Select - Transformers

SERIES SCT, ENCLOSED MEASUREMENT CTSThe Current Transformers (Cts) are designed for ease of mounting and access, as well as to minimise space requirements. The standard frames, which include overlapping current ratios, permit selection for any cable or busbar system. Enclosed, Tape Wound and Resin Cast Measurement Cts and Tape Wound and Resin Cast Protection Cts for DIN Rail, Busbar and Bracket Mounting are offered but CTs beyond the range specified in this catalogue, also can be offered on request. MEASUREMENT CTSMeasurement CTs are required to transform the primary current, at various classes of accuracy, as specified by the class designation, over a current range from 5% to 120% of its rated primary current. The design of this type of CT requires the inclusion of a core and winding which will, when connected to its rated burden, perform within the limits of error as indicated by the standards specifications. It is an advantage for a measurement CT to saturate above this range, which provides a protection against damage to instrument by limiting the secondary current, when surge current or faults appear in the primary circuit.