Digital overcurrent relay with 3×3-digit LED display TRM-100

Three-phase current relay for monitoring / limiting load current in the range of 40–100 A, manufacturer TENSE (Turkey)

Digital overcurrent relays TRM-100 are designed to protect the load from damage caused by high current while allowing for operational control.

• 40–100 A (adjustable overcurrent value)
• 50% fixed asymmetry of current
• Adjustable fault delay time
• Adjustable operating mode (automatic, semi-automatic, manual)
• When purchasing the TENSE current relay, you will receive a complete device ready to Operation — the supply includes current transformers.

Use of the device and principle activities

1. Connect the device according to the wiring diagram.
2. After completing the wiring, supply power. After when turned on, the display will show the set values for 5 seconds.
3. To set the value for overcurrent use the regulator "A>". The set value is displayed on left display.
4. To set the delay time use the regulator "t". The set value is also displayed on the left the display.

When the device is turned on:
• The relay is activated, the output contact switches to terminal 3, and it will light up the OUT indicator.
• If the current exceeds the set overcurrent value (A>), the device will start will count down the delay time and the ERR indicator will light up.
• After the time has elapsed, the relay will turn off, the contact will switch to terminal 1, and the OUT indicator will turn off.

Description

The electronic current relay of the TRM-100 series is designed for the automatic disconnection of appliances when exceeding the maximum permissible current.
Allows setting the switching current, delay time, and reactivation time.
They are available 3 return programs to 'operational' mode — MANUAL, SEMI-AUTOMATIC, and AUTOMATIC.

Reset modes:

• Manual mode: After an overcurrent fault, it is necessary to reset the device by pressing the Reset button. In this mode, the corresponding LED indicator.
• Semi-automatic mode: The system automatically resets after an overcurrent fault. three times, then waits for a manual reset on the next fault. In this mode, it lights up the corresponding LED indicator.
• Automatic mode: The system automatically resets after each overcurrent fault. In this mode, the corresponding LED indicator lights up.

Note: To change the mode, press and hold the SELECT button. for 10 seconds. After the mode change, the corresponding LED indicator will light up.

Asymmetry 50% (fixed)

If the difference between the largest and smallest phase if the current exceeds 50%, the device will switch to fault mode within 2 seconds. asymmetry.
(This prevents damage to the system during motor operation in the event of loss of one phase.)

In case of asymmetry error:
• The group of displays of the two phases that caused the fault will start to blink and the ERR indicator will light up.
• To exit the fault mode, the device must be reset manually.

Technical parameters:

• Operating voltage: 150–260 V AC
• Operating frequency: 50/60 Hz
• Power consumption: < 6 VA
• Operating temperature: -20 °C to +55 °C
• Display: 3x3 digits, 5 LEDs
• Overcurrent setting (A>): 40–100 A
• Delay time: 0.1 s – 20 s
• Connection type: terminal
• Contacts: 5 A / 250 V AC (active load)
• Wire diameter: 2.5 mm²
• Weight: max. 250 g
• Mounting: on DIN rail
• Operating altitude: < 2000 m

Note: The TRM-50, TRM-100, TRM-200, and TRM-300 models can only be used with current transformers that are included in the supply.
The TRM-400 model can be used with a current transformer 400/5.

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