Current and Voltage Control Relay TRM-30M - 1-phase, 30A, 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. It includes a current transformer.

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

  • Bottom line - delay time and current

• "OUT" status indicator LED

Operating Principle

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

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

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

  • NO contact open, NC contact closed

  • "OUT" LED turns off

  • Corresponding display flashes

Protection Functions

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

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

• Undervoltage: when voltage is below 150 V (automatic return when rising above 155 V)

Signaling

• Top display flashes: high or low voltage error

• Bottom display flashes: high current error

• OUT LED: lights up during normal operation

Relay Status

Use

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

• Current and voltage control in industrial and domestic applications

• Precise limit and timing settings for reliable operation