Testing Of Protection Relay Operation; Selecting Ied Test Mode; Testing And Commissioning Support On Local Hmi - ABB RELION REX640 Operation Manual

Commissioning
7.5

Testing of protection relay operation

The protection relay has to be in the test mode before the digital outputs and
certain output signals of protection and other functions can be activated.
7.5.1

Selecting IED test mode

The test mode can be activated using the LHMI. The Home button is flashing green
at low frequency to indicate that the test mode is activated. By default, the test
mode can only be changed from the LHMI. Activation by remote client is possible,
see the technical manual.
The test mode is useful for simulated testing of functions and outputs without
providing current inputs.
• Select Testing and Commissioning > Test mode > IED test to activate the
internal fault test.
Figure 117: Selecting IED test mode
7.5.2

Testing and commissioning support on local HMI

The LHMI supports the engineer during the relay's testing, commissioning
and troubleshooting activities. The information, traditionally accessible through
different paths within the menu structure, is provided in a collectively grouped and
138
If the test mode is not cancelled, it remains on and the Home button
remains flashing.
1MRS759118 D
REX640
Operation Manual