Voltage Detector Functional Test Device

The HZG2001 voltage detector functional test device is developed in accordance with power industry standard DL740—2000. It is designed for accurate performance verification of high-voltage electroscopes, easy for technicians to operate.

This equipment covers voltage grades: 10kV, 35kV, 66kV, 110kV, 220kV, 330kV. Custom version is available for 500kV and above. With global power grid operation safety requirements continuously upgraded, regular calibration and preventive test for high voltage voltage detectors is mandatory for power utilities, testing institutes and electrical safety labs. It is widely adopted for routine inspection of live-line voltage detectors, owning stable market demand in high-voltage safety testing field.

Key Technical Parameters

The device adopts telescopic insulating support structure, including H1, H2, H3 adjustable insulating poles, replaceable metal rings and metal balls.

Dimension Table for Electroscope with extended contact electrode

Dimension Table for Electroscope without extended contact electrode

Horizontal Distance of Electrodes

Core Advantages

• Complies with DL740—2000 power industry standard
• Telescopic multi-section insulating tubes, flexible height adjustment
• Replaceable metal ring & metal ball to match different voltage grades
• Supports startup voltage measurement, in-phase & anti-phase interference immunity test
• Two sets of layouts: for electroscopes with / without extended contact electrode
• Customizable design for 500kV and higher voltage electroscopes

Application Scope

• Functional inspection & periodic calibration of high voltage electroscopes / voltage detectors
• Measurement of startup operating voltage
• Anti-interference performance test (in-phase & reverse-phase interference electric field)
• Laboratory verification for live working safety tools

Test Criteria

Startup Voltage Requirement

• Class A: 0.15UN ≤ Ust ≤0.40UN
• Class B: 0.15UN·max ≤ Ust ≤0.40UN·min
• Class C: 0.10UN·max ≤ Ust ≤0.45UN·min
• Class D: Custom startup voltage according to user requirements

Anti-interference Test

1. In-phase interference: apply 0.4 or 0.45 rated voltage. Pass if detector indicates voltage exists.
2. Reverse-phase interference: apply 0.6 rated max voltage. Pass if no voltage indication appears.

FAQ

Q1: What is HZG2001 used for? A1: It is a special test rig to verify the function of high voltage electroscopes(voltage detectors). It tests startup voltage and anti-interference performance, complying with DL740-2000 power industry standard.

Q2: What voltage grades of voltage detectors can it test? A2: Standard version covers 10kV,35kV,66kV,110kV,220kV,330kV. We can customize the device for 500kV and higher voltage detectors.

Q3: What tests can this device perform? A3: Two main test items: startup voltage measurement, and anti-interference test including in-phase and reverse-phase electric field interference.

Q4: What is the difference between the two test layouts? A4: One layout for electroscopes with extended contact electrode (mostly used in substations). The other for electroscopes without extended electrode (mostly for overhead transmission lines).

Q5: What space clearance is required for the test site? A5: For rated voltage ≤35kV, keep 1m clearance from surrounding objects. For voltage >35kV, maintain at least 2m clearance to reduce electromagnetic interference.

Q6: Is it easy to switch between different voltage grades? A6: Yes. It uses telescopic insulating poles and replaceable metal rings/spheres. Adjust H1/H2/H3 height and electrode spacing according to rated voltage.

Q7: What is the startup voltage acceptance rule for voltage detectors? A7: It is divided into 4 classes based on detector type. The measured startup voltage must fall into the corresponding range to pass the inspection.