Contact Test; Figure 300: Test Example 3 - GE MiCOM P40 Technical Manual

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Chapter 24 - Commissioning Instructions

CONTACT TEST

The Apply Test command in this cell is used to change the state of the contacts set for operation.

If the device has been put into 'Contact Blocked' mode using an input signal (via the Block Contacts DDB signal)

then the Apply Test command will not execute. This is to prevent a device that has been blocked by an external

process having its contacts operated by a local operator using the HMI.

If the Block Contacts DDB is not set and the Apply Test command in this cell is issued, contacts change state and

the command text on the LCD changes to No Operation. The contacts remain in the Test state until reset by

issuing the Remove Test command. The command text on the LCD shows No Operation after the Remove Test

command has been issued.

When the IED Test Mode cell is set to Contacts Blocked, the Relay O/P Status cell does not show the current status of the

output relays so cannot be used to confirm operation of the output relays. Therefore it is necessary to monitor the state of

each contact in turn.

P446SV-TM-EN-1