Kyoritsu 6010B User Manual download pdf (Page 24)

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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

150

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Kyoritsu 6010B User Manual Page 24