Current and voltage monitoring relay TRM-30M - 1-phase, 30 A, digital display

Product description

The TRM-30M is a single-phase digital relay for protecting sensitive devices from overcurrent, over- and undervoltage .
The device allows for 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

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

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

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

• Voltage hysteresis: 5 V

• Voltage fault delay: 2 s

• Voltage fault reset: 2 s

• Clear two-line LED display:

  • Top line - Voltage and overcurrent

  • Bottom line - Delay time and current

• LED status indicator "OUT"

Operating principle

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

• The device monitors the voltage between phase and 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 out

  • The corresponding indicator is flashing.

Protective functions

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

• Overvoltage: at a voltage above 250 V (automatic return when the voltage drops below 245 V)

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

Signaling

• Top indicator flashes: High or low voltage error

• Lower indicator flashes: High current error

• LED OUT: illuminated during normal operation

Relay status

use

• 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