UT255A/UT255B High Voltage Clamp Ammeters Operating Manual

PublishTime：2021-08-26

High voltage clamp ammeter stands out from traditional concept and is especially designed for on-line measurement on current, leakage current of high-voltage lines and determining working status of zinc oxide arrester. It is supported by latest CT and screening technologies and made up of exclusively high-voltage tester and high-voltage insulation rods. UT255B, in particular can offer wireless data transmission function and be equipped with wireless receiver that allows it to straightly receive data within 20 meters. The meter is also used as kinds of low-voltage leakage current clamp tester and amperemeter that are capable of accuracy up to 0.01mA .You had better to use wireless transmission model when focusing on measuring extremely small flow of leakage current or current and at the same time offered with timely data display.The design to integrate both clamp jaw and guide zone ensures this kind of meter to enjoy high accuracy, reliability and stability all the year around, and it is offered with insulation rods with outstanding features such as moisture proof, high temperature resistance, anti-strike and bending, high insulation, extendibility ,ect.
With the insulation rod, the meter can measure leakage current in high-voltage lines below 60kV and on-line current, and identify if zinc oxide arrester is moisture-affected or not. There are also other functions provided for the meter: peak value hold, data hold, data save and wireless data transmission. Given the condition that high-voltage clamp can be easily connected or disconnected to measured lines with the help of insulation rods, so the meter can be widely used in transformer station, power plant, mining, inspection center, electrician maintenance and repairing center for conducting leakage current testing and outdoor electrical operation.This kind of meter is also used as high/low-voltage current transformer ratio tester and zinc oxide arrester meter, that is to say it can respectively measure two times of loop current of current transformer and then calculate the ratio or reduced ratio. One thing to mention is: under general circumstances,considering the leakage current should be lower than 500uA for a running arrester, the meter can tell us the working status of the arrester. If checked out with leakage current higher than 500uA, the arrester may have been contaminated, moisture-affected or experienced aging, because the higher flow of leakage current it is, the more severe phenomena above are.

Brand of Product：	UNI-T
Part#：	UT255A 、 UT255B More Part#
Product Category：	High Voltage Clamp Ammeters More
Application：	More
Data Type：	User's Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2019/09/04
Version Number：
Data Encoding：	110401103626
Data Size：	7.1 MB

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