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6.5 Function Test
CAUTION
The function test may cause the output relays to operate including the tripping output relays.
Therefore, the test must be performed with tripping circuits disconnected.
6.5.1
Measuring Relay Element
Measuring relay element characteristics are realized by software, so it is possible to verify the
overall characteristics by checking representative points.
Operation of the element under test is observed by the binary output signal at monitoring jacks A
or B or by the LED indications above the jacks. In any case, the signal number corresponding to
each element output must be set on the "Logic circuit" screen of the "Test" sub-menu.
T e s t - L o g i c c i r c u i t
T e r m A
T e r m B
When a signal number is entered for the TermA line, the signal is observed at monitoring jack A
and when entered for the TermB line, observed at monitoring jack B. See Section 4.2.7.3.
Note:
CAUTION
• Use test equipment with more than 1 k Ω of internal impedance when observing the output
signal at the monitoring jacks.
• Do not apply an external voltage to the monitoring jacks.
In case of a three-phase element, it is enough to test a representative phase. A-phase and AB-phase
elements are selected for the earth fault element and phase fault element respectively hereafter.
Further, the [APPL-CT] and [APPL-VT] settings are selected "3P" and "3PV".
Note: Operating time test of measuring relay elements at monitoring jack A or B is not
including the operation of binary output. Whole the operating time test, if required,
should be measured at a binary output relay.
# # # #
# # # #
The voltage level at the monitoring jacks is +5V ±1V for logic level "1" when measured by an
instrument with 10kΩ input impedance, and less than 0.1V for logic level "0".
2 5 / F e b / 2 0 0 3 0 9 : 4 5
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6 F 2 S 0 8 4 2
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