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.
|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