Current and voltage monitoring relay TRM-30M - single-phase, 30 A, digital display

Product description

The TRM-30M is a single-phase digital relay for protecting sensitive devices against overcurrent, overvoltage, and undervoltage.
The device allows precise adjustment of current limit and delay and displays the measured voltage and current values on a two-line display. A current transformer is included.

Main features

• Overload protection: adjustable current 0.5 ... 30 A

• Overvoltage protection: activation at voltage > 250 V (fixed)

• Undervoltage protection: activation at voltage < 150 V (fixed)

• Voltage hysteresis: 5 V

• Voltage fault delay: 2 s

• Voltage fault reset: 2 s

• Clear two-line LED display:

  • Upper line - voltage and overcurrent

  • Lower line - delay time and current

• LED status indicator "OUT"

Operating principle

• When the power is switched on, the set overcurrent value and delay time are displayed.

• The device monitors the voltage between phase and neutral and the current drawn from the network.

• If the set values are exceeded, the relay switches to a fault state:

  • NO contact open, NC contact closed

  • The LED "OUT" goes off

  • The corresponding indicator blinks

Protection functions

• Overload (overcurrent): when the set current and time delay are exceeded

• Overvoltage: at a voltage above 250 V (automatic reset when voltage falls below 245 V)

• Undervoltage: at a voltage below 150 V (automatic reset after rising above 155 V)

Signaling

• Upper indicator blinks: high or low voltage fault

• Lower indicator blinks: high current fault

• LED OUT: lights up during normal operation

Relay status

Usage

• Protection of single-phase sensitive devices (motors, heaters, lighting)

• Current and voltage monitoring in industrial and domestic applications

• Precise limit and time delay settings for reliable operation