Description
The ETL-10 is a complex solution for preliminary and accurate location of faults in power cables, as well as their subsequent high voltage tests.
The ETL-10 is mounted in the van and structurally consists of two compartments: the operator’s compartment and the high-voltage compartment. Operator’s compartment is separated from the high-voltage compartment with a control rack, on which the controls of the electric line operation (switches, regulators, etc.) and indication units are placed, to control the test parameter values. The rack is also equipped with sliding drawers for storage of additional equipment or tools.
At the request of the Customer, the ETL-10 can be supplemented with additional equipment in accordance with the requirements.
TECHNICAL SPECIFICATIONS:
| AC and DC voltage testing (BVI-60/50-M5 high-voltage test unit) |
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| Maximum DC voltage | 60 kV | |
| Maximum AC voltage | 50 kV | |
| Maximum DC current | 60 mA | |
| Maximum AC current | 70 mA | |
| Burning and afterburning of cable insulation (BPR-25/8 unit) |
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| Maximum output voltage in idle mode | 20 kV | |
| Minimum output voltage in idle mode | 1 kV | |
| Number of burn-in steps (5, 10, 15 and 20 kV) | 4 pcs. | |
| Maximum current in short circuit mode (5 kV) | 2 А | |
| Current consumption (limited by line choke) | 63 А | |
| Power consumption | 12 kVA | |
| Power delivered to the load in matched mode | 3.5 kW | |
| Maximum afterburning voltage in idle mode (“1 kV”) | 1500 V | |
| Maximum afterburning current in short circuit mode (“0,5 kV”) | 18 А | |
| Pre-location of the distance of the cable fault (ISKRA-4 reflectometer) |
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| Working mode | TDR (low-voltage impuls method), ICE (high-voltage oscillatory discharge method with current coupling), Decay (high-voltage oscillating discharge method with voltage coupling), ARC (high-voltage pulsed method). |
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| Range of the measured distance to the fault location | 3 – 15300 m | |
| Resolution | 0.5 m | |
| Parameters of high-voltage probing pulses on 30 Ohm load: – amplitude – edge duration – pulse duration |
3 – 25 kV 0.15 ms 2 ms |
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| Parameters of low-voltage probing pulses on 30 Ohm load: – amplitude – edge duration – pulse duration |
5 V 0.02 ms 0.05 – 10 ms |
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| Maximum working voltage of the pulse voltage probe | 60 kV | |
| Precise pinpointing of cable faults | ||
| Induction method (GZCH-2500 generator of audio frequency, P-806 Receiver) |
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| Output power in matched mode | 2500 W | |
| Maximum output idle voltage | 300 V | |
| Maximum output current | 80 А | |
| Generation frequency | 1024/2048 Hz | |
| Modulation frequency | 1.5 – 3 Hz | |
| Quantity of steps of matching with the load | 12 | |
| Load resistance range | 0.5 – 150 Ohm | |
| Acoustic method (GAUV-20-16 Generator of acoustic surge waves, P-806 Receiver) |
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| Capacity of accumulator | 16 μF | |
| Maximum output voltage | 20 kV | |
| Maximum energy of pulse discharge | 3200 J | |
| Operation modes | manual / automatic | |
| P-806 Receiver | ||
| Frequency range | 1024 ± 2 / 2048 ± 4 Hz | |
| Magnetic field sensitivity at 6 dB | 50 mA | |
| Mode of operation: | Bandwidth -3 dB | Bandwidth -20 dB |
| – «1024 Hz» – «2048 Hz» – ACUST |
9+1 Hz 10+2 Hz 100 – 12000 |
10+2 Hz 12+4 Hz – |
| Load | 16 – 100 Ohm (headphones) | |
