I recently have been asked to install a battery charger that came along with a forklift purchase. It is a 480volt 1ph charger. It has terminals labled L1,N,G. The plant is wired 480v 3ph, with 277v for lighting, and 120v common outlets. How do I wire this thing??? I have no 480v neutral. Thanks!!!
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1\$\begingroup\$ L1 = Phase A, N = Phase B, G = Ground? Do you have a datasheet, wiring diagrams, or schematics for the charger? \$\endgroup\$– user199402Sep 17, 2019 at 18:54
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1\$\begingroup\$ Perhaps it may have been worth asking if they did a 3 phase charger... \$\endgroup\$– Solar MikeSep 17, 2019 at 19:05
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1\$\begingroup\$ This is a "look what we bought without asking you first" kinda deal. \$\endgroup\$– Paint MechanicSep 17, 2019 at 19:08
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1 Answer
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- Set all the charger tap changers to 480 V.
- Create a supply from two phases with a suitable 2-pole miniature circuit breaker. Note that the charger is only fused on the live so the external fusing is essential.
- Power the charger as shown in Table 1.
Table 1. Wiring connections.
Supply Charger
------ -------
L1 L
L2 N
L3 n/c
N n/c
PE PE
answered Sep 17, 2019 at 19:26
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\$\begingroup\$ Alright... I was hesitant about wiring a hot phase to the neutral terminal. \$\endgroup\$ Sep 17, 2019 at 19:45
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1\$\begingroup\$ If you look at that schematic, the "Neutral" only goes to two transformers, so it is electrically equivalent to the Line lead. \$\endgroup\$– rdtscSep 17, 2019 at 21:20
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\$\begingroup\$ yeah, and both L and N pass through the relay contacts, they could have labeled them L1 and L2 and saved a lot of confusion. \$\endgroup\$ Sep 18, 2019 at 10:21
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1\$\begingroup\$ @Jasen, not without putting a fuse on L2 to protect against a phase to frame short circuit. \$\endgroup\$ Sep 18, 2019 at 11:45