0.66kv Copper Current Transformer (CT) Mutual Inductor Current Sensor OEM ODM

Product Description

The current transformer, commonly referred to as a CT, serves the essential function of converting a larger primary current value into a smaller secondary current value through a specific ratio. CT is utilized for various applications, including protection and measurement. For instance, a current transformer with a ratio of 400/5 is capable of transforming a primary current of 400A into a secondary current of 5A.
A current transformer consists of a closed core and winding. The primary winding has a limited number of turns and is connected in line with the current to be measured, allowing it to carry the entire current flowing through the line. Conversely, the secondary winding comprises a greater number of turns and is connected in series with measurement instrumentation and protection circuits. During operation, the secondary circuit remains closed, resulting in a very low impedance in the series coil of the measurement and protection circuits. Consequently, the operational condition of the current transformer is akin to that of a short circuit.
In the context of power generation, substations, transmission, distribution, and electricity utilization, the current levels can range from a few amps to tens of thousands of amps. To facilitate measurement, protection, and control, it is necessary to convert these currents into more manageable values. Additionally, direct measurement of high line voltages poses significant safety risks. Current transformers thus play a critical role in current conversion and electrical isolation.

Model	Rated current primary/secondary	A	B	C	D	E	F	G	H
LD-BH-30I	30/5A-300/5A	60	36	67	17	60	31	10	59
LD-BH-40I	150/5A-800/5A	75	43	82	17	60	31	10	71
LD-BH-60I	400/5A-1200/5A	101	44	111	17	60	31	10	71
LD-BH-80I	600/5A-1000/5A	125	40	102	17	60	32	11	72
LD-BH-100I	800/5A-3000/5A	145	45	139	17	60	31	10	72
LD-BH-120I	1500/5A-5500/5A	196	46	210	17	60	34	11	72

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