Current transformer TO-400
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  • Current transformer TO-400
  • Current transformer TO-400
  • Current transformer TO-400

Current transformer TO-400

TO-400-5, 5908312590880

With open core. 400/5 transformer. 2,5 VA.
The current transformer is used for proportional change of high current strength to lower values, adapted to the measuring range of control and measuring devices.

Functioning
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).


     

 

TO-400-5
Type
single-phase
Building
with open core
Transmission lp / ls
400/5
Class
0,5
Power [VA]
2,5 VA
Frequency
50÷60 Hz
Maximum working voltage
0,66 kV AC
Standard number
IEC 60044-1
Nominal secondary current Is
5 A
Isolation breakdown voltage
3 kV/1 min.
Weight
0,9 kg
Security factor
FS ˂ 5
Connection S1 / S2
zaciski śrubowe 4 mm²
Dimensions: A; B; C; D; E; F; G; H; AND; [Mm]
50 mm; 80 mm; 78 mm; 114 mm; 145 mm; 32 mm; 32 mm; 32 mm; 33 mm;
Tightening torque
0,5 Nm
Working temperature
-15 ÷ 50°C
Mounting position
vertical/horizontal
Assembly
Front of control cabinet
Ingress Protection Marking
IP20
Type Transmission Class Power  
 Dimensions [mm] Weight
  Ip/Is   [VA] A B
C D E F G H I [kg]
TO-100 100/5 1,0 1,5 21 32 51 89 105 34 42 40 32 0,78
TO-150 150/5 1,0 3,0 21 32 51 89 105 34 42 40 32 0,78
TO-200 200/5 0,5 1,5 21 32 51 89 105 34 42 40 32 0,78
TO-250 250/5 0,5 1,5 21 32 51 89 105 34 42 40 32 0,78
TO-300 300/5 0,5 1,5 21 32 51 89 105 34 42 40 32 0,78
TO-400 400/5 0,5 2,5 21 32 51 89 105 34 42 40 32 0,78
TO-600 600/5 0,5 2,5 50 80 78 114 145 32 32 32 33 0,9
TO-750 750/5 0,5 5,0 50 80 78 114 145 32 32 32 33 0,9
TO-1000 1000/5 0,5 5,0 50 80 78 114 145 32 32 32 33 0,9

     

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