The Model 2620 Leakage Current Probe measures leakage current shunted to ground caused by insulation faults. It enables operators to locate existing failures, or anticipate potential faults before they occur, without shutting down equipment or spending hours on troubleshooting.

It is designed specifically for locating low current faults on high current loads. The detector is a sensitive AC current transformer capable of measuring differential or leakage current as low as 500μA, and can be used to measure continuous current up to 400A. The Model 2620 provides two output ranges: 1mV/mAac or 1mV/Aac. The output leads are terminated with standard 4mm banana plugs, compatible with any standard multimeter. Use of a digital multimeter with an analog bargraph is recommended: digital readout for accurate measurements, and analog bargraph for trend tracking.

The Model 2620 measures leakage currents on single or multi-phase systems. Measured currents may be in or out of phase, balanced or unbalanced. When clamping around all conductors, the net magnetic field at any instant will be zero if all enclosed conductors are supplying the full current to and from the load. If any current is diverted through an alternate path (such as insulation breakdown to ground), the net current loss will be detected, producing an output proportional to the amplitude of the fault current.

The Model 2620 may also be used as a highly accurate clamp-on current probe. With its 4" jaw opening and 500μA to 200A measurement range, it delivers a versatile solution for analyzing unbalanced current measurements, leakage values on grounding conductors, and ground loop currents.

Applications include:

• Preventive maintenance
• Equipment troubleshooting on electrical distribution systems
• High accuracy low-current measurements
• Fault current measurement on three-phase, three-wire systems

Features

• High sensitivity measurement performance
• Detects differential or leakage current as low as 500μA
• Measures current up to 400A continuous
• Two switch-selectable measurement ranges: 4A AC / 400A AC
• Large inside jaw diameter (>4")
• Operating temperature: -14 to 131°F (-10 to 55°C)
• Compatible with single, dual, and three-phase networks
• Direct connection to DMMs on mV or VAC range