SWG/SWGB Surge wave generator 

for cable fault location

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 SPARK-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.

Parameter                                                                                           Value
Model                                                                      SWGB-20-8    SWGB-20-7     SWG-20       SWG-22      SWG-5
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

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