Circuit breaker analyzer UHV-408

electrical resistancevoltagevelocity

Introduction
The UHV-408 is a portable analyzer for dynamic testing of high-voltage circuit breakers. It measures mechanical dynamic characteristics across technologies and voltage levels (oil, vacuum, SF6, GIS) and supports simultaneous acquisition on up to 12 contact channels, providing time, travel, velocity, coil current and coil resistance measurements with waveform capture.

Technical parameters
Time measurement: internal/external trigger, 1 ms–10000 ms, resolution down to 0.01 ms; accuracy ≤200 ms: 0.05% ± 0.1 ms.
Velocity measurement: linear and angle sensors; linear range 0.01–20.00 m/s (0.1 mm sensor); 345° angle encoder with 0.01° resolution.
Travel measurement: standard linear sensor 0–50 mm (resolution 0.1 mm); optional linear sensors 100–1000 mm; encoder range 0–1000 mm.
Current/resistance: max current 30 A (resolution 0.01 A); coil resistance up to 1000 Ω (resolution 0.01 Ω).
Power supply: AC 220 V ±10%, 50 Hz ±10%; DC output adjustable 20–270 V, short-time DC220V ≤ 20 A, power 4400 W.
External trigger: AC/DC 10–300 V, current ≤ 120 A.
Operating environment: -20 °C to +50 °C; relative humidity ≤ 90%.

Features

• Compatible with SF6 switches, GIS assemblies, vacuum breakers, oil breakers, vacuum contactors and special circuit breakers; supports measurement of up to 12 metal contact points (6 main + 6 auxiliary) with waveform recording.
• 7-inch sunlight-readable color display with menu-driven interface and quick-test operation; bilingual UI (Chinese/English); simultaneous display of 12-channel status, time, travel, velocity and waveforms with segment-average velocity analysis.
• Built-in DC supply (no external secondary power required) adjustable 20–270 V with short-circuit protection and audible alarm; redundant dual-circuit design for continued testing if one control circuit fails.
• Linear and rotary sensors with a multifunctional mounting joint for quick installation; linear sensors configurable in the field from 30 to 1000 mm without factory return.
• Storage for 100 test records with real-time clock; USB (U-disk) and RS232 interfaces for data export and PC connection; optional RS232 online operation and integrated high-speed thermal printer.
• Internal anti-interference design suitable for reliable operation in 500 kV substations.

Additional notes
Manufactured in China. The UHV-408 is intended for professional use in maintenance, commissioning and acceptance testing of high-voltage circuit breakers.

Specifications

• Model: UHV-408
• Time range: 1 ms–10000 ms; resolution 0.01 ms (≤999 ms)
• Velocity: 0.01–20.00 m/s (linear sensor); encoder 345° / 0.01°
• Travel: 0–50 mm (standard), optional 100–1000 mm; resolution 0.1 mm
• Current/resistance: max 30 A (0.01 A); resistance up to 1000 Ω (0.01 Ω)
• DC output: 20–270 V adjustable; DC220V ≤ 20 A (short time); power 4400 W
• External trigger: AC/DC 10–300 V, current ≤ 120 A
• Display: 7-inch color, sunlight-readable
• Storage: 100 test groups; real-time clock
• Dimensions: 360 × 260 × 170 mm
• Operating temperature: -20 °C to +50 °C; relative humidity ≤ 90%

Working principle

• The working principle of the high-voltage switch dynamic characteristic tester is based on electrical measurement and signal processing technology. It usually consists of a power supply, signal generator, sampling device, data processing unit, etc. During the testing process, the signal generator generates a series of electrical signals with different frequencies, amplitudes, and phases, which are then transmitted to the high-voltage switch through a sampling device. At the same time, the tester will record the electrical parameters of the high-voltage switch under different signal excitations, and transmit the data to the data processing unit for analysis and processing.

Application field

• The high-voltage switch dynamic characteristic tester has a wide range of applications in the field of power systems. It can be used for testing and evaluation of power substations, power transmission lines, and other power equipment. Specific applications include but are not limited to the following aspects:
• 1. Dynamic characteristic evaluation: By testing the dynamic characteristics of high-voltage switches under different working states, engineers can evaluate their fast switching ability, stability, and other important performance indicators, thereby ensuring the safe and stable operation of the power system.
• 2. Fault analysis: The high-voltage switch dynamic characteristic tester can help engineers analyze fault problems in the power system. By testing the response and dynamic characteristics of the switch under fault conditions, the cause of the fault can be determined and repaired and improved.
• 3. Equipment development: In the development process of high-voltage switches, dynamic characteristic testers play an important role. It can help engineers evaluate the performance and reliability of new high-voltage switches and make necessary improvements and optimizations.