Beckwith Electric M‑0193B Synchrocloser Unit
The Beckwith Electric M‑0193B is a synchrocloser unit designed for automatic synchronising of generators or feeders with a power system. It monitors the voltage, frequency, and phase angle of both sides of a circuit breaker and issues a close signal when synchronism conditions are met. This unit ensures that breakers are closed at the optimum moment, minimising mechanical stress and electrical transients.
The M‑0193B features adjustable slip frequency, voltage difference, and phase angle windows. It includes a dead‑bus closure option and a built‑in time delay for breaker close pulse. The unit is housed in a compact case suitable for panel mounting.
Key Features
Automatic synchronising with adjustable parameters
Voltage match: 80–120% of nominal
Frequency difference: 0.02–2.0 Hz
Phase angle window: ±5° to ±20°
Dead‑bus and live‑bus closure
Output relay for breaker close
LED status and fault indication
Technical Specifications
Inputs: 120 VAC, 50/60 Hz from both sources; burden: < 5 VA; accuracy: ±1% voltage, ±0.02 Hz; close pulse: 0.1–1 s adjustable; output: 1 x SPDT, 5 A; operating temperature: -20°C to +65°C.
Applications
Used in generator paralleling panels, automatic transfer switches, and network tie‑breaker control. The unit ensures safe and reliable synchronisation, reducing operator workload.
Installation and Setting
Mount the unit on a panel. Connect voltage sensing leads from both sides. Set the synchronising parameters using the front‑panel potentiometers and DIP switches. Test the unit with a variable frequency source during commissioning.
Reliability and Maintenance
Solid‑state design ensures long life and stable performance. The unit is protected against transients. Regular verification of settings is recommended.
Why Choose the M‑0193B?
This synchrocloser offers a cost‑effective, reliable solution for automatic synchronising, backed by Beckwith Electric’s expertise. Its ease of use and robust design make it a preferred choice.
In summary, the Beckwith Electric M‑0193B ensures precise and safe breaker closure, enhancing power system reliability.
