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Introduction
The Type TVTS1 Test Set is a portable instrument de-
signed for the field testing of MicroVersaTrip'" solid-state
programmers. The complete trip system is comprised of the
following components:
1 Solid-state programmer
2.
Phase Current Sensors
3.
Flux Shift Magnetic Trip Device
4.
When applicable, a Neutral Sensor for units containing
a Ground Fault trip element.
All components, except the Neutral Sensor, are integrally
mounted in the circuit breaker. When used, the Neutral Sen-
sor is separately mounted in the bus or cable compartment
of the switchgear. In drawout construction, it is automati-
cally connected to the programmer in the breaker via a
drawout secondary disconnect block.
Two basic types of solid-state programmers will be
tested. See Fig. 1.
The Test Set is used to perform various programmer tests
in two basic modes:
Testing the Solid-state Programmer Only-Mode "1"
Testing the Complete Trip System-Mode "2"
WARNING: THESE TESTS CAN BE CONDUCTED
ONL Y ON A DE-ENERGIZED BREAKER-ONE
WHICH IS COMPLETEL Y DISCONNECTED
FROM ITS PRIMARY AND CONTROL POWER
SOURCES.
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MicroVersaTrip®
TP4VT, TP9VT,
T AVT programmers
Fig_ 1
MicroVersaTrip®
T4VT programmer
Testing the Solid-state Programmer
Only-Mode "1"
A test mode is used where only the solid-state program-
mer is tested, and is particularly useful in testing spare or
alternate programmers.
It should be noted however, that there can be no substi-
tute for complete testing of the trip system per Mode "2".
See Fig. 5. Since the programmer is only a part of the com-
plete trip system, the PROGRAMMER ONLY tests should be
recognized as only a partial system test.
Test Scope
1.
Verify the time-current characteristics and pickup cali-
bration of the various trip elements.
Designations for the trip elements are abbreviated as fol-
lows:
LT -LONG TIME
INST.-INSTANTANEOUS
ST -SHORT TIME
GF-GROUND FAULT
2. Verify performance of the ZONE SELECTIVE INTER-
LOCKING functions on programmers so equipped.
3.
Verify the integrity of key electronic components in the
solid-state programmer.
4.
Verify operation of the Fault Trip annunciators on pro-
grammers so equipped.
Testing the Complete Trip System-
Mode "2"
For these tests, the programmer is connected to the
breaker through the test set.
Test Scope
1. All programmer tests previously described, plus the
provision to optionally switch the programmer's output to
activate the Flux Shift Magnetic Trip Device to verify its op-
eration by physically tripping the breaker.
2. Check continuity of the Phase Sensors .
Applicable Time-current
Curves
GES 6198-Four-function (T4VT; TP4VT)
MicroVersaTrip'" : LT; ST; INST.
GES 6199-Full-function MicroVersaTrip'" : LT; ST; INST,
GES 6195-Ground Fault
Specifications
Input: 105-125 Vac, 50/60 Hz
Power Consumption: 60 Watts
Weight: 30 Pounds
Overall Dimensions (Inches): 22% L x 12% W x 9'/8 H
3
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