Discharge counter
Product Uses
The JSC-4 discharge counter (hereinafter referred to as the discharge counter) is an instrument that uses a current transformer to record the number of discharges in a surge arrester. It is intended for indoor installation.
Structure and Performance
The discharge counter consists primarily of a high-performance sampling current transformer (CT), a signal conditioner, a 4-digit LCD counter, a lithium battery, and other components. It operates by detecting the discharge current passing through the surge arrester, which induces a current signal in the CT. This signal is then conditioned by the signal conditioner into a form suitable for driving the electronic counter. The conditioned signal is transmitted via shielded cable to the input terminal of the electronic counter, thereby recording the number of operations of the surge arrester (see Figure 1). The counting circuit employs an ultra-low-power large-scale integrated circuit, with a total power consumption of only 2 microamperes. The battery can provide reliable service for more than 10 years.
Implementation Standard
GB/T10492
External appearance and installation dimensions of the discharge counter
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