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Table 1. Description and Functionality of VFI Tester Front Panel Features
Item No.
(Figure 1)
Description
Purpose and Use
1
VFI Cable Connector
Interface for External VFI Switch Connector Cable
2
Multi-meter Connection Jacks
Measurement of Injection Current Levels
3
Battery Test Terminals
Interface for Battery Test cable
4
Battery Test Switch
Initiates battery test
5
Power Switch
Energizes 120 VAC input to tester
6
AC Power Receptacle
Interface for 120 VAC Power Cable
7
Cooling Fan Intake Port
Unit Cooling
8
Cooling Fan Exhaust Port
Unit Cooling
9
GFI Convenience Outlet
120 VAC, 3 A Ground Fault Protected Outlet for auxiliary power for meters, etc.
10
Tripper Test Switch
Verification of Internal Tripper Operation
11
C-Phase Flux Shift Tripper
Actuates when control board under test issues trip signal
12
B-Phase Flux Shift Tripper
Actuates when control board under test issues trip signal
13
A-Phase Flux Shift Tripper
Actuates when control board under test issues trip signal
14
Control Cable Receptacle
Interface for Tri-Phase/TPG Control Test Cable
15
Phase Select Switch
Selection of phase to be tested
16
Testing Mode Selector Switch
Selection of either external test of flux-shift trippers within VFI unit under test, internal self-check of
flux-shift trippers within VFI tester, or general Tri-Phase/TPG Control Test Mode
17
LED Display
Displays Test Data and Tester Status Information
18
30 A Current Adder Switch
Operation of switch adds 30 A of test current to total output of Tester Unit
19
60 A Current Adder Switch
Operation of switch adds 60 A of test current to total output of Tester Unit
20
120 A Current Adder Switch
Operation of switch adds 120 A of test current to total output of Tester Unit
21
240 A Current Adder Switch
Operation of switch adds 240 A of test current to total output of Tester Unit
22
1X/2X Current Multiplier Switch
Multiplies Designated Current Levels by a factor of two
23
4-30 A Fault Current Rheostat
Provides variable adder of 4-30 A Fault Current Level to total output of Tester Unit
24
4-30 A Rheostat Enable Switch
Enables operation of 4-30 A Fault Current Rheostat (Item 23)
25
Fault Test Switch
Initiates injection of simulated fault current to VFI control
Operating Instructions
MN285001EN December 2018
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