Measurements Verification; Function Test - ABB REM 610 Operator's Manual

REM 610
4.3.
4.4.
40
Motor Protection Relay
Operator's Manual

Measurements verification

As most of the protection functions in the protection relay are based on the phase
currents and earth-fault current measured by the relay, it is important to verify that
the relay is measuring proper values. This verification can be performed by
examining the current readings on the display while injecting a pure sinusodial
current into the current input. If the reading on the display corresponds to the
calculated value, taking the relay accuracy and display resolution into account, the
relay is measuring proper values.
Rated current for the energizing input being verified is shown on the relay label
under the lower handle of the relay.
The protected unit scaling factor, used for motor full load current I
has to be taken into account when verifying phase currents measured by the relay.
The value to be shown on the display is calculated as follows:
( )
Value on LCD I =
n
When verifying the earth-fault current measured by the relay, the value to be shown
on the display is calculated as follows:
( )
Value on LCD % =

Function test

This section describes how the signal routing from protection functions to, and
operation of, the output contacts in the relay can be tested.
The internal signals are routed to the output contacts according to the SGR
switchgroups.
The test mode is accessible via FUNCTION TEST/DI under CONFIGURATION
in the HMI menu. In the test mode, all internal signals from the different protection
stages can be activated one by one, the self-supervision included.
1. Press an arrow button to access the main menu.
2. Use or to select CONFIGURATION in the main menu and press
cursor is at the first menu item, FUNCTION TEST/DI. Press
the test menu.
3. The cursor is at the first parameter, FUNC.TEST. Press
mode and give the password if required.
4. Select the wanted signal with
signal will remain active for as long as
5. Repeat the previous step to test other signals.
6. To leave the test mode, press
7. Press again to return the display to the idle mode.

Injected current
-------------------------------------------------------------------------------------- -

energizing input rated current

Injected current
-------------------------------------------------------------------------------------- -

energizing input rated current
or and press
remains pressed.
.
1MRS 752264-MUM
compensation,
n

×
PU scalin
g factor


×
100 %

. The
again to enter
to enter the test
to activate the signal. The