SECTION
10-
Type SST Overcurrent Trip Device (Cont.)
1 0.4.1
SST TEST SET
The TAK-TS1 and TAK-TS2 Test Sets are portable in
struments designed for field-checking the time-current
characteristics 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 addi
tion, includes means for continuity checking the phase
sensors. A TAK-TS1 Test Set is shown in Fig. 67. The
TAK-TS2 functions identically to and supersedes the
TAK-TS1 device. The TAK-TS2 can also test the Ver
saTrip Mod 2 trip device.
WARNING:
BEFORE CONNECTING THE TEST SET
TO THE BREAKER TRIP DEVICE S YSTEM, EN
SURE THAT THE CIRCUIT BREAKER IS COM·
PLETEL Y DISCONNECTED FROM ITS POWER
SOURCE. ON DRAWOUT EQUIPMENT, RACK THE
BREAKER TO ITS DISCONNECTED POSITION.
VERIFY THAT THE BREAKER IS TRIPPED.
Either of two test modes may be employed:
"A" -
Unit
These tests are con
ducted with the programmer unit disconnected from the
breaker. During test, the unit can remain attached to the
breaker or may be completely removed from it.
CAUTION:
NEVER DISENGAGE THE HARNESS
CONNECTOR FROM THE PROGRAMMER UNIT
ON A BREAKER THAT IS ENERGIZED AND CARRY
ING LOAD CURRENT. THIS WILL OPEN-CIRCUIT
THE CURRENT SENSORS, ALLOWING DANGER
OUS AND DAMAGING VOLTAGES 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 pro
grammer units so equipped.
"8"
-
For these tests,
the programmer un1t must be mounted on the breaker and
connected to 1ts wiring harness.
Test scope •
1 .
All "A"
tests prev1ously
described, plus provision for
optionally
swrtchrng the programmer's output to activate
the Flux· Shlft Tnp Device and verify its operation by physi
cally tnppmg the breaker.
2. Check phase sensor continuity.
In the event that any component of the SST system does
not perform wrthrn the limits prescnbed
m
test instructions
GEK-64454 . 1t should be replaced .
52
1
0.4.2
RESISTANCE VALUES
For use in troubleshooting, the Common to Tap resist
ance for SST current sensors is given in Table 8. These
values apply to both phase and neutral sensors.
TABLE
8 -
SENSOR RESISTANCE VALUES
Resistance In Ohms
Ampere
between COMMON
TAP
and TAP Terminals
1 00
2.2 - 2.6
1 50
3.3 - 3.9
225
5.1 - 5.8
300
6.8 - 7.8
300
5.3 - 6.1
400
7.2 - 8.2
600
1 0.8 - 1 2.4
800
1 4.6 - 1 6.9
600
6.4 - 7.6
800
8.8 - 1 0.4
1 200
1 3.5 - 1 5.8
1 600
1 9 .4 - 22.8
800
1 0.2 - 1 2.4
1 200
1 5.8 - 1 9.2
1 600
22.0 - 26.7
2000
28.5 - 34.7
The coil resistance of the SST /ECS Flux shifter device is
approximately 1 6 ohms.
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