Description

BRUSH MAS100 (Microsync Automatic Synchronization Relay)
BRUSH MAS100 is an automatic synchronization relay in the Microsync series from British Brush Electrical (formerly FKI Industrial Drives). It is used for automatic synchronization and grid connection of generators / power grids. It has been discontinued and is commonly found in the second-hand / refurbished spare parts market for power stations / industrial drives.

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Core parameters (industrial grade)
Model: BRUSH MAS100
Function: Automatic synchronization and grid connection of generator and power grid (voltage / frequency / phase matching)
Applicable scenarios: Medium and low voltage generators (diesel / gas / steam turbine)
Input voltage: Three-phase 110–415 VAC (grid + generator dual paths)
Frequency: 50/60 Hz adaptive
Control output: Relay contacts (passive dry contacts, capacity 250 VAC / 5 A)
Synchronization accuracy: Phase difference < ±5°, frequency difference < 0.1 Hz, voltage difference < ±5%
Working mode: Automatic capture of synchronization point, manual / semi-automatic switching
Enclosure: Metal chassis, IP20, wall-mounted / panel-mounted
Dimensions (approx.): 250 × 180 × 80 mm
Weight (approx.): 2.89 kgEnvironment: 0°C ~ +55°C, vibration resistant (10–55 Hz)

Key features
Fully automatic grid connection: Built-in synchronization detection logic, automatically adjusts generator speed/voltage, zero impact grid connection
Wide voltage adaptive: 110–415 VAC universal, compatible with global medium and low voltage power grids
High reliability: Industrial-grade components, long lifespan, suitable for 24-hour continuous operation of power stations
Fault safety: Locks out grid connection and outputs alarm in case of disynchronization / overvoltage / underfrequency
High compatibility: Compatible with mainstream generator control circuits such as Brush, ABB, Siemens, etc.
Typical application
Industrial power stations and backup generators connected to the grid
Automatic switching of diesel/gas generators with the mains power
Synchronization of ship power systems and isolated island power grids
Replacement of old Microsync MAS100/MAS1000 synchronizers