PRS-789-H Auxiliary Relay
PRS-789-H series auxiliary relays are mainly used with main protection and control devices. Each relay type is designed with a specific function such as TCS, trip and lockout.
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Busbar Protection
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Transformer Protection
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Transmission Line Protection
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Breaker Protection
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Feeder Protection
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Auxiliary Relay
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Merging Unit
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Digital Fault Recorder
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Power Stability Control System
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Power Generation Forecast
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Primary Frequency Controller
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Power Plant Controller
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Box Transformer Terminal Unit
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Centralized Control System
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Prefabricated Container
Product Presentation
PRS-789-H serial auxiliary relay mostly cooperates with main protection relay to achieve trip circuit supervision, from the positive supply to the negative supply whilst the circuit breaker is open or close status, and as well trip &close activation with self-adaption trip &close coil current, or lockout relay with bi-stable function.
Product Feature
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IP degree
Reliable operation over a wide temperature range.
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Performance
High levels of reliability and dependability.
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Power supply
Rated auxiliary voltage: 220V, 125V, 110V.
Technical Specifications
Mounting Way
Flush mounted
Merchanical size
(width×high×deepth)
40mm×173.5mm×231mm
Housing material
Aluminum
Protection class
Front: IP40
Rear: IP20
Other: IP30
PRS-789-HA
Three Phase Trip circuit supervision
Mostly use for Three-Phase operation circuit breaker with one trip coil and one close coil
PRS-789-HB
Single Phase trip circuit supervision
Mostly use for Single-Phase (3 Segregated Phase) operation circuit breaker
PRS-789-HC
Trip relay &close relay with self-latching function
Mostly use for current operation circuit breaker
PRS-789-HD
Lockout relay, repeat relay, high burden trip contact
Mostly use for lock-out close circuit after CB trip and initiating trip circuit
PRS-789-HE
Bi-stable relay, AC voltage switching relay
Mostly use for signal selection or switching control
PRS-789-HF
Self-Reset repeat tripping relay with single input
Used for relaying protection device to repeat tripping with single input
PRS-789-HG
Self-Reset repeat tripping relay with double inputs
Used for relaying protection device to repeat tripping with double input
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