HF-ET-803 Water-Cooled Generator Insulation Tester

Overview

This device is designed for measurement tests of water‑cooled generators, and can also perform insulation tests in laboratories or on‑site. It delivers output current over 25 mA and maximum output voltage up to 5000 V. Built‑in high‑precision micro‑current measurement system and digital voltage‑boosting system. Only one high‑voltage cable and one signal wire are required to connect the test sample. Measurements run automatically; results are displayed on a large‑screen LCD and stored in memory.

Alternative Names: Water‑Cooled Generator Insulation Tester, Water‑Cooled Insulation Tester, Generator Insulation Tester, Water‑Cooled Generator Insulation Characteristic Tester

Product Specifications

Item	Parameter
Testing Range	0.1 MΩ ~ 200 GΩ
Resolution	Min. 0.1 MΩ
Accuracy	±10%
Test Voltage	2500V; 5000V
Output Short‑circuit Current	≥20 mA
Display	Dot‑matrix LCD
Power Supply	AC220V
Ambient Temperature	-10 ~ 40 °C
Relative Humidity	20 ~ 80%
Overall Dimension	320×240×135 mm
Weight	5 kg

Product Features

1. Controlled by a 32‑bit microcontroller with full‑Chinese UI for easy operation.
2. Automatically calculates absorption ratio and polarization index. Automatically stores data at 15 s, 1 min, 2 min and 10 min for analysis.
3. Large output current: >20 mA at 2500 V; short‑circuit current ≥20 mA.
4. Fully‑enclosed high‑voltage generation module with built‑in protective resistors for high safety and reliability. Strong anti‑interference performance, suitable for field operation in extra‑high‑voltage substations.
5. Automatic discharge upon test completion with real‑time discharge‑process monitoring.

FAQ for Generator Insulation Tester

Q1: What is the HT2678B generator insulation tester mainly used for?

A: It is specially developed for water‑cooled generator insulation measurement. It can also be used for general insulation tests both in‑lab and on‑site substation environments. It supports 2500V / 5000V high‑voltage insulation resistance test.

Q2: What alternative names can this device be searched by?

A: Common aliases: Water‑Cooled Generator Insulation Tester, Generator Insulation Characteristic Tester, Water‑Cooled Insulation Tester.

Q3: What is its insulation resistance testing range?

A: Test range: 0.1 MΩ ~ 200 GΩ, minimum resolution: 0.1 MΩ, basic accuracy: ±10%.

Q4: What test voltage levels are available?

A: Two selectable test voltages: 2500V and 5000V. Short‑circuit output current ≥20 mA, which meets the special test requirements for water‑cooled generators.

Q5: What are the working environmental requirements?

A:

• Ambient temperature: -10℃ ~ 40℃
• Relative humidity: 20% ~ 80%
• Power supply: AC220V

Q6: What are the physical dimensions and weight?

A: Dimension: 320×240×135 mm; Weight: 5 kg, portable for field substation work.

Q7: Can it calculate Absorption Ratio and Polarization Index automatically?

A: Yes. The unit automatically calculates Absorption Ratio and Polarization Index. It records and stores data at 15s, 1min, 2min, 10min timestamps for further insulation condition analysis.

Q8: Do I need many cables to connect the DUT?

A: No. Only one high‑voltage cable + one signal wire are needed to connect to the test object for automatic measurement.

Q9: Does the instrument support automatic discharge after test?

A: Yes. It performs automatic discharge after test completion, with real‑time monitoring of the whole discharge process to improve on‑site operation safety.

Q10: Is it suitable for extra‑high‑voltage substation site with heavy interference?

A: Yes. Its high‑voltage module adopts fully‑enclosed structure with internal protective resistors. It features strong anti‑interference capability and high safety for substation field application.