低压配电设计规范（GB50054—2011 1 总 则

1 GB50054 2011 11 1000V 2 prospectivetouchvoltage conventionalprospectivetouchvoltagelimit directcontact indirectcontact protectionagainstindirectcontact protectionagainstindirectcontact additionalprotection arm sreach enclosure protectivebarrier protectiveobstacle GB50054 2011 electricalsepation protectiveseparation extra-lowvoltage 50V SELV system PELV system FELV system equipotentialbonding protective-equipotential-bonding

2 Functional-equipotential-bonding mainequipotentialbonding supplementaryequipotentialbonding localequipotentialbonding earthfault conduit cabletray GB50054 2011 3 cablebrackets cableladder cablebrackets mobileequipment hand-heldequipment switchingdevice switchingdevice switch-disconnector deviceforisolation circuit-breaker mineralinsulatedcables GB50054 2011 43 1 2 3 4

3 5 6 1 TN-C 1 2 3 1 2 3 4 5 6 GB50054 2011 1 2 3 4 5 6 16A 1 TN-S 2 3 GB/Z6829 TT GB/T17045 II II IT 1 IT TT TN 2 TT 3 IT

4 IT 1 SELV PELV 250V GB50054 2011 62 SELV PELV 500V 500V 3 500V 1000V 1 2 3 4 5 m (mm2) 1016 2 6 16410 16 25610 GB50217 C 70- 90- -70 -105 GB50054 2011 7 5 523 GB50217.

5 5 C 5 C 70 C 5 1 2 16mm2 25mm2 1 16mm2 25mm2 2 16mm2 25mm2 3 4 GB50054 2011 8 4 5 % 0 15 33 10mm2, 16mm2 1 2 3 1 2 S--- mm2 I--- [ A ]

6 T--- s k--- S Itk GB50054 2011 9 mm2 16S12 Skk 16 35161216kk 3512Sk2k 1S- 2k1- 3k2- 3 1 16mm2 2 4mm2 16mm2 4 1 2 5 10mA 1 10mm2 16mm2 2 1 10mm2 16mm2 3 10mm2 4 1/2 GB50054 2011 10 mm2 625 16 25mm2 1 2 1/2 3 3 1 1/2 2

7 25mm2 25mm2 3 3 GB50054 2011 114 50mm, 200mm 2m 6m 2 15m IP GB4208 IP2X GB50054 2011 12 m 1.

8 2. 3. 4 5 IP GB4208 IP B IP2 7m 2 50mm

9 GB50054 2011 IP GB4208 IP3X GB50054 2011 145 I II 25V IP GB4208 IP B IP2 1 2