The purpose of the hand-held partial discharge detector test is to discover defects in the structure and manufacturing process of the device. For example, the local electric field strength inside the insulation is too high; the metal parts have sharp corners; the electrical connection between the electric conductors is poor, and the partial discharge test is used to eliminate these defects and prevent partial discharge and multiple insulation to cause damage.
Partial discharge measurement methods are divided into two categories: electrical measurement and non-electrical measurement. The application of electric measurement method is more pulse current method and radio interference voltage method. Electrical measurement has been widely used for quantitative measurement of partial discharge.
The hand-held partial discharge detector meets the requirements of the "partial discharge measurement" standard for its detection method, measurement circuit and technical performance parameters. It is developed by the principle of pulse current method, and adopts advanced anti-interference component and door display circuit. It has strong anti-interference ability and has four high-frequency elliptical scans. It is suitable for type, factory test and new product development test of high-voltage products. Quantitative testing of partial discharges of motors, transformers, cables, bushings, capacitors, transformers, surge arresters, switches and other high voltage electrical appliances.
A hand-held partial discharge detector is used to detect local discharge sources in medium and high voltage (MV/HV) equipment. If no discharge is detected, it does not mean that the medium and high voltage equipment has no discharge activity. The discharge source often has an incubation period, and the insulation performance may also fail due to other reasons than partial discharge. If there is a considerable discharge in the equipment connected to the medium and high voltage power system, the equipment maintenance department should be notified immediately.
Handheld partial discharge detector product features:
1, portable design, sturdy and durable, easy to use
The detection host is a portable design, achieving the jun grade protection level, dustproof, shockproof and waterproof. The outer casing is made of titanium alloy material and processed by CNC machine tool. The shell is firm and reliable and light in weight. It adopts touch screen design and just clicks the screen. You can complete the related operations and use them in a live environment where it is not convenient to connect an external mouse. The 6.5-inch large-screen high-brightness liquid crystal display can be used to clearly display graphic data in the sun.
2. High-sensitivity sensor that can sensitively reflect the partial discharge state inside the device
Using a wide-band UHF sensor, the detection band can cover 300MHz-3GHz (optional in any frequency band), which can effectively collect the partial discharge signal inside the GIS device.
The ultrasonic sensor adopts the current advanced technology, and the actual application verification can detect the weak discharge signal. The sensor has passed the technical test of the national department to ensure that the partial discharge signal inside the GIS can be effectively detected.
3, the system uses multi-channel data acquisition
Simultaneous analysis and processing of electromagnetic waves, ultrasonic waves and other signals generated by partial discharge can be performed simultaneously.
4, the connection is simple and convenient
The system adopts an easy-to-use connection method, and the BNC and SMA interfaces are selected between the sensor and the host for easy use.
5, humanized software design, easy to use
The device display interface is human-friendly, and the screen display is clear in different environments, which is convenient for field testers to quickly read; the device software adopts traditional Windows software interface, the software interface language is full Chinese display, waveform display interface, trend graph display interface, parameter setting The functional modules such as the interface are user-friendly, and the operation is simple and convenient.
Plastic Injection Mold is an assembly of parts containing within it an impression into which plastic material is injected and cooled. It's the impression which gives the moulding its form. The impression may, therefore, be defined as that part of the mould which imparts shape to the moulding.
The impression is formed by two mould members:
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The cavity, which is the female portion of the mould, gives the moulding its external form.
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The core, which is the male portion of the mould, forms the internal shape of the moulding.
Cavity and core plates: This is illustrated for a simple container, the basic mould, in this case, consists of two plates. Into one plate is sunk the cavity which shapes the outside form of the moulding and is therefore known as the cavity plate.
Similarly, the core which projects from the core plate forms the inside shape of the moulding. When the mould is closed, the two plates come together forming a space between the cavity and core which is the impression.