Functions; Test Functions; Trip Test; Protection Functions Test - ABB SACE PR010/T Instructions Manual

4. Functions

4.1 Test Functions

The SACE PR010/T test unit tests protection units by monitoring both their HW and SW
components. In particular, the unit performs the following tests:
• Trip test: by means of SACE TT1 unit

• Protection functions test

• Communication functions test
4.1.1

Trip test

The trip test tests the operation of the microprocessor, release and opening solenoid chain.
The trip test may also be performed with the circuit breaker on.
This test is performed by means of SACE TT1 unit.
WARNING
For safety reasons, the current flow inside the circuit breaker must be zero
during testing.
For this reason, the current flow is automatically monitored before testing and registered as zero if
the reading detected is below a preset value.
4.1.2 Protection functions test
The device under test is powered up and the fault condition for the protection function to be tested
is simulated. In case of units provided with internal bus, the internal status of the protections
(alarm and trip messages etc.) may also be monitored.
In case of certain releases, the type of release and circuit breaker and the rated current of the CTs
installed are also automatically identified.
WARNING
For safety reasons, protection function tests must only be performed with
the circuit breaker off.
These tests may be performed in both automatic and manual mode.
• Automatic mode: releases equipped with internal bus (see electrical diagrams in the
Technical Catalogue) are automatically tested. The PR010/T unit is in fact capable of self-
learning the protection parameter settings and, based on these parameters, of generating a fault
signal for each function in order to test the timing. In the event of an anomaly, the type of error
detected is indicated by the corresponding message (threshold or timing error). This sequence
is automatically repeated on all protection unit functions. Testing may be interrupted at any
time using the STOP button, thereby restoring the original conditions/settings of the
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