Surge Wave Generators SWG/SWGB
Surge Wave Generator SWG-series and surge wave generator with testing and burning SWGB-series are intended for:
- Locating distance to a cable fault using high voltage reflectometer ISKRA-4 (SWG/SWGB);
- Cable fault location using receiver P-806 or POISK-2016 receivers with acoustic method (SWG/SWGB);
- Testing the insulation of cables and other devices and appliances by DC and AC (50 Hz) high voltage (SWGB);
- Burning the faulty insulation of cables with its subsequent after-burning (SWGB);
According to statistics, the most common faults in the three-phase underground power cable occur such as "single-phase breakdown" (breakdown of one of the cores to the cable sheath). Breakdown of this type can be "creeping" (intermittent) (ie recovering insulation up to a certain voltage, which is lower than the operating voltage of the cable), and with the "insulation leakage" (insulation resistance decreases up to tens kilohms - hundreds ohms).
Quite frequent cases of breakdown of the two cores one to another and to cable sheath (line-to-line short circuit).
For single-phase breakdowns developers recommend the acoustic method of finding and identifying the fault location.
For the line-to-line short circuit it can be recommended induction method using GZCH-2500 with receiver P-806 or POISK-2016 fault location for "loop" with preliminary insulation burning.
Note that in some cases you can use the receiver P-806 or POISK-2016 to determine the cable route using a burning signal of SWGB models.
Surge voltage, kV, max 20 20 20 20 5
Surge voltage ranges, kV 5-10-15-20 5-10-15-20 5-10-15-20 5-10-15-20 5
Discharge pulse energy, Joules, max 1444 (2888*) 1543 (3087*) 1444 (2888*) 1543(3087*) 1625 (3250*)
Storage capacity, μF 8 (16*) 7 (14*) 8 (16*) 7 (14*) 130 (260*)
Operating modes Manual / Automatic
Frequency of pulses in automatic mode, Hz 0.25
Testing cable insulation AC/DC, kV 1-20 1-20 - - -
Number of burning stages 4 4 - - -
Burning current in short-circuit mode, A, max 8 8 - - -
After-burning voltage in the idling mode, V, max 500 500 - - -
Power consumption of burning unit, kVA, max., 12 12 - - -
Load power, kW, min., 3.5 3.5 - - -
Operating mode of the burning unit continuous continuous - - -
Equipment weight, kg, max 170 170 100 110 120