Motor driven

HSM 1-phase and HTM 3-phase

METREL motor-operated units differ from manual types primarily in the means used to rotate the shaft to vary output voltage. A synchronous motor is used to position the slider. The motor is reversible by means of a SPDT switch (not supplied) and operates on 230 V, 50 / 400 Hz. Integrated limit switches prevent overriding the winding edges.

Typical methods for controlling METREL motor-operated units include:

  • Manual increase/decrease switch consists of either momentary-contact push-button or lever-type toggle switch.
  • Relays and contactors control the increase/decrease power to the motor as a result of low-level signals from external circuitry. Example: photoelectric cells or thermostat signals can provide the input.
  • Process control instrumentation can be used for closed-loop, precise control, and more sophisticated circuitry to provide the raise-fall switching for the motor.

 

Technical specification

1-phase HSM 230 HSM 260
Input 230 V 230 V
Output: 0 V ... 230 V 0 V ... 260 V
Current 3 A ... 32 A 2.5 A ... 30 A
Power 690 VA ... 7360 VA 650 VA ... 7800 VA
3-phase HTM 400 HTM 450
Input 400 V 400 V
Output 0 V ... 400 V 0 V ... 450 V
Current 3 A ... 32 A 2.5 A ... 30 A
Power 2070 VA ... 22080 VA 1930 VA ... 23400 VA

* Maximum current range depends on model type

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Variable transformers - English