Alpha XR High reliability supervision relays

The Alpha XR Series Relays are low burden electro-mechanical supervision relays for application on high security tripping and auxiliary supply circuits. The Alpha XR relays have been designed to provide a balance of low burden to minimize the possibility of circuit breaker mal-operation while maintaining a minimum contact whetting current to avoid nuisance alarm conditions. A key feature of the design is a high visibility flag indicator that can only be reset under healthy supervision conditions. An optional green Healthy LED may also be specified. Failure of the circuit or supply being supervised will cause the main relay element to drop out, the flag to fall and the alarm contacts to change state. A wide voltage operating range and time delays ensures reliable operation. The XR range is packaged in a draw out case system and can be either flush panel or rack mounted.