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Megger System R-30 Cable Fault Test Van

Megger SebaKMT System R-30 is the largest Most Powerful Cable Test Van System within the SebaKMT product range.  All functions and voltage ranges are full integrated and three phased. Recently extended and improved, this already powerful system's capabilities are increased. DC test voltage levels, including the well-known Decay travelling wave prelocation methods are available up to 110 kV in the standard version (400 kV optional), thus keeping and extending the world-wide standards set by system R 30.

The widely approved and well known Arc Reflection method up to 50 kV gives this system the capacity to locate faults in cables above the 30 kV range. The standard high voltage supply provides test voltage levels up to 6 x Uo.  

A PLC operated central control Unit monitors the safety and all vital functions of the system. The integrated safety system concept and the separation transformer for defined potentials, guarantees the high Seba KMT safety standards for men and equipment.


The three phased connection offers a comfortable and safe switching of the phases by the internal SF6 high voltage switch

The Control Unit is an integrated central operator inter-face for all operational modes and provides the monitoring of the system and the integrated safety facilities. It enables an easy and quick operation of the system (many local languages available), prevents operational errors and reduces the fault location time considerably.

Equipped with the new integrated Teleflex M- our state-of-the-art reflectometer, with high dynamic range, sampling frequency up to 100 MHz and selectable pulse normal">high voltage applications.

The modular concept offers optimized solutions suited to individual requirements. With a wide range of different possibilities, this system leaves almost no wishes unfulfilled.

The high surge power of 2500 Joules is the base for an efficient and fast localization of cable faults.

An effective and safe testing of PE, XPLE and Paper Oil Insulated cables is provided for by use of the pat-ended Seba KMT VLF 0.1Hz Cosine Square Wave method.  

The very powerful high voltage source in high frequency converter technology provides the system with the required voltage level of 110 kV for testing, and with a standard current of up to 300 mA to handle high loads.The system provides all known and proven SebaKMT high voltage prelocation methods as:

  • ARM Arc Reflection Method
  • Decay method  
  • Impulse current decoupling ICE

In combination with according high voltage and power features. 

The extensive and approved safety concept of Seba KMT fulfils the highest safety standards by extensive use of safety interlocks, indications at the Control Unit, detection of errors, as well as use of a separation transformer and thus generates the maximum protection for men and equipment. 




Product Specification
Methods Standard Options
Insulation Testing
  Megger BM 222 or similar up to 1000 V through external connector  
DC- Testing 0 - 110kV, IN 5 mA at 110 kV ,
Imax 290 mA
Automatic shut off at breakdown
0 - 400 kV IN 3.5 mA at 400 kV
Imax 290mA
External HV Extension controlled via the system
VLF-Testing   VLF 0-52 kV or 0 - 70 kV 0.1Hz Cosin - rectangular Wave, maximum capacity 5 µF.
Impulse Reflection Measurement Mode : Direct, Diffrence, Comparison, Average, Intermittent Fault Location IFL, simultaneous display of six phases or memory contects in selectable colours. Automatic adjusment of gain, Range and pluse dt, auto end detection. Data Base Software Winkis
Sampling Rate 1 MHz to 100 MHz
Pulse dt 0.05/ 0.1 /0.2/ 0.5 /1 / 2/ 5 µs
Range 80 m… 160km at v/2 = 80 m/ µs
Pluse amplitude max. 60 V / 1,5 kV for ARM and Decay Plus HV methods
V/2 10 … 150 m/µs, ft or NVP
Dynamic range 84 dB
Compensation 25 Ohms … 1.6 kOhms
Accuracy 0.2 % of measuring range
Resolution 0.1 m
Display 1024 × 768 15" VCA Colour TFT
Interface USB, Printer and data interface
Storage and protocoling Automatic storage of all measurements protocol printout, also as PDF file oe for tansfer to thr winkis software
ARM 3 /6 / 12 / 25 / 50 kV  
Decay 0 - 110 kV, travellingwave location 0 -400 kV, travelling wave location
Impulse current 3 / 6 /12 /25 /50 kV,surge impulse decoupling  
Burning 290 mA, 0-110 kv (rated output current) 25 A DC, 0 - 15 kV,
Acoustical Distance Method with Surge Unit 0 - 3/ 6/ / 12 kV 1,000 J in each range

25 / 50 kV 2500 J in each range
Adjustable surge sequence
3 - 30 s, DC , Single shot
0 - 3 /6 /12 / kV 2,000 J in each range
Audio frequency FLG 200
Output power : 200 W
Frequencies : 480 Hz, 1 .06 kHz, 9.8 kHz Impedance : 0,5 Ohm to 2 kOhm with
automatic and manual impendance matching
Other frequencies on request
DC-Sheath Fault pinpointing with step-voltage
AC-Sheath Fault pinpointing with Pear-son Method
FLG 200, Frequencies : 480 Hz, 1.09 kHz, 9.8 kHz 0 - 15 kV, Imax 300mA, Pulse-pause ratio 1:2
with burn unit T 22/13
Earth fault locator for exact pinpointing
Digiloc P for exact pinpointing
HV- Connection 3 × 1 phase with 50 m 110 kV HV cable on each cable drum 3 × 1 phase with 50 m 110 kV HV cable on moter driven cable drum 3 × 1 phase with 50 m 110 kV HV cable drum
LV-Connection 50m Mains cable 2 × 4 mm² on slipring cable drum
50 m earth 16 mm² cable drum 15 m FU cable
Teleflex-direct connection   Teleflex Cable Drum 50 m, 3 phased coax-ial cable 50 Ω
Operation conditions
Operation Temperatrue HV-Part : '-25 áµ’C …+55 áµ’C Teleflex M: '+ 0 áµ’C … + 45 áµ’C Teleflex M: '-25 áµ’C … +45 áµ’C Extended Tempreature Range
Storage Temperature -25 áµ’C … + 70 áµ’C -40 áµ’C … + 70 áµ’C
Weight 1050 kg depending on selected on selected option and outfit  
Mains supply
Mains voltage 230 V , 50 Hz (16 A connection) 120 V, 60Hz (other voltage on request)
Power consumption 3 kVA maximum input via separatin transformer 5 kVA for extended supply (Air condition, heater tools etc.) Battery powered with 4,5 kVA battery power supply. Operating time > 4 Hours Generator 5,5 kVA or Travepower 3,5 kVA Wireless remote switch off via Mobile phone (GSM)


  • Fault Prelocation up to 400 kV.  
  • Testing up to 400 kV.
  •  VLF with 70 kV                                                                        
  •  ARM up to 50 kV


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