一、use

HYJCQ type arrester three-phase discharge monitor (hereinafter referred to as the monitor), it is a high-tech high-tech that connects a high-precision digital collector to the ground wire of the arrester in series to monitor the leakage current of the arrester and record the discharge times and discharge time of the arrester Electronic equipment,

HYJCQ type arrester three-phase discharge monitor can completely replace ordinary JS-8 discharge counter and JCQ arrester three-phase discharge monitor. The instrument has a simple display interface and a sophisticated monitoring system, which can dynamically monitor related parameters such as the leakage current and the number of actions of the arrester. It is equipped with a 485 communication interface and a wireless communication system, which is convenient to form an integrated automation system and is suitable for the use of intelligent substations.

二、装置工作原理

The HYJCQ type arrester three-phase discharge monitor is mainly composed of a high-precision digital collector and an intelligent display unit (as shown in Figure 1). The arrester is grounded through the device with a high-precision digital collector, and the digital collector collects the arrester leakage current signal and the discharge current signal , The data is transmitted to the central processing unit of the device through the isolation conversion unit, so as to realize the recording of the operation times, operation time and leakage current of the arrester. The intelligent display unit can measure the unbalanced leakage current of the three-phase center point according to the different phase relationship of the three-phase leakage current of the arrester, and can judge the early failure of the arrester through the sensitive characteristic of the neutral point current.

This device has the function of sound alarm and display alarm. The device can perform sound alarm and display alarm according to the leakage current of the three-phase arrester and the magnitude of the neutral point current value. The alarm system of the device can be triggered when one of the four current values exceeds the standard. The neutral current has extremely high alarm sensitivity. When the three phases are normal (balanced), the zero sequence current is extremely small, such as the early occurrence of a certain lightning arrester When the leakage current increases slightly, the zero-sequence current will increase several times, so it can be very sensitive to judge whether the arrester is working normally.

三、Product functions and features

The HYJCQ arrester three-phase discharge monitor can measure the leakage current and discharge times of the arrester sensitively and precisely. The monitor has the advantages of accurate counting, large storage capacity, intelligent query, simple display interface, small structure, and panel installation. The performance of the arrester three-phase discharge monitor meets the requirements of the standard JB/T10492-2011 "Monitoring Device for Metal Oxide Arrester". Its main performance: The discharge counter is in waveform 8/20us, amplitude: 50A~100kA, can operate accurately and reliably, has low residual voltage, and has a large current capacity. The leakage current display range is 0~3mA.

1. Strong anti-interference ability, input signal range: 0.1mA~200A;

2. With panel fault display and sound alarm function, provide relay alarm signal output;

3. It has the functions of real-time viewing of leakage current, fault record viewing of discharge times and discharge time;

4. The clock in the device can still ensure accurate timing after power failure, without power failure to reset, the memory data has a power failure protection function, which can ensure that the recorded data will not be lost during the storage period (100 years) 5 . All alarm thresholds can be set through the panel;

6. RS485 communication interface, which can realize multi-machine communication or communication with the upper computer, suitable for use in intelligent substations

7. With wireless communication and collection function (optional function)