Parts And Controls - koban KRB-01 Mode D'emploi

EN KRB-01
LOOP RESISTANCE METER

5 PARTS AND CONTROLS

1-Digital screen
2-Backlight button
3-P-E, P-N, Lights
4- REVERSE light P-N
5-Test button
6- Rotary function switch
7- Power connector
8- Pothook
9-Battery cover
6 MEASUREMENT OF LOOP IMPEDANCE AND SHORT POTENTIAL
CURRENT
If there is RCD or fuse in the circuit, you must test loop impedance
According to IEC 60364, each loop must
comply with the formula: Ra≤50 / Ia Ra:
impedance of loop 50: maximum of tactile
voltage Ia: the current that can cause the
protection device to break the circuit in 5
seconds.
When the protection device is RCD, Ia is
the residual residual current IΔn.
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