Harmann - automation - transformer speed regulator ST2R 4

Two-stage transformer speed regulator for three-phase motors in rotary devices (pumps, fans) with an integrated timer (stop / high / low). The high and low voltage voltages are defined during installation by selecting the terminal in two autotransformer w.

Technical data

• built-in thermal protection (TK)
• housing made of painted steel sheet
• degree of protection IP54 (surface mounting)
• LCD panel
• non-adjustable output (230 V / 2 A) for controlling an additional valve, indicator or damper actuator
• input for connecting motor thermal contact
• the ability to remotely stop / resume work
• two pairs of terminal in (OC, CC) for connecting external contacts in potential-free to stop and resume motor operation
• low and high gear voltages defined during installation
• thresholds available 130-170-210-250-290-330-400 V
• maximum working temperature 35 C