Product Introduction

The ABB AV94a HESG440940R11 HESG216791A is a relay output board for ABB REG216 generator and transformer protection rack. It provides multi-channel isolated relay contacts for protection trip and alarm signal output. Featuring high reliable relay elements, contact surge suppression, galvanic isolation and built-in channel monitoring, it cooperates with REG216 processor and I/O boards for power plant generator, transformer and substation protection.

Content Details

ABB AV94a works as relay output module inside REG216 protection system rack. It receives protection command signals from main processor via backplane bus and drives hard relay contacts to send breaker trip and alarm signals. Each channel adopts independent relay design for high isolation and strong load capacity. Onboard circuit continuously monitors relay status and channel integrity, records fault logs for quick maintenance and reduces power system outage risk. It matches perfectly with 216VC62a processor,216EA62 analog input and 216DB61 binary input modules. Adopting pluggable rack-mounted design, the module has excellent EMC anti-interference performance and stable operation under heavy electrical noise and vibration in substation control cabinets. AV94a is mainly used as spare replacement for legacy ABB REG216 protection racks. Before shipment, each unit undergoes full functional test and thermal aging inspection to eliminate hidden defects and guarantee reliable long-term continuous operation.

Tags: AV94a HESG440940R11 HESG216791A ABB REG216 relay output module

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