Specifications are subject to change without notice CTD-1X DS ENG 100311 1
• Cable and bus-bar type current transformer
• 0.5 class, currents from 50 to 300 A
• Removable DIN-rail mounting holder
•Removable panel fixing clips
• 2 cable/bus-bar isolated fixing screws
• Double screw terminals (up to 8-wire connections)
• Sealable terminal block covers
Product Description
Model
Primary current
Secondary current
Option
Ordering Key
Cable/Bus-bar type current
transformer with DIN-rail/bus-
bar and panel mounting
facility.
Rated primary currents from
50 A to 300 A.
Accessories
AC Current Transformer (max 23mm φcable)
Type CTD-1X
Type Selection
Rated secondary current 5Aor 1 A
Output Specifications
Input Specifications
Operating frequency 48 to 62 Hz
Max. system voltage 0.72 kV
Rated insulation level 3kV/1 min. @ 50 Hz
Insulation class E(max 75°C)
Short-time current rating
Ith Typical 100 In/1 s
Idyn 2.5 Ith
The short-time thermal
current Ith is anyway limited
by the cable/bus-bar size
Extended current rating 120%
Security factor (FS) ≤5(Class: 0.5, 1 and 3)
Standards According to EN60044-1
Housing ABS, self-extinguishing:
UL 94 V-0
Mounting DIN-rail bus-bar
and panel mounting
Standard accessories Two terminal block screws.
Two sealable terminal block
covers.
Two panel mounting
fixing clips.
One DIN rail adapter.
Optional accessories Extended fixing kit CTD-kit:
Six cable/bus-bar
fixing screws.
Six plastic caps for
cable/bus-bar fixing
screws.
General Specifications
CTD-1X 100 5A XXX
Primary current
From 50 to 300A
(Refer to Range Table)
Option
XXX: none
XTX: tropicalization
Secondary current
1A
5A
Two panel mounting
fixing clips.
Special features 1Asecondary current,
Tropicalization
Working temperature -25°C to +60°C (-13°F to
140°F) (R.H. < 90% non
condensing @ 40°C)
Storage temperature -30°C to +70°C (-22°F to
158°F) (R.H. < 90% non
condensing @ 40°C)
Approvals CE, cUrus and CSA
Connection Screw type
Cable cross section area From 1.5 to 6 mm2
Min/Max screws tightening
torque relevant to terminal
block screws:
From 1 to 2 Nm
Max screws tightening
torque relevant to the
cable/bus-bar fixing
screws: 0,3 Nm
Protection degree IP00
IP20 (with sealable terminal
block covers + wire termi
nals)
Cable diameter Max. 23 mm
Bus-bar size Max. 20x5 mm
Weight From 150 to 200 g
Optional fixing kit: CTD-kit
2Specifications aresubject to change without notice CTD-1X DS ENG 100311
Dimensions (mm)
Range Table
CTD-1X
Benefits
44
65,2
φ23,3
83,6
69,2
44
30
46
27
22
Model CTD-1X from 50A to 100A
Primary
Current Burden (VA)
A CL 0.5 CL 1 CL 3
50(@60°C/140°F) 11.25
60 (@60°C/140°F) 1 1.25
70 (@60°C/140°F) 1.5 1.75
75 (@60°C/140°F) 1 1.25 1.75
80 (@60°C/140°F) 1.25 1.5 2
100 (@60°C/140°F) 1.5 1.75 2.25
Model CTD-1X from 120A to 300A
Primary
Current Burden (VA)
A CL 0.5 CL 1 CL 3
120 (@60°C/140°F) 1.75 2 2.5
125 (@60°C/140°F) 2 2.25 2.75
150 (@60°C/140°F) 2.25 2.5 3
160 (@60°C/140°F) 2.5 2.75 3.25
200 (@60°C/140°F) 3 3.25 3.75
250 (@50°C/122°F) 4.5 4.75 5.25
300 (@50°C/122°F) 5 5.5 6
1 2 3 4 5
6 7 8 9 10
Wiring Diagram
•Easy and quick mounting either on a panel or
on a DIN-rail (see figure 1-2).
• Protection of screw terminals using specific
sealable covers to assurealways the best
safety (see figure 3).
•Bridging of current 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 screws provided with insulation caps to
grant a strong and reliable fixing of the
current transformer to the bus-bar (see figure10).
S1 S2
L
N
P1 P2
