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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.

AC High Voltage Test Set (Series Resonance Type)

The major advantage of this Test Set-up is Minimum Active Power requirement, say for a 100KV/15A , 50KV/30A Test Set shown in the Picture the Reactive Power is 1500KVA max. in both ranges. But input AC Power requirement is less than 70KWW Because of Resonance phenomenon the Sine Wave output is Harmonics free.

Major Burning of Test objects can be avoided as the voltage falls sharply whenever there is a break down due to de-tuning of the Resonance circuit.

This Test Setup is mostly PLC based system with adequate Automation and data acquisition system. NTPL is also in the process of developing variable frequency type Series Resonance Set-up.

100KV100mA AC HV Test set

The above test kit will be in 2 units i.e.

 1. Control & Measurement Unit.

 2. AC HV Transformer Unit. Power Mains ON - OFF operation is done by means of an ON - OFF switch along with 'MAINS ON' lamp indication & Fuse.

All the above units will be provided with wheels for easy movement.

Control & Measurement Unit :

  Power Mains ON - OFF operation is done by means of ON-OFF switch & Fuse/ MCB.

  Control ON-OFF switch along with fuse protection

  'HT ON' push button & 'EMERGENCY OFF' mushroom type push button

  Continuously variable autotransformer of suitable capacity to increase/decrease the output test voltage up to the required voltage level.

  INCREASE/DECREASE circuit to control motor operated Voltage Regulator. When high voltage circuit is energised the regulator will rotate to 

  increase the output voltage when 'INCREASE' push is pressed ON or decrease the out put voltage when 'DECREASE' push is pressed ON. 

  LAMP INDICATIONS: 'MAINS ON, 'HT ON', 'CONTROL ON','REG. NOT AT ZERO', 'OVERVOLTAGE'

Metering :

   Digital Voltmeter generally connected to the tertiary winding of HV Transformer and scaled in KV. Resolution: 0.1KV. If Capacitive Potential 

  Divider is used then the Digital Voltmeter will be connected to the low voltage arm of the HV Capacitive Potential Divider. Resolution: 0.1KV.

  Digital milliammeter along with 'PRESS TO READ mA' push button to read the leakage current. Resolution : 0.1mA

  A 'TIMER' will be provided to count down the duration of applied HV. After completion of the test time the regulator will automatically decrease 

  to zero position. 'RESET' feature of the 'TIMER' will be provided.

Interlock :

ï Zero start interlocking will be provided to ensure that the HV circuit cannot be energised unless the regulator is initially kept or brought back to 

  zero position.

ï Minimum & maximum position interlock will be provided so that limit switch will automatically disconnect 'INCREASE/DECREASE' circuit of motor 

  connection at maximum and minimum position respectively.

ï Enclosure interlocking will be provided i.e. high voltage circuit cannot be energised unless the door of the enclosure is closed. However, this inter

  lock can be by-passed by shorting corresponding terminals.

Protection :

ï Besides main switch & fuse in the input side/MCB, one CT and contactor provides a snap acting automatic tripping of HV circuit in case of over load.

ï The tripping mechanism can be adjusted at different values as mentioned above. After tripping, High Voltage will be switched OFF

ï In case the voltage exceeds the maximum rated value a lamp & buzzer will indicate over voltage. and the increase mode circuit will not function 

  further, even if 'PRESS TO INCREASE' push is pressed.

HV Transformer :

  HV Transformer used in the test set will be oil natural cooled indoor type and of suitable capacity.

  The HV winding of the Transformer is of graded insulation; one end being connected to the earth potential through a CT operated 

  milliammeter & tripping device, while the other end remains in floating condition as HT Terminal.

  The transformer will be designed to withstand frequent intermittent spark over or short circuit conditions under which such testing 

  transformers are designed to operate.

  HT terminal will be provided with anti-corona metallic ring of adequate diameter to facilitate uniform charge distribution.

  The HV Transformer will be mounted on MS trolley within insulated jacket.

Accessories :

  The set will be provided with .

    I. Power Cable of minimum 5m long - 1 No.

   II. Power Interconnector Cable of minimum 5m long- 1 No.

  III. Discharge rod with 5M long lead (grounding cable) with clamp- 1 No.

Optional at Extra Cost :

HV Potential Divider :

This is well known that for high capacitive loading the HV output may be more than the expected 

  voltage i.e. voltage ratio of the transformer. Hence, HV measurement is very vital in this high capacity 

AC HV Test set. There will be a capacitive HV Potential Divider provided with low voltage arm.

A UHF connector with co axial cable is used to connect a metering circuit (provided in the panel) to indicate 

  High Voltage.

  Rated max working voltage ï 100KV AC rms.

  The capacitor will be oil-cooled type, provided with corona guard and will be movable with wheels at bottom.

Documents :

The following documents will be provided along with the test set.

 Operation Manual.

 Works Test Report with traceability.

 Warrantee Certificate.

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.

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

40KV 10mA DC High Voltage Test Set

Technical Features:

Input Power Supply                        : 230V ± 10%, 50Hz +3%/-5%, 1 Phase AC.

Output Test Voltage                        : Continuously variable from 0 to 40 KV DC.

Max. output current                        : 10mA max. at HT side.

Duty                                                  : Intermittent duty cycle, i.e., 5 mins ON, 10 mins. OFF.

Inbuilt dwell timer and preset timer functions.

Electromagnetic Compatibility (EMC): Suitable for 66kV substations.

Safety category for the instrument: CAT IV as per IEC 61010

Protection & Interlock:

Zero start interlock

Earth connection open interlock

AC back feed, return wave, transient and surge protection.

Auto discharge facility.

Automatic tripping mechanism against over loading.

Over voltage Indication.

DC High Voltage Assembly Unit:

HV Transformer & DC HV Block mounted on MS trolley within Insulated jacket.

The Transformer & DC HV Block cast resin type.

Designed to withstand frequent intermittent spark over or short circuit conditions

Series resistance to limit inrush of current at the output.

Accessories:

3-pin Input Power cord with plug-3M

Interconnecting cables between the units-3M

Discharge rod with grounding cable and earth clamp-10M

Ground cable-10M

Flexible screened High voltage cable-15M.

Carrying case/bag for accessories.

Documents:

Operation Manual(Instruction Manual)

Works Test Report

Warrantee Certificate

Approx. Dimension in mm.

Length =550mmXWidth=395mmXHeigth=395mm

Approx. Weight in Kg.

35Kg.

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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