FT & RT
TEST SWITCHES
KEY BENEFITS
The FT Switches and FT Test Plugs have all the features necessary for applications involving the measurement of individual
currents and voltages to facilitate testing of substation instrumentation and protection devices from the front of the panel.
The make before-break current short circuit feature allows test personnel the convenience of isolating equipment from current
transformer circuits.
Voltage measurements can be made directly on the FT Switch without disturbing existing connections. There is a test clip provision
located on the top of each pole that allows connection with standard spring clip test leads.
APPLICATIONS
FT Test Switches:
The ITI FT Test Switches and Test Plugs provide a safe, simple, immediate and reliable method to isolate equipment and measure
system current and voltage during field testing and commissioning.
RT Rack Mount Test Switches:
RT Switch assemblies for rack and switchboard mounting permit convenient isolation of switchboard relays, meters and
instruments. RT racks allow quick and easy multi-circuit testing by conventional test methods and for faster installation into
switchgear.
FEATURES
FT Test Switch:
• Built with a maximum of ten individual poles, of potential,
current, and current shorting switch units
• Switches can be assembled in a variety of different
arrangements to match customer requirements
• FT Test plugs are used in conjunction with the FT Switches
to enable easy measurement, calibration, verification or
maintenance of relays, meters and instruments
• UL / cUL E101598
Protection:
• With the cover in place, a meter type seal can be placed
through either of the cover studs of the FT Switch to
prevent unauthorized access
• Standard black cover mounts only when all switches are
in the closed position
• A clear cover is available that can be installed with the
switchblades in the open or closed position
Energy
g
RT Rack Mount Test Switches:
• RT Switches accommodate three FT switches mounted
on a 19” wide steel mounting panel (Brushed aluminum
available)
• Provides up to 30 terminals with three FT combinations
• Color and finish can be customized
• Optional rack heights for label applications
• Each panel is supplied with the hardware to mount the RT
assembly to the 19” rack enclosure
• The RT assembly will support an FT style test plug
• Full-length clear cover is standard. Full length black cover,
individual clear covers, and individual black covers are
available
• UL / cUL E101598
Protection:
• Once the full-length clear cover on the RT switch is
installed, it prohibits access to some of the rack mounting
screws
• Individual clear covers offer additional protection
consistent with common testing procedures to ensure
only correct switch is exposed during testing
1
FT & RT Test Switches
FT PAGE.pdf 1 1/24/2012 11:35:32 AM
FT Specifications
Rating
The standard FT switch is rated at 600 volts and 30 Amps. The
Switch meets or exceeds all requirements of ANSI / IEEE Standard
C37.90 and is UL and cUL recognized.
Mounting
FT Switches are designed for semi-flush mounting on the front of
switchboard panels, facilitating inspection and accessibility.
Drilling Plan - Inches
Fasteners
Captive fasteners are made of molded plastic with a threaded brass
insert for easy cover installation and removal.
Switch Poles
FT Switches are available in configuration of 1 to a maximum of
10 individual poles or switch units. Each pole identified by letter (A
thru J), which is visible along the top of the base from left to right.
The individual switch units are of knife blade type. There are three
different types of switch units available: potential, current, and
current shorting.
Blade assembly of two position pole “C-C” (outside of base)
FT Switch Construction
The base of the FT Switch is made of black electrical grade plastic
material which provides a tough insulated enclosure. Barriers are
molded into the base (front and rear) to separate the switch units
from one another. The barriers provide insulation between poles and
ample space between terminals.
Cover
FT Switches come with a black opaque cover or a clear see-through
cover. Switch covers provide a tough insulated enclosure for the
switch and are made from plastic material. The clear cover affords
the user the option of leaving switch handles in the open position
and replacing the cover while maintaining the provision for a meter
type seal when some or all switch handles are in the open position.
This feature allows the user to service electrical equipment while still
complying with OSHA lockout/tag-out procedures. The clear cover
can be ordered separately for retrofit to existing FT Switches. RT
racks come standard with a full length clear cover and can be sealed
with a meter seal.
Switch Handles
Switch handles are made of a molded plastic insulating material
typically black in color. Red handles can be supplied by replacing
the “P” with “T” for potential handles and replacing “C” with “R” for
current handles. Additional colors are available upon request.
Each handle has a dovetail indentation to hold a circuit identification
label (by others). Knife blade switches can be operated independently
or ganged together with a horizontal interlocking bar (see page 4).
A hole runs through the middle of each switch handle to allow
insertion of interlocking bars. 2 to 10 switch handles can be
mechanically tied together.
Terminals
Connection terminals are located at the rear of the switch and can
be either screw or stud type. Terminals are numbered 1 thru 20 for
easy identification. Each pair of numbered terminals is associated
with a matching pole designated by a letter on the front of the switch.
FT switch terminals 1 thru 20 (rear view)
222
FT & RT Test Switches
FT Test Plugs
The Test Plug with a maximum of 10 positions is designed to match
the pole configuration of specific styles of FT Switches. Not every
switch configuration is suitable to accept a Test Plug. For available
styles, see switch selection tables.
10-Pole “In-Service Series” Test Plug Inserted into FT Test Switch
In-Service Series Test Plug
Provision is made only on current poles with shorting springs to
automatically short-circuit current transformer circuits when the
knife switches are opened prior to inserting the Test Plug.
This Test Plug is typically used to connect devices measuring the
currents and voltages being applied to the switchboard relays, meters
and instruments without interrupting or short-circuiting the circuit.
Only the current test switches with the current jack must be opened
before inserting the Series Test Plug. Connections to the test plug must
be made before inserting the test plug into the FT Switch. Before
inserting the Test Plug, all switchblades that are opposite bi-conductor
paddles must be placed in the full open position.
Single Pole Current Test Plug with Open
Secondary CT Protection
• HelpsreduceriskofhighvoltagesassociatedwithopenCT
secondary
• Reducesrisksduetooperatorerror,incorrectequipmentsettings
and deviation from correct test procedures
• Addssafetyforoperatorsandtechnicians
• Providesasimple,fastandreliablemethodtoisolateandservice
installed meters, relays and CT’s
How it works
If a CT opens during operation:
• TestplugshortstheCTsecondarytohelpreducetheriskofover-
voltage conditions for personnel and equipment
• RedLEDprovidesvisualindicationofanopenCTsecondary
circuit causing an over-voltage condition
Features
• Ergonomichand-helddesignallowsin-servicecurrent
measurement with an ammeter
• Ratings:600V,20Acontinuous
• LEDindicationofover-voltageprotectionoperation
• DesignedforusewithITIFTtestswitch
• AvailablewithorwithoutCTopensecondaryprotection
• ANSI/IEEEC37.90standards
10-Pole “In-Service Series” Test Plug
Ordering Information:
Catalog Number Open Circuit CT Protection
SPTP-01 Yes
SPTP-02 No
333
FT & RT Test Switches
Non Standard FT Style Switch Selector
Step 1
• TheSwitchbodycansupport1to10polesinslotmarkedA
through J
• Enteraletterfromthelegend.Leaveunusedslotsblank
Position:
Excample:
P C - - C R C R - - R P P P
Legend:
P=Potential, Black
T=Potential, Red
C=Current, Non-shorting, Black
C-C or C-C-C- or C-C-C-C = Current , Shorting, Black
R = Current, Non-shorting, Red
R-R, R-R-R, R-R-R-R = Current, Shorting, Red
Additional colors available - See page 11
(Note: Some functions will require more than one slot in the
switch body)
Step 2
(Optional)
If a tie bar is required then check this box
and draw a dark heavy line over the poles to be joined.
(In the example shown in Step 1 positions H, I and J will operate
together.)
Step 3
Select a cover style
Clear (installs over open and closed switch blades)
Black (installs over closed switch blades only)
Step 4
Select a rear terminal type
Screws (Standard) Studs (Optional)
FACTORY USE ONLY
Catalog Number Assignment
444
Catalog Number for FT Style Switches
FT C - 074 S
Cover
Black -------- (Blank)
Clear -------- C
Configuration
See website,
GEDigitalEnergy.com
Also on pages 8-11
Terminals
Screws ------ (Blank)
Studs -------- S
FT & RT Test Switches
Catalog Number for RT Style Rack Mount Switches
2 3
1
4
Left Center Right
5 6
8 9 10 11 12 13 14
7
R T 2 G G 0 6 6 0 8 4 1 2 5
RT-19” Rack
Terminal
Connectors
*Screw ---------- T
Stud ----------- S
Panel Height (ref pg 7)
2 - 2 rack unit centered
3 - 3 rack unit centered
X - 3 rack unit low
H - 3 rack unit high
4 - 4 rack unit low
5 - 4 rack unit centered
6 - 4 rack unit high
Color
*ANSI 61 ------- G
ANSI 70 ------- A
Brush Al ------- B
Black ------- X
Cover
Full Length Clear ------------------ G
3 Individual Clear Covers --------- A
3 Individual Black Covers --------- B
Position # (As viewed from front)**
Left
Center
Right
000 = Blank
* Denotes standard features
** See pages 8 thru 11 for 3 digit codes or go to “Configure a FT Switch” at GEDigitalEnergy.com/ITI
555
FT & RT Test Switches
Dimensional Drawing - Type FT Test Switch
Black cover and threaded stud terminals
Clear cover and screw terminals
Typical FT Switch Connection Schematic using an FT-076 switch
666
Dimensional Drawing - Type RT Mounting Racks
FT & RT Test Switches
777
FT & RT Test Switches
Configuration Selection Chart
INDIVIDUAL
FT SWITCH
NUMBER
-001
-002
-003
-004
-005
-006
-007
-008
-009
-010
-011
-012
-013
-014
-015
-016
-017
-018
-019
-020
-021
-022
-023
-024
-025
-026
-027
-028
-029
-030
-031
-032
-033
-034
-035
-036
-037
-038
-039
-040
-041
-042
-043
-044
-045
-046
-047
-048
-049
-050
POLES
TOTAL
2
2
2
2 0
2
4
4
4
V
A
2
0
0
2
0
2
2
0
2
4
0
4
0
4
0
4 04
2
4
22P
2
4
0
0
5
3
3
1
0
6
6
6
4
3
2
0
0
0
0
0
7
7
7
7
7
5
5
5
4
3
3
3
8
8
6
6
4
4
4
4
4
0
2
2
4
5
0
0
0
2
3
46P
6
6
6
6
0
0
0
0
0
2
2
2
3
4
4
4
0
0
0
2
2
4
4
4
4
4 0
5
5
5
5
5
6
6
6
6
6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
7
7
7
7
8
8
8 8
8
8
8
8
8 44 P
P=POTENTIAL
A
P
B
P
C
P
P
P
P
P
P
P
C
C
P
P
P
P
P
C
C
C
P
P
P
P
P
P
P
C
C
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
C
P
P
P
C
P
P
P
P
P
P
P
P
P
P
P
P
SWITCH CONFIGURATION
C=CURRENT (NON-SHORTING)
*
C
D
E
P
C
P
PP
C C
C C
C
C
C P
C
C
P
P
C
C
P
P
C
C
C
C
C
C
P
P
P
P
P
P
P
P
P
C
P
P
C
P
C
C
C
C
C
P
P
P
P
C
P
C
P
P
P
P
P
P
P
C
P
P
P
P
P
P
C
C
C
C-C=CURRENT (SHORTING)
*
F
G
H
I
J
TEST PLUG
NUMBER
TP-109
P
TP-109
TP-106
C
C
C
C
P
P
P
P
P
P
PP
C
C
C
C
P
TP-107
TP-101
TP-109
TP-109
TP-109
TP-109
TP-101
TP-101
TP-108
C
C C
C
P
C
P
C
P
P
P
C
C
C
P
P
P
P
P
P
P
C
C
C
C
C
C
C
C
C
C
C
C
C
P
C
C
C
C
P
P
P
P
P
P
P
P
P
P
C
C
C
P
P
C
C
C
C
C
C
C
C
P
P
P
P
PP
C
C
C
C
C
C
C
P
C
CC
P
P
C
C
C
C
C
C
C
P
P
P
P
C
P
P
P
C
C
P
P
P
P
C
P
C
P
PC
P
P
P
P
P
P
C
P
P
P
P
P
P
P
P
P
P
P
P
P
P
TP-102
TP-109
TP-101
TP-108
TP-109
TP-109
TP-109
TP-101
TP-102
TP-102
TP-103
TP-109
TP-109
TP-109
TP-109
TP-109
TP-101
TP-107
TP-106
TP-113
TP-102
TP-102
TP-109
TP-109
TP-109
TP-101
TP-106
TP-102
TP-110
888
Configuration Selection Chart
FT & RT Test Switches
INDIVIDUAL
FT SWITCH
NUMBER
-051
-052
-053
-054
-055
-056
-057
-058
-059
-060
-061
-062
-063
-064
-065
-066
-067
-068
-069
-070
-071
-072
-073
-074
-075
-076
-077
-078
-079*
-080
-081
-082
-083
-084
-085
-086
-087
POLES
TOTAL V A
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
3L
10
10
-088
-089
-090
-091
-092
-093
-094
-095
-096
-097
10
10
9
8
6
6
8
9
9
-098 10 4 6
-099 10 4 6
-100 10 10 0
SWITCH CONFIGURATION
P=POTENTIAL
A B C D E F GHI J
4
4
P
4
4
2
6
2
6
7
1
0
0
0
9
9
6
5
5
3
0
9
8
7
6
6
6
6
4
4
3
2
2
2
1
0
0
4
2
4
2
0
9
2
6
4
0
3
3
P
8
C
8
8
0
P
0
P
3
P
4
P
4
P
6
P
9
C
0
P
1
C
P
2
3
P
4
P
4
P
4
P
4
C
6
P
6
P
7
P
8
P
8
P
8
C
9
C
10
C
10
C
T T T T T T T T T
0
6
P
8
C
7
L
6
P
8
P
10
C
P
0
6
CCC
0
P
2
P P P PC C
C
8
6
P
6
P
C
C
C
C
C
P
P
P
P
P
P
C
P
P
P
P
P
P
C
C
P
P
C
C
C
C
C
P
C
C
P
P
C
P
P
C
P
P
C C
C
C C C C C T T T T
C=CURRENT (NON-SHORTING)
*
C
P
C
C
C
C
C
P
P
P
P
C
P
P
P
P
P
P
C
C
P
C
C
C
CC
C
C
C
P
C
C
P
C
C
P
P P P
P
P P
C
C
C
C
C
C
C
C
C
C
C
C
P
P
P
P
P
P
P
P
C C
C
P
P
P
P
P
C
P
C
C
C
P
P
P
P
P
C
P
P
C
CPCC
C
C
C
C
C
C
CC
C
C
C
P
C
C
C
C
C
C
L C
C
C
C C
C
C C C C
P
C
C
C
C
P
P
C
C
C
C
P
P
P P
P
C
P P
P P
P
C
C
C
C
C
C
C
C
C
C
C
C L
C C
C
P P P P P
C
P
C C CC CC
P
C
C
C
C
C
C
C C C C P P P P
C-C=CURRENT (SHORTING)
*
P
C
C
C
C
C
PPC CC CCC
C
C
C
C
C
C
C
C
C
C
C
C
P
P
P
P
C
C
C
P
C
C
C
C
P
P
C
C
C
C C
C
P
P
C
C
P
C
C
C
C
C
C
C
C
C
C C
C
P
P
C
C
C
C
C
P
C
C
C
C
CC
C
C
C
C
C
C
C
P
P
C
C
C
C
C
P
C
C
C
C
P P
C
C
C
C
P
C C
C
C
C
C
P
C
C
P
C C
CP C
P
P
P
C
P
P
P
P
PC
P
P
P
P
P
P
P
P
P
PC CP
P
P
P
P
C
C
T
C
P
C
C
TEST PLUG
NUMBER
TP-105
TP-102
TP-108
TP-108
TP-111
TP-111
TP-109
TP-109
TP-102
TP-102
TP-103
TP-109
TP-101
TP-102
TP-104
TP-105
TP-112
TP-111
TP-111
TP-112T
TP-114
TP-114
TP-115
P PPP P P P T TP
999
FT & RT Test Switches
Configuration Selection Chart
INDIVIDUAL
FT SWITCH
NUMBER
-101
-102
-103
-104
-105
-106
-107
-108
-109
-110
-111
-112
-113
-114
-115
-116
-117
-118
-119
-120
-121
-122
-123
-124
-125
-126
-127
-128
-129
-130
-131
-132
-133
-134
-135
-136
-137
-138
-139
-140
-141
-142
-143
-144
-145
-146
-147
-148
-149
-150
SWITCH CONFIGURATION
TOTAL
10
10
9
10
7
3
10
9
2
6
POLES
V A
10
0
9
8
0
3
4
3
2
0
P=POTENTIAL C=CURRENT (NON-SHORTING)
A B C D E F G H I J
T
0
10
RRR RRRR RRR
0
TTT T T T TTT
2
*
P
P P PPPP PT
PPP P C C P PPP
7
C-C=CURRENT (SHORTING)
*
C CC CC CC
0
P P P
6
6
P P P C C C C C C
C
C C C C C
0
6
C
C C C C C
10 10 0 PPP P P T P TP P
10 10 0 P PPPP PPPP T
10
10 10 0 TTT T T T TTT
8 P C C C C CC CC T
2
T
10 10 0 P P P T T PPPP P
10 10 0 P PPPPPT T P P
10 2 8 C C CC CC CC
10
8 CC CP C CC CC T
2
T T
8 8 0 T T P PPPPP
10 10 0 T T P P PPPP T T
10 6 4 P P C P CPCPC P
10
8 TT CC CC CC CC
2
10 6 4 CC C TC TTTTT
TTTTTT066
10 4 6 PP PP RR RR RR
10 10 0 O O OOOOOO O O
10 2 8
C C C CCC B P P
C
10 4 6 PPPP RR RR RR
10 4 6 PPPP OOOO O O
10 6 4 PPPP P PR R R R
6 6 0 PPPPPP
10 2 8 R R R R P RP RRR
10 10 0
8 4 4 P P RRR R PP
10 0 10 R R RRRR R R RR
10 2 8
PP R
R RR RR RR
4 0 4 R RRR
10 10 0 PPPP PPP TTT
10 8 2 C
10 1 9 CC CC C CC C TC
10 4 6 PP T CC CC CC T
10 10 0
P P P
P044
10 10 0 TT T TTTT TTT
P00101 PP PP PTTTT
TEST PLUG
NUMBER
TP-109
TTT
T
TT
TP-109
TP-109
TP-111
TP-109
TTTTT066 T
PPPTT077 PP
TTTT044
TP-109
TP-109
TP-109
TP-111
TP-111
TP-109
TP-109
TP-111
TP-109
TP-109
TP-109
TP-112
TP-109
TP-112
TTPPPPP PPP
RRRRR808 RRR
TTTTT066 T
TC TTTTTTT
TPPPP TTTTT
101010
Configuration Selection Chart
FT & RT Test Switches
INDIVIDUAL
FT SWITCH
NUMBER
-151
-152
-153
-154
-155
-156
-157
-158
-159
-160
-161
-162
-163
-164
-165
-166
-167
-168
-169
-170
-171
-172
-173
-174
-175
-176
-177
-178
-179
-181
-182
-183
-184
-185
-186
-187
-188
-189
-190
SWITCH CONFIGURATION
POLES
TOTAL V A
10
10
2
10103
P=POTENTIAL C=CURRENT (NON-SHORTING)
A B C D E F G H I J
P
0
P CC CC CC P
8
7
*
C C
P
P T P P T P PT
CC CC CC
C-C=CURRENT (SHORTING)
*
10 4 6 P CC CC C PC PP
10 10 0 P T PPP PPPP T
10 10 0 P T PPP PPP T T
P T PPP P P T T T
01010
10 10 0 P T T P P PPP T T
10 10 0 P T T P P P P T T T
10 10 0 P T T P PPT T T T
10 10 0 P T T P P TTT T T
10 10 0 P T T P TTTT T T
10 10 0 P TTT T P T T T T
10 10 0 P TTT TTTT T T
10 10 0 P T P P T PPPP T
10 10 0 P TTT T PPPP P
8 0 8 R
R RR RR RR
8 4 4
10 8
C
2
PPP PPPP PC
R RR RR RR
10 10 0 Y Y YYYYY YYY
10 1 9 P
CC CC C CC CC
10 10 0 PPT T TTTT T T
5 1 4 C C P C C
10 6 4 C
10 4 6 TTTT C
C CC CC
10 10 0 P T PPP PPP T P
10 0 10 CC CC CCC CC C
10 0 10 CCCCCC CC CC
C6401 CC C
PPPPC C
10 10 0 BBBB BBBB T P
10 10 0 TTTT T T PPP P
10 10 0 TTTT P PPPP P
10 4 6
10 4 6
10 4 6
10 6 4 P
T
P
C C
C C T
P P P P
C CC CC
C CC
C
PPPC
C C T C C T
C C C
TEST PLUG
NUMBER
TP-111
TCPP
TP-111
TP-111
PRPRPRPR
TT8201 R
TP-111
TP-109
PPP00101 PT T TTTT
YO00101 YYYYO OOO
TP-109
TP-109
CC CT P PPT P
TP-109
TP-109
TP-109
TP-109
TTTT
TP-112
T
C
P = POTENTIAL- black handle
T = POTENTIAL- red handle
C = Current Non-shorting - black handle
R = Current Non-shorting - red handle
C-C = Current shorting - black handle
R-R = Current shorting - red handle
O = POTENTIAL- orange handle
Y = POTENTIAL- yellow handle
G = POTENTIAL- green handle
B = POTENTIAL- blue handle
CO = Current Non-shorting - orange handle
CY = Current Non-shorting - yellow handle
CG = Current Non-shorting - green handle
CB = Current Non-shorting - blue handle
CW = Current Non-shorting - White handle
CO-CO = Current shorting - orange handle
CY-CY = Current shorti
ng - yello
w handle
CG-CG = Current shorting - green handle
CB-CB = Current shorting - blue handle
CW-CW = Current shorting - white handle
W = POTENTIAL- white handle
* = SHORT CIRCUIT WITHOUT JAW OR BLADE AT POSITION "H"
= FT-079 and FT-085 *APPEAR SIMILAR EXCEPT THAT FT-079 IS SHORT CIRCUIT WITHOUT JAW OR BLADE AT POSITION "H"
Note: Selection Chart does not include all possible configurations
111111
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