SPAU140C ABB SPACOM Series Datasheet & Technical Manual

ABB SPAU140C SPACOM Synchro-check and Voltage-check Relay

ABB SPAU140C SPACOM Synchro-check and Voltage-check Relay

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ABB SPAU140C SPACOM Series Synchro-check and Voltage-check Relay Configured for phase angle, frequency, and voltage difference monitoring in power distribution...

SKU: SPAU140C

Manufacturer: ABB
Product No.: SPAU140C
Product Type: Protective Relays
Product Origin: Switzerland
Payment:T/T, Western Union
Weight: 5400g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

ABB SPAU140C SPACOM Series Synchro-check and Voltage-check Relay

Configured for phase angle, frequency, and voltage difference monitoring in power distribution networks, the ABB SPAU140C (SPAU-140-C Numerical Synchro Relay) provides direct physical/electrical execution. This numerical hardware component acts as a verification interface between two separate AC power sources or busbars, generating a circuit breaker release signal only when measured electrical parameters fall within programmed synchronization tolerances.

Hardware Specifications

Parameter	Specification
Model	SPAU140C
Brand	ABB
Origin	Japan
Weight	1.5 kg net (Shipping weight: 5.4 kg)
Dimensions	220 mm x 150 mm x 60 mm
Operating Temp	-10 to +55 deg C
Power Consumption	Supported via auxiliary power supply: 80-265 V AC or 18-80 V DC
Part Number	SPAU-140-C
Relay Type	Numerical Synchro-check & Voltage-check
System Voltage Range	0.4 to 36 kV AC networks
Rated Voltage Input (Un)	100/110/220 V AC (via external Voltage Transformer)
Frequency Range	45 to 65 Hz (50/60 Hz nominal)
Phase Difference Setting	Adjustable 5 to 50 deg (1 deg resolution)
Trip Time	1 ms internal processing speed
Communication Port	RS-485 utilizing SPA bus protocol
Enclosure Protection	IP20 (Panel or Rack mounted)

Industrial Control & Drive Backplane Characteristics

The synchronization logic relies on high-speed sampling circuits that interact with the system architecture via integrated backplane bus communication velocity licences. To maintain stability across high-density systems, the relay executes voltage-check and synchro-check evaluations within a 1 ms processing window, preventing closing commands from being sent during transient grid frequency fluctuations. The unit guarantees firmware flash compatibility across legacy SPACOM networks and utilizes deterministic networks to transmit status data, alarm indicators, and measured vector parameters over the RS-485 SPA bus communication layer to centralized SCADA systems.

Frequently Asked Questions

Q: How does the relay execute a voltage-check under dead-bus or live-line conditions?

A: The SPAU140C contains dual-stage internal logic configurations. Users program distinct voltage thresholds to define "dead" and "live" states; the relay evaluates whether the incoming line is active while the busbar is unpowered (dead-bus/live-line) or vice versa, bypassing the phase-angle match requirement to allow safe energization of an inactive network segment.

Q: Can the internal synchronization release relay be hot-swapped while the primary breaker circuit is energized?

A: No, hot-swapping the internal processing module while the external breaker control loop is armed is prohibited. Unplugging the hardware under load can cause open-circuit conditions on associated current or voltage transformer inputs and may introduce unintended trip states or remove vital interlocking safety barriers from the closing circuit.

Q: What happens if the auxiliary power supply drops below the minimum specified voltage threshold?

A: If the auxiliary voltage falls below the internal hardware operational limits, an internal watchdog circuit drops out the self-supervision (IRF) relay. This immediately forces all synchronization output contacts to open, preventing any unsynchronized or unverified circuit breaker closure commands from being executed.

Field Installation Guidelines

Mount the relay housing securely within a cutout on the switchgear panel or inside a standard equipment rack slot, ensuring the IP20 enclosure is protected from conductive dust and moisture. Tighten all mounting brackets to eliminate low-frequency structural vibration near heavy circuit breakers. Connection to the primary AC network requires external voltage transformers (VTs) scaled to 100 V, 110 V, or 220 V nominal outputs. All VT secondary wiring and RS-485 communication lines must utilize twisted, fully shielded cables. Connect the shield drain wires exclusively to the main panel ground bus bar to neutralize electromagnetic interference and prevent ground loop circulating currents from distorting the micro-controller voltage measurements.

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