Overview

The ABB SPAJ140C Combined Overcurrent and Earth-Fault Relay is a multifunctional protection device that integrates overcurrent and earth-fault detection into a single compact unit. Designed for use as a secondary relay with current transformers, the SPAJ140C continuously monitors both phase and neutral currents. Upon detection of unsafe conditions, it can trigger circuit breaker tripping, initiate auto-reclosing, sound alarms, and record faults, ensuring robust protection of electrical systems.

Functional Highlights

Engineered for reliability, the SPAJ140C features low-set stages (I> and I0>) that activate within approximately 60 ms, while high-set stages (I>> and I0>>) respond even more quickly at around 40 ms, facilitating rapid fault isolation. This quick response minimizes potential damage and system downtime.

Moreover, the relay provides flexible time-current characteristics with options for either definite time or inverse definite minimum time (IDMT) operation for both overcurrent and earth-fault detection. It offers six curve options, including four standardized curves (Normal, Very, Extremely, and Long-time inverse per BS 142/IEC 60255) in addition to specialized curves RI and RXIDG, allowing personalized coordination with other protective devices in diverse power systems.

Configurable output relays enable the SPAJ140C to deliver start signals for blocking co-protection relays and facilitate alarm signaling or auto-reclosing initiation. Additionally, an integrated binary input supports remote control functions, including stage blocking, manual resetting of latched relays, and dynamic setting group changes—enhancing adaptability within the system.

Technical Data

• Model Number: SPAJ140C
• Module Type: Combined Overcurrent and Earth-Fault Relay
• Manufacturer: ABB
• Condition: Brand New
• Weight: 3.2 kg
• Dimensions: 24 x 13.2 x 16 cm
• HS CODE: 8537101190
• Product Origin: Sweden
• Lead Time: In Stock
• Minimum Order Quantity (MOQ): 1
• Operating Voltage Range: 48-250 V AC/DC
• Response Times:
  • Low-set stages (I> and I0>): ~60 ms
  • High-set stages (I>> and I0>>): ~40 ms
• Output Relay Rating: 5A at 250V AC
• Operating Temperature Range: -25°C to +55°C

Typical Applications

The ABB SPAJ140C is ideal for:

• Feeder and motor protection in industrial power systems.
• Utility substations requiring intricate coordination for enhanced protection.
• Commercial electrical distribution systems where rapid response and reliable operation are critical.

FAQ

1. What is the weight of the SPAJ140C Relay?
   The SPAJ140C weighs 3.2 kg.

2. What are the dimensions of the SPAJ140C?
   Its dimensions are 24 x 13.2 x 16 cm.

3. What voltage range can the SPAJ140C operate within?
   It functions within a voltage range of 48-250V AC/DC.

4. How quickly can the SPAJ140C respond to current faults?
   Low-set stages respond in approximately 60 ms, while high-set stages respond in 40 ms.

5. What features enhance the flexibility of the SPAJ140C?
   It offers configurable output relays and an integrated binary input for remote control functions.