A255 controllers are used in fans where the speed must be controlled by a signal from a temperature sensor. The total current drawn by the fan motors with the A255 should not ...
A255 controllers are used in fans where the speed must be controlled by a signal from a temperature sensor. The total current drawn by the fan motors with the A255 should not exceed 5A per phase.
Product selection table
Model | Power supply voltage |
A255ML-9100 | 230V-3phase |
A255MM-9100 | 400V-3phase |
- Built-in switch for direct / reverse operation
- A wide range of sensors in various housings
- Models for "star" or "delta" connections
- Protection class IP54
- Possibility to choose minimum speed or power cut off
- Built-in setpoint adjustment
- Adjustable hysteresis in cut-off mode
- Adjustable upper limit
- Motor cosφ regulation
The regulator changes the supply voltage to the motor in the range from 30% to 95% of the supply voltage using a thyristor system.