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IPC402x-UM-2209-1-2.x.x (en)
Ensto Protrol AB
Phone: +46 31 45 82 00
Alfagatan 3
internet: www.protrol.se
431 49 Mölndal, SWEDEN
61
e-mail: [email protected]
7.
To test overcurrent and earth fault detector functions:
a.
Inject current with a one or three phase instrument. Check the indications for each
function of the front panel of the device, in the
Site
manager
, in the
Event
log and,
if possible, in the remote control end. See Figure 18.
Figure 18.
Current injection in two opposing phases.
b.
With a current connected in counter phase to two inputs, both overcurrents and
earth faults can be verified. For testing of earth faults, typically apply 0.5 A and
then short-circuit one of the phases swiftly on a terminal or directly on the plug-in
contact of the device.
c.
If no current injection instrument is available and if the station is in operation with
measurable currents, a simple test of the earth fault detector can be performed by
short-circuiting a phase briefly on the terminal.
d.
If it is not possible to apply voltage/current on the inputs and there is no load
current available, one can use simulated signals to verify the logical connection to
the remote control center.
On the tab
System
it i
s possible to activate the function for testing signals to the
remote control center by pressing the button
Activate remote signal test
.
The following text is shown:
A new column,
Remote signal test,
is then added to the object settings for binary
inputs on the tabs
Binary Inputs/Input 1-16
and
Binary Inputs/Detector m
.
IPC
Current
Source
1 A