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When partial discharge occurs in the insulation material under high pressure, it is accompanied by electrical, acoustic and optical signals.
Because SF6 insulated electrical equipment (such as GIS, SF6 circuit breakers, etc.) is widely used. However, once there is a defect in SF6 insulated electrical equipment, it is not easy to find. One of the functions of ePD600 is specially designed for insulation diagnosis and local discharge fault location of SF6 insulated electrical equipment, and has been widely
The probability of partial discharge failure in the intermediate connector of high voltage cable is higher. For high and high voltage cables in operation, how to find the partial discharge in the joint in time can effectively avoid accidents. The second function of the ePD600 is specifically designed for the on-line measurement of partial discharge in cable connectors and terminal heads. The instrument can check the running status of cable accessories in the state of no power failure, easy to use, fast measurement, without interference from electromagnetic field, suitable for the status diagnosis and discharge fault monitoring of medium voltage cable connectors and terminals, usually used in the acceptance test of new construction cable accessories and the status diagnosis of cable joints in operation.
Instrument features：
● Portable, fully automatic measurement
● Live measurement, no need for equipment power outage, easy to use, fast measurement
● Using digital circuit technology, the instrument has stable performance and powerful functions
● Full Chinese menu, color LCD display, chart dynamic display of measurement results
● High measurement sensitivity, 1pC (or 1mV)
● Background measurement to eliminate noise interference
● Local discharge measurement at ultrasonic frequency, free from electromagnetic field interference
● Can save the measurement parameters and results
● Integrated design, built-in preamplifier, built-in rechargeable large capacity lithium battery, no external power supply
● Large capacity lithium battery power supply, continuous measurement for 5 hours
● Large capacity electronic hard disk, the measurement data can be transferred to the electronic hard disk, so that the field can save the "phase/particle" map up to 128
● Provide USB2.0 communication interface for data transmission with the computer, and the communication rate is greatly improved than RS-232
The data storage and query function of the host is easy to operate and intuitive, with batch deletion and batch upload of data
● Host computer data analysis and processing software, the host can be connected to an external computer, further processing of data analysis and printing
● Suitable for measuring local discharge, corona, and free particle defects
● Reinforced PVC packing transport box, light and durable, suitable for on-site mobile measurement
● Measuring cable intermediate connector and cable terminal release (optional)
Principle of measurement：
The measuring principle of ePD600 local discharge fault detector is Acoustic Emission principle (AE).
Show：
Using large screen graphic LCD display, friendly man-machine dialogue interface, real-time display of data and graphics.
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Continuous measurement method:： The following parameters are represented in a bar chart：
有效值：一个工频周期中的有效值信号
Period peak: The peak signal in a power frequency period
Frequency component 1: The signal level of the power frequency cycle
Frequency component 2: Signal level of double power frequency period
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Pulse mode：
Mainly used for the measurement of free particles. Each time a particle hits the shell, it emits a broadband transient sound pulse, which travels back and forth within the shell. The acoustic signal of the particle is the mixed signal of the local discharge of the particle end and the particle collision with the housing.
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Phase mode：
Mainly used for local discharge and corona measurement. A power frequency dependent amplitude-phase diagram is obtained using the synchronization unit (built-in), giving important information about where the discharge or collision occurs in the power frequency cycle. Used to determine whether there is a relationship with the power frequency cycle.
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Technical specification：
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Principle of measurement
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Principle of acoustic emission
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Measuring sensitivity
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1pC (or 1mV) can detect free particles as large as 2mm
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LCD display monitor
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Resolution 800×480 pixels, 64K true color LCD screen
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Port
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USB
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Power supply
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Lithium battery power, 12V, 6Ah
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Dimensions
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240×236×140mm
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Weight
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About 3kg
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Service environment
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Temperature -15 ~ 60℃, humidity below 95% RH
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Ordering Instructions：
Basic configuration：
1. host
2. acoustic emission sensor
3. data transmission line
4. Special signal coupler
5. transport case
6. charger
Optional configuration：
1. External amplifier with 10 m coaxial cable (length optional)
2. Cable joint release probe rod
3. Cable office discharge detection function
4. Sensor mounting device
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