SPAJ140C | Integrated protection device | DSAI133A 3BSE018290R1 | DSDP170 57160001-ADF

SPAJ140C-AA overcurrent and ground protection

TheSPAJ140C-AA  provides selective radiation feeder short-circuit protection and ground fault protection.

In direct, resistance or impedance grounded power systems, the combined overcurrent and ground protection SPAJ 140C provides selective feeder short-circuit protection and ground fault protection.

The integrated protection device includes an overcurrent protection unit and a ground protection unit with tripping and signaling functions. These devices can also be used in other applications that require single-phase, two-phase, or three-phase overcurrent protection. In addition, the device includes a circuit breaker failure protection unit.

Why choose ABB?

The most commonly used digital protective relay on the market

Easy to use relay, basic function is overcurrent and ground fault protection

Mature technology

The differences between overcurrent and ground protection devices are as follows:

The effect is different. SPAJ140C-AA overcurrent protection is used to protect electrical equipment from damage caused by circuit overload or short circuit. The grounding device is used to protect personal safety and avoid the danger of electric shock.

The principle is different. SPAJ 140C overcurrent protection is to detect the current change in the circuit and trigger the protection switch to cut off the power supply; The grounding device introduces the leakage current into the ground through the grounding resistance to prevent the current from passing through the human body.

The scope of application is different. SPAJ 140C overcurrent protection is suitable for all kinds of electrical equipment; The grounding device is suitable for underground electrical protection in coal mine to ensure the personal safety of staff.