PLZ-4W
Installation and Preparation 2-11
Load wire inductance
The load wiring has an inductance (L). When the current (I) varies in short time
period, it generates a large voltage at both ends of the wiring cable. This voltage
applies to all of the load input terminals of the PLZ-4W when the impedance of the
EUT is relatively small. The voltage generated by the load wire inductance (L) and
the current varaiation (I) is expressed using the following equation.
Fig. 2-7
Load wire and inductance
In general, the wire inductance can be measured approximately 1
μ
H per 1 meter. If
the 10 meters of load cables is wired between the EUT and the PLZ-4W with the
current variation of 10 A/
μ
s, the voltage generated by the wire inductance will be
100 V.
The negative polarity of the load input terminal is the reference potential of the
external control signal, therefore, the device connected to the external control termi-
nal may get malfunctioned.
When operating under the constant voltage (CV) mode or constant resistance (CR)
mode or constant power (CP) mode, the load current is varied by the voltage at the
load input terminal, so the operation can be affected easily by the generated voltage.
The wiring to the EUT should be twisted and the shortest as possible.
EUT
PLZ-4W
L
I
Δ
I/
Δ
T
E
Load input terminal
+
-
Содержание PLZ-4W Series
Страница 10: ...VIII Contents PLZ 4W ...
Страница 20: ...1 10 General Information PLZ 4W ...
Страница 38: ...2 18 Installation and Preparation PLZ 4W ...
Страница 90: ...5 30 Basic Operation PLZ 4W ...
Страница 192: ...9 10 Specifications PLZ 4W ...
Страница 214: ...A 22 Appendix PLZ 4W ...