Test Of Internal Circuits; Secondary Injection Test; Check Of External Connections - ABB REC 561 User Manual

ABB Network Partner AB
Version 1.0-00

4.1 Test of internal circuits

4.2 Secondary injection
test
4.3 Check of external
connections
Installation and commissioning
Events occurring while the terminal is set in test mode can reported to the
SCS system in these ways:
• All event are reported.
• No events are reported.
• Events are reported according to the event mask.
This selection is made in SMS or in SCS.
The A/D conversion module, the power supply module, the main process-
ing module, the signal processing module, and the In/Out modules are
continuously supervised and internal signals present the result (OK,
Warning, or Failure). If an internal fault is detected, this is indicated on
the built-in MMI. In the front-connected PC or SMS, the fault creates an
event in the internal event list.
The power supply is supervised continuously and if a failure occur, or if
the internal signal INT--FAIL is activated, a special output contact on the
power supply module is activated (Internal fail).
Secondary injection testing is a normal part of the commissioning work of
a terminal with analogue inputs. Check the operating value of all func-
tions. The test set should be able to provide a three-phase supply of volt-
ages and currents. The magnitude of voltage and current, and the phase
angle between voltage and current must be variable. The voltages and cur-
rents from the test set must be obtained from the same source, and they
must have a very small harmonic contents. If the test set cannot indicate
the phase angle, you need a separate phase-angle meter.
The time-lag elements need not be switched off to record the operating
characteristic for the different zones, because operation for each zone can
be read as indications on the MMI.
Note that this terminal is designed for a maximum continuous cur-
rent of four times the nominal current.
When a line terminal will go into service, you must check that the
intended voltages and currents reach the relay. Also check the phase
sequence and identify each phase in both the voltage and the current cir-
cuits.
Firmly tighten all screw terminals.
COMBITEST test switch RTXP 24
The terminal can be equipped with a test switch of type RTXP 24. The test
switch and its associated test plug handle (RTXH 24) are a part of the
COMBITEST system, which is described in Buyer's Guide COMBITEST
Test system (1MRK 512 001-BEN).
1MRK 580 166-XEN
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