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ABB SPAJ140C Numerical Synchro-Check Relay

ABB SPAJ140C is a numerical synchro-check relay optimized for medium- and low-voltage applications. It continuously monitors electrical parameters including voltage magnitude, frequency, and phase angle differences, permitting breaker closure only when conditions meet preset thresholds.  

The SPAJ140C integrates synchro-check and voltage-check functions into a single device, offering dual-stage operation for flexible applications. With robust self-diagnostics, event recording, and SPA bus communication, it ensures secure and reliable operation in industrial and utility environments. The relay is widely deployed in power generation, substations, renewable energy systems, and critical infrastructure.

• Reliable Synchronization Control: Ensures breaker closing only under safe conditions.

• Dual Functional Design: Combines synchro-check and voltage-check in one device.

• Self-Diagnostics: Continuous monitoring for early fault detection.

• Easy Integration: SPA bus interface allows smooth connection with ABB automation systems.

• Versatile Applications: Supports generator synchronization, busbar coupling, and utility interconnection.

• Proven ABB Reliability: Designed for long-term operation in industrial and utility environments.

• Power Generation Plants

• Electrical Substations

• Industrial Power Systems

• Renewable Energy Installations

• Generator Synchronization Panels

• Busbar Coupling Systems

• Critical Infrastructure Power Networks

  
  

  
  

Q1: What is the primary function of ABB SPAJ140C?
A1: It verifies synchronization and voltage conditions before permitting circuit breaker closure.

Q2: Does it support both voltage and synchro-check functions?
A2: Yes, SPAJ140C integrates both functions in one device.

Q3: Can it be integrated with ABB SPA bus systems?
A3: Yes, it supports SPA bus communication for monitoring and automation.

Q4: What is the operating voltage range?
A4: The control voltage can be 18–265 V DC or 80–265 V AC.

Q5: Is SPAJ140C suitable for generator synchronization?
A5: Yes, it is widely used in generator synchronization and substation applications.

Q6: Does the relay include self-diagnostic features?
A6: Yes, it continuously monitors hardware and software for reliable operation.

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How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.