

ABB SPAJ140C 繼電保護(hù)裝置是一款功能強(qiáng)大的組合式過電流與接地故障繼電器,廣泛應(yīng)用于直接接地、電阻接地或阻抗接地電力系統(tǒng)中的輻射式饋線,提供有選擇性的短路和接地故障保護(hù)。以下是關(guān)于ABB SPAJ140C繼電保護(hù)裝置的詳細(xì)解析:

ABB SPAJ140C relay Protection is a powerful combined overcurrent and ground fault relay that is widely used in radiant feeders in direct, resistance or impedance grounded power systems to provide selective protection against short circuits and ground faults. The following is a detailed analysis of the ABB SPAJ140C relay protection device:
Main feature
Comprehensive protection function:
SPAJ140C relay includes overcurrent element and ground fault element to provide comprehensive protection.
The overcurrent element can be configured for single-phase, two-phase or three-phase overcurrent protection as required.
The ground fault element provides non-directional ground fault protection.
High flexibility:
Relays have flexible tripping and signaling devices that can be configured according to specific application requirements.
Provides circuit breaker failure protection to ensure that the fault can be removed when the circuit breaker refuses to operate.
Operation principle:
The SPAJ140C is a secondary relay connected to the current transformer in the protected feeder.
The three-phase overcurrent element and the directionless ground fault element continuously measure the phase current and zero sequence current of the protected feeder.
In case of failure, these elements can initiate an external automatic reclosing or trip the circuit breaker according to the selected protection mode.
Performance requirements:
The SPAJ140C technically needs to meet the four basic requirements of selectivity, quickness, sensitivity and reliability.
Selectivity: Ensure that only faulty devices or lines are removed from the power system.
Quick: Remove the fault as soon as possible to reduce the loss of equipment and users.
Sensitivity: Within the specified range, regardless of the position and type of short-circuit point, it can react correctly.
Reliability: including safety and reliability, to ensure that when no action is required, no action is reliable when it is required.
Application field:
The SPAJ140C is suitable for feeder protection, transformer protection, and backup protection.
Widely used in power plant, industry, drilling platform and other fields.
Technology and specification
Protection function:
Three-phase fixed or inverse time (IDMT) characteristic low fixed overcurrent protection.
Three-phase instantaneous or fixed time high fixed value overcurrent protection.
Fixed time or inverse time (IDMT) characteristic low fixed value non-directional ground fault protection.
Instantaneous or fixed time high fixed value non-directional ground fault protection.
Other features:
It can provide detailed fault records and event reports to facilitate fault analysis and troubleshooting.
Supports multiple communication protocols for easy integration with other devices and systems.
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