SECTION 1 0-Type SST Overcurrent Trip Device (Cont.)
1 0.4.1
SST TEST SET
The TA K-TS1 and TA K-TS2 Test Sets are portable in
struments desig ned for field-checking the t i me-cu rrent
characteristics and pickup cali brat ion of the SST's
various trip elements.
Fl ux-Sh ift Trip, Device to tri p the breaker and, i n addi
t i o n , incl udes means for cont i n u ity che . cking t h e phase
sen sors. A TAK-TS1 Test Set is shown in Fig. 67. The
TAK-TS2 functions identical ly to and supersedes the
TAK-TS1 device. The TAK-TS2 can also test the Ver
saTrip Mod 2 tri p device.
WARNING :
BEFORE CONNECTING THE TEST SET
TO THE BREA KER TRIP DEVICE S YS TEM, EN
SURE THA T THE CIRCUIT B REAKER IS COM
PLETEL Y DISCONNEC TED FROM I TS PO WER
SOURCE. ON DRA WO UT EQUIPMENT, RACK THE
B R EA KER TO I TS DISCONNEC TED P OSITION.
VERIFY THA T THE BREA KER IS TRIPPED.
Either of two test modes may be employed:
"A" - Programmer Unit O nly. These tests are con
ducted with the programmer unit discon nected 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 THA T IS ENERGIZED AND CAR R Y
ING LOAD CURRENT. THIS WILL OPEN-CIRCUIT
THE CURRENT SENSORS, ALL O WING DANGER
OUS AND DAMAGING VOLTA GES 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
grammer units so equipped.
-
"B"
the programmer unit must be mounted on the breaker and
connected to its wiring harness.
Test scope:
1 . All "A" tests previously described, plus provision for
optionally switching the programmer's output to activate
the Fl ux-Shift Trip Device and verify its operation by physi
cally tripping the breaker.
2. Check phase sensor conti nuity.
In the event that any component of the SST syste m does
not perform within the limits prescribed in test instructions
G EK-64454 , it should be replaced.
52
It can verify the abil i ty of the
indicators on pro
1 0.4.2
R ES ISTANCE VAL U ES
For use in troubleshooting, the Common to Tap resist
ance for SST cu rrent sensors is given in Table 8. These
values apply to both phase and neutral sensors.
TABL E 8 - SENSOR R ESISTANCE VALUES
Ampere
TAP
1 00
1 50
225
300
300
400
600
800
600
800
1 200
1 600
800
1 200
1 600
2000
The coil resistance of the SST/ ECS Flux shifter device i s
approximately 1 6 ohms.
Resistance i n Ohms
between COMMON
and TAP Termi nals
2 . 2 - 2.6
3 .3 - 3.9
5 . 1 - 5 . 8
6.8 - 7.8
5.3 - 6 . 1
7.2 - 8.2
1 0. 8 - 1 2 .4
1 4.6 - 1 6.9
6.4 - 7 . 6
8 . 8 - 1 0 .4
1 3 .5 - 1 5 . 8
1 9 .4 - 22.8
1 0.2 - 1 2.4
1 5 .8 - 1 9 .2
22.0 - 26 . 7
28.5 - 34 . 7