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AC Leakage Current Probe
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Model 2620
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The
Model 2620 measures leakage current shunted to ground caused by insulation
faults.
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It
enables the operator to locate failures when they occur, or anticipate them
before they
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occur, without shutting down equipment or spending
hours troubleshooting.
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It is designed specifically for locating low current faults on
high current loads. The detector
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is a sensitive AC current transformer capable of measuring
differential or leakage current
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as low as
500µA, and may be used to measure current up to 400A continuous.
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The
Model 2620 provides two output ranges: 1mV/mAAC or 1mV/AAC.
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The output leads are terminated with standard 4mm banana plugs
capable of interfacing
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with any
standard multimeter. The use of a digital multimeter with analog bargraph
is
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recommended; Digital
to provide accurate readings, and an analog bargraph
to track trends.
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The
Model 262 measures leakage currents on single or multi-phase systems. Currents
measured
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may be in or out of phase, balanced or unbalanced.
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Principle: when clamping around all conductors, the net
magnetic field at any instant in time
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will be zero if all the conductors surrounded by the leakage
current detector are supplying all
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the current
delivered to and received from the load. If any current is diverted through
any
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alternate path, such as an insulation breakdown to ground, the
net loss will be detected
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producing an
output proportional to the amplitude of the fault current.
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The
Model 2620 may also be used as a highly accurate clamp-on current probe. With
its 4
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jaw
opening and range of 500µA to 200A, the Model 2620 provides a versatile way
to analyze
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unbalanced
current measurements, leakage values on grounding conductors and ground
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loop currents.
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Features
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Very high sensitivity
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Differential or leakage current from 500µA
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Current up to 400A
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Two switch-selectable measurement ranges: 4AAC/400AAC
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Large inside jaw diameter (>4) allows use on large or
multiple conductors
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Work with single-, dual- and three-phase networks
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Connect directly to DMMs on mV or
VAC range
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Applications
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Preventive maintenance
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Equipment troubleshooting on electrical distribution
systems
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High accuracy low-current measurements
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Measure fault currents on three-phase, three-wire systems
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