Monitoring current and voltage relay TRM-30M - 1-phase, 30 A, digital display

Product description

The TRM-30M is a single-phase digital relay designed to protect sensitive equipment from overcurrent, overvoltage and undervoltage.
The device allows precise adjustment of current limit and delay and displays measured voltage and current values on a two-line display. A current transformer is included.

Main functions

• 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 error delay: 2 s

• Voltage error reset: 2 s

• Clear two-line LED display:

  • Top line - voltage and overcurrent

  • Lower line - delay time and current

• LED status indication "OUT"

Operating principle

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

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

• If the set values are exceeded, the relay enters an error state:

  • NO contact open, NC contact closed

  • The "OUT" LED goes off

  • The corresponding display flashes

Protection functions

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

• Overvoltage: when voltage is above 250 V (automatic return after dropping below 245 V)

• Undervoltage: at voltage below 150 V (automatic return after increase above 155 V)

Signaling

• Upper display flashes: high or low voltage error

• Lower display flashes: high current error

• LED OUT: illuminates during normal operation

Relay status

Use

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

• Current and voltage monitoring in industrial and domestic applications

• Precise limit and time delay settings for reliable operation