Table of Contents

Product Introduction

The HF-SA-201 Intelligent Metal Oxide Arrester DC Parameter Tester is mainly used to conduct DC parameter tests for 10kV and below zinc oxide arresters in power generation & supply systems, railway power supply departments and scientific research institutes. As the 3rd-generation product upgraded from the 1st and 2nd generations, it boasts intelligent programming, smaller size, lighter weight, simple wiring, waterproof casing, elegant appearance and excellent portability.

Features & Main Functions

Feature Category	Detailed Description
Accurate & Repeatable Measurement	Based on hardware and software automatic control theory, it performs precise closed-loop regulation for 1mA current and 0.75 times DC reference voltage, so as to acquire stable DC reference voltage at 1mA current and leakage current under 0.75 times reference voltage.
One-Click Automatic Measurement	Controlled by a high-speed processor, the device automates complicated manual adjustment procedures. Simply press the measurement key, and it will automatically test the DC reference voltage at 1mA and leakage current at 0.75 times reference voltage within only 7 seconds, ideal for field testing work.
Comprehensive Multi-Layer Safety Protection	Equipped with overvoltage protection and battery undervoltage protection to fully guarantee operator safety. High voltage output is only available during testing; high voltage will be automatically cut off once measurement finishes. Residual voltage across the arrester is displayed in real time, and operators can only disconnect the device after residual voltage drops to a safe level.
Real-Time Measurement Display	It continuously displays 1mA current, U₁mA voltage, leakage current at 0.75U₁mA and residual voltage throughout the testing process. All measured values are clearly presented on the liquid crystal screen once testing completes.
Automatic Qualification Judgment	It can automatically judge whether various types of arresters are qualified. Threshold values of U₁mA voltage and 0.75U₁mA leakage current are configurable, with default parameters set for 10kV arresters.
Waterproof & Wear-Resistant Cabinet	Adopts fully enclosed hand-held waterproof protective casing.
Color Touch Screen Display	Equipped with a 5-inch 854*480 resolution capacitive color touch screen, enabling clear data viewing under all lighting conditions.
Data Printing & Storage	Stores up to 500 groups of test records. On-site and historical data can be printed directly or exported to a USB flash drive in TXT format.
Additional Functions	Built-in calendar & clock, battery voltage indication, ambient temperature and humidity detection.
Backlight & Standby Configuration	Adjustable backlight contrast, standby brightness and standby time settings are available.
Charger Input Voltage	AC 100V~240V, 50/60Hz

Technical Specifications

Parameter Items	Technical Data
Maximum Output Voltage	35kV
Maximum Output Current	1.2mA (at 30kV)
Maximum Output Power	36W
Voltage Measurement Accuracy	±0.5%FS ±2 digits
Minimum Voltage Resolution	0.01kV
Current Measurement Accuracy	±0.5%FS ±2 digits
Minimum Current Resolution	0.1μA
Voltage Ripple Factor	1%
Power Supply	Built-in lithium battery pack, 37.8V, 3200mAh
Operating Ambient Temperature	-10℃ ~ +50℃
Relative Humidity	≤85% (25℃)
Overall Dimensions & Weight	375mm×310mm×155mm, 5.7kg (with all accessories)

Packing List

No.	Item Description	Qty	Unit	Remarks
1	Main Tester Unit	1	Set	Core testing host
2	High Voltage Test Cable Assembly	1	Set	High voltage connecting wires for arrester testing
3	Grounding Wire	1	Pc	For reliable earthing connection
4	Power Charger Adapter	1	Pc	AC 100-240V universal charger
5	USB Flash Drive	1	Pc	For exporting test data in TXT format
6	Printed Operation Manual (English Version)	1	Copy	Detailed operation & technical guide
7	Factory Calibration Certificate	1	Copy	Metrological calibration document
8	Waterproof Shockproof Carrying Case	1	Pc	Integral packaging box for portable storage & transportation
9	Spare Fuse	2	Pcs	Consumable spare parts
10	Inspection Packing List	1	Copy	For customs clearance & receiving check

Metal Oxide Arrester DC Parameter Tester – FAQ

Q1: What main parameters can this MOA tester measure?

A1: It accurately tests the U1mA DC reference voltage and 0.75U1mA leakage current of metal oxide arresters, which are the core indicators to judge arrester aging and insulation performance.

Q2: Is the testing process fully automatic?

A2: Yes. It supports one-key automatic testing. The whole test completes within 7 seconds without manual voltage adjustment, greatly improving on-site working efficiency.

Q3: Does the device have high-voltage safety protection?

A3: Absolutely. It features overvoltage and undervoltage protection, automatic high-voltage cutoff after testing, and real-time residual voltage display to ensure safe operation.

Q4: Can the tester store and export test data?

A4: It can save up to 500 groups of test records. Data can be printed directly or exported via USB flash drive in TXT format for further analysis and filing.

Q5: Is the machine suitable for outdoor field testing?

A5: Yes. Adopting fully enclosed waterproof casing, lightweight body and wide working temperature range (-10℃~+50℃), it is perfectly designed for substation on-site maintenance.

Q6: Can it judge whether the arrester is qualified or not?

A6: Yes. The system supports automatic qualification judgment with configurable threshold parameters, and provides default standard data for 10kV arresters.

Q7: What is the maximum output voltage of this tester?

A7: The maximum output voltage is 35kV, which covers the testing requirements for 10kV and lower voltage level arresters.

Q8: Does the tester support universal global voltage charging?

A8: Yes. The charger input is AC 100V~240V 50/60Hz, adaptable to most countries’ power grid standards.

Q9: How is the test data display effect?

A9: Equipped with a 5-inch color capacitive touch screen, it clearly displays real-time current, voltage and residual voltage data under various lighting conditions.

Q10: Is the device portable for regular inspection work?

A10: Yes. Compact structure, lightweight (5.7kg with accessories) and equipped with a dedicated protective case, easy to carry and transport.

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