ABB

1.Main Functions

1. Three‑phase Overcurrent Protection Provide both Definite Time (DT) and Inverse Definite Minimum Time (IDMT) operating characteristics for phase‑to‑phase short‑circuit and overload faults. Include low‑set overcurrent stage for overload and high‑set instantaneous stage for severe short‑circuit. Support single‑phase, two‑phase or three‑phase protection configurations, connected to secondary current transformers (1 A / 5 A CT input). www.plcva.com
2. Earth‑Fault (Zero‑Sequence Current) Protection Integrated earth‑fault protection unit with low‑set and high‑set stages. Both definite‑time and IDMT curves are selectable. Designed for earth‑fault detection in solidly‑earthed, resistance‑earthed or impedance‑earthed MV distribution networks, detects neutral‑point unbalance and ground leakage faults.
3. Circuit‑Breaker Failure Protection (CBFP) Built‑in breaker failure logic. If the circuit breaker fails to open after receiving trip command, the relay will issue backup tripping signal to upstream breakers to isolate fault segments and expand fault clearance scope.

ABB SPAJ 140 C‑AA Combined Protection Relay, RS 611 006‑AA

1. Fault Recording, Local HMI & Self‑Supervision Front‑panel numerical display and push‑button keypad. Read / modify setting parameters, view real‑time measured currents, store and review historical fault records, fault codes and trip event logs. Continuous hardware & firmware self‑diagnosis monitors internal electronics, reports hardware failure via alarm contacts for predictive maintenance.More products: www.plcva.com
2. Multi‑contact Trip & Signal Outputs Multiple configurable relay output contacts: trip outputs for circuit‑breaker tripping, multi‑purpose signal contacts for remote alarm indication. Contacts support AC/DC 250 V working voltage for substation control circuit interface.
3. Serial Communication for Substation Automation SPA‑bus serial communication interface. Support parameter uploading/downloading, measured value transmission, event & fault data uploading to SCADA / distribution automation system. Settings can be configured locally via front panel or remotely through communication bus.
4. Wide‑range auxiliary power supply Auxiliary supply accepts 80‑265 V AC / DC, adapts to substation station battery and AC auxiliary power environment.

ABB SPAJ 140 C‑AA Combined Protection Relay, RS 611 006‑AA

2. Applications & Purpose

SPAJ 140 C‑AA belongs to ABB SPACOM distribution protection platform, applied in medium‑voltage power distribution systems (typically 3‑36 kV) for selective fault isolation of radial feeders.

ABB SPAJ 140 C‑AA Combined Protection Relay, RS 611 006‑AA

Typical application objects:

• MV radial outgoing feeders in utility substations and industrial power plants
• Backup protection for distribution transformers
• Backup protection for medium‑voltage motors and small‑size generators
• Indoor metal‑clad / metal‑enclosed switchgear panels

ABB SPAJ 140 C‑AA Combined Protection Relay, RS 611 006‑AA

Core operational purposes:

• Detect overload, phase‑to‑phase short‑circuit and earth‑fault defects; send trip command to circuit breaker to isolate faulty equipment or feeder rapidly and selectively
• Prevent equipment burnout, power grid damage and safety hazards caused by electrical faults
• Record fault data for post‑fault analysis and troubleshooting
• Provide alarm signals for remote monitoring in distribution automation system
• Implement breaker failure backup protection to improve overall power‑system reliability.

ABB SPAJ 140 C‑AA Combined Protection Relay, RS 611 006‑AA

Understand the lowest price, please contact via email: plcvarious@foxmail.com

More products: www.plcva.com

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