Littelfuse Current Transformers 12

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Part	Manufacturer	Transformer Type	Mounting Feature	Approvals (V)	Type (Primary)	Window Dimension	Accuracy Class	Current Rating Ip:Is (A)	Nominal Operating Frequency	Height	Width	Length
CT200	Littelfuse	CURRENT SENSE TRANSFORMER	CHASSIS MOUNT	CSA	BAR PRIMARY	D57 m	2		50/60 HZ	108 mm	44.5 mm	98.3 mm
SE-CS10-4	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D108 m	0.02	12.5:0.0625	50/400 HZ	169.9 mm	32.5 mm	169.9 mm
SE-CS30-4	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D95 m	0.01	30:0.05	50/400 HZ	175 mm	33.5 mm	158 mm
SE-CS10-6	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D160.3 m	0.02	12.5:0.0625	50/400 HZ	215.9 mm	31.8 mm	215.9 mm
SE-CS10-2.5	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D63.5 m	0.02	12.5:0.0625	50/400 HZ	124 mm	27.9 mm	124 mm
SE-CS30-26	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D26 m	0.01	30:0.05	50/400 HZ	72 mm	26.5 mm	68 mm
CT200L	Littelfuse	CURRENT SENSE TRANSFORMER	CHASSIS MOUNT	CSA	BAR PRIMARY	D89 m	2		50/60 HZ	144.5 mm	44.5 mm	139.7 mm
SE-CS30-8	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D200 m	0.01	30:0.05	50/400 HZ	309 mm	33.5 mm	290 mm
SE-CS40-6	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D160.3m	0.02	50:0.0625	50/400 HZ	215.9 mm	31.8 mm	215.9 mm
SE-CS30-70	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D70 m	0.01	30:0.05	50/400 HZ	138 mm	30 mm	121 mm
SE-CS30-5	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D130 m	0.01	30:0.05	50/400 HZ	218 mm	33.5 mm	203 mm
SE-CS10-8	Littelfuse	CURRENT TRANSFORMER	CHASSIS MOUNT	CSA; UL	BAR PRIMARY	D209.5 m	0.02	12.5:0.0625	50/400 HZ	266.7 mm	38.9 mm	266.7 mm

Current Transformers

Current Transformers (CTs) are electrical devices that are used to measure electrical current in power transmission systems. They are also known as instrument transformers, because they transform the high currents found in power lines into lower currents that can be safely measured by instruments.

The basic principle of a CT is to use the magnetic field generated by the current flowing through a conductor to induce a current in a secondary winding, which is connected to a measuring instrument or a protective relay. The current in the secondary winding is proportional to the primary current, and is typically a lower value, such as 1A or 5A, which is easier to measure.

CTs are typically used in high voltage and high power systems, such as power plants, substations, and industrial facilities, to measure the current flowing through transmission lines, generators, motors, and other equipment. They are also used for protection purposes, such as detecting overcurrents and faults in the system, and triggering circuit breakers to isolate faulty equipment.

CTs come in various shapes and sizes, and are designed for specific current ratings and frequency ranges. They are typically installed around the conductor that carries the current, and connected to the measuring or protective device through insulated leads. Proper installation and maintenance of CTs are critical to ensure accurate and reliable measurements and protection of the system.