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Test the circuitry. The following tests are recommended:

• Polarity check

• VT circuit voltage measurement (primary injection test)

• Earthing check

• Phase relationship

• Insulation resistance check

The polarity check verifies the integrity of circuits and the phase relationships. The

polarity should be measured as close as possible to the IED so ensure that most of the

wiring is also checked.

The primary injection test verifies the VT ratio and the wiring all the way through

from the primary system to the IED. Injection must be performed for each phase-to-

neutral circuit and each phase-to-phase pair. In each case voltages in all phases and

neutral are measured.

8.2.4 Checking binary input and output circuits

8.2.4.1 Binary input circuits

Preferably, disconnect the binary input connector from the binary input cards. Check

all connected signals so that both input level and polarity are in accordance with the

IEDs specifications.

8.2.4.2 Binary output circuits

Preferably, disconnect the binary output connector from the binary output cards.

Check all connected signals so that both load and voltage are in accordance with the

IED specifications.

8.3 Authorizations

8.3.1 User authorization

The user categories have been predefined for LHMI and WHMI, each with different

rights and default passwords.

Passwords are settable. LHMI password must be at least four and WHMI password

at least nine characters. Maximum number of characters is 20 for the WHMI password

and 8 for the LHMI password. Only the following characters are accepted:

1MRS756708 A Section 8

Commissioning

615 series 91

Operation Manual

ABB REF615 User Manual

Other manuals for ABB REF615