GE LPS-D, Instruction Manual, Page: 203 / 436

GE Power Management LPS-D Line Protection System 6-
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6 FUNCTIONAL TESTS (USER SETTINGS) 6.1 LPS-D FUNCTIONAL TESTS
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6 FUNCTIONAL TESTS (USER SETTINGS) 6.1 LPS-D FUNCTIONAL TESTS 6.1.1 DESCRIPTION
Power down the relay, either with the power switch or by removing a connection plug, before
removing or inserting modules. Failure to do so may permanently damage the relay.
This chapter contains formulas for the calculation of pickup currents and voltages for testing the LPS-D with
settings specific to a particular application. The test circuits and procedures are the same as used and illus-
trated in Chapter 4: ACCEPTANCE/PERIODIC TESTS.
The customer must determine the extent of the testing to be performed. These tests are intended as guides;
they are not required for every periodic test of the relay. The desired test procedures can be incorporated into
the standard test procedures. However, it is suggested that the relay's built-in self tests be incorporated into
the test procedures, since they test the operational status of the unit.
It is assumed in what follows that you are familiar with LPS-D testing. If not, refer to Chapter 4: ACCEPTANCE/
PERIODIC TESTS for details.
a) GENERAL TESTS
• T1 – LUI Status Test (Built-In Self Tests)
• T2 – LUI Display Test (Built-In Self Tests)
• T3 – Digital Output Test
• T4 – AC System Input Test
b) MEASURING UNIT TESTS
• T5 – IT Detector Test
• T6 – IB Detector Test
• T7 – Ground Directional Trip Test, IPT + NT
• T8 – Ground Directional Block Test, IPB + NB
c) BACKUP PROTECTION TESTS
• T9 – Phase Instantaneous Overcurrent 50
• T10 – Ground Instantaneous Over-current 50G
• T11 – Ground Time Over-current 51G
d) ZONE GROUND / PHASE REACH MEASURING UNITS
• T12 – Zone1 Ground Reach M1G
• T13 – Zone2 Ground Reach MTG
• T14 – Zone3 Ground Reach M3G
• T15 – Zone4 Ground Reach M4G
• T16 – Zone1 Phase Reach M1
• T17 – Zone2 Phase Reach MT
• T18 – Zone3 Phase Reach M3
• T19 – Zone4 Phase Reach M4
CAUTION