Sst Test Set Tak-Tsl - GE AKR-4-30 Maintenance Manual Supplement

GEI-86134, Power Circuit Breakers
USING THE SST TEST SET
The TAK-TSl Test Set is a portable instrument
designed for field-checking the time-current char­
acteristics and pickup calibration of the SST's
various trip elements. It can verify the ability of
the Flux-Shift Trip Device to trip the breaker and,
in addition, includes means for continuity checking
the phase sensors.
WARNING:
BEFORE CONNEC TING THE
TEST SET TO THE BREAKER TRIP DE­
VICE SYSTEM,
CIRCUIT BREAKER
DISCONNECTED
SOURCE. ON DRA WOUT EQUIPMENT,
RACK THE BREAKER TO ITS DISCON­
NECTED POSITION. VERIFY THAT THE
BREAKER IS TRIPPED.
Either of two test modes may be employed:
"A" - Programmer Unit Only.
from the breaker. During test, the unit can remain
attached to the breaker or may be completely re­
moved from it.
18
Fig. 21. SSTjECS test set, cat.
ENSURE THAT THE
IS COMPLETELY
FROM ITS POWER
These tests are
no.
TAK-TSI
CAUTION:
NEVER DISENGAGE
HARNESS CONNECTOR FROM THE PRO­
GRAMMER UNIT ON A BREAKER THAT
IS ENERGIZED AND CARRYING LOAD
CURRENT. THIS WILL OPEN-CIRCUIT
THE CURRENT SENSORS,
DANGEROUS AND
AGES TO DEVELOP.
Test scope:
1. Verify the time-current characteristics and
pickup calibration of the various trip elements.
2. Verify operation of the SST target indicators
on programmer units so equipped.
" B" - Complete Trip Device System.
tests, the programmer unit must be mounted on
the breaker and connected to its wiring harness.
Test scope:
1. All "A" tests previously described, plus pro­
VlS10n for optionally switching the programmer's
output to activate the Flux-Shift Trip Device and
verify its operation by physically tripping the
breaker.
2. Check phase sensor continuity.
In the event that any component of the SST system
does not perform within the limits prescribed in
test instructions GEK-64454, it should be replaced.
THE
ALLOWING
DAMAGING VOLT­
For these