Secondary Injection Testing; Dielectric Test On The Main Circuit - AuCom MVE Series User Manual

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10.2 Secondary injection testing

The MVE supports secondary injection testing to prove the correct operation of the soft starter's protection functions.
Secondary injection tests that the soft starter's current and voltage protection and metering functions are operating
according to the parameter settings.
Secondary injection testing uses the soft starter's DOL+ Mode. The soft starter requires power interface board
990-15436-00 and interface software version 2.34 or later.
Current inputs for the testing are applied at the CT test block. Custom test leads must be used to inject three-phase
voltage into voltage inputs. Contact your supplier for assistance.
Secondary injection testing requires specialist equipment such as the Omicron CMC 356 relay test set. The test
equipment must be configured and operated by a trained specialist. To conduct secondary injection testing, contact
your supplier for assistance.

10.3 Dielectric test on the main circuit

Every MVE soft starter is individually dielectric tested (hipot test) at the factory, and the test report is available on
request.
Dielectric testing of the entire system at site is at the customer's sole risk. Voltage test levels should be reduced by
20% compared with the standard test values.
CAUTION
The test voltages for dielectric tests should not exceed the ratings of any individual component, such as
contactors, circuit breakers or current transformers.
Dielectric test standard voltages
1. IEC 62271-1 (table 1a) test voltages for each rated mains voltage are:
Mains voltage (kV)
2.3-3.6
4.1-7.2
11-13.8
2. Standard test voltages used for dielectric tests are:
Mains voltage (kV)
2.3-3.6
4.1-7.2
10-12
13.8-15
Procedure
1. Prepare the soft starter:
1. Connect a high voltage transformer to the starter as for the power frequency withstand test.
2. Remove MV surge arrestors (if fitted).
3. Short each phase of the main device input to output.
4. Short each phase of the bypass device input to output.
5. Short each phase arm input to output.
6. Short every SCR, in pairs.
2. Perform the dielectric test:
1. Connect the ground cable of the high potential tester to panel earth.
2. Connect the live cable of the high potential tester to the soft starter busbars.
3. Set the high potential tester for the correct testing voltage according to the mains voltage rating of the
starter. For re-testing on site, reduce the standard test voltage by 20%.
4. Apply voltage to Phase A (with phases B and C connected to ground ) for 1 minute
5. Apply voltage to Phase B (with phases A and C connected to ground ) for 1 minute
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Common value (kV)
10
20
28 (42 CCC & Gost)
Clause 7.2.12 80% - Condition check (kV)
8
16
22.4 (33.6)
Factory test level (kV)
10
20
28
38