SPAJ140C-AA 集成保护装置  过流和接地保护装置

SPAJ140C-AA  过流和接地保护装置

SPAJ140C-AA 提供选择性的辐射馈线短路保护以及接地故障保护。

在直接接地、电阻接地或阻抗接地电力系统中，过流和接地组合保护装置SPAJ 140 C提供选择性的馈线短路保护以及接地故障保护。

该集成保护装置包含一个过流保护单元和一个带跳闸和发信功能的接地保护单元。这类装置还可以用于其它需要单相，两相，或三相过流保护的应用。此外，该装置还包含一个断路器失灵保护单元。

为何选择ABB？

市场上最常使用的数字式保护继电器

易于使用的继电器，基本功能为过流和接地故障保护

成熟技术

过流和接地保护装置的区别如下：

作用不同 。SPAJ140C-AA 过流保护是用于保护电气设备，避免电路过载或短路造成设备损坏；接地装置是用于保护人身安全，避免触电危险。

原理不同 。SPAJ140C-AA 过流保护是通过检测电路中的电流变化，触发保护开关切断电源；接地装置是通过接地电阻将漏电电流引入地面，防止电流通过人体。

适用范围不同 。SPAJ140C-AA 过流保护适用于各种电气设备；接地装置适用于煤矿井下电气保护，保障工作人员的人身安全。

SPAJ140C-AA 集成保护装置  过流和接地保护装置

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.