is determined. Cx in Diagram 1(b) is grounded product, and Cx terminal in the
instrument is grounded directly. Icx flows from HV terminal of tested article to
sampling resistor in the instrument, thus the total current value is determined.
(a) Current vector method
(b) Equivalent circuit of tested article
Diagram 2
VII. Wiring methods for common devices
1. Explanation for instrument leading-out terminal:
HV —— HV terminal of measuring leading cable of instrument (
with
dangerous voltage
).
CX ——Input terminal of measured current in case of UST.
Ground terminal of instrument, connected with the ground in a reliable
way when using.
2. Reference wiring
2.1 UST, internal reference capacitor, internal HV (conventional UST):
HV shell
HV core
HV
Shell
Shell
UST I-CN
Core
5-Hz I-UN
GND
11
