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HM306 Zinc Oxide Arrester Resistive Current Tester Wiring and Setting Parameter Video
Product Overview & Application Scenarios

Product Overview
The HM306 Zinc Oxide Surge Arrester Resistive Current Tester is a high-precision instrument specifically designed for field and laboratory testing of the electrical performance of zinc oxide surge arresters. Its core functionality encompasses the measurement of key parameters including total current, resistive current, capacitive current, harmonic content, and active power. Featuring waveform display and data printing capabilities, it complies with the power industry standard DL474.5-92, ensuring authoritative and reliable test results.
Applications
Power System Maintenance: Suitable for online monitoring (live testing) and outage inspections of arresters in substations, power plants, and other facilities.
Laboratory Analysis: Used for performance evaluation and fault diagnosis of zinc oxide arresters.
Field Operations: Portable integrated design, ideal for rapid detection in outdoor or complex environments.

Key Features & Advantages
1.Color touch panel:800×480 7'' HD color TP, man-machine communication.
2.Wireless long distance: compatible wireless sync, wireless transfer distance over 1500 meters, customized to 5000 meters.
3.Multiple synchronous modes:support 485 wired synchronization (with voltage), wireless sync, find the voltage reference by software calculation (without voltage), support 485 sync.
4.Charged/uncharged compatibility: used for arresters charged/uncharged or laboratory, etc…
5.Large range collection: voltage collection range 0-250V,current collection range 0-20mA.
6.Three-phase synchronous measurement:three- phase current and three-phase voltage can be tested at the same time, which improve working efficiency; also support single-phase or two- phase test, easy to select.
7.Safe and reliable:Inside only has a weak current; voltage does not exceed 8.4V; current and voltage sensors are completely isolated; safe and reliable.
8.Optional voltage mode:support to take voltage of three-phase or phase B as voltage reference; support the use of sensor board to take electric field intensity of phase B as voltage reference(optional). It is convenient for voltage sampling.
parameter Description
| 1. Power supply | internal lithium battery or DC8.4V adapter |
| 2. Measurement range | Leakage current: 0-20mA (extensible) (optional:current clamp sensor 0-20mA) Voltage: 30-250V(extensible) (optional: input range of electric field intensity:30kV/m~300kV/m.) angle:0-306º Resistive current:0-20mA(extensible) Capacitive current:0-20mA(extensible) |
| 3. Measurement accuracy | current: full current>100μA: ±5% reading±1 word voltage:reference voltage signal>30V: ±5% reading±1 word |
| 4. Measurement parameters | leakage current:full current waveform, effective value of fundamental wave, peak. resistive component of leakage current:waveform 1,3,5,7,9 times effective value positive peak Ir+, negative peak Ir- capacitive current fundamental wave voltage:voltage waveform, voltage effective value phase angle difference, power consumption |
| 5. Voltage basic signal sampling method | wire sync: 40 meters (extensible) wireless sync: >1500 meters (extensible) |
| 6. Lithium battery parameters | charging time > 2.5 hrs continuous working time > 7hrs interval working time > 7×24hrs |
| 7. Overall dimensions | 42×34×18(cm) |
| 8. Weight | 7.5kg |
Maintenance & FAQs
Summary: The HM6020A, with its high precision, portability, and intelligent design, is the ideal tool for zinc oxide arrester testing in the power industry. It meets both laboratory and field requirements, enhancing operational efficiency and safety.
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