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High Voltage Surge Tester SWT 32 CPT(Thumper)

Surge Tester / Thumper

Cable Route Tracer

Cable Fault Pre Locator

Surge Receiver / Pin point Locator

High Pot tester

Sheath Fault Tester

Cable Identification System

Compact System

Trolley Mounted System

Van / Trailer Mounted System

Low Cost Van System

Cable Burn Down Equipment

Soft Discharge Rod

IP67 / IP54 Products



Occurrence of cable fault cannot be avoided due to many factors. Long outage of a cable from service results in heavy loss of revenue to the power distribution company, production loss to industries as well as unpleasant conditions to deal with. This requires an efficient equipment capable of locating the fault and test cable in minimum possible time and restoring the supply.
In power cable fault location the vast majority of pin-pointing and cable test are carried out using a surge wave tester.

It is a powerful equipment and offers 1000 Joules energy on 8, 16 and 32 kV ranges, and DC high voltage (High-Pot) test which allows its use on LT, Medium and HT networks effectively.

It is also used to pin-point the cable faults in power cables with the help of surge wave receiver and pre-locate cable fault distance with the help of suitable pre-locator unit in Impulse Current (ICM) mode. It can couple to an arc reflection filter to pre-locate faults in Secondary Impulse (SIM) Mode.
It is used to pin-point underground cable faults in acoustic mode with the help of suitable surge wave receiver and to perform DC high voltage di-electric test up to 32 kV in power transmission and distribution cable networks.
Two working mode Surge and DC high voltage (High-Pot) test
Pin-point location of cable faults in Low, Medium and High voltage cables by acoustic method
Perform Surge and DC high voltage test up to 32 kV
Selectable output voltage three ranges 8, 16, 32 kV
Full energy delivering capacity at each select range in surge mode
High energy of 1000 Joules. (Optional 2000 Joules)
Cyclical pulse repetition for precise pin-pointing of cable faults in Acoustic method
Fully protected operation with three safety interlocks
Emergency OFF facility
Pre-location of cable faults distance, connecting with suitable pre-locator in ICM and SIM mode
Easy to connect with arc reflection filter to pre-locate high resistance fault under SIM mode with suitable pre-locator
Automatic discharging facility of cable under test, in case of power failure or after switching off
Rugged construction and easy to carry on site
Working Principle
In surge mode ignites an arc or spark at the fault. This results in a transient, i.e. a spreading and repeatedly reflected traveling wave between the fault point and the connected end of HV Surge Tester. Inductive couplers record this transient wave with the help of a pre-locator unit and convert it into the fault distance.

Surges of high energy are applied to the fault at the set voltage and time interval for pin-pointing the exact spot on the cable length. These surges create noise and vibrations at the fault point. The intensity of the noise and vibrations get attenuated during their travel to the ground surface. A sensitive surge wave receiver with ground microphone carried out on the cable route at the pre-located area and pin-point the exact spot of the fault in minimum time.

The high voltage DC test up to 32 kV is carried out to check the di-electric strength or insulation of cable on DC test mode. The respective voltage and leakage current is indicated on the meters.
The HV Surge Tester used for fault pin-point location is basically a variable DC high voltage power supply, connected to a high voltage capacitor bank. The value of capacitance is usually selectable by parallel, series - parallel and series combination. This combination being linked with suitable high voltage taping to give the constant energy output on low voltage / high capacitance or high voltage / low capacitance in surge mode. In DC test mode the internal capacitor bank is isolated through a mode selection switch and DC high voltage is applied to the cable under test through a spark discharge device.
Working Mode
Surge and DC Test
Surge Mode
Output Voltage Ranges
0 - 8, 16, 32 kV
Energy Output
1000 Joules full Energy at each Range (Optional 2000 Joules)
Impulse Mode
Single and Auto
Auto Impulse Sequence
1.5, 3, 6 Second intervals
ON / OFF lamp indication, Analog meter for output voltage (kV)
Over temp Trip LED indication & Analog meter for mains input (V)
DC Test Mode
Output Voltage Ranges
32 kV
Output Current
10 mA
Analog meter for output voltage (kV) Indication,
Leakage current trip LED indication & Analog meter for output
leakage current (mA) Indication
Mains input circuit backer, Fast blow fuse in controlled supply,
Over current trip & Over temperature trip
Safety Protections
Variac Zero inter-lock, Output cable plug inter-lock, HV range Switch inter-lock, Mode select switch inter-lock & Emergency OFF switching
Power Supply
230V AC + 10%, 50 Hz Single phase
Operating Time
Surge Mode: Approx 8 hours continuous DC Test : 3 Minutes
Operating Temperature
0 °C C ~ 55 °C C
Storage Temperature
- 5 °C C ~ 60 °C C
635 (L) x 520 (W) x 670 (H) mm + Handle 55mm + Wheel 100mm
135 Kg Approx.
Standard Accessories
5 meter 10 sq mm single core screen output HV cable with heavy duty brass clamps.
5 meter yellow / green earthing cable
3 meter mains supply connecting cord.
Standard Warranty - One Year
Other models available
HV Surge Tester SWT 16CPT (4, 8, 16 kV - 500J, Optional 1000J) & DC Test 16kV - 10mA
HV Surge Tester SWT 32/40CPT (8, 16, 32 kV-1000J, Optional 2000J) & DC Test 40kV-10mA

| Surge Generator | High Voltage Surge Tester | High Voltage Cable test