306b\u306f\u4e0d\u5341\u5206\u3067\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\uff1a(1) 20A \u30d6\u30ec\u30fc\u30ab\u3067 8 AWG (23.2A \u8efd\u6e1b) \u306b\u30b5\u30a4\u30ba\u30a2\u30c3\u30d7\u3059\u308b\u3001(2) \u30b3\u30fc\u30c9\u8a08\u7b97\u3067 16A \u2265 I_min \u306e\u5834\u5408\u306e\u307f 16A \u30d6\u30ec\u30fc\u30ab\u3092\u4f7f\u7528\u3059\u308b\u3002\u898f\u683c\u5916\u306e\u5b9a\u683c\u3092\u4f7f\u7528\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
\u9ad8\u5ea6\u306f\u96fb\u6d41\u5b9a\u683c\u306e\u9078\u629e\u306b\u3069\u306e\u3088\u3046\u306b\u5f71\u97ff\u3057\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n
\u9ad8\u5ea6\u306f\u4e3b\u306b\u5b9a\u683c\u96fb\u5727\u306b\u5f71\u97ff\u3057\uff08\u7d76\u7e01\u8010\u529b\u304c\u4f4e\u4e0b\u3059\u308b\uff09\u3001\u5b9a\u683c\u96fb\u6d41\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002\u5b9a\u683c\u96fb\u6d41\u306f\u71b1\u7ba1\u7406\uff08I\u00b2R\u52a0\u71b1\uff09\u306b\u95a2\u4fc2\u3057\u30012000m\u4ee5\u4e0b\u306e\u9ad8\u5ea6\u3067\u306f\u307b\u3068\u3093\u3069\u5f71\u97ff\u3092\u53d7\u3051\u306a\u3044\u30022000m\u4ee5\u4e0a\u3067\u306f\u3001\u7a7a\u6c17\u5bc6\u5ea6\u306e\u4f4e\u4e0b\u306b\u3088\u308a\u5bfe\u6d41\u51b7\u5374\u304c\u308f\u305a\u304b\u306b\u6e1b\u5c11\u3057\u307e\u3059\u304c\u3001NEC\u306f\u9ad8\u5ea6\u306b\u3088\u308b\u96fb\u6d41\u8efd\u6e1b\u3092\u8981\u6c42\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u4e00\u90e8\u306e\u30e1\u30fc\u30ab\u30fc\u306f\u30012000m\u3092\u8d85\u3048\u308b\u30681000m\u3042\u305f\u308a1-3%\u306e\u96fb\u6d41\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u304c\u3001\u3053\u308c\u306f\u4fdd\u5b88\u7684\u3067\u3042\u308b\u3002\u96fb\u5727\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\uff082000m\u4ee5\u4e0a1000m\u3042\u305f\u308a10%\uff09\u306e\u65b9\u304c\u306f\u308b\u304b\u306b\u91cd\u8981\u3067\u3059\u3002\u9ad8\u5ea6\u306e\u88dc\u6b63\u306f\u30a2\u30f3\u30da\u30a2\u6570\u3067\u306f\u306a\u304f\u96fb\u5727\u306e\u4ed5\u69d8\u306b\u91cd\u70b9\u3092\u7f6e\u3044\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
1\u3064\u306e\u76f4\u6d41\u96fb\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u3067\u3001\u96fb\u6d41\u8981\u4ef6\u306e\u7570\u306a\u308b\u8907\u6570\u306e\u8ca0\u8377\u3092\u4fdd\u8b77\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n\n\n\n
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\u7d50\u8ad6<\/h2>\n\n\n\n
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NEC\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9<\/strong>:\u592a\u967d\u5149\u767a\u96fb\u7528\u9014\u3067\u306f\u3001\u9ad8\u7167\u5ea6\u3068\u9023\u7d9a\u904b\u8ee2\u3092\u8003\u616e\u3057\u3066 1.56 \u500d\uff08NEC690.8\uff09\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3002\u30a2\u30ec\u30a4\u30ec\u30d9\u30eb\u30d6\u30ec\u30fc\u30ab\u306f\uff08N\u00d7I_sc\u00d71.25\uff09\/0.8\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3002\u30d0\u30c3\u30c6\u30ea\u304a\u3088\u3073\u30e2\u30fc\u30bf\u306e\u7528\u9014\u306f\u3001\u305d\u308c\u305e\u308c\u306e NEC \u6761\u9805\uff08480\u3001430\uff09\u306b\u5f93\u3046\u3002\u5404\u8ca0\u8377\u30bf\u30a4\u30d7\u306b\u306f\u56fa\u6709\u306e\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n
\u6e29\u5ea6\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>:30\u2103\u3067\u306e\u96fb\u7dda\u8010\u529b\u306f\u5b9f\u969b\u306e\u8a2d\u7f6e\u6e29\u5ea6\u306b\u5408\u308f\u305b\u3066\u88dc\u6b63\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff08NEC\u8868310.15(B)(2)(a)\uff09\u3002\u5c4b\u4e0a\u306e\u96fb\u7dda\u7ba1\u306f\u4e00\u822c\u7684\u306b60\u301c70\u2103\u306b\u9054\u3059\u308b\u305f\u3081\u3001\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf42-58%\u306f\u6e1b\u5c11\u3059\u308b\u3002\u30d6\u30ec\u30fc\u30ab\u5b9a\u683c\u306f\u3001\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u305f\u30ef\u30a4\u30e4\u306e\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\u3092\u6c7a\u3057\u3066\u8d85\u3048\u3066\u306f\u306a\u3089\u306a\u3044-\u3053\u308c\u306f\u8b72\u308c\u306a\u3044\u706b\u707d\u5b89\u5168\u8981\u4ef6\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n
\u30ed\u30fc\u30c9\u30fb\u30de\u30c3\u30c1\u30f3\u30b0<\/strong>:\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u9078\u629e\u306f\u8ca0\u8377\u306e\u7a81\u5165\u7279\u6027\u306b\u5bfe\u5fdc\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u62b5\u6297\u8ca0\u8377\u306f B \u30ab\u30fc\u30d6\u3092\u4f7f\u7528\u3057\u3001\u592a\u967d\u5149\u767a\u96fb\u306f C \u30ab\u30fc\u30d6\u3092\u6a19\u6e96\u3068\u3057\u3001\u30e2\u30fc\u30bf\u30fc\u306f\u59cb\u52d5\u96fb\u6d41\u8a31\u5bb9\u306e\u305f\u3081\u306b D \u30ab\u30fc\u30d6\u3092\u5fc5\u8981\u3068\u3059\u308b\u3002\u5bb9\u91cf\u6027\u8ca0\u8377\u306b\u306f\u3001\u30d7\u30ea\u30c1\u30e3\u30fc\u30b8\u56de\u8def\u307e\u305f\u306f\u7279\u6b8a\u306a\u4fdd\u8b77\u304c\u5fc5\u8981\u3067\u3059\u3002\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30ba\u306e\u30d6\u30ec\u30fc\u30ab\u3060\u3051\u3067\u306f\u7a81\u5165\u96fb\u6d41\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n
\u30ef\u30a4\u30e4\u30fc\u4fdd\u8b77\u306e\u512a\u5148\u9806\u4f4d<\/strong>:\u30d6\u30ec\u30fc\u30ab\u306f\u3001\u71b1\u306b\u3088\u308b\u640d\u50b7\u304b\u3089\u5c0e\u4f53\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u5b58\u5728\u3059\u308b\u3002\u3059\u3079\u3066\u306e\u8a08\u7b97\u306f\u3001\u30d6\u30ec\u30fc\u30ab\u5b9a\u683c\u2266\u3059\u3079\u3066\u306e\u8efd\u6e1b\u8981\u56e0\u5f8c\u306e\u96fb\u7dda\u5bb9\u91cf\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u898f\u5b9a\u306e\u6700\u5c0f\u30d6\u30ec\u30fc\u30ab\u30b5\u30a4\u30ba\u3068\u96fb\u7dda\u5bb9\u91cf\u306e\u9593\u306b\u77db\u76fe\u304c\u751f\u3058\u305f\u5834\u5408\u306f\u3001\u96fb\u7dda\u306e\u30b5\u30a4\u30ba\u3092\u5927\u304d\u304f\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
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\u95a2\u9023\u3059\u308b\u30b5\u30a4\u30b8\u30f3\u30b0\u30fb\u30ea\u30bd\u30fc\u30b9<\/strong>
- \u76f4\u6d41\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u9078\u629e<\/a> - \u5305\u62ec\u7684\u306a\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u4ed5\u69d8
- \u76f4\u6d41\u96fb\u5727\u5b9a\u683c\u30ac\u30a4\u30c9<\/a> - \u96fb\u5727\u4ed5\u69d8\u306e\u65b9\u6cd5\u8ad6
- \u30bd\u30fc\u30e9\u30fc\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08<\/a> - \u5b8c\u5168\u306aPV\u4fdd\u8b77\u8a2d\u8a08<\/p>\n\n\n\n
\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30fb\u30b3\u30f3\u30b5\u30eb\u30c6\u30fc\u30b7\u30e7\u30f3\uff1a<\/strong> SYNODE\u306f\u3001\u8907\u96d1\u306aDC\u30b7\u30b9\u30c6\u30e0\u306e\u5b9a\u683c\u96fb\u6d41\u89e3\u6790\u304a\u3088\u3073\u8ca0\u8377\u8abf\u67fb\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u30de\u30eb\u30c1\u30bd\u30fc\u30b9\u30b3\u30fc\u30c7\u30a3\u30cd\u30fc\u30b7\u30e7\u30f3\u8abf\u67fb\u3001\u30ab\u30b9\u30bf\u30e0\u30c8\u30ea\u30c3\u30d7\u30ab\u30fc\u30d6\u306e\u9078\u629e\u3001\u5546\u7528\u8a2d\u5099\u306eNEC\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u691c\u8a3c\u306b\u3064\u3044\u3066\u306f\u3001\u5f53\u793e\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30c1\u30fc\u30e0\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002.<\/p>\n\n\n\n
\u6700\u7d42\u66f4\u65b0\u65e5<\/strong> 2025\u5e7410\u6708
\u8457\u8005<\/strong> SYNODE\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30fb\u30c1\u30fc\u30e0
\u30c6\u30af\u30cb\u30ab\u30eb\u30fb\u30ec\u30d3\u30e5\u30fc<\/strong> \u8a8d\u5b9a\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u30fb\u30a8\u30f3\u30b8\u30cb\u30a2\u3001NABCEP\u8a8d\u5b9a\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8
\u30b3\u30fc\u30c9\u53c2\u7167\uff1a<\/strong> NEC690:2023\u6761\u3001NEC240:2023\u6761\u3001NEC310:2023\u6761<\/p>","protected":false},"excerpt":{"rendered":"
Introduction Selecting the correct DC current circuit breaker amperage rating is a precise engineering calculation\u2014too small and nuisance tripping disrupts operations, too large and wires overheat before protection activates. Unlike voltage ratings where oversizing provides safety margin, current ratings must match the specific load and wire capacity within tight tolerances. This sizing-focused guide provides electrical designers and system engineers with comprehensive methodology for DC current circuit breaker selection. We cover NEC Article 690 solar calculations, continuous load derating factors, wire ampacity verification, load type considerations, and the critical distinctions between overload and short-circuit protection requirements. For professionals designing solar PV systems, battery energy storage, DC microgrids, or industrial DC distribution, […]<\/p>\n","protected":false},"author":1,"featured_media":2093,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-2099","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dc-circuit-breaker-blog"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/posts\/2099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/comments?post=2099"}],"version-history":[{"count":2,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/posts\/2099\/revisions"}],"predecessor-version":[{"id":2158,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/posts\/2099\/revisions\/2158"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/media\/2093"}],"wp:attachment":[{"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/media?parent=2099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/categories?post=2099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sinobreaker.com\/ja\/wp-json\/wp\/v2\/tags?post=2099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}