HZJS-3 1.6kV AC DC Lightning Arrester Counter Testing Equipment

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.

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-3 Type

R1、R2-Non-linear resistance；C-Energy storage capacitor

L-Register coil； D1~4Silicon 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 the inductance coil L of the electromagnetic counter, making it rotate one grid and record one time. Changing the resistance of R1 and R2 can make the recorder have different sensitivity. The general minimum action current is 100A (8/20 s) impulse current. Because there is a certain pressure drop on R1, it will increase the residual voltage of arrester, so it is mainly used for high voltage arrester over 40 kV.

Fig. 1 (b) represents the structure of the type of motion recorder, which is a rectifying structure. When the arrester operates, the voltage drop on the high temperature valve sheet R1 is charged to capacitor C by full wave rectification, and then C discharges L of the electromagnetic counter to make it count. The resistance value of the valve piece R1 of the counter is small (the pressure drop at 10 kA is 1.1 kV), the flow capacity is large (1200 A square wave), and the minimum operating current is 100 A (8/20s) impulse current.

III.Technical Parameter

1、Output voltage：DC1600V ±5%

2、Interval time：≥30s

3、Power supply：AC200V±10% 50Hz±2%

4、Shock current：≥100A（8/20μs）