LCWB5-66 KV Series Current Transformer manufacturers

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LCWB5-66 KV Series Current Transformer

Our LCWB5-66 current transformers feature fully-sealed porcelain-housed, oil-impregnated paper insulation for reliable measurement and protection in 66kV systems.

• Current ratios from 2×25/5 to 2×1000/5 with dual-ratio capability via terminal connections.

• Three or four secondary windings with accuracy classes 5P, 10P, 0.5, 0.2, and 0.2S.

• Short-time thermal current up to 50kA; dynamic current up to 125kA.

• Fast delivery, reliable quality, and extensive project experience backed by our company.

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Product Overview

This model of transformer is suitable for use in 50Hz, 66kV power systems for current measurement, energy metering, and relay protection applications. The product features a fully-sealed, porcelain-housed, oil-impregnated paper insulation chain-type structure. It is equipped with three or four secondary windings. The primary winding is constructed in two sections, allowing for two different current ratios by employing different connection methods at the terminals on the oil conservator. The active part is housed within this tank and secured to the base. The secondary leads are brought out through small porcelain bushings. The oil conservator is fitted with a metal expansion device (expander).

This product is suitable for installation at altitudes up to 1000m and in ambient temperatures ranging from -30°C to +40°C.

Technical Specifications

Rated Voltage (KV)	Rated Current Ratio (A)	Winding Configuration	Accuracy Class	Rated Output (VA)		Accuracy Limit Factor	Polarity	Rated Short-Time Thermal Current (kA)	Rated Dynamic Current (kA)	Rated Insulation Level (kV)	Creepage Distance	Oil Weight (kg)	Total Weight (kg)
				Number of Turns	Tapping, Class 0.5
66	2×25~ 2×750/5	P/P/0.5 P/P/0.2 P/P/0.5/0.2S P/P/0.5	5P	50		15	Subtractive	2.7~50	6.8~125	72.5 / 140 / 325	1.8	100	440
			10P
			0.5
			0.2
			0.2S	40
	2×750/5 Measuring Winding Tapping 2×400/5	P/P/0.2 P/P/0.5/0.2S P/P/0.5 P/P/0.2S	5P	50		15		25~50	6.8～125
			10P
			0.5		30
			0.2		30
			0.2S	40	30
	2×600/5 Measuring Winding Tapping 2×300/5	P/P/0.5/0.2S P/P/0.5 P/P/0.2S P/P/0.5/0.2S	5P	50		15		25~50	6.8～125		2.5
			10P
			0.5		30
			0.2		30
			0.2S	40	30
	2×1000/5 Measuring Winding Tapping 2×500/5	P/P/0.5/0.2S P/P/0.5 P/P/0.2S P/P/0.5/0.2S	5P	50		15		25~50	6.8～125
			10P
			0.5		30
			0.2		30
			0.2S	40	30

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