TEST TERMINAL

FEATURES
Simplified calibration and testing procedures for PT and CT circuits assure safety with their structure
Our test terminals allow you to perform calibration and that prevents wrong insertion.
testing procedures with instrument and relays connected High insulation and anti-inflammability
in place, resulting in great labor saving. For the housing material, high-performance engineering
Broad range of applications plastics is used to provide high insulation,
Our test terminals are available in a broad range of types anti-inflammability, and impact resistance.
including the stud type and insertion type to meet your Special spec for tropical region
current capacity requirements ranging from 5 to 30A and To ensure high durability in harsh use under tropical
your applications. regions, special protective treatment is applied to some
Safety structure products, which are available in the same ratings,
Our test terminals for CT circuits are designed to prevent performance, and dimensions as those of the standard
the circuit open. Both of the insertion type test terminals products.

SPECIFICATIONS (RATINGS, PERFORMANCE)

Type B-TYPE K-TYPE A-TYPE

Specification

Rated insulation voltage (Ui) 250V 500V 250V

Rated current-carrying capacity (lth) 10A 10A 5A

Max. wire size 82 5.52 22

Withstand voltage 1 min. at 2,500V AC 1 min. at 2,000V AC

Lightning impulse 7kV 1.2 / 50 s 3kV 1.2 / 50 s

Operating temperature 5 to 40C

Insulation resistance Insulation-resistance meter (1,000V DC) 1,000 M Insulation-resistance meter (500V DC) 1,000 M

Overload capacity 1 sec. at 200 A AC

Operating current-carrying capacity as general termial use: 30 A

D1
 TEST TERMINAL

A TERMINAL
BLOCK
HOW TO ORDER
[B-type test terminal]

B-PTT B MR

B CONNECTOR
Basic type Code Spec
Code Munsell color (blank) Standard
Code Structure / use 4/1.5 7.5BG4/1.5 MR Moisture resistance
PTT Single-contactor Structure 3/3.5 7.5BG3/3.5
CTT Dual-contactor Structure R 7.5R4.5/14
C Cover (Clear) Y 2.5Y8/12
SV B N1.5

CENTER PARTS
SB Jumper
LB

CONTROL
[K-type test terminal]

K TT- A W 3-B M MR

C
Basic type
Code Spec
Test terminal Code Front cover (blank) Standard

D TEST TERMINAL
(blank) Removal type MR Moisture resistance
M Slide type

Code Munsell color

4/1.5 7.5BG4/1.5
Code Contactor structure B N1.5
Code Spec S Single contactor
(Only for voltage type)

A For current W Dual contactor Code Pole Code Pole

V For voltage 1 1 pole () 4 4 poles
2 2 poles 6 6 poles
3 3 poles 8 8 poles ()
[K-type test plug]

PILOT LAMP &

(): Only for current type

K TP- A 3 MR

INDICATOR
Basic type
Code Spec
(blank) Standard
MR Moisture resistance E

Code Pole Code Pole

Code Spec 1 1 pole () 4 4 poles
Code Structure at the contactors top A For current 2 2 poles 6 6 poles
TP Short contactor V For voltage 3 3 poles 8 8 poles ()
TQ Long contactor (): Only for current type
F SWITCH

[A-type test terminal or plug]

A TT- A 3
Basic type
Code Pole Code Pole
Code Spec 2 6
ELECTRONIC

2 poles 6 poles
Code Spec A For current
(Circuit opening prevention) 3 3 poles 8 8 poles
TT Test terminal V For voltage
4 4 poles
DEVICES

(Power source contact prevention)

TP Test plug VL For voltage

(Circuit opening prevention)

TQ Test plug
(screw-type)

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INSERTION TYPE
TEST TERMINALS

K-TYPE
STANDARD PRODUCTS (TERMINAL)

KTT-AW Pole No. - Color (For current)

Circuit opening prevention type Terminal cover (clear)
Terminal No.

CTT



A

Pin position
M

Applicable plugs
Pole 1 2 3 4 6 8 KTQ-A
A 44 62 80 98 134 170 KTP-A

KTT-VW Pole No. - Color (For voltage)

Terminal cover (clear)
Circuit opening prevention type
Terminal No.

VTT



A

Pin position
M

Applicable plugs
Pole 2 3 4 6
KTQ-V
A 62 80 98 134

KTT-VS Pole No. - Color (For voltage)

Terminal cover (clear)
Power-source contact prevention type
Terminal No.

VTT



A
Pin position
M

Applicable plugs
Pole 2 3 4 6
KTP-V
A 62 80 98 134

Combinations of test terminals and plugs, and applications Precautions on use

To insert a test plug, be sure to lock the relay.
Test terminal Test plug Application If another power source is used when a voltage
Combination of circuit disconnection circuit is tested, select the combination of KTT-VS
KTQ-A prevention types (Recommendation) and KTP-V to prevent any contact with the
KTT-AW test power source.
KTP-A Combination of circuit disconnection
prevention types (Recommendation) In order to prevent any contact with the test power
Combination of circuit disconnection source, be sure to turn OFF the power switch
KTT-VW KTQ-V prevention types (Recommendation) when inserting a plug.
For the purpose of preventing a momentary circuit
KTT-VS KTP-V Combination of power-source contact
prevention types (Recommendation) disconnection. Combination of KTT-AW and
KTQ-A are recommended for high contact
reliability.

D5
 TEST TERMINAL

A TERMINAL
BLOCK
SLIDE COVER MODELS (TERMINAL)

KTT-AW Pole No. - Color (For current)

Circuit open prevention type

B CONNECTOR
Terminal cover (clear) Terminal
t=1.6 to 6 No. NP
Slide cover up position
(70)

50

40

CTT
10
A 14 81
Plug mis-insertion
prevention pin Slide cover

CENTER PARTS
Terminal cover (clear)
M

Recommended plug type

CONTROL
Pole 1 2 3 4 6 8
KTQ-A
A 44 62 80 98 134 170 KTP-A

KTT-VW-M
Pole No. Color (For voltage)

C
Circuit open prevention type
Terminal cover (clear)

D TEST TERMINAL
Terminal
t=1.6 to 6 No. NP
Slide cover up position
(70)

40

50

VTT
10
A 14 81
Plug mis-insertion
prevention pin
Slide cover Terminal cover (clear) M

Pole No.
Pole 2 3 4 6 Recommended plug type

PILOT LAMP &

KTQ-V
A dimension
A 62 80 98 134

INDICATOR
KTT-VS-M
Pole No. Color (For voltage)

Power source contact prevention type

Terminal cover (clear)
Terminal
No. NP
E
t=1.6 to 6
Slide cover up position
(70)

40
50

VTT
10
A 14 81
F SWITCH

Plug mis-insertion
prevention pin
Slide cover Terminal cover (clear) M

Pole 2 3 4 6 Recommended plug type

KTP-V
A 62 80 98 134
ELECTRONIC
DEVICES

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INSERTION TYPE
TEST TERMINALS

K-TYPE
STANDARD PRODUCTS (PLUG)

KTP-A Pole No. (For current) Jumper NP

(when short bar is

121 (when short bar is mounted: 122.2)

mounted: 53.2)





L

Applicable terminal
KTT-AW

Pole 1 2 3 4 6 8

L 44 62 80 98 134 170
Short conductive portion on plug top

KTP-V Pole No.

(For voltage)
NP

(when short bar is

121 (when short bar is mounted: 122.2)

mounted: 53.2)

Jumper
L

Applicable terminal
KTT-VS
KTT-VW (Recommended)


Pole 2 3 4 6

Short conductive portion on plug top L 62 80 98 134

KTQ-A Pole No.

(For
current) Jumper NP
(when short bar is
118.5 (when short bar is mounted: 119.7)

mounted: 53.2)

Applicable terminal
KTT-AW


Pole 1 2 3 4 6 8

Long conductive portion on plug top L 44 62 80 98 134 170

KTQ-V Pole No. (For voltage)

NP
(when short bar is
118.5 (when short bar is mounted: 119.7)

mounted: 53.2)

Jumper
L

Applicable terminal
KTT-VS
KTT-VW (Recommended)


Pole 2 3 4 6

Long conductive portion on plug top L 62 80 98 134

D7
 TEST TERMINAL

A TERMINAL
BLOCK
JUMPERS SUPPLIED WITH TEST PLUGS

The quantities of jumpers supplied are shown as below:

Model KTP-A / KTQ-A KTP-V / KTQ-V

B CONNECTOR
Pole 1P 2P 3P 4P 6P 8P 2P 3P 4P 6P
Jumper
KT jumper A 2 3 4 6 8 2 3 4 6

KT jumper B 1 2 3 5 7

KT jumper A KT jumper B
(Vertical jumper) (Horizontal jumper)

CENTER PARTS
ACCESSORIES

CONTROL
Box set of plugs

C
D TEST TERMINAL
Box set for KTPB plugs Model Description Boset for KTQB plugs Model Description
KTP-A2 1 piece KTQ-A2 1 piece
KTPB-A2-V2 KTP-V2 1 piece KTQB-A2-V2 KTQ-V2 1 piece
Red, white wire 4 pieces each Red, white wire 4 pieces each
KTP-A3 1 piece KTQ-A3 1 piece
KTPB-A3-V3 KTP-V3 1 piece KTQB-A3-V3 KTQ-V3 1 piece
Red, white, blue wire 4 pieces each Red, white, blue wire 4 pieces each
KTP-A4 1 piece KTQ-A4 1 piece
KTPB-A4-V4 KTP-V4 1 piece KTQB-A4-V4 KTQ-V4 1 piece
Red, black, white, blue wire 4 pieces each Red, black, white, blue wire 4 pieces each

PILOT LAMP &

KTP-A6 1 piece KTQ-A6 1 piece
KTPB-A6 Red, white, blue wire 4 pieces each KTQB-A6 Red, white, blue wire 4 pieces each

INDICATOR
KTP-V6 1 piece KTQ-V6 1 piece
KTPB-V6 Red, white, blue wire 4 pieces each KTQB-V6 Red, white, blue wire 4 pieces each

KTP-A8 1 piece KTQ-A8 1 piece

KTPB-A8 Red, black, white, blue wire 4 pieces each KTQB-A8 Red, black, white, blue wire 4 pieces each

Jumpers are included. Jumpers are included.

Set of KTP and KTQ is also available. Set of KTP and KTQ is also available.
E

Jumper
KT jumper A KT jumper B
F SWITCH

Jumpers are supplied as standard equipment.

Nameplate for usage display [common to KTT and ATT]

.
ELECTRONIC

The material is single-side coated paper (white). (Ordering unit: 100 pieces)
DEVICES

Indicated character CT secondary PT secondary GPT secondary GPT third Blank

Code PT2RY VT2RY GPT2RY GPT3RY CT2RY

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INSERTION TYPE
TEST TERMINALS

K-TYPE
STRUCTURES AND EACH COMBINATION CHARACTERISTIC
Diagram of Main
Auxiliary contactor contactor Spring Upper terminal
Diagram of
Contactor Spring Upper terminal
contactor for current contactor for voltage
(KTT-AW) (KTT-VS)

Lower terminal Lower terminal

When a plug is inserted and the auxiliary contactor is opened, When the plug is inserted, the contactor is opened. This
the main contactor will not be opened. The auxiliary contactor state will be maintained until the contactor makes contact
closes before the plug releases the main contactor. with the contact point of the plug. This eliminates the
Either the auxiliary contactor or the main contactor always possibility of making contact with the power source.
make circuit with a plug, preventing the CT circuit opening.

Combination of KTT-AW and KTQ (Recommended) Combination of KTT-VS and KTP (Recommended)
The KTT-AW terminal has a dual-contactor structure The KTT-VS has a single-contactor structure consisting of a main contactor
consisting of main and auxiliary contactors. In addition, the only. The KTP has a long conductive part for contact up to 10 mm before its
KTQ plug has a long conductive part for contact up to its leading end (the leading 10 mm part is an insulator). When the plug is inserted,
leading end. Therefore, when the plug is inserted, the contact the contact (C) of the terminal is opened before the contact (B) is closed.
is completed at two contacts (A) and (B) before the contact Therefore, even if another power source is inserted from the plug when the
(C) of the terminal is opened. Thus, this combination provides plug is inserted or removed, there will be no possibility of making contact with
excellent function for preventing the circuit from being the power source. However, when the circuit voltage is measured with a test
opened. instrument, the relay will malfunction due to the momentary disconnection of
the circuit. For this reason, the relay must be locked.
To instrument or
power source for test To transformer
or instrument
To instrument or To transformer
power source for test or instrument
A B C
B C

Combination of KTT-AW and KTP Combination of KTT-VS and KTQ (special combination)
The KTT-AW has a dual-contactor structure consisting of The KTT-VS has a single-contactor structure consisting of a main contactor
main and auxiliary contactors. The KTP plug has a shorter only. However, the KTQ has a long conductive part for contact up to its leading
conductive part for contact than the KTQ. However, when it is end. Therefore when the plug is inserted, the contact (B) of the terminal is
inserted, the contact (A) of the terminal is closed before the closed before the contact (C) is opened.
contact (C) is opened (the contact (B) starts being closed This ensures that the circuit never be opened when the plug is inserted or
after the contact (C) has been opened). removed. Therefore, when the circuit voltage is measured using a test
instrument, the relay will not malfunction due to the momentary disconnection
of the circuit. However, if you try to insert another power source from the plug,
a temporary connection with the power source will occur.
To transformer
To instrument or or instrument
power source for test
To transformer
To instrument or or instrument
A B C power source for test

B C

PANEL CUTOUT DIMENSIONS

Size 1P 2P 3P 4P 6P 8P
A 36 54 72 90 126 162
A5 A
B 44 62 80 98 134 170

(Min. mounting pitch)

D9
 TEST TERMINAL

A TERMINAL
BLOCK
DIRECTIONS FOR MOUNTING
Mounting procedure

Mount the test terminal Tighten the mounting

B CONNECTOR
Mounting screw
from the front of the screws by turning them
panel (remove the clockwise with a Philips
terminal cover). screwdriver.

Terminal
cover

Stopper

CENTER PARTS
(Take care so that the stoppers do not hit against any panel edge.)

CONTROL
OPERATING INSTRUCTIONS
Measuring current and voltage

C
Voltage KT jumper A Current KT jumper A

D TEST TERMINAL
1 5 3
3 1 5

2 6 4
6
4 2

1. Short-circuit each phase (each set of the upper and lower 1. Connect an ammeter circuit between the poles to be

PILOT LAMP &

terminals represents the same phase) with the KT jumper measured.
A. 2. Short-circuit the other phases with the KT Jumper A.

INDICATOR
2. Connect a voltmeter circuit between the phases to be 3. After the connection, insert the plug.
measured. Note: Opening the CT circuit creates a dangerous situation.
3. After the connection, insert the plug into the terminal. Be sure to avoid inserting the plug without ensuring the
Note: Be sure not to insert the plug with wrong phases proper connection.
short-circuited because it is dangerous to short-circuit Be sure to aroid inserting the plug with wrong
PT secondary circuit. The KT jumper B (for connection because it is dangerous to open CT circuit.
short-circuiting different phases) does not come with
the KTP-V and KTQ-V.
E

Fuse Fuse
4 3

6 5

Meter or relay
F SWITCH

Meter or relay
Connection diagram

Connection diagram

When inserting the plug, take care not to touch with the
short bar or other.
ELECTRONIC
DEVICES

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INSERTION TYPE
TEST TERMINALS

K-TYPE
Calibrating a meter and testing a relay with the test power source
For voltage meter For current meter
KTP-V3H
KTT-VS3
KTT-AW3
KTP-A 3 H
Fuse Fuse

C.T

Meter and relay Meter and relay

Power switch Power switch
for test for test
Note: Note:
Be sure to mount the Be sure to mount the
power switch for test power switch for test
in the OFF state. in the OFF state.
Power source for test Power source for test

1. Connect the power source for test to the upper terminal

1. Connect the power source for test to the upper terminal screw screw on the plug for current.
on the plug for voltage. 2. Connect the KT jumper B to the lower terminal to prevent
2. Connect nothing to the lower terminals to keep it open. the CT circuit from being opened.
3. After the connection, insert the plug into the test terminal and 3. After the connection, insert the plug into the test terminal
then carry out calibration and others. and then carry out calibration and others.

KT jumper B

Note: Before connecting the power source for test, carefully check that it is connected to the correct terminals (not the vertically
reverse ones). To inset the plug, be sure to turn OFF the power switch.

Checking for electrical discontinuity or breakdown in internal wiring of board

Secondary side of current transformer
Lead-in terminal Instrument and relay
bracket Block A
1. Connect an insulation-resistance meter between the test
plugs TP(1) and TP(2).
2. Insert the connected plug into the test terminal TT(1) and
TT(2), and then measure the block A.
3. Similarly, measure the block B to the final block.
Lead-in terminal bracket 4. Insulation resistance for each block can be measured.
Block B

Final block
Note: Before inserting the plugs, short-circuit all the terminals
on the entire primary side of the current transformer
with the KT jumper B.

D11
 TEST TERMINAL

A TERMINAL
BLOCK
WIRING INSTRUCTION

Terminal: KTT-AW
Plug: KTP-A / KTQ-A

B CONNECTOR
CT 1 unit Secondary output measurement CT 1 unit Current calibration
Circuit Connecting position Circuit Connecting position

Jumper A


Terminal Plug 4 Terminal Plug Power SW 4
2
2

CENTER PARTS


3
3

1

CONTROL
1 Outside
power supply

Jumper B

C
CT 2 units Secondary output measurement CT 2 units Current calibration

D TEST TERMINAL
Circuit Connecting position Circuit Connecting position

Terminal Plug 4 Terminal Plug Power SW
4
2 6
2 6

3
3

1 5
1 5

Outside
power supply

PILOT LAMP &

2CT 2CT
Jumper B

CT 3 units Secondary output measurement CT 3 units Current calibration INDICATOR

E
Circuit Connecting position Circuit Connecting position

Jumper A

SW SW Power SW
Terminal Plug Terminal Plug
4 8 4 8

F SWITCH

2 6 2 6



3 7

3 7

1 5 1 5




Outside
power supply Jumper B
3CT 3CT
ELECTRONIC
DEVICES

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