The ES1010 Wireless High & Low Voltage Ratio Tester is a high-efficiency clamp-type ammeter and CT analyzer, designed to measure the transformation ratio, current, phase, and polarity between high-voltage and low-voltage current transformer circuits without interrupting power. It includes a high-voltage detector, low-voltage current clamp, and host unit, all communicating wirelessly for hassle-free testing up to 30 meters. Perfect for substations, power plants, and field electrical work, this device ensures quick, non-invasive testing for CT performance validation and transformer maintenance.  

Specifications:

Component	High Voltage Detector	Host (Current Clamp)
Measurement Range	0.0mA–1200A	0.0mA–20A
Resolution	0.1mA	0.1mA
Jaw Size	φ50mm	φ7.5mm
Accuracy	±2% ±5dgt	±0.5% ±5dgt

• Display: 128×64 LCD with blue backlight (62mm × 44mm)
• Sampling Rate: 2 samples/sec
• Ratio Display Options:
  • Measured primary/secondary current
  • Secondary 5A ratio reference
  • 10kV transformer reference (e.g., 10kV/380V)
• Wireless Transmission Distance: 30 meters
• Data Storage: 500 groups
• Indicators: FULL, HOLD, OL (overflow), NO SIGNAL, low battery
• Power Supply:
  • High-voltage detector: DC 6V (4 × AAA)
  • Host: DC 7.5V (5 × LR6 AA)
• Insulation Rod: 5-meter segmented pole
• Dimensions:
  • Detector: 87 × 37 × 262 mm
  • Host: 100 × 35 × 204 mm
  • Clamp: 42 × 20 × 137 mm
• Weight: Total 3.1 kg (incl. rod and packaging)
• Operating Temp: -10°C to 40°C
• Storage Temp: -10°C to 60°C
• Humidity: ≤75% @ 0–31°C, ≤50% @ 31–40°C
• Safety Standards: IEC1010-1, IEC1010-2-032, CAT III (600V), IEC61326 (EMC), Pollution Degree 2

Applications:

• Field testing of CT ratio and polarity
• Online CT error measurement without service interruption
• High-voltage current detection in substations
• Utility inspections and equipment diagnostics

 Packing List:

• 1 × High Voltage Detector
• 1 × Host Unit
• 1 × Current Clamp
• 1 × Insulated Rod (5 m)
• 1 × USB Data Cable
• Batteries (4 × AAA, 5 × AA)
• 1 × Carry Case
• 1 × User Manual & Warranty

About Manufacturer:

Fuzrr Technology (Guangzhou Zhengneng Electronic Technology Co., Ltd.) is a professional manufacturer engaged in R&D, production, and sales. The factory is located in Guangzhou, part of China’s International Greater Bay Area Economic Circle near Hong Kong, Macau, and Shenzhen. They manufacture a wide range of electrical test instruments including: utility locators, cable identifiers, multimeters, insulation testers, grounding resistance testers, power quality monitors, megohmmeters, battery testers, clamp power meters, and high voltage clamp meters. With over 15 years of experience, Fuzrr exports to more than 80 countries. Their 100+ staff operate advanced automated production lines, and the company offers full OEM/ODM services for global brand agents and bulk orders.