ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. C
7-16
Test Faults disclosed
Injection of rated value at all c.t. and v.t.
inputs (e.g. using test set Type XS 92b)
Hardware defective
Wrong rated current
Wrong rated voltage
Wrong reference value
Activation/deactivation of all binary in-
puts (opto-couplers)
Hardware defective
Incorrect setting
(not inverted)
Incorrect assignment
Energisation of all auxiliary tripping re-
lays (using the test function)
Hardware defect
Incorrect assignment
Energisation/de-energisation of all aux-
iliary signalling relays (using the test
function)
Hardware defect
Incorrect assignment
A further useful facility is provided by the “Display analogue val-
ues” menu which enables the currents and voltages applied to
the protection to be viewed. It can thus be seen whether the am-
plitude and phase of the currents and voltages are correct. The
Appendix in Index 12 includes a test report.
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