KYORITSU 6010B User Manual
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8.3 What is Uc?
Ground being imperfect in the Fig13, when R exists, when a fault current flows
to R, electric potential occurs. There is a possibility the person contacting in this
imperfect ground, it calls the voltage, which it occurs in the human body of this
time, called Uc.
When with the Uc Test letting flow IΔN to the RCD, the Uc is calculated.
Uc voltage is calculated based on the Rated Residual Current (IΔN) with the
impedance measured. KEW 6010B has two Uc functions as follow:
●Monitors Uc value
At "Uc" range, Uc value (0-100V) can be displayed.
●Compares Uc value with UL value (50V or 25V)
Before the RCD trip test at "RCD" range, the Uc value is compared
with the selected UL value. If Uc exceeds UL, the RCD trip test does
not operate and "UcH v" is displayed on the LCD.
Test current of Uc measurement is as follow:
Fig 13
IΔN
10mA
30mA
100mA
300mA
500mA
Test current
5mA
15mA
15mA
150mA
150mA