AC Current Transformer (max 64x20mmbus-bar)
• 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
CTD-4X 1250 5A XXX
Cable/Bus-bar type current transformer with DIN-rail/bus- bar and panel mounting facility.
Rated primary currents from
150 A to 1600 A.
Primary current Secondary current Option
Optional fixing kit: CTD-kit
From 150 to 1600A (Refer to Range Table)
Operating frequency45 to 65 Hz
Max. system voltage0.72 kV
Rated insulation level3 kV/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 Refer to Range Table
Security factor (FS)5 (Class: 0.5, 1 and 3)
Standards According to EN60044-1
HousingABS, self-extinguishing: UL 94 V-0
Standard accessoriesTwo terminal block screws.
Two cable/bus-bar fixing screws.
Two plastic caps for cable/bus-bar fixing screws. Two panel mounting fixing clips.
Two sealable terminal block covers.
Optional accessoriesExtended fixing kit: CTD-kit
Two panel mounting
Six cable/bus-bar fixing screws.
Six plastic caps for cable/bus-bar fixing screws
Special features1 A secondary current, Tropicalization
Working temperature-25°C to: refer to Range Table
(-13°F to: refer to Range Table) (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 areaFrom 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 terminals)
Cable diameter Max. 51 mm
HorizontalMax. 64x20, 51x43 mm
VerticalMax. 51x31 mm
WeightFrom 450 to 700 g
Rated secondary current5 A or 1 A
Specifications are subject to change without noticeCTD-4X DS ENG 250315 1