VoltHot Technologies

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Non Contact Insulated Telescopic Probe High Voltage Phasing Tester

  • Identifies different three phase lines in electrical substation whether they are in-phase or out-of-phase.
  • The non contact insulated telescopic probe at voltage sensing position can be used on LT lines & HT lines up to 33kV and the detector is at handle position.
Technical specifications
Model name VoltHot_NCT_VD_VM_AV_Series
Functionalities In-phase & Out-of-phase by non contact (Proximity)
Voltage levels 100V to 20kV (P-G)
Functional modes

230V (P-G)

11kV (P-P)

33kV (P-P)

Self test

Applications Phasing of OH & URD high voltage lines 11kV to 33kV and low voltage lines

Electric Field Technology sensor system 

Voltage hold (Digital) Displayed voltage is hold for 2 minutes.
Test before touch functionality Self test diagnosis and Test before touch source
Detector response time < 1 second
Operating frequency 40Hz to 65Hz
Battery voltage 9V (Duracell)
Low battery indication < 6V
Auto shut off time 15 minutes after last operation.
Display indication Voltage magnitude display – APM and DPM respectively. In-phase & Out-of-phase by LED intermittent & Buzzer audible displays.

Insulated telescopic probe length 15 feet 

Overall diameter 110mm * length 100mm (Plastic housing for PCB).

(3 feet length insulated handle to be put on to detector)


(excluding hot stick)

Meter probe  - Approx. 2.5kg (including Insulated telescopic probe)

Reference probe - Approx. 1.8kg , (including Insulated telescopic probe)

Product standard IEC 61243-1
Operating temperature -100C to +600C
Storage temperature -200C to +600C
Humidity 25% RH to 96% RH
Water resistant Yes
Reliability (warranty) 3000 hours operations
Service support & calibration Yes

Caution: The limit mark indicates that the probe shall not touch the HV line beyond this in case for the high voltage level above 5kV for better safety of operator.


  • Prototype concept development test is under progress
  • Innovation disclosure filing for India Patent is under process
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