Scope of Application
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.
Advantages
01
The design, quality and rugged construction of the relay make it suitable for applications requiring high levels of reliability and dependability. The high IP degree guarantees reliable operation over a wide temperature range, even under extreme environmental conditions. The relay has been tested in accordance with IEC, IEEE standards.
Technical Features
Type | Function |
PRS-789-HA | Three Phase Trip circuit supervision |
PRS-789-HB | Single Phase trip circuit supervision |
PRS-789-HC | Trip relay &close relay with self-latching function |
PRS-789-HD | Lockout relay, repeat relay, high burden trip contact |
PRS-789-HE | Bi-stable relay, AC voltage switching relay |
PRS-789-HF | Self-Reset repeat tripping relay with single input |
PRS-789-HG | Self-Reset repeat tripping relay with double inputs |
Type | Application |
PRS-789-HA | mostly use for Three-Phase operation circuit breaker with one trip coil and one close coil |
PRS-789-HB | mostly use for Single-Phase (3 Segregated Phase) operation circuit breaker |
PRS-789-HC | mostly use for current operation circuit breaker |
PRS-789-HD | mostly use for lock-out close circuit after CB trip and initiating trip circuit |
PRS-789-HE | Mostly use forsignal selection or switching control |
PRS-789-HF | Used for relaying protection device to repeat tripping with single input |
PRS-789-HG | Used for relaying protection device to repeat tripping with double input |
