Model:EB144021SPER 1C1-AA

Manufacturer: ABB

Voltage of the circuit monitored: 40-265 V dc

Measuring current: 1.5 mA, typ.

Min. residual voltage over the circuit monitored: >40 V dc

Auxiliary supply voltage and current:

rated voltage Un:48/60/110/220 V dc

operation volt:40-265 V dc

Current drain, typ.:7 mA

The ABB EB144021SPER 1C1‑AA (commonly referred to as SPER 1C1‑AA Trip Circuit Supervision Relay) is a dedicated supervision relay manufactured by ABB for continuous monitoring of critical electrical control circuits in industrial and utility power systems. It is primarily used to ensure reliable performance and fault detection in trip and control circuits associated with circuit breakers, disconnect switches, and other key protection elements in electrical installations such as substations.

Frequently asked questions：

Q:What is a EB144021SPER 1C1-AA realy?

A:The Sper 1C1-AAJ is mechanically designed to suit the COMBIFLEX system. The relay supply voltage range is 40-265 V DC.

Q:How much current does a EB144021SPER 1C1-AA use?

A:The supervision relay can be connected to receive the supply voltage from the control circuit monitored, over the connection wires of the driver circuit. A condition, however, is that the control coil of the circuit monitored is not affected by the increased current consumption of about 7-16 mA, depending on the type of supervision relay, and that the residual voltage over the circuit monitored is above 40 V dc.

Q:In which applications is EB144021SPER 1C1-AA typically used?

A:It is used to supervise circuit breaker control circuits, disconnector control circuits, and signalling circuits in power installations and substations.

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