The device will continue to listen to ‘real’ GOOSE messages until a simulated message is received. Once the
simulated messages ar
e received, the corresponding ‘real’ messages are ignored until the device is taken
out of IED test mode. Each message is treated separately, but sampled values are considered as a single
message.
6. Verify function based on test signal outputs.
Binary outputs (e.g. CB trips) will operate as normal. All transmitted GOOSE and MMS data items will be
tagged with the 'quality' parameter set to 'test', so that the receiver understands that they have been issued
by a device under test and can respond accordingly. This is summarised in the following diagram:
Figure 205: Test example 3
9.3.4 CONTACT TEST
The Apply T
est 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.
Note:
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.
Chapter 20 - Commissioning Instructions P54A/B/C/E
474 P54xMED-TM-EN-1
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