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5–11
Testing – 5
27 Phase Undervoltage, 3-Phase (#1 or #2)
VOLTAGE INPUTS
:
Configuration V1
CURRENT INPUTS
:
None
TEST SETTINGS
:
Pickup
P
%
(4 to 100)*
*(
Of Nominal Voltage)
Time Delay
D
Cycles
(1 to 8160)
Programmed Outputs
Z
OUT
(1 or 2)
Function 27 (#1 or #2)
Disable
(see Note, below)
Functions 25, 60FL, 79
Disable
Q
Q
Q
Q
Q
NOTE
: If 27 #1 and 27 #2 have different pickup settings, it would be efficient to disable the one with the
higher setting first and test the lower setting operation. The higher setting operation could then be
tested without disabling the lower setting.
1.
Disable functions as shown. See Section 3.2, Setpoints and Time Settings, for procedure.
2.
Confirm settings to be tested.
3.
Connect inputs in Configuration V1 designated above. See Section 5.1, Equipment/Test Setup for
configuration. Set at Nominal Voltage (see Table A-3, System Setup Record Form).
4.
Pickup Test
: Hold the
TARGET/OUTPUT RESET
pushbutton in and slowly decrease the input
voltage on phase A until
PHASE UV 27
LED light illuminates (or the pickup indicator operates on
the Function Status screen). The voltage level should be equal to
P
&
0.5 V or
&
0.5 %. Release
the
TARGET/OUTPUT RESET
pushbutton and increase the input to the nominal voltage. Press
TARGET/OUTPUT RESET
pushbutton to remove targets.
5.
Time Test
: With output contacts
(Z)
connected to stop the timer, apply approximately (
P
– 5) %
and start timing. The contacts will close after
D
cycles 20 cycles (RMS), or
&
2 cycles
(DFT).
6.
Test phases B and C (or AB, BC in case of Line-Line VT configuration) by repeating Steps 4 and
5.
7.
If testing is complete, enable any functions disabled for this test. If other tests are to be
completed, check the proper functions to disable for the next test and proceed from this
configuration.
Summary of Contents for Syncrocloser M-3410A
Page 1: ...Instruction Book M 3410A Intertie Generator Protection Relay ...
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Page 71: ...M 3410A Instruction Book 2 28 This Page Left Intentionally Blank ...
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Page 161: ...1 3 A B C M 3410A Instruction Book 4 40 This Page Left Intentionally Blank ...
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