SEL-CTs are designed for applications where it is difficult or uneconomical to open the primary conductor to install a solid-core-type current transformer. The split-core design uses M-6 silicon steel formed into a hexagonal or rectangular shape. This allows the core to be opened to the nominal window diameter. SEL-CTs can be installed over bushings or over cables and are held in place with cable ties.
The SEL-CT is encapsulated in a flexible vinyl plastic with 600 V class insulation. The secondary terminals and hardware are nickel-plated brass.
Volume pricing is available.
In-Service Installation—Use SEL-CTs for electrical load surveys, industrial energy management systems, submetering for department costing, and in conjunction with demand, kilowatt-hour, or power factor meters; current or watt transducers; or current-sensing relays. The split-core design eliminates the need to open the primary cable during installation over existing bushings or cable for a lower installation cost and time compared to closed-core designs. Install SEL-CTs when secondary load is present. Flexible encapsulation provides 600 V class insulation and ensures a long product life. Four window diameters are available: 3.5", 4.5", 6.0", and 8.0".
|Primary Current||600 to 3,000 A|
|Secondary Current||5 A|
|Accuracy||±3% at rated burden|
|Metering Burden||B-0.2 (ANSI C57.13)|
|Nominal Window Diameters||3.5", 4.5", 6.0", and 8.0"|
|Core Design||Flexible split core|
|Core Material||Grain-oriented silicon steel|
|Insulation Class||600 V (can be used on higher voltage circuits when installed over insulated conductors)|
|Secondary Winding Material||Copper|
|Electrical Terminals||Nickel-plated brass threaded posts|
|Markings||Hot-stamped for polarity, catalog number, and ratio|
|Operating Temperature||–40° to +85°C|
|Installation Temperature||–10° to +85°C|