Mitsubishi Electric Power Products, Inc. BC43 Battery
Battery cabinets that are not supplied with an incorporated DC output disconnect device must have an appropriate disconnect device provided external to the cabinet.
For a standard substation DC battery rack, I am having trouble determining whether a ground is required to be installed along with the wires between the battery disconnect switch and the battery rack. It's 125VDC. My usual approach is to include a ground until I can prove that a ground is not useful or is detrimental to the system.
It's 125VDC. My usual approach is to include a ground until I can prove that a ground is not useful or is detrimental to the system. I have seen installations done both ways. 2/C with a ground and also 2 wires without a ground. When the ground is included, it is usually bonded right to the battery rack.
The ancillary equipment (charging units, etc) would be grounded. Grounding of DC battery system enhances safety really because, if ungrounded, any short of power conductor to battery system would not be cleared by OCPD and personnel doing routine maintenance on the batteries are liable to be shocked or to suffer worse than that.
PDF version includes complete article with source references.
Get technical specifications, application guides, and ROI analysis tools for containerized microgrid solutions, mobile energy storage containers, and portable power systems.
15 Industrialna Street, Włochy District
Warsaw, Poland 02-492
Sales & General: +48 22 824 4067
Technical Support: +48 607 809 270
Monday - Friday: 8:00 AM - 6:00 PM CET
Saturday: 8:00 AM - 2:00 PM CET