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Special Products

NTPL believes to supply not just the equipment but the complete turnkey and customized engineered solutions. Since last 35 years, we have developed over 120 innovative products that are reckoned worldwide. Some of the products are:

Automatic High Current Load Cycle Test Set

This Automatic High Current Load Cycle Test Set is divided into two major units such as Automatic AC High Voltage Test Set and Automatic Low Voltage High Current Injection Set.
This Automatic Control Unit enables the operator for injecting high current at pre-programmed set current into the cable. Users are able to select the number of ON-OFF Cycle, duration of OFF & ON Time and temperature for the complete monitoring of the system. This is maintained at pre-programmed level between the shielding and cable conductors.

  • Input: 415V, 1 Phase (between 2 phase of 3 phase system), 50Hz AC
  • Duty Cycle: Continuous
  • Output: 0 - 2000A @ Open Circuit Voltage 15V

The above Test Kit is available in multiple units with wheels for easy movement:

  • Current Loading Transformers
  • Microcontroller base Control & Measurement Unit
  • Regulator Unit


This microcontroller based Control Unit is designed for the Test Operation that includes test temperature, test cycle, programmable test current, test duration, automatic motorized voltage regulator, etc. In the Test Set-up, a) Automatic & b) Manual set ups are available.

  • Automatic Cycle: In this mode, the test sequence runs automatically when a push button is activated.
  • Manual Mode: In this mode, the increased current is controlled by the operator with a push button. The timing depends on the operator.

Current Limiting Relay, Fuse, Door Closed Interlock, Isolation Transformer, Zero Start Interlock, Regulator Over Run, Earth Fault Interlock, Over Temperature, Fast Tripping Relay, Emergency Push Button and Over Current.


  • Digital Ammeter for Primary Current of loading transformer ( Resolution : 0.1A )
  • Digital Ammeter for Secondary Current of loading transformer ( Range 0-2000A )
  • Digital Voltmeter for Mains Input Voltage ( Resolution : 1V )
  • Digital Voltmeter for Output Voltage of Regulator ( Resolution : 1V )


Digital LCD for displaying digital timer, temperature, ammeter and test status


Best oil cooled motorized regulator is available


Loading Transformer having primary terminals are available for generation of current using cable that is passed through the centre of the loading transformer. Current Transformers are designed for measurement & protection.

  • Accessories
  • Input Power Supply cable, 3m.
  • Earthing cable, 3m.
  • Interconnecting cable (Power and Signal ), 3m.

All cables are designed with apt connectors at both ends.


117, Mishrapara Road, Rathtala, P.O. Rajpur,
Kolkata - 700 149, West Bengal, India.

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