Current and Voltage Control Relay TRM-30M - 1-phase, 30 A, Digital Display

Product Description

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

Key Features

• Overcurrent 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

• LED status indication "OUT"

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 wire and the current drawn from the power grid.

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

  • NO contact open, NC contact closed

  • "OUT" LED indicator turns off.

  • The corresponding display flashes

Protection Functions

• Overcurrent (current overload): if the set current and time delay are exceeded

• Overvoltage: if the voltage exceeds 250 V (automatic return after dropping below 245 V)

• Undervoltage: if the voltage is below 150 V (automatic return after rising above 155 V)

Signaling

• Upper display flashes: high or low voltage error

• Lower display flashes: overcurrent error

• LED OUT: illuminates during normal operation

Relay Status

Use

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

• Current and voltage monitoring in industry and households

• Precise limit and time delay settings for safe operation