IEC Current Transformers 11

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Part	RoHS	Manufacturer	Transformer Type	Mounting Feature	Manufacturer Series	Approvals (V)	Type (Primary)	Window Dimension	Isolation Voltage	Packing Method	Accuracy Class	Current Rating Ip:Is (A)	Dimensions	Maximum Operating Temperature	Minimum Operating Temperature	Nominal Operating Frequency	Height	Width	Diameter	Nominal Input Voltage (V)	Maximum Secondary Burden	Minimum Operating Frequency	Length	Maximum Operating Frequency
1SVR450116R1200		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		100:1					78.5 mm	48 mm			2.5 VA		61 mm
1SVR450117R1300		Abb	CURRENT SENSE TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		500:1					78.5 mm	48 mm			5 VA		61 mm
1SVR450117R5100		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		300:5					78.5 mm	48 mm			5 VA		61 mm
1SVR450117R1100		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX	1	300:1					78.5 mm	48 mm			5 VA		61 mm
1SVR450116R5400		Abb	CURRENT TRANSFORMER	STUD MOUNT		IEC	BAR PRIMARY			BOX		200:5					78.5 mm	48 mm			5 VA		61 mm
1SVR450117R1400		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		600:1					78.5 mm	48 mm			5 VA		61 mm
1SVR450116R5200		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		100:5					78.5 mm	48 mm			2.5 VA		61 mm
1SVR450116R1100		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX	1	75:1					78.5 mm	48 mm			1.5 VA		61 mm
1SVR450117R5400		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX	1	600:5					78.5 mm	48 mm			5 VA		61 mm
1SVR450116R5300		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX		150:5					78.5 mm	48 mm			2.5 VA		61 mm
1SVR450116R1400		Abb	CURRENT TRANSFORMER	CHASSIS MOUNT		IEC	BAR PRIMARY			BOX	1	200:1					78.5 mm	48 mm			2.5 VA		61 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.