Motor driven Variable Transformers HSM - single phase, HTM - three 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 / 60 Hz. Integrated limit switches prevent overriding the winding edges.Typical methods for controlling METREL motor-operated units include: 1. Manual increase/decrease switch consists of either momentary-contact push-button or lever-type toggle switch. 2. 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. 3. Process control instrumentation can be used for closed-loop, precise control, and more sophisticated circuitry to provide the raise-fall switching for the motor.Motor operating time refers to the number of seconds for the motor to traverse its full range in one direction. METREL transformers have standard 26 s motor operating time. Other motor operating times are optional.

Variable transformer with motor drive

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Com ComUpDown UpDown M

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Down u InputOutput InputOutput

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Wiring schematic Remote control application principle(230 V motor)

Technical specification

Input voltage 230 V Input voltage 400 V Output voltage 0 ÷ 230 V Output voltage 0 ÷ 260 V Output voltage 0 ÷ 400 V Output voltage 0 ÷ 450 V

Type Is (A) P (VA)Type Is (A) P (VA) Mass (kg)Model Type Is (A) P (VA)Type Is (A) P (VA) HSM 230/3 3.0690 HSM 260/2.5 2.56504.5M50 HTM 400/3 3.02070 HTM 450/2.5 2.51950 HSM 230/4 4.0920 HSM 260/3 3.07804.5M50 HTM 400/4 4.02760 HTM 450/3 3.02340 HSM 230/4.5 4.51035 HSM 260/3.5 3.59105.6M100 HTM 400/4.5 4.53105 HTM 450/3.5 3.52730 HSM 230/6 6.01380 HSM 260/4.5 4.511705.6M100 HTM 400/6 6.04140 HTM 450/4.5 4.53510 HSM 230/8 8.01840 HSM 260/6.3 6.316388.0M200 HTM 400/8 8.05520 HTM 450/6.3 6.34914 HSM 230/10 10.02300 HSM 260/8 8.020808.0M200 HTM 400/10 10.06900 HTM 450/8 8.06240 HSM 230/12 12.02760 HSM 260/10 10.0260010.2M250 HTM 400/12 12.08280 HTM 450/10 10.07800 HSM 230/18 18.04140 HSM 260/15 15.0390014.3M300 HTM 400/18 18.012420 HTM 450/15 15.011700 HSM 230/23 23.05290 HSM 260/20 20.0520015.0M400 HTM 400/23 23.015870 HTM 450/20 20.015600 HSM 230/32 32.07360 HSM 260/30 30.0780021.5M500 HTM 400/32 32.022080 HTM 450/30 30.023400

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