Current transformer with open core 250/5 1.5VA TO-250-5 F&F
- Current transformer with open core 250/5 1.5VA TO-250-5 F&F
Current transformer with open core 250/5 1,5VA TO-250-5 F&F
Product description
With an open core, 250/5 current transformer. 1.5 VA power.
The current transformer is used for proportional change of large current intensities to lower values, adapted to the measuring ranges of control and measuring devices.
Operation
The wire with the measured current passes through the main hole of the transformer(P1/P2), which is equivalent to one winding of the primary winding. The terminals of the secondary winding S1 and S2 are connected to the terminals of the measuring circuit of the control or measuring device.
The ratio of the intensities of the currents in the two windings is a constant quantity and is called the current ratio: IPn/ISn=N, where IPn - rated primary current; ISn - rated secondary current; N - value of transmission ratio. From the value of the current flowing through the secondary winding, the value of the current flowing through the primary winding can be determined: ISm*N=IPm, where ISm - measured primary current; IPm - measured secondary current.
Note!
Recommended to connect the secondary system with a wire with a diameter of not less than 2.5 mm².
Recommended grounding of the S2 terminal.
Prohibit disconnection of the secondary circuit during operation of the transformer (possibility of high voltage resulting in paralysis of persons or damage to the device).
| Type | single-phase |
| Construction | with open core |
| Transmission lp/ls | 250/5 |
| Class | 0,5 |
| Power [VA] | 1.5 VA |
| Frequency | 50÷60 Hz |
| Maximum working voltage | 0,66 kV AC |
| Standard no | IEC 60044-1 |
| Nominal secondary current Is | 5 A |
| Insulation breakdown voltage | 3 kV/1 min. |
| Weight | 0.78 kg |
| Safety factor | FS ? 5 |
| Connection S1/S2 | 4 mm² screw terminals |
| Dimensions: A; B; C; D; E; F; G; H; I; [mm] | 21 mm; 32 mm; 51 mm; 89 mm; 105 mm; 34 mm; 42 mm; 40 mm; 32 mm; |
| Tightening torque | 0,5 Nm |
| Working temperature | -15 ÷ 50°C |
| Mounting position | vertical/horizontal |
| Mounting | board |
| Degree of protection | IP20 |