The 6RJ25 is a high burden relay suitable for application in high security circuit breaker tripping circuits & in particular where the initiating contact may be remote from the relay. The high burden may also allow the satisfactory operation of external series elements.
The 6RJ25 has a high burden to provide immunity to capacitance discharge currents & power to the coil is cut off at operation or is economized to a low figure to provide thermal protection.
High burden tripping relays are designed to withstand the 10uF capacitor discharge test such that the relay will not operate when a 10uF capacitor charged to 120% of nominal operating voltage is applied across the coil of the relay.
The high speed relay coil is automatically protected from thermal damage by a series cut throat contact once the relay contacts have picked up & latched.
The contacts can be reset using the front panel reset push button or via the electrical reset input. The electrical reset coil is automatically protected from thermal damage by a series cut throat contact once the relay contacts have been reset.
The trip flag can only be reset via the independent front panel reset push button after the contacts have been reset. This feature allows the flag indication to be maintained as a record of trip operation even if the contacts have been electrically reset by remote control or by an auto reclose scheme.
The 6RJ23 version may be specified where the contacts & flag are reset simultaneously.
Alstom: MVAJ25, MVAJ055, MVAJ105