Carlo Gavazzi CTD-4X Catalog Page

Accessories
AC Current Transformer (max 64x20 mm bus-bar)
Type CTD-4X

• Bus-bar type current transformer

• 0.5 class, currents from 150 to 1600 A

• Removable panel fixing clips
Up to 6 Bus-bar isolated fixing screws

•

• Double screw terminals (up to 8-wire connections)

• Sealable terminal block covers

Product Description

Cable/Bus-bar type current
transformer with DIN-rail/bus­bar and panel mounting
facility.

Rated primary currents from
150 A to 1600 A.

Type Selection

Primary current

From 150 to 1600A
(Refer to Range Table)

Secondary current

1A
5A

Input Specifications

Operating frequency 45 to 65 Hz
Max. system voltage 0.72 kV
Rated insulation level 3 kV/1 min. @ 50 Hz
Insulation class E (max 75°C)
Short-time current rating

I

th

I

dyn

Extended curr
Security factor (FS) ≤ 5 (Class: 0.5, 1 and 3)

ent rating

Typical 100 In/1 s

2.5 I

th

The short-time thermal
current I
by the cable/bus-bar size

Refer to Range T

is anyway limited

th

able

General Specifications

ds

Standar
Housing ABS, self-extinguishing:

Mounting Panel mounting
Standard accessories Two terminal block screws.

Optional accessories Extended fixing kit: CTD-kit

ding to EN60044-1

Accor

UL 94 V-0

Two cable/bus-bar
fixing screws.

wo plastic caps for

T
cable/bus-bar fixing screws.

wo panel mounting fixing

T
clips.
Two sealable terminal block
covers.

wo panel mounting

T
fixing clips.
Six cable/bus-bar fixing

ews.

scr

Ordering Key

Model
Primary current
Secondary current
Option

Optional fixing kit:

Option

XXX: none
XTX: tropicalization
2XX: class 0.2S (depending

on the primary current)

Special features 1 A secondary current,

Working temperature -25°C to: refer to Range Table

Storage temperature -30°C to +70°C (-22°F to

Approvals CE, cURus and CSA
Connection Screw type

Cable cross section area From 1.5 to 6 mm

Protection degree IP00

Cable diameter Max. 51 mm
Bus-bar size

Horizontal

ertical

V

Weight From 450 to 700 g

CTD-4X 1250 5A XXX

CTD-kit

Six plastic caps for
cable/bus-bar fixing screws

Class 0.2S
Tropicalization

efer to Range

r

F to:

°

(-13
Table) (R.H. < 90% non
condensing @ 40°C)

158°F) (R.H. < 90% non
condensing @ 40°C)

2

Min/Max screws tightening
torque relevant to terminal block
screws: From 1 to 2 Nm

ews tightening tor

Max scr
relevant to the cable/bus-bar
fixing screws: 0,3 Nm

IP20 (with sealable terminal
block covers + wir

Max. 64x20, 51x43 mm
Max. 51x31 mm

que

e terminals)

Output Specifications

Rated secondary curr

ent

5 A or 1 A

Specifications are subject to change without notice CTD-4X DS ENG 150311 1

CTD-4X

131,5

113

81,2

42

63

30

31

51

64

90

49,9

45

φ 51

20,5

43,5

51

Range Table

Model CTD-4X from 150A to 700A

Primary
Current

Temperature

Extended

current rating

Burden (VA)

A CL 0.5 CL 1

150 (@60°C/140°F) 120% 2.5 (5)

200 (@60°C/140°F) 120% 3.25 (6)

250 (@60°C/140°F) 120% 2.5 4.5 2

30 (@60°C/140°F) 120% 3 4 3

400 (@60°C/140°F) 120% 6 9 3

500 (@60°C/140°F) 120% 10 12.5 4

600 (@60°C/140°F) 120% 11 13.5 4

700 (@60°C/140°F) 120% 12.5 15 5

Benefits

1 2 3

(CL 3)

5P5

Model CTD-4X from 750A to 1600A

Primary
Current

A

Temperature

Extended

current rating

Burden (VA)

CL

0.5CL1CL5P5

750 (@50°C/122°F) 120% 13 15.5 5

800 (@50°C/122°F) 120% 14 16.5 5

1000 (@50°C/122°F) 120% 17.5 20 6

1200 (@50°C/122°F)

1250 (@50°C/122°F)

1500 (@50°C/122°F)

1600 (@50°C/122°F)

100% (+)

100% (+)

100% (*)

100% (*)

20 22.5 6

20 22.5 6

27.5 30 8

27.5 30 8

(*) A max overload of 120% for 1 min. every 30 min. is allowed.
(+) A continuous overload of 120% of the range is allowed @ amb.

temp. 40°C max.

4

5

6 7 8 9

• Easy and quick mounting on a panel (see
e 1).

figur

Dimensions (mm)

• Protection of screw terminals using specific

sealable covers to assure always the best
safety (see figure 3).
Bridging of curr

•

ent transformer output
without changing the connection of the
secondary, so to avoid any output
overvoltage during either the maintenance or
the installation procedure (see figure 4).

• Easy output and earth connection (see fig. 5).

• Screw terminals compatible with any kind of
wire terminals (see figure 6-7-8-9).
Multiple scr

•

ews to grant a strong and reliable fixing of the

scr

ews provided with isolation cap

current transformer to the bus-bar (see figure 10).

Wiring Diagram

S1 S2

L

P1 P2

N

2 Specifications ar

e subject to change without notice CTD-4X DS ENG 150311