Leave your message
-
Leon Zhang sales consultant
-
Email: zxl635973785@gmail.com
-
Phone/WhatsApp/Wechat: +86 13655813266
HF-LT-305 Insulator Voltage Distribution Tester
This Insulator Voltage Distribution Tester carries out live measurement on voltage distribution of each insulator in the string. It rapidly detects zero-value and deteriorated insulators, effectively eliminating flashover hazards and ensuring safe operation of overhead transmission lines.
Send your requirements, we will quote for you within 12 hours
General Application
Our self-developed Wireless Insulator Voltage Distribution Tester is a new type insulator testing instrument developed through extensive field tests according to practical operation scenarios and customer requirements.
It is used to test the distributed voltage of energized suspension insulators or perform laboratory tests on suspension insulators. It can effectively detect hidden internal defects of insulators, improve the reliability of power grid operation and boost work efficiency for field live-line testing crews.
It is used to test the distributed voltage of energized suspension insulators or perform laboratory tests on suspension insulators. It can effectively detect hidden internal defects of insulators, improve the reliability of power grid operation and boost work efficiency for field live-line testing crews.
HF-LT-305 adopts wireless communication. The communication distance between probe and handheld terminal can reach over 100 meters, enabling safe, fast and accurate measurement. Featuring strong anti-interference capability complying with EMC standards, it works stably under various electromagnetic interference environments.
Safety Precautions
★ Operate the product in compliance with specifications to ensure safe instrument operation.
★ Follow national power industry safety regulations for preventive tests of safety tools.
★ Provide professional training and assessment for staff working on or near high-voltage energized lines.
★ All operations on live equipment must be carried out with insulated operating sticks.
★ Follow national power industry safety regulations for preventive tests of safety tools.
★ Provide professional training and assessment for staff working on or near high-voltage energized lines.
★ All operations on live equipment must be carried out with insulated operating sticks.
Appendix: Safe Operating Length and Test Standard for Insulated Sticks (Excerpted from State Grid Power Safety Working Regulations)
Safe distance between personnel and live parts during live-line work
| Voltage Class | 10kV | 35kV | 66kV | 110kV | 220kV | 330kV | 500kV |
|---|---|---|---|---|---|---|---|
| Safe Distance | 0.4m | 0.6m | 0.7m | 1.0m | 1.8m | 2.2m | 3.4m |
Minimum effective insulation length of insulated sticks for live-line work
| Voltage Class | 10kV | 35kV | 66kV | 110kV | 220kV | 330kV | 500kV |
|---|---|---|---|---|---|---|---|
| Minimum Effective Insulation Length | 0.7m | 0.9m | 1.0m | 1.3m | 2.1m | 3.1m | 4.0m |
Note: Sectional inspection test standard for insulated tools: apply 75kV power frequency voltage for one minute per 300mm; pass criteria: no breakdown, flashover or overheating.
Applicable Standards
| No. | Standard Document Name |
|---|---|
| 1 | GB50150-2006 Standard for Hand-over Test of Electrical Equipment in Electrical Installation Engineering |
| 2 | GB/T311-1997 Insulation Coordination for High Voltage Transmission and Transformation Equipment |
| 3 | DL/T626-2005 Test Code for Deteriorated Disc Suspension Insulators |
| 4 | DL/T 596-2005 Preventive Test Code for Electric Power Equipment |
| 5 | DL/T 846-2004 General Technical Conditions Series for High Voltage Test Equipment |
| 6 | DL/T 848-2004 General Technical Conditions for Withstand Voltage Test Devices |
| 7 | GB1094.1~GB1094.6-96 Degrees of Protection Provided by Enclosures |
Product Information
Key Advantages
- Applicable operating voltage: 35 ~ 1000kV, compatible with all common voltage classes
- Measuring voltage range: 0 – 40kV (custom voltage range available)
- Measuring error: ≤±1%
- Sampling rate: 10 times per second
- Date & time adjustment: convenient for historical data review
- Backlight setting: always on, always off or adjustable from 0~999 minutes
- Auto power-off: adjustable range from 0~999 minutes
- Line-of-sight wireless transmission distance between handheld terminal and probe: ≤100m
- Multi-mode design for higher adaptability, safety and convenience
- Universal joint design, freely adjust measuring direction according to suspension position of insulator string
- Double shielding structure, strong anti-interference performance, conforming to EMC standards
- User-friendly human-machine interface, simple operation
Operation Guide
Switch on the probe; the green LED indicator flashes. Fix the universal joint at the bottom of the probe onto the telescopic insulated stick, extend the stick to proper length and adjust measuring angle. Place probe A and probe B directly onto metal fittings at both ends of the tested energized insulator. Real-time voltage values can be read, displayed and saved on the handheld terminal screen.
Power Supply
The handheld terminal automatically displays remaining battery power after power-on.
Replace batteries promptly when power is low.
Replace batteries promptly when power is low.
- Handheld terminal: open rear cover, install 2pcs AA 1.5V alkaline batteries
- Probe: open bottom cover, install 2pcs AAA 1.5V alkaline batteries
Technical Specifications
| Item | Parameter |
|---|---|
| Measuring Voltage Range | 0 – 40kV (custom range available) |
| Measuring Error | ±1% |
| Resolution | 0.01kV |
| Sampling Rate | 10 times/second |
| Operating Current | ≤120mA (handheld terminal); ≤40mA (probe) |
| Power Supply | Handheld terminal: 2×1.5V AA batteries Probe: 2×1.5V AAA batteries |
| Continuous Working Time | ≥12 hours |
| Wireless Transmission Distance (Line-of-sight) | ≥100m (fully charged) |
| Display | Positive LCD screen, clear visibility under sunlight |
| Operating Temperature | -35℃ ~ +60℃ |
| Storage Temperature | -40℃ ~ +65℃ |
| Relative Humidity | ≤90% RH, non-condensing |
FAQ for Insulator Voltage Distribution Tester
Q1: Can the tester work on energized transmission lines?
A1: Yes. It supports live-line measurement without power outage for suspension insulator strings.
Q2: What voltage levels is the instrument applicable to?
A2: Suitable for 35kV ~ 1000kV overhead transmission lines.
Q3: What is the wireless transmission distance between probe and handheld terminal?
A3: Up to 100 meters under line-of-sight condition with sufficient battery power.
Q4: What defects can be detected by this tester?
A4: It measures voltage distribution of each insulator to identify zero-value and deteriorated insulators.
Q5: What is the measuring accuracy?
A5: Measuring error ≤±1%, resolution up to 0.01kV.
Q6: Is the insulated operating stick included in standard package?
A6: The telescopic insulated stick is an optional accessory and not included in standard packing list.
Q7: Does the device feature anti-interference function?
A7: Adopting double shielding design, it complies with EMC standards and performs well in complex electromagnetic environments.
Q8: How long can the instrument work continuously?
A8: Continuous working time reaches more than 12 hours with new batteries.
Q9: Can I adjust the measuring angle freely?
A9: Equipped with universal joint, users can flexibly adjust the measuring direction according to insulator installation position.
Q10: Is the display visible under strong sunlight?
A10: It adopts positive LCD screen, which can be viewed clearly under sunlight.
Be the first to review “HF-LT-305 Insulator Voltage Distribution Tester”
Reviews
There are no reviews yet.