ABB SPAU 330 C1-AA Overvoltage and Undervoltage Relay

Product Description

The ABB SPAU 330 C1-AA, based on the SPAU 330 voltage protection relay platform, monitors electrical voltage conditions and evaluates deviations against configured protection thresholds. It is designed for voltage supervision in power protection circuits. Exact supply ratings, measurement ranges, output contact arrangements, and configuration options require confirmation against the specific relay nameplate and technical manual.

Hardware Specifications

Voltage Measurement and Protection Logic

The relay evaluates voltage measurements against configured overvoltage and undervoltage thresholds. When a measured condition satisfies the applicable operating criteria, the protection logic can initiate an alarm or trip output according to the relay configuration.

For installation and commissioning, verify the following parameters against the applicable ABB documentation:

• Voltage input rating and measurement circuit wiring.
• Overvoltage and undervoltage pickup thresholds.
• Operating delays and reset characteristics.
• Output contact assignments and contact ratings.
• Auxiliary supply requirements and terminal identification.

The supplied information does not establish the exact measurement range, timing curves, or output contact ratings for the C1-AA configuration.

Frequently Asked Questions

Q: Can the SPAU 330 C1-AA operate from both AC and DC auxiliary supplies?

A: The supplied data states an auxiliary supply range of 110-240 VAC/DC. Confirm the permitted AC and DC ranges for the specific hardware variant before energizing the relay.

Q: What should be checked before connecting the relay to a voltage transformer circuit?

A: Verify the rated measurement input, transformer secondary voltage, terminal assignments, circuit protection, and wiring diagram. Do not apply a voltage based solely on the auxiliary supply rating.

Q: Can the relay output contacts directly operate a circuit breaker trip coil?

A: This depends on the contact voltage and current ratings and the trip coil's electrical load. Check the relay contact specifications and use an interposing relay when required by the circuit design.

Field Installation Guidelines

1. Verify the complete model designation and hardware nameplate before installation.
2. Confirm the panel cutout, mounting arrangement, terminal layout, and required clearances from the applicable installation manual.
3. Isolate the auxiliary supply and voltage measurement circuits before wiring or servicing.
4. Route voltage measurement wiring separately from high-current power conductors where practical. Follow the site's electromagnetic compatibility and wiring segregation requirements.
5. Connect protective earth and panel bonding in accordance with the equipment design and applicable electrical standards. Do not use signal wiring as a substitute for protective grounding.
6. Check terminal tightness, circuit polarity where applicable, and voltage transformer secondary connections before energization.
7. Test overvoltage and undervoltage pickup, operating delays, reset behavior, alarms, and trip outputs using an approved commissioning procedure.
8. Record the verified settings and test results. Do not assume hot-swap capability or modify energized wiring without explicit manufacturer authorization.

Other Attributes

• Series: Advant OCS/800xA
• Country of Origin:  Germany/Sweden/Finland
• Lead Time: In Stock, 2 Working Days

In Stock Hot Items of ABB

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