Model: SPER 1B1 C4 (SPER1B1C4)
Brand: ABB
Series: SPER / SPACOM Monitoring Devices (Protection Relays)
Core Function: Continuous supervision of circuit-breaker trip circuits and other critical control circuits in power electrical installations. Detects open circuits, bad contacts, contact welding, and loss of auxiliary voltage, providing immediate alarm indication.
HS Code: 8536.49 / 8537.10 (Relays / Boards and panels for electric control)
Product Parameters
| Parameter | Specification |
|---|---|
| Product Type | Trip Circuit Supervision Relay |
| Monitored Circuit Voltage | 40 – 265 V DC |
| Measuring Current | Typ. 1.5 mA |
| Min. Residual Voltage | > 40 V DC (over monitored circuit) |
| Operate Delay | Typ. 3 s (prevents false alarms during CB operation) |
| Reset Time | Typ. 1 s |
| Auxiliary Supply | 40 – 265 V DC (Rated: 48 / 60 / 110 / 220 V DC) |
| Current Drain (Aux) | Typ. 7 mA |
| Indication | Front-panel LED + output relay |
| Mounting | Standard 11-pin plug-in relay unit with rail-mounting terminal socket |
| Design | Plug-in / DIN-rail compatible |
| Related Versions | SPER 1C1 / SPER 1C2 (COMBIFLEX design) |
Advantages and Features
- Continuous monitoring of trip and control circuits
- Detects open circuit, high contact resistance, contact welding, and auxiliary voltage failure
- Built-in time delay avoids nuisance alarms during normal circuit-breaker operation
- Clear LED indication and dedicated output relay for remote signaling
- High immunity to interference with galvanically isolated electronics
- Compact plug-in design for easy installation and replacement
- Proven technology from ABB’s SPACOM / Distribution Automation family
- Suitable for both primary and backup circuit supervision
Application Cases in Application Fields
- Supervision of circuit-breaker trip circuits in medium- and high-voltage substations
- Monitoring of disconnector and isolator control circuits
- Signalling and interlocking circuit supervision
- Power generation plants and industrial electrical installations
- Distribution automation and substation control systems
- Applications requiring continuous integrity monitoring of critical control circuits
- Retrofit or expansion of existing SPACOM-based protection schemes
Comparisons with Competing Products
| Aspect | ABB SPER 1B1 C4 | Basic Trip Circuit Relays | Digital Protection Relays with Built-in TCS |
|---|---|---|---|
| Monitoring Type | Continuous dedicated supervision | Basic / intermittent | Integrated in main relay |
| False Alarm Prevention | Preset 3 s delay | Limited | Software configurable |
| Mounting | Plug-in 11-pin / rail | Varies | Panel / rack |
| Indication | LED + output relay | Basic | Advanced (HMI / SCADA) |
| Best For | Dedicated trip circuit supervision | Simple applications | Full numerical protection |
Selection Suggestions and Precautions
Selection Suggestions:
- Use one SPER 1B1 C4 relay per circuit to be supervised.
- Confirm the monitored circuit voltage is within 40–265 V DC.
- Select the correct auxiliary supply voltage rating (48/60/110/220 V DC range).
- For COMBIFLEX mounting systems, consider SPER 1C1 or SPER 1C2 instead.
- Verify compatibility with existing SPACOM or Distribution Automation installations.
Precautions:
- Ensure correct wiring of the supervised circuit and auxiliary supply.
- The operate delay is fixed; do not expect instantaneous alarming during normal CB operation.
- Follow ABB installation guidelines for polarity, residual voltage, and external resistors if required.
- Use only the recommended terminal socket for reliable connections.
- Regular functional testing is recommended as part of substation maintenance routines.
Recent Popular Same-Brand / Related Models
- SPER 1C1 / SPER 1C2 — COMBIFLEX versions of the trip circuit supervision relay
- Other SPER series monitoring and supervision relays
- ABB SPACOM protection and control relays
- REF615 / REL670 / other numerical protection relays with integrated trip circuit supervision
- Related medium-voltage protection and monitoring devices
- RIO600 and other remote I/O units for substation automation
