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High Voltage Testing Equipment

This High Voltage Testing Equipment is versatile equipment designed to ease the work and provide accurate measurement results. This system is user-friendly in nature as it is designed with intelligent software to provide maximum precision in results. It minimizes setup and breakdown time owing to its minimal leads available for managing. This ensures speedy movement from one test to another and enhances safety with reduced ladder climbs. With portable and compact design, it is easy to use and transport from one place to another.

High Voltage Measuring System

Since our inception in 1975, we have been engaged in manufacturing and exporting high performing High Voltage Measuring System that is widely used in various industries for measuring the voltage in diverse electrical applications. Manufactured using optimum quality components under the supervision of our adroit professionals, this voltage measuring system is tested by our quality analysts on several parameters. Offered High Voltage Measuring System is available in different specifications to meet the diverse needs of the clients and can also be availed at affordable prices.

Features:

  • Durability
  • Temperature resistance
  • Hassle-free performance
  • Accurate measurement

The System includes:

 

  • Resistive Potential Divider
  • Capacitive Potential Divider
  • Dissipative Capacitive Potential Divider
  • Sphere Gap Assembly
  • Electro-magnetic Potential Transformer

Range  :  20 KV to 500 KV AC & 750 KV DC / Impulse

All the above equipment are supplied with Read-Out System.

DC High Voltage Test Set

We are an eminent name in the industry, engaged in manufacturing, exporting and supplying high quality DC High Voltage Test Set. This test set is suitable for testing electrical insulation of condensers, transformers, motors, insulators, cables, etc. It is capable of giving continuously variable DC HIGH VOLTAGE from zero to maximum rated output voltage. This test set is manufactured at our well-equipped manufacturing unit under the observation of our experts using premium quality components. Offered DC High Voltage Test Set can be purchased from us at pocket-friendly prices.

Features:

  • Robustness
  • Durable finish standards
  • User-friendly design
  • Low maintenance

Specifications:

Input:

Generally, 230 Volts, 50Hz, single phase AC. However, we also manufacture DC H.V. sets workable on other input voltage at extra cost.

Output:

Continuously variable from zero to maximum rated output voltage.

Capacity:

Spread over a wide range of sets from 1 KV to 300KV with current capacity upto 100mA. Sets of higher current capacity can also be manufactured.

Duty cycle:

Intermittent i.e., 5 minutes ON, 10 minutes OFF. However, test sets of continuous or other duty cycles can also be manufactured at extra cost.

Metering:

Output DC high voltage measured by HV resistor chain along with micro-ammeter scaled in kV. Milli-ammeter to measure the leakage current. Digital meters may be provided at extra cost.

Protection:

Overload & short circuit provided. Zero start interlocking along with Over voltage alarm & indication are provided.

Mode of Operation:

Generally, sets are manually operated. Motorization facility can be available at extra cost.

Units:

Generally DC high voltage test sets are available in one unit upto 35KV and sets of higher output voltage are commonly manufactured in two units i.e. the control unit & Transformer" Rectifier unit. This Transformer" Rectifier unit are made cascaded type above 80KV. However, NTPL always welcome customers' choice regarding the no. of units.

Discharge Rod:

A discharge rod is provided with the set. DC high voltage is generally obtained by simple rectification of AC high voltage or by multiplication of relatively low AC high voltage by proper multiplier circuits as is found suitable for a particular DC HV test set. HV transformers of the Test Sets are Cast Resin types.

While sending enquiry for quotation or order please specify the following :

  • Input voltage and frequencys
  • Maximum output voltage
  • Capacity
  • Duty Cycle
  • Mode of operation: Manual/Motor operated/ Fully automatic
  • Any other details you find important to be specified 


Combined High Voltage Test Set

We are the topnotch manufacturer and supplier of Combined High Voltage Test Set that is extensively used to measure AC and DC voltage of different electrical devices. It is manufactured as per international quality standards under the supervision of our engineers using high quality components. To ensure its flawlessness at client's end, it is tested by our quality controllers on various parameters. It is available in several specifications to meet the desired requirements of the clients. Offered Combined High Voltage Test Set can be purchased from us at cost-effective prices.

Features:

  • Robustness
  • Durability
  • Precise result
  • Superior performance

Further Details:

Input: 230 volts, 50 Hz., single phase, AC. However, sets with other input voltage & frequency are also manufactured if mentioned by the customer.

Output(s):         

  • AC Mode
    • Continuously variable from 0 to maximum rated output voltage.
    • Spread over a wide range from several VA to hundreds of KVA.  

Tripping current: 25%, 50% & 100% of the rated current capacity. 

DC Mode: 

  • Continuously variable from 0 to maximum rated output voltage.
  • This DC HV output can be suitably used in two modes.                  
    • Cable fault-burning mode.
    • cable insulation testing mode.           

Only one output mode will be available at a time by brief manual change over.

Duty cycle: Intermittent i.e., 5 minutes ON, 10 minutes OFF. However, test sets of continuous or other duty cycles can also be manufactured at extra cost.

Series :

  • ADHVXXYYU; XX denotes Manual operation of the set (MN) or Motor operation of the set (MT).
  • YY denotes type of transformer i.e. cast resin type (DR) or oil cooled type (OC).
  • U denotes no. of units.
  • This Series will be repeated for both AC & DC mode as Series1 & Series 2

Type1:

X1X1X1KY1Y1Y1 m; X1X1X1 denotes the maximum rated AC output voltage.

Y1Y1Y1 denotesthe current capacity in mA.

X1X1X1KY1Y1Y1 A; Y1Y1Y1 denotesthe current capacity in A.

Type2:

X2X2X2KY2Y2Y2 m; X2X2X2 denotes the maximum rated DC output voltage.

Y2Y2Y2 denotesthe current capacity in mA.

Protection: Overload & short circuit provided.Zero start interlocking along with Overvoltage alarm & indication are provided.

Metering:

  • AC mode : Voltmeter, Rectifier type milliammeter.
  • DC mode : Micro-ammeter scaled and connected to the HV resistor chain for direct DC HV measurement and to measure DC leakage / burning current 

 

H.V. Transformer: The Transformer will be indoor pattern cast resin trolley mounted type with one end of the HV winding earthen through low impedance circuit element.

Rectifier Unit: This unit consists of diode chain, filter capacitors and resistor chain. The whole DC circuit element will be coupled to the transformer & control by simple & short manual operation.

Discharge Rod: A discharge rod is provided with the set. 

High Voltage Impulse Generator

To live up to the expectations of valuable clients, we are engaged in offering high performing High Voltage Impulse Generator that is used for generating voltage for various equipment. This voltage impulse generator is manufactured at our hi-tech manufacturing unit under the guidance of seasoned engineers using quality-approved components. It is made available in different specifications to satisfy the exact needs of the clients. Our clients can avail this High Voltage Impulse Generator from us at pocket-friendly price.

Features:

  • Robust construction
  • Durability
  • Excellent performance
  • Low maintenance

Specifications:

  • Max. O/P Voltage : 0 - 140 / 200 / 280 / 300 / 420 KV
  • Capacity : 400 J - 18 KJ
  • Nature of Impulse Wave : 1.2/50 uSec

This Set mainly consists of:

  • Capacitor Charging Unit
  • Peak Voltmeter
  • Charging Resistors
  • Generator Capacitors
  • Triggering System
  • Wave Shaping elements, Series resistance & parallel resistance
  • Potential Divider, Integrated Impulse Generator Control Panel
  • Output termination for measurement of Impulse Voltage by CRO

AC High Voltage Test Sets

We are well-reckoned name in the industry in manufacturing and exporting precisely engineered AC High Voltage Test Sets. These high voltage testing sets are suitable for Power frequency AC high voltage test on transformers, motors, insulators, cables etc. Further, these testing sets are capable of giving continuously variable AC HIGH VOLTAGE from zero to maximum rated output voltage. Our team of competent professionals manufactures these testing sets as per international quality standards using supreme quality components. We assure our clients the on-time delivery of these AC High Voltage Test Sets at rock-bottom prices.

Features:

  • Robust construction
  • Smooth operation
  • Long functional life
  • High performance

Specifications:

Input

Generally, 230 Volts, 50Hz, single phase AC, upto 10KVA & 400/415V, two phase out of three phases for sets beyond 10KVA.However, we also manufacture AC H.V. sets workable on other input voltage at extra cost.

Output

Continuously variable from zero to maximum rated output voltage

Capacity

Spread over a wide range of sets from 2.5KV to 300KV AC having capacities from several VA to hundreds of KVA.

Duty cycle

Intermittent i.e., 5 minutes ON, 10 minutes OFF. However, test sets of continuous or other duty cycles can also be manufactured at extra cost.

Metering

Analog voltmeter & milliammeter/ammeter. Digital meters may be provided at extra cost.

Protection

Tripping mechanism for protecting the H.V. transformer against over loading. The tripping mechanism can be adjusted at 25, 50 & 100% of the rated current by a rotary switch. Below 100mA & above 20mA two adjustable tripping ranges are at 50% &100%, while for sets of 20mA capacity or below only 100% is adjustable [If required by the users tripping current can be made adjustable at other values, at extra cost]. Apart from tripping mechanism, Zero start interlocking along with Overvoltage alarm & indication are provided.

Mode of operation

The Sets are generally, motor operated beyond 20KVA & 50KV. Motorisation facility can be available below the specified value at extra cost.

H.V Transformer

H.V.Transformer used for the testing purpose can be oil cooled indoor type or Resin cast dry type as found suitable or particularly required by the customer. The H.V. winding of the high voltage testing transformers is of graded insulation, one end of which is grounded through milliammeter and tripping device while the other end remains in floating condition as H.V. terminal. These testing transformers are specially designed to withstand frequent intermittent spark over or momentary short circuit conditions under which such testing transformers are supposed to operate.

Discharge Rod

For device under tests having large capacitance, discharge rod may be provided at an extra cost.

While sending enquiry for quotation or order please specify the following,

  • Input voltage and frequency.
  • Maximum output voltage.
  • Capacity.
  • Type of transformer Oil cooled or Cast Resin
  • Duty Cycle.
  • Mode of operation: Manual/Motor operated/ Fully automatic.
  • Any other details you find important to be specified
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Works:

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