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Application Scenarios:
In a large data center’s power distribution system, the automatic transfer switch (ATS) logic determines that the main utility source has failed and the backup generator is stable. The ATS controller sends a command to close the breaker on the generator side. This command is executed by the ABB SCR-1SDA063550R1 shunt closing release mounted on that specific 800A Emax breaker. Upon receiving the 24V DC signal, the SCR-1SDA063550R1 energizes its coil, which mechanically actuates the breaker’s closing mechanism, seamlessly connecting the generator to the critical bus. This entire sequence happens in seconds without any human intervention. The reliability of the SCR unit is paramount; a failure to close would strand the data hall without power, risking millions in downtime. This scenario highlights its role as the critical “muscle” for remote-controlled power switching in automated infrastructure.
Parameter:
| Main Parameters | Value / Description |
|---|---|
| Product Model | ABB SCR-1SDA063550R1 |
| Manufacturer | ABB |
| Product Category | Shunt Closing Release / Electric Closing Coil |
| Primary Function | Provides electrical (remote) closing for MCCB |
| Compatible Breakers | ABB SACE Tmax T4-T7, Emax E1-E6 series (specific ratings apply) |
| Rated Control Voltage | Common voltages: 24V DC, 48V DC, 110V DC, 220V DC, 110-120V AC, 220-240V AC |
| Power Consumption | Intermittent duty; high inrush current for a short duration during closing |
| Operation Type | Momentary energization (pulse) to close; not designed for continuous duty |
| Mechanical Lifespan | Tens of thousands of operations (typically ≥ 10,000) |
| Electrical Connection | Screw terminals for control wiring |
| Mounting | Directly attached to the side or front of the compatible MCCB |
| Ambient Temperature | -25°C to +70°C (for reliable operation) |
| Protection Degree | Typically IP20 for installation within a cubicle |
