1
I.Overview
Lightning arrester is an important electrical equipment in power network to protect
power equipment from over-voltage. Normally, the action of the arrester and leakage
current are monitored through the arrester monitor. Due to poor sealing, the monitor may
enter water or moisture during operation, causing internal element corrosion, or other
reasons, the monitor counter cannot operate normally, and the leakage current indication
is not accurate. Therefore, according to
《
The Regulations
》
, the arrester monitor should
be checked once a year
。
The reliability of counter operation is very important for power system. It is an important
parameter to record the number of lightning strikes received by the arrester in normal
operation. It can provide an important basis for the power system workers to inspect the
arresters.
II.Principle
Figure 1 shows the principle wiring diagram of HZJS action counter. Figure 1 (a) is
the basic structure of HZJS-type action register, namely the dual-disc structure.
Figure 1. Schematic wiring of hzjs-type action register
(a)HZJS Type
；
(b)HZJS-3KV Type
R
1
、
R
2
-Non-linear resistance
；
C-Energy storage capacitor
L-Register coil
；
D
1
~
4
Silicon diode
When the arrester operates, the discharge current flows through the valve sheet R1,
the voltage drop on the valve sheet R2 charges the capacitor C, and then C discharges
