Current transformer TO-250

Reference: TO-250-5, EAN13: 5908312590866

Product description

With open core. 250/5 transformer. 1,5 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).

Type	single-phase
Building	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 number	IEC 60044-1
Nominal secondary current Is	5 A
Isolation breakdown voltage	3 kV/1 min.
Weight	0,78 kg
Security factor	FS ˂ 5
Connection S1 / S2	zaciski śrubowe 4 mm²
Dimensions: A; B; C; D; E; F; G; H; AND; [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
Assembly	Front of control cabinet
Ingress Protection Marking	IP20

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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