Current transformer TP-400

Current transformer TP-400

TP-300-5, 5902431671932

Product description

Three-phase. 400/5 transformer. 3,75 VA.
The 3-phase current transformer (3 in 1) is used for indirect measurements of three-phase currents. Its design allows for mounting directly on the outputs of the power disconnectors (ABB series Isomax, Merlin Gerlin series NS and analogous) saving installation time and place in the switchgear.

The cable with the measured current passes through the main opening of the transformer (P1 / P2), which is equivalent to one coil of the primary winding. The S1 and S2 terminals of the secondary windings are connected to the terminals of the measuring circuit of the control or measuring device.
The ratio of the strength of the currents in both windings is a constant value and is called the current ratio: IPn/ISn=N, where the IPn is rated primary current; ISn - rated secondary current; N - the value of the transmission. The value of the current flowing through the primary winding can be determined from the value of the current flowing through the secondary winding: ISm*N=IPm, wherein ISm - measured primary current; IPm - measured secondary current.

Please note!
It is recommended to connect the secondary circuit by a wire with diameter of not less than 2.5 mm².
It is recommended to ground the S2 terminal.
It is prohibited to disconnect the secondary circuit during operation of the transformer (the high voltage that may appear pose a risk of electric shock to the people or damage to the device).



Buildingwith close core
Transmission lp / ls300/5
Power [VA]2,5 VA
Frequency50÷60 Hz
Maximum working voltage720 V AC
Standard numberIEC 60044-1
Nominal secondary current Is5 A
Isolation breakdown voltage3 kV/1 min.
Opening dimensions P1 / P231 mm x 31 mm
Weight0,570 kg
Security factorFS ˂ 5
Connection S1 / S2zaciski śrubowe 4 mm²
Dimensions WxHxD [mm]142 mm x 55 mm x 96 mm
Short-circuit current (lth)60 x In
Dynamic short-circuit current (Idyn)2,55 x lth
Tightening torque0,5 Nm
Working temperature-5÷40°C
Mounting positionvertical/horizontal
AssemblyDIN rail / board / wire
Ingress Protection MarkingIP20
typeIp/IsClass power  
hole dimensions P1/P2
W×H×D [mm]
TP-100 100/5 11,515×2176,5×74×80
TP-300300/5 12,531×31142×55×960,570
TP-600600/5 12,531×31142×55×960,570