Kehui T-907L Power Cable Fault Locator

Kehui T-907L Power Cable Fault Locator

The Kehui T-907L Power Cable Fault Locator is a portable and easy-to-use device designed to pre-locate various types of faults in low, medium, and high-voltage power cables. This fault locator is especially effective in identifying open circuits, short circuits, low-resistance, high-resistance, and flashover faults. The Kehui T-907L can operate in four different modes, including Time Domain Reflectometry (TDR), Secondary/Multiple Impulse Method (SIM/MIM), Decay Method, and Impulse Current Method (ICM). It is often used with a surge generator, such as the T-305E or T-305-16, to break down high-resistance faults for pre-location purposes.

How it Works

A power cable fault is unlikely to exhibit sufficiently low resistance to allow a TDR pulse to be reflected. The TDR injects an impulse onto the cable and compares the reflection from the cable before and during the arcing. The deviation of the signals (D) represents the distance to the fault position based on time and a known pulse propagation velocity. This technique allows the approximate part of the fault to be determined. The exact location will then be identified through pinpointing.

Features

• Portable and easy to use
• Suitable for low, medium, and high-voltage power cables
• Can pre-locate various types of faults
• Operates in four different modes: TDR, SIM/MIM, Decay, and ICM
• Effective when used with a surge generator
• Wireless display on a tablet computer for enhanced quality and safety
• Communication of data and photography of site conditions

Benefits of the Kehui T-907L

• Quick and accurate fault pre-location
• Versatile in identifying different types of faults
• Portable and easy to use, making it suitable for various applications
• Enhanced safety features, such as the emergency switch-off button
• Wireless display for improved quality and convenience
• Communication of data and photography of site conditions for better documentation and analysis

Kehui T-907L Power Cable Fault Locator Specifications:

• Measuring range: 64km
• Fault location methods: TDR, ICM, SIM/MIM and Decay
• Voltage of transmitting pulse: 30V
• Width of transmitting pulse: 40ns -7μs
• Voltage withstand: 400V AC (50/60Hz)
• Output impedance: 5-87Ω
• Sampling rate: 200MHz (5ns)
• Display: 8 inch, TFT, Touch screen and Colour LCD
• Charger: Input: 110V – 240V AC; Output 8.4V DC, Current 3A
• Weight: 4.5kg
• Dimensions: 330 x 305 x 152mm
• Operating temperature: -10o to +50oC
• Ingress protection: IP54: Splashproof and dust protected (when closed)
• Storage temperature: -20 to +50°C