Measuring current transformers

Measuring current transformers, split-core type Product description The highly sensitive split-core-type WS... series measuring current transformers convert residual currents of 10 mA...100 A into evaluable RCM or EDS signals and can be retrofitted to existing electrical installations where disconnection must be prevented. The CTs are connected to the respective evaluator by two wires. Depending on the connecting lead used, the distance between the CT and the evaluator may be up to 40 m. Make sure that all live conductors are routed through the measuring current transformer and that these conductors...

Measuring circuit Rated transformation ratio Rated burden Rated primary current Nominal power Rated frequency Internal resistance Secondary overvoltage protection Accuracy class Rated continuous thermal current Rated short-time thermal current Rated dynamic current Technical data Highest system voltage for electrical equipment Um AC 720 V Rated impulse withstand voltage Uisol 3 kV with suppressor diode P6KE6V8CP 5 Shock resistance IEC 60068-2-27 (device in operation) 15 g/11 ms Ambient temperature storage temperature range -40.. .+70 °C

Installation instructions • Do not pass shielded cables through the measuring current transformer. • As a general principle, the PE conductor and low-resistance conductor loops must not be passed through the measuring current transformer! It is important that the leads are passed through the measuring current transformer in the right direction Never pass a PE conductor through the measuring current transformer The primary conductors may only be bent from the specified minimum distance. The minimum bending radius specified by the manufacturers must be observed. * Distance to 90° angle: 2x external...