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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：

主要特點(diǎn)

1. 綜合保護(hù)功能：
• SPAJ140C型繼電器包括過電流元件和接地故障元件兩部分，提供全面的保護(hù)。
• 過電流元件可根據(jù)需要配置為單相、兩相或三相過流保護(hù)。
• 接地故障元件提供無方向性接地故障保護(hù)。
2. 高度靈活性：
• 繼電器具有靈活的跳閘和信號裝置，可根據(jù)具體的應(yīng)用需求進(jìn)行配置。
• 提供斷路器失靈保護(hù)功能，確保在斷路器拒動時(shí)能夠切除故障。
3. 動作原理：
• SPAJ140C是二次繼電器，連接在被保護(hù)饋線的電流互感器上。
• 三相過流元件和無方向接地故障元件連續(xù)地測量被保護(hù)饋線的相電流與零序電流。
• 在故障情況下，這些元件可根據(jù)所選擇的保護(hù)方式起動外部自動重合閘或使斷路器跳閘。
4. 性能要求：
• SPAJ140C在技術(shù)上需滿足選擇性、速動性、靈敏性和可靠性四個(gè)基本要求。
• 選擇性：確保僅將故障的設(shè)備或線路從電力系統(tǒng)中切除。
• 速動性：盡快地切除故障，減少設(shè)備和用戶的損失。
• 靈敏性：在規(guī)定的范圍內(nèi)，無論短路點(diǎn)的位置和類型，都能正確反應(yīng)動作。
• 可靠性：包括安全性和信賴性，確保在不需要?jiǎng)幼鲿r(shí)可靠不動作，在需要?jiǎng)幼鲿r(shí)可靠動作。
5. 應(yīng)用領(lǐng)域：
• SPAJ140C適用于饋線保護(hù)、變壓器保護(hù)以及后備保護(hù)等多種場景。
• 廣泛應(yīng)用于電廠、工業(yè)、鉆井平臺等領(lǐng)域。

技術(shù)和規(guī)格

• 保護(hù)功能：
• 三相定時(shí)限或反時(shí)限（IDMT）特性低定值過電流保護(hù)。
• 三相瞬時(shí)或定時(shí)限高定值過電流保護(hù)。
• 定時(shí)限或反時(shí)限（IDMT）特性低定值無方向性接地故障保護(hù)。
• 瞬時(shí)或定時(shí)限高定值無方向性接地故障保護(hù)。
• 其他特性：
• 可提供詳細(xì)的故障記錄和事件報(bào)告，方便故障分析和排查。
• 支持多種通信協(xié)議，方便與其他設(shè)備和系統(tǒng)集成。

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.