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PV Generation Systems Slide 7

The HE-S relay is a miniature high capacity 2FormA relay that features an auxiliary 1FormB contact to create a safety circuit. If either of the normally open contacts welds shut, the normally closed contact would remain in the open position which can be used as feedback to a failsafe mechanism. This can ultimately save space in the design by eliminating the need for extra relays that would normally be required for added redundancy. Similar to that of the LF-G and HE-V relays, the HE-S relay also saves on power consumption by using a low coil holding voltage.

PTM Published on: 2017-03-23