8. If the VFI assembly being tested has a flux-shift tripper
mounted on the A-Phase mechanism, place the Phase
Selector switch into the A-PHASE position. If it does
not, proceed to step 11.
9. Energize the tester by setting the power switch to ON.
10. Press the Tripper Test button. The A-Phase flux-shift
tripper in the pad-mounted unit should operate
immediately.
11. Place the Phase Selector switch into the B-PHASE
position.
12. Press the Tripper Test button. The B-Phase flux-shift
tripper in the pad-mounted unit should operate
immediately.
13. If the VFI assembly being tested has a flux-shift tripper
mounted on the C-Phase mechanism, place the Phase
Selector switch into the C-PHASE position. If it does
not, proceed to step 15.
14. Press the Tripper Test button. The C-Phase flux-shift
tripper in the pad-mounted unit should operate
immediately.
15. De-energize the tester by setting the power switch to
OFF.
16. Disconnect the 14-pin male connector end of the
tester interrupter interface cable (Item 1) from the
14-pin female end of the pad-mounted cable (Item 2)
originating from the front plate of the VFI unit under
test.
17. Reconnect the VFI control cable (Item 2) to the
receptacle located upon the TPG control enclosure.
18. Disconnect the interrupter and control interface cable
(Item 1) from the VFI tester and store the cable in the
storage compartment located in the cover of the VFI
tester.
19. Using a hotstick, close in all three phases on the pad-
mounted unit.
INPUT
POWER
120 VAC
TEST
CONTROL
RESET
TEST
Power Systems
BATTERY
CONNECTOR
CONTROL
EXTERNAL
INTERNAL
TO CONTROL
TO INTERRUPTER
PHASE SELECT
TEST SELECT
METER JACKS
CURRENT
TRIPPER TEST
BATTERY TEST
4-30A
30A
60A
120A
240A
1X
4-30A
2X
CONVENIENCE
OUTLET
120 VAC
C-PHASE TRIPPER
B-PHASE TRIPPER
A-PHASE TRIPPER
TEST
TRIPPERS
TRIPPERS
Tester
VFI
ON
ON
ON
ON
ON
AØ
BØ
CØ
Item 1
Interrupter
Interface
Cable
14-pin male
connector at
cable end
14-pin female
connector at
cable end
Item 2
VFI
Control
Cable
TPG
Control
Enclosure
Figure 6. Connection of the VFI tester to side-hinged
VFI units with TPG controls for external flux-shift tripper
test.
Operating Instructions
MN285001EN December 2018
18
