Product Description
ED8030 Zinc Oxide Surge Arrester Online Monitoring and Analysis System, integrating both value measurement and relative value comparison detection techniques, effectively resolves the issues of measuring dielectric loss and resistive current in the presence of on-site interference. It is suitable for online inspection of dielectric loss and capacitance of equipment such as current transformers, CVT, bushings, and coupled capacitors under operating conditions. It can also be used for online measurement of resistive current and total current of zinc oxide surge arresters.
ED8030 Type Zinc Oxide Surge Arrester Online Monitoring and Analysis System, featuring an integrated sensor design structure with a high-precision core-type CT within the instrument. Simply install the dedicated sampling protection unit beneath the electrical equipment being tested, and this portable testing instrument can be used to regularly inspect the characteristic parameters of operating current transformers, CVTs, coupled capacitors, insulators, and surge arresters, aiming to promptly detect insulation defects.
The ED8030 type zinc oxide lightning arrester online monitoring and analysis system sampling protection unit is designed with the principle of simple sampling and reliable protection, without causing any adverse effects on the normal operation of electrical equipment. Due to the low input impedance of the detector, it is directly connected in series with the sampling circuit during measurement, and is unrelated to the component parameters of the sampling protection unit. The detector itself can also be calibrated in accordance with the conventional instrument methods, ensuring the stability and reliability of the entire online inspection system for long-term operation, while also reducing the construction cost.
The successful development of the ED8030 type zinc oxide lightning arrester online monitoring and analysis system is attributed to the use of high-performance current sensors and advanced ARM embedded computer systems. The block diagram of its working principle is shown below.
Addressing the issues with previous similar testing equipment and the deficiencies in testing methods, the product has specifically considered and properly resolved several aspects, including:
Utilizing high-precision current sensors with frequency-independent self-calibration capabilities and advanced digital phase detection technology, we effectively address issues related to dielectric loss test accuracy and stability. This solution completely eliminates the interference from harmonics and the impact of environmental temperature changes.
(2) Enhanced with the detection function for the phase-to-phase capacitance type equipment's dielectric loss difference and capacitance ratio, it not only prevents distortion of test results due to using the PT secondary side voltage as the reference signal, but also helps to reduce the interference from phase-to-phase electric field.
(3) Utilize digital processing technology to achieve full compensation for the capacitance current of surge arresters, reducing the impact of harmonic interference on the resistive current test results of surge arresters, allowing for accurate measurement of the peak values of resistive current and its fundamental component.
(4) With high-performance sensors and advanced ARM embedded computer systems, the multi-functional operation is achieved, laying the groundwork for future medium dissipation measurement under high voltage conditions.
The tester offers two measurement methods when measuring capacitive equipment (CT, CVT, bushings, coupling capacitors) as shown in the figures below (left for relative method, right for direct method). Considering that the inherent error of the on-site PT can sometimes severely affect the measurement accuracy of dielectric loss, the relative measurement method should be prioritized. This involves directly measuring the difference in dielectric loss and the capacity ratio between two identical, same-type devices, and making a judgment based on their relative change trend.
The tester offers two measurement methods for measuring zinc oxide lightning arresters, as shown in the following figures: the capacitive device compensation method (left figure) and the PT signal compensation method (right figure). In the capacitive device compensation method, the capacitive current compensation signal is directly provided by sampling the protective unit from nearby capacitive devices, effectively avoiding the inconvenience caused by using the PT secondary signal.
Product Alias:
Zinc Oxide Surge Arrester Online Monitoring, Online Monitoring System for Surge Arrester, Monitoring System, Nitrogen Oxide Online Monitoring System, Zinc Oxide Surge Arrester Tester, Zinc Oxide Surge Arrester, Zinc Oxide Surge Arrester Models, Metal Oxide Surge Arrester, Zinc Oxide Metal Oxide Surge Arrester
Product Features
The ED8030 type zinc oxide surge arrester on-line monitoring and analysis system utilizes high-precision external core current sensors or clamp-on sampling sensors in place of the previously commonly used "sampling protection units" (which include multiple switch circuits, used during testing to switch the final screen current to the testing equipment, posing the risk of an open circuit at the final screen, and requiring the operation of multiple short-circuit strips to direct the final screen current to the testing equipment). The sampling unit employs sensors with a core-through structure, installed locally near the equipment, ensuring no breaks in the final screen wiring and with a minimal wire length, thereby fundamentally avoiding potential safety hazards such as open circuits. This sensor accurately detects input signals within the range of 100μA to 1000mA.
The ED8030 type zinc oxide lightning arrester online monitoring and analysis system features a low sensor input impedance, capable of withstanding the effects of 10A AC current and the impact of 10kA lightning currents, meeting the conditions for online detection.
The ED8030 type zinc oxide surge arrester online monitoring and analysis system sensor features a pressure-cast aluminum shell sealed waterproof design. The secondary output utilizes a waterproof cable connector for easy testing connections. After the sensor is installed, it is normally non-powered. For testing, simply connect the sensor's secondary cable, enabling "plug and play" functionality without any operation required on the final screen signal lead.
The core processor of the ED8030 type zinc oxide arrester online monitoring and analysis system employs a 32-bit floating-point high-performance digital signal processor (DSP) from Texas Instruments (TI), along with an externally expanded 16-bit, high-speed, multi-channel synchronous sampling analog-to-digital converter (A/D). This setup enables real-time measurement and high-precision calculation of the monitored values. It is capable of simultaneously monitoring multiple devices.
The ED8030 type zinc oxide surge arrester online monitoring and analysis system offers two methods of online dielectric loss detection, allowing for the measurement of the difference in dielectric loss and the capacity ratio of two identical capacitive devices. Additionally, it can use the PT secondary side voltage as a reference signal to measure the capacity and dielectric loss of the device.
The ED8030 type zinc oxide surge arrester online monitoring and analysis system utilizes self-compensating high-precision current sensors and advanced digital filtering technology, effectively addressing the issues of test accuracy and stability for dielectric loss. With comprehensive electromagnetic shielding measures and cutting-edge digital filtering processing technology, it ensures that the results of dielectric loss testing are not affected by harmonic or pulse interference, boasting a detection accuracy as high as ±0.05%.
The ED8030 type zinc oxide surge arrester on-line monitoring and analysis system adds the function of detecting the differential of inter-phase capacitance type equipment dielectric loss and the capacity ratio, which not only avoids distortion of the dielectric loss test results caused by using the PT secondary side voltage as the reference signal, but also helps to reduce the impact of inter-phase electric field interference.
ED8030 Type Zinc Oxide Surge Arrester Online Monitoring & Analysis System with 320A 240-inch LCD screen, used to display data such as voltage, current, dielectric loss, resistive current, and capacitive current.
The ED8030 type zinc oxide lightning arrester online monitoring and analysis system can record all monitored data and continuously detect and store data from 255 devices.
The ED8030 type zinc oxide arrester online monitoring and analysis system only requires the connection of a PT voltage line during zinc oxide arrester or voltage mode testing, without the need for a protective resistor.
The ED8030 type zinc oxide lightning arrester online monitoring and analysis system utilizes an external sensor or clamp-on sampling sensor, the "sampling protection unit," which allows for a convenient upgrade from "live testing" to "online monitoring" mode while the equipment is operating normally. No need to remove the installed sensors or shut down the equipment; simply add the monitoring unit (IED) is required.
The ED8030 type zinc oxide lightning arrester on-line monitoring and analysis system features a portable design structure, easy operation, and an internal lithium battery that can sustain continuous operation for 8 hours, fully meeting the requirements for on-site use.
Technical Specifications
Current Mode//
Current Measurement Range 1mA to 1000mA RMS, 50Hz / 60Hz
Current ratio accuracy ±0.5% reading + 10 uA
Phase Angle Measurement Range 0.000~359.999°
Phase Angle Measurement Accuracy ±0.023° or ±0.04% insertion loss (excluding magnetic field interference)
Capacitance Ratio Measurement Range 1:10,000 to 10,000:1 (with 4 decimal places displayed)
Capacitance Ratio Measurement Accuracy ±(0.5% reading + 5 digits)
Medium Loss Measurement Range Tanδ = -200% to 200%, resolution 0.001%
Medium Loss Measurement Accuracy ± (0.5% reading + 0.0004)
(2) Voltage Type//
Voltage Measurement Range 1～300V
Voltage Measurement Accuracy ±(0.5% of reading + 10mV)
Measurement Range 3V to 300V RMS, 50Hz / 60Hz
Input Resistance 200kΩ
Phase Angle Measurement Range 0.000~359.999°
Phase Angle Measurement Accuracy ±0.023° or ±0.04% loss
Capacitance Measurement Range 10pF～0.5uF
Capacitance Measurement Accuracy ± (0.5% reading + 1pF)
Medium Loss Measurement Range Tanδ = -200% to 200%, resolution 0.001%
Medium Loss Measurement Accuracy ± (0.5% of reading + 0.0004)
(3) Zinc Oxide Surge Arrester Measurement Method//
Full Current Measurement Range 0~100mA RMS
Full Current Measurement Accuracy ±(reading x 5% + 5uA)
Resistance Current Measurement Range Irp=10μA～100mA
Resistance Current Measurement Accuracy Measurement Accuracy: ±(5% of reading + 5uA)
Capacitive Current Measurement Range Icp=100uA～1000mA
Capacitive Current Measurement Accuracy Measurement Accuracy: ±(5% of reading + 5uA)
Phase Measurement Range 0.000~359.999°
Phase Measurement Accuracy ±0.1°
Frequency Measurement Range 45Hz-65Hz
Frequency Measurement Accuracy ±0.5Hz
(4) Core Ground Current Measurement
Current Measurement Range Range: 0～1A; Small Resolution: 0.01mA
Iron core current measurement accuracy Core grounding current measurement accuracy: ±(0.5% reading + 0.1mA)
(5) Other Parameters /
Capacitive Device Sampling Method 1. Voltage reference side supports two modes:
A. PT Secondary Side Sampling B. Capacitive Equipment End Screen Sampling
Surge arrester sampling method The sample side zinc oxide lightning arrester base experienced a short circuit, and direct sampling was taken from the top. The sampling device must have on-site anti-interference capability.
Data stability duration 10s
Battery Runtime 6 hours (Lithium-ion Battery)
Charging Power Supply 220V, 50/60Hz
Additional Features Incl. a mini printer for printing out measurement results.
Equipped with RS232 interface
