SWGB-20-8 surge wave generator with burning

SWGB-20-8 Surge Wave Generator with testing

Surge Wave Generators SWGB-series are intended for: 

- Locating distance to a cable fault using high voltage reflectometer ISKRA-4;

- Cable fault location using receiver P-806 or POISK-2016 receivers with acoustic method.

- Testing the insulation of cables and other devices and appliances by 20 kV DC high voltage;
- Burning the faulty insulation of cables with its subsequent after-burning;

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.

SWGB-20-8 parameters

Testing kV AC/DC                                                       1-20

Surge at 20 kV, Joules                                                1444 (2888 optional)

Surge capacity, µF                                                       8 (16 optional)

Number of stages                                                         4  

Operating modes:

- manual                                                                        single pulse

- automatic                                                                    surge rate 0,4 Hz

Burning, max                                                                 20 kV, 11A

Afterburning (conditioning faults), max                         500V, 22A    

Sheath fault locating, max                                            20 kV, 1444 J (2888 J optional)              

Mains supply,                                                                220 ± 10%, 50/60 Hz                        

Dimensions, mm                                                           1150x610x1000

Weight, kg                                                                     170

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