ASK plug-in current transformer for indirect measurement of sinusoidal alternating currents. CURRENT TRANSFORMER ASK31.3,150/5A,2.5VA,CL.1. Primary nominal currents from 75 A to 1500 A Secondary nominal current of 1 A or 5 A. Class accuracy: 1. The ASK plug-in current transformers transform high alternating currents - up to 1500 A (primary current) - into small, harmless, measurable currents (secondary current). Secondary currents are standardized and are either 1 or 5 A. At the same time, they galvanically isolate the primary circuit and the secondary circuit from one another. The plug-in current transformer is plugged onto the primary conductor. This saves time-consuming wiring work. The secondary side (usually a measuring device, a display or a control system) is connected with terminals. Plug-in current transformers are available from 75 A with various hole sizes for busbars or cables. Thermal rated continuous current Icth: 100% IN Thermal rated short-time current Ith: 60 x IN, 1 sec. Max. Operating voltage Um: 0.72 kVIsolation test voltage: 3 kV Ueff, 50 Hz, 1 min.Nominal frequency: fN: 50 HzInsulation class: E (120°C)ASK 31.3 plug-in current transformer primary conductor 30 x 10 mm, 25.4 x 13 mm, 2 x 20 x 10 mmRound conductor 26 mm ØDimensions W x H x D: 61 x 75.5 x 48 mmASK 63.4 plug-in current transformer primary conductor 60 x 30 mm, 50 x 40 mmRound conductor 44 mm ØDimensions W x H x D: 96 x 105.5 x 58 mmASK 412.4 plug-in current transformer primary conductor 40 x 12 mm, 30 x 15 mmRound conductor 30.5 mm ØDimensions W x H x D: 71 x 85.5 x 58 mm. Current transformer ASK