GEI-86134, Power Circuit Breakers
Fig. 21.
SSTjECS test set, cat.
no.
TAK-TSI
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 CONNECTING THE
TEST SET TO THE BREAKER TRIP DE
VICE
SYSTEM, ENSURE THAT
THE
CIRCUIT BREAKER IS COMPLETELY
DISCONNECTED
FROM
ITS
POWER
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. These tests are
programmer unit disconnected
from the breaker. During test, the unit can remain
attached to the breaker or may be completely re
moved from it.
18
CAUTION:
NEVER DISENGAGE
THE
HARNESS CONNECTOR FROM THE PRO
GRAMMER UNIT ON A BREAKER THAT
IS ENERGIZED AND CARRYING LOAD
CURRENT. THIS WILL OPEN-CIRCUIT
THE CURRENT SENSORS,
ALLOWING
DANGEROUS AND DAMAGING VOLT
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. For these
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.
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