Model 300A Integral Type
The CBT series is a self-contained, portable, rugged, reliable and compact cable tester, ideal for field use for underground buried or pipeline cable route tracing, depth detecting and fault locating. It consists of a time domain reflector (TDR) for flash testing under assistance from an optional arc and surge unit, a signal generator and receiver for route tracing and fault locating. Flash test section is used to approximately detect the position of fault point from one end of the cable, and also used for measuring cable length and electric wave propagation velocity in cable. Path signal generator is integrated and is able to generate 15 kHz sine wave signal, which is used for buried cable path tracing and depth measuring. Fault locating receiver is a standard accessory and is used for accurately locating position of fault point within the range of flash test detected coarse length range. |
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| Specifications︰ | Specifications
- Capable of testing every fault of all kinds of power cables of 35 KV lower voltage grade with copper or aluminum core, such as faults of open circuit, short circuit, splice, high resistance flash aspect, and high resistance leakage aspect.
- Electric wave propagation velocity of most common cables are preset for convenient testing, such as polyethylene cable, PVC cable, PILC cable, and XLPE cable.
- Single button operation for auto display of far end and fault distance in screen.
- Test distance: 15-8000 m range (maximum 16 km testable from bilateral ends).
- Four types of wave sampling frequencies:
40, 20, 10, and 5 MHz.
- Accuracy: within +/-0.2%FS, absolute error 15 m for cable 1 km less, 20 m for 1 km over.
- Differentiability: V/2f meter (V: electric wave propagation velocity in cable, f: sampling frequency), For example, V=160m/μs, 40MHz sampling frequency used for measuring, screen cursor moving one unit of dot will mean 160/(2x40)=2 meters.
- 5 inch dot matrix LCD for display of data and oscilloscope graphics.
- Measured length direct displayed after locating and moving the single line cursor to point.
- Menu help "Specialist System".
- Measured data and chart can be stored.
- Built-in printer for instant data recording.
- Sizes and weight: 455x315x195 mm, 9 kg
Integral Route Tracing Signal Generator
- Generate 15 kHz sine wave signal
- Output power not less than 30 watt
- Vibration type: intermittent
- Voltage 220 V AC +/- 10%, 50 Hz
- Working ambient: -10 to 45 deg. C
Fault Locating Receiver
- Sensibility: Signal generator of 50 ohm sending 300 Hz signal, point locator maintains non-distorted output of 2 V, input signal not above 10 micro-volts at signal to noise ratio better than 20:1
- Task type selection:
Point locating I: Signal received via 300 Hz filter amplifier
Point locating II: Signal received via direct amplifier
Route tracing: Route tracing and depth measuring
- Input impedance not less than 1.2 k. ohm
- Ear phone 2 x 2000 ohm
- Working voltage: 9 V +/- 10%
- Working current: locating 5 mA, tracing 7 mA
- Working ambient: -10 to 45 deg. C
- Sizes and weight: 455x300x180 mm, 8 kg |
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