10kv Wireless High Voltage Voice Phase Verification Instrument 35kv/110kv/220kv Digital Display Phase Verifier Remote Phase Verification Instrument
The "10kv Wireless High Voltage Voice Phase Verification Instrument 35kv/110kv/220kv Digital Display Phase Verifier Remote Phase Verification Instrument" you mentioned is a key live-line testing tool used in power systems for phase verification, phase sequence verification, and voltage detection on high-voltage lines. This type of equipment uses wireless transmission technology to replace traditional wired connections, effectively avoiding short-circuit risks, and is equipped with voice broadcast and digital display functions, making operation safer and more intuitive.
The following is a guide to the core functions, technical parameters, and selection and usage of this type of instrument:
I. Core Functions and Features
Multi-voltage level compatibility: Mainstream equipment typically covers a wide voltage range of 10V to 500kV, and can automatically identify and adapt to different voltage levels such as 10kV, 35kV, 110kV, and 220kV.
Wireless and remote phase verification:
Short-range phase verification: Using radio transmission technology, the unobstructed transmission distance between the transmitter and the receiver host is usually 100 to 200 meters.
Remote phase verification: Using GPS/Beidou satellite high-precision timing technology, it can achieve phase comparison between different substations or lines hundreds of kilometers apart (e.g., 300 meters to 800 kilometers).
Intelligent voice and digital display: Equipped with a true color LCD screen, displaying phase difference, frequency, phase sequence, and vector diagram on the same screen; built-in real-person voice broadcast (e.g., "same phase", "different phase", "X/Y signal normal"), allowing accurate results even in environments with long distances or poor visibility.
Contact and non-contact measurement: Supports contact phase verification (suitable for bare conductors of 35kV and below) and non-contact phase verification (placing the probe hook near the insulation to sense the electric field, suitable for high-voltage lines above 35kV), without direct contact with live parts.
II. Key Technical Indicators
Phase verification voltage: AC 10V to 500kV (some models can be extended to 10V to 550kV).
Phase accuracy: Same-phase error is usually ≤±3° to ±10°, different-phase error is ≤±15°.
Frequency test: Range 45.0Hz to 65.0Hz, accuracy ±0.1Hz.
Phase identification standard: Generally, a phase difference ≤30° (or ±20°) is determined as same phase, and a phase difference >30° (such as 100° to 140°) is determined as different phase.
Power supply: The host and detector generally use built-in rechargeable lithium batteries, and low-power design ensures long field operation endurance.
Environmental adaptability: Operating temperature is generally -35°C to +50°C, humidity requirement ≤95%RH.
III. Selection and Safety Precautions
Voltage level matching: The rated voltage of the phase verification instrument must be equal to or higher than the maximum operating voltage of the actual system. For example, a 10kV system can use a 10kV or 35kV phase verification instrument, but equipment with a voltage lower than the system voltage must never be used.
Insulating rod safety distance: The length of the insulating rod must strictly comply with the voltage level requirements. For example, for 10kV lines, the safety distance between personnel and live parts is 0.4m, and the effective insulating length of the insulating rod must reach 0.7m; for 220kV lines, the safety distance is 1.8m, and the effective insulating length must be 2.1m.
Compliance and certification: When selecting, it is necessary to confirm that the product complies with national power industry standards (such as DL/T971-2005/2017), has CE, CMA, or CNAS certifications, and is regularly subjected to preventive withstand voltage tests.
Operating specifications:
It is strictly prohibited to perform phase verification work in thunderstorm weather or high humidity environments.
During operation, insulating gloves must be worn, and the "one person operation, one person supervision" system must be strictly implemented.
Before use, self-inspection must be carried out to confirm that the equipment has sufficient power and normal communication, and the instrument must be tested on the same power grid to ensure it is in good condition before formal operation.
