Operation And Execution Of The Tripping Function - Siemens Sentron 3VA Manual

Accessories
4.11 Test devices
4.11.2.1

Operation and execution of the tripping function

Personal injury, unintentional tripping and irreparable damage to the TD300
Use of the TD300 when the molded case circuit breaker is not de-energized can result in
personal injury, unintentional tripping of the circuit breaker and irreparable damage to the
TD300.
Disconnect the molded case circuit breaker from the power supply before using the TD300
activation and trip box.
TD300: Connect, switch on and off, disconnect
Connect the TD300 to the 3VA6 molded case circuit breaker
1. Disconnect the molded case circuit breaker from the power supply.
2. Insert the connecting cable in the test socket of the ETU.
Switch the TD300 on and off
1. Check whether the molded case circuit breaker is disconnected from the power supply. If
it is not, disconnect it.
2. Push the slide switch to ON.
The LED labeled "ACT" on the TD300 lights up and the ETU display is activated. The
TD300 is ready.
If the "ACT" LED does not light up:
– Push the slide switch to OFF.
– Detach the connecting cable from the molded case circuit breaker.
– Replace the batteries.
– Follow the correct sequence of steps to connect the unit to the molded case circuit
– Push the slide switch to ON.
3. Push the slide switch to OFF.
The LED labeled "ACT" on the TD300 goes out to indicate that the unit is switched off.
Disconnect the TD300 from the 3VA6 molded case circuit breaker
1. Switch off the molded case circuit breaker (OFF position).
2. Detach the connecting cable from the molded case circuit breaker.
362
CAUTION
breaker again.
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01