2388-MANUL-V10.00.00-UTP2 Operating Manual
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1. General Description
The UltraTEV
®
Plus² (UTP2) is a versatile hand-held tool used to easily detect and classify Partial Discharge
(PD) in a wide range of electrical equipment.
The UTP2 uses inbuilt TEV and Ultrasonic sensors and external accessories to detect the presence of potentially
damaging PD in switchgear, cables and overhead line equipment.
The UTP2 brings together several complementary sensor modes in a single handheld instrument. By regularly
checking switchgear while it’s in service using the UTP2, failure risks can be identified and action taken to avoid
faults and downtime. Algorithms and analysis capability in-built to the UTP2 provide vital insight, classifying
what you find to support the decisions you make and deliver the outcomes you need. It’s never been simpler to
interpret what you’re seeing and choose a course of action.
The UTP2 records measurements at the touch of a button. Internal storage can be used to provide access to
historical data while you are out in the field. Capturing what you have measured allows you to see trends in the
performance of your network.
2. Non-Intrusive Detection of Partial Discharge Activity
What is Partial Discharge?
Partial discharges are electrical discharges that do not completely bridge the insulation between electrodes.
The magnitude of these discharges is usually small, however they cause progressive deterioration of insulation
that may eventually lead to failure.
Non-intrusive partial discharge detection provides a means for identifying these potential sources of insulation
failure. If not detected the discharge may result in failure causing not only in loss of supply to customers and
damage to plant but could also endanger staff.
How can Partial Discharge be detected?
A partial discharge emits energy in various ways and produces a number of effects which can be detected:
The most practical techniques for non-intrusive testing are based on the detection of the radio frequency part
of the electromagnetic spectrum and ultrasonic emissions. The UTP2 has specifically been developed to enable
electromagnetic and ultrasonic activity to be detected in a single simple to use instrument.
Airborne Ultrasonic Discharge Activity
Acoustic emissions from partial discharge activity occur over the whole acoustic spectrum. Audible detection
is possible but depends on the hearing ability of the individual. Using an instrument to detect the ultrasonic
part of the acoustic spectrum has several advantages; instruments are more sensitive than the human ear, are
not operator dependent and are more directional when operating above the audible frequency.
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