The CT-4 is a robust clip-on high current transform er that extends the m easurement capability of the P6021, A6302/ XL, A6302, A6312 and TCP202 clip-on current probes. Maxim um low frequency perform ance down to 0.5 Hz is obtained using the AM 503S. Current am plitudes to 20,000 A may be measured using the A6302/ XL, P6021, A6302, A6312 or TCP202 (with passive termination), provided the am p* second ratings are not exceeded.
The CT-4 may be used with the P6021 for measurem ents at normal line frequency and above. (The P6022 and A6303 are not compatible with the CT-4.) The CT-4 has receptacles for current probes in either 20: 1 or 1000: 1 step-down ratios. The 1.5 in. square split-core opening makes it possible to
clip onto large conductors without breaking the circuit under test. Insulated core and shield assemblies allow m easurements on bare wires to 3000 V peak (1000 Vrms, CAT I I I ), and to 14 kV with the included high voltage bushing.