SPAU140C ABB | Voltage Measuring Relay for Medium-Voltage Systems
Manufacturer: ABB
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Part Number: SPAU140C
Condition：New with Original Package
Product Type: Voltage Measuring Relay for Medium-Voltage Systems
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Country of Origin: Sweden
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Overview
The ABB SPAU140C-AA RS488001-AA is a high-performance numerical synchro-check relay designed to protect networks when connecting separate voltage sources. It ensures safe closing of circuit breakers by monitoring voltage magnitude, phase angle, and frequency differences between two electrical systems.
This relay features dual independent measurement channels and microprocessor-based logic, providing precise assessments for permissive or blocking breaker signals. It supports both synchro-check and voltage-check functions, enabling safe connection of feeders, busbars, or other network sections.
The SPAU140C-AA operates with a wide auxiliary voltage range, works for both 50 Hz and 60 Hz networks, and is panel-mounted for easy installation. Its continuous self-diagnostic function ensures reliability in industrial and medium-voltage applications.
Technical Specifications
| Specification | Details |
|---|---|
| Model | SPAU140C-AA RS488001-AA |
| Function | Numerical synchro-check relay for breaker control |
| Measurement Channels | Dual independent channels |
| Frequency Range | 50 Hz / 60 Hz |
| Auxiliary Voltage | 80–265 V AC or 18–80 V DC |
| Voltage Inputs | Rated 100 V / 110 V |
| Synchronization Criteria | Voltage difference, phase angle difference, frequency deviation |
| Output Signals | Permissive or blocking signals for breaker closing |
| Communication Interface | RS-488 |
| Mounting Type | Panel-mounted |
| Operating Environment | Medium-voltage substations, industrial power systems |
| Application | Synchro-check and voltage-check functions |
| Self-Diagnostics | Continuous auto-supervision of hardware and software |
| Status | Discontinued by manufacturer, used/refurbished available |
FAQ
Q1: What is the primary purpose of the ABB SPAU140C?
A1: The SPAU140C ensures safe breaker closing by checking voltage, phase, and frequency synchronization between networks.
Q2: How many measurement channels does it have?
A2: It features dual independent measurement channels for accurate relay operation.
Q3: Which network frequencies are supported?
A3: Both 50 Hz and 60 Hz networks are supported.
Q4: What type of interface is used for communication?
A4: The RS-488 interface allows integration with control and monitoring systems.
Q5: Can it perform voltage-check functions as well?
A5: Yes, it supports both synchro-check and voltage-check functions.