Tests - EasyPact MVS2 TS Circuit Breaker User Guide

Overview

The tests to do while commissioning an MVS circuit breaker are described in this section:

Functional checks
Check of MCH gear motor (if fitted)
Check of electrical continuity
Check of high-voltage insulation
Check of TS indication LED status
Test of the tripping mechanism with EcoStruxure Power Commission software
Test of the tripping mechanism with the test button (TS 6.0S trip systems)
Automatic trip curve test with EcoStruxure Power Commission software

Only do the tests required, depending on the EasyPact MVS type and the functions in use, and record the results on the EasyPact MVS Test Form. In the event of non-conformance, the result must be recorded and the EasyPact MVS circuit breaker must not be accepted into service.

Functional Checks

Follow this procedure to check the operation of the EasyPact MVS circuit breaker and record the results on the test form.

Step	Action
1	Manually charge the mechanism by pulling the spring charging handle down.
2	Close the circuit breaker. Check the closing of the circuit breaker in each of the different means designed for the application.
3	Open the circuit breaker. Check the opening of the circuit breaker in each of the different means designed for the application.

If the circuit breaker does not close or does not open, refer to EasyPact MVS Troubleshooting.

Check of MCH Gear Motor (if Fitted)

Follow this procedure to check the operation of the MCH gear motor and record the results on the test form.

Step	Action
1	Remove the MCH gear motor power supply.
2	Do an opening/closing/opening cycle to discharge the mechanism.
3	With the circuit breaker in the open position and the mechanism discharged, check electrical continuity between terminals B1 and B2, and electrical non-continuity between terminals B1 and B3.
4	Manually charge the mechanism.
5	Reconnect the MCH gear motor power supply. The circuit breaker closes and the mechanism is automatically charged.
6	Check electrical continuity between terminals B1 and B3.
7	Operate the circuit breaker several times to check that the spring mechanism automatically recharges after every closing operation.

Check of Electrical Continuity

Follow this procedure to check electrical continuity using a multimeter or continuity checker and record the results on the test form.

Step

Action

1

Close the circuit breaker.

2

Check electrical continuity, for each of the phases, between the upper and lower power terminals:

For fixed circuit breaker: on the power terminals
For the drawout circuit breaker: on the chassis power terminals, with the circuit breaker in the connected position

Check of High-Voltage Insulation

Dielectric tests (high potential and insulation resistance tests) are used to check the insulation between phases, and insulation between each phase and ground. The equipment used to conduct these tests creates a high potential voltage (thousands of volts) to check dielectric or insulation integrity.

Follow this procedure to check insulation resistance and record the results on the test form.

Step	Action
1	Unplug any cables from the 5-pin port on the front face of the TS trip system.
2	Close the EasyPact MVS circuit breaker.
3	Measure the insulation resistance using a 500 Vdc insulation resistance tester between one of the phases and the other two phases grounded. Repeat for each phase.
4	Open the EasyPact MVS circuit breaker by pressing the opening pushbutton.
5	Measure the insulation resistance using a 500 Vdc insulation resistance tester between one of the phases and ground, with all other phases grounded. Repeat for each phase.
6	Check that the insulation resistance is above 5 MΩ in each case. If this result is not obtained, contact your field service representative.

Check of TS Ready LED Status

Follow this procedure to check the functioning of the TS trip system and record the results on the test form.

Step	Action
1	Provide power to the TS trip system, for example, by connecting a PC to the 5-pin port on the front face.
2	Check that the TS Ready LED is flashing green. The Ready LED flashes green to indicate that: The sensors are correctly wired. The tripping mechanism is functioning correctly. The TS trip system is functioning correctly.
3	If the Ready LED is not flashing green, refer to EasyPact MVS Critical Cases.

Step

Action

1

Provide power to the TS trip system, for example, by connecting a PC to the 5-pin port on the front face.

2

Check that the TS Ready LED is flashing green.

The Ready LED flashes green to indicate that:

The sensors are correctly wired.
The tripping mechanism is functioning correctly.
The TS trip system is functioning correctly.

3

If the Ready LED is not flashing green, refer to EasyPact MVS Critical Cases.

Test of the Tripping Mechanism With EcoStruxure Power Commission Software

Follow this procedure to test the tripping mechanism of the circuit breaker and record the results on the test form.

Step	Action
1	Close the circuit breaker.
2	Connect a PC running EcoStruxure Power Commission software by using the function test and isolation module connected to the 5-pin plug on the front face of the TS trip system.
3	On EcoStruxure Power Commission software, select the circuit breaker and connect to it.
4	Force the circuit breaker to trip by clicking the Force Trip button on the EcoStruxure Power Commission screen. This action is password-protected.
5	Check that the circuit breaker is open.
6	Check that the blue fault-trip reset button has popped out.
7	Check that one trip cause LED is on.
8	Check that the SDE contacts have switched.
9	After the test, reset the circuit breaker.

Test of the Tripping Mechanism with the Test Button (TS 6.0S Trip Systems)

Follow this procedure to test the tripping mechanism of the circuit breaker when fitted with a TS 6.0S trip system, and record the results on the test form.

Step	Action
1	Close the circuit breaker.
2	Use a thin screwdriver to briefly push in (<1 s) the test button on the trip system.
3	Check that the circuit breaker is open.
4	Check that the blue fault-trip reset button has popped out.
5	Check that the G trip cause LED is on.
6	Check that the SDE contacts have switched.
7	After the test, reset the circuit breaker.

Automatic Trip Curve Test With EcoStruxure Power Commission Software

Follow this procedure to run the automatic trip curve test and record the results on the test form.

Step	Action
1	Close the circuit breaker.
2	If the circuit breaker is equipped with an MN undervoltage release, either connect it to the power supply with its rated voltage or remove the MN undervoltage release.
3	Connect a PC running EcoStruxure Power Commission software by using the function test and isolation module connected to the 5-pin plug on the front face of the TS trip system.
4	On EcoStruxure Power Commission software, select the circuit breaker and connect to it.
5	In the Circuit breaker Check up section, click the Circuit breaker tab.
6	Select the Automatic Trip Test section.
7	Select Preconfigured test point.
8	Select the overcurrent protection to be tested.
9	Click Run Test.
10	Check that the circuit breaker trips.
11	Check that the blue fault-trip reset button has popped out
12	Check that the related trip cause LED is lit.
13	Check the SDE contacts have switched.
14	After the test, reset the circuit breaker.