Overview
The ABB SPAU 140 C is a numerical synchro-check relay designed to check voltage conditions before connecting two power systems through a circuit breaker. It provides two independent operation stages, each supporting synchro-check and voltage-check functions. The relay evaluates voltage magnitude, phase angle and frequency difference against preset closing conditions, and also supports event recording, numerical displays, self-supervision and serial communication.
Key Functions
- Two operation stages: Provides two identical stages for checking the closing conditions of separate circuit breakers.
- Synchro-check: Permits circuit breaker closing only when the voltage magnitude, phase angle and frequency difference meet the configured conditions.
- Voltage-check: Checks voltage conditions when connecting a de-energized bus section to an energized network section.
- Operating modes: Supports continuous operation and command mode operation.
- Monitoring and diagnostics: Displays setting values, measured values and recorded operating data. Continuous self-diagnostics monitor the relay hardware and software.
- Communication: Uses a fibre-optic serial bus for SPA bus communication and connection to higher-level host systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SPAU 140 C |
| Brand | ABB |
| Product Type | Numerical Synchro-Check Relay |
| Main Functions | Synchro-check and voltage-check |
| Number of Operation Stages | 2 |
| Rated Voltage Inputs | 100 V or 110 V, depending on terminal configuration |
| Continuous Voltage Withstand | 2.0 x rated voltage |
| Input Burden at Rated Voltage | Less than 0.5 VA |
| Permitted Frequency Range | 45-65 Hz |
| Rated Frequency | 50 Hz or 60 Hz, according to order |
| Auxiliary Supply, SPTU 240R4 | 80-265 V AC/DC |
| Auxiliary Supply, SPTU 48R4 | 18-80 V DC |
| Power Consumption | Approximately 5 W at quiescent conditions; 7 W during operation |
| External Control Voltage | 18-265 V DC or 80-265 V AC |
| Typical Activated Control Input Current | 2-20 mA |
| Communication Interface | Fibre-optic serial bus |
| Communication Data Code | ASCII |
| Selectable Transfer Rates | 4800 or 9600 Bd |
| Heavy-Duty Output Contacts | Terminals 85-86 and 87-88 |
| Signalling Output Contacts | Terminals 70-71-72 and 68-69 |
| Output Contact Rated Voltage | 250 V AC/DC |
| Contact Material | AgCdO2 |
| EMC Marking | CE marking stated in the supplied product documentation |
Control Inputs and Data Communication
The external blocking and control inputs are located at terminals 10-11, 22-23, 45-46 and 47-48. The relay accepts the specified AC or DC control voltage range, with a typical activated input current of 2-20 mA. Check the control circuit voltage and terminal assignments before connecting external signals.
The serial interface supports parameter setting, measurement retrieval, event reading and storage of recorded values. Transfer rates are selectable between 4800 Bd and 9600 Bd. Optional SPA bus connection modules are available for plastic-core and glass-fibre cables; the required module and power arrangement depend on the communication configuration.
Auxiliary Power Supply
The supplied specifications identify two auxiliary supply and output relay module variants: SPTU 240R4 and SPTU 48R4. Select the variant according to the available supply voltage, as their operating ranges differ. The relay consumes approximately 5 W under quiescent conditions and 7 W during operation.
Frequently Asked Questions
Q: What is the difference between the synchro-check and voltage-check functions?
A: Synchro-check evaluates the conditions for connecting two power systems, including voltage magnitude, phase angle and frequency difference. Voltage-check verifies voltage conditions when connecting a disconnected bus section to an energized network section.
Q: How do I identify the correct rated voltage input configuration?
A: Check the terminal arrangement and rated input voltage. Terminals 13-14, 16-17 and 19-20 correspond to 100 V, while terminals 13-15, 16-18 and 19-21 correspond to 110 V.
Q: Which auxiliary supply variant should I select?
A: The SPTU 240R4 supports 80-265 V AC/DC, while the SPTU 48R4 supports 18-80 V DC. Confirm the installed module and the available supply before selecting a replacement.
ABB Top Products
Customers Also Viewed
Contact: Manski Wong +86 18030205725 manski@cambia.cn
Reviews
There are no reviews yet.