8
9
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.
II. Electrical Symbols
Extreme danger! To avoid personal injury or accidents in case of
electric shock, observe safety rules strictly.
Danger! To avoid personal injury or accidents in case of electric
shock, please follow safety notes.
Warning! Confirm to the safety instructions, otherwise it may cause
personal injury or damage to the meter.
Alternating Current
AC
Direct Current
DC
UT255A
10uA
600A
10uA
33mm
III. Model Comparison
Model
Range
Resolution
Jaw Size
Notes
General Type
Special, with
wireless
transmission
function
UT255B
10uA
600A
10uA
33mm
under general circumstances
