When verifying the ground-fault current measured by the relay, the value to be
shown on the display is calculated as follows:
Value on LCD
Injected current
energizing input rated c
CT%
(
)
=
uurrent
×
100%
(3)
5.4.
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 switch
groups.
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
elements 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
. The
cursor is at the first menu item,
FUNCTION TEST/DI
. Press
again to enter
the test menu.
3. The cursor is at the first parameter,
FUNC.TEST
. Press
to enter the test mode
and give the password if required.
4. Select the wanted signal with
or
and press
to activate the signal. The
signal remains active for as long as you press
.
5. Repeat the previous step to test other signals.
6. To exit the test mode, press
.
7. Press
again to return the display to the idle mode.
The table below shows the activation order and the corresponding flashing digit
when a signal is being tested.
Table 5.4.-1
Function test
Number
Function
1
Pickup of element 51P
2
Trip of element 51P
3
Pickup of element 50P-1
4
Trip of element 50P-1
5
Pickup of element 50P-2
6
Trip of element 50P-2
7
Pickup of element 51N
8
Trip of element 51N
9
Pickup of element 50N
10
Trip of element 50N
54
REF 610
REF 610
Feeder Protection Relay
Operator's Manual - ANSI Version
1MRS755539
