Brand Name: NTPL

Product Name: AC High Voltage Test Set

Product Code: ACHV

Series: Refer Catalog

Type: Refer Catalog

Product Specification:

NTPL” make High voltage testing sets are suitable for Power frequency AC high voltage test on transformers, motors, insulators, cables etc. The sets are capable of giving continuously variable AC HIGH VOLTAGE from zero to maximum rated output voltage.

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.

Brand Name: NTPL

Product Name: DC High Voltage Test Set

Product Code: DCHV

Series: –

Type: –

Product Specification:NTPL” make High voltage testing sets are suitable for testing electrical insulation of condensers, transformers, motors, insulators, cables etc. The sets are capable of giving continuously variable DC HIGH VOLTAGE from zero to maximum rated output voltage.

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 Overvoltage alarm & indication are provided.

Mode of Operation : Generally, sets are manually operated. Motorisation 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

Brand Name: NTPL

Product Name: AC-DC Combined High Voltage Test Set

Product Code: ACDCHV

Series: –

Type: –

Product Specification:The above test set is suitable to perform AC High Voltage Power Frequency test on transformers, motors, cables etc. Leakage current can be measured at desired pressure and this set can be used as a source for cable fault burning.

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.

They are,

1) Cable fault-burning mode.

2) 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.

DC milliammeter 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.

Brand Name: NTPL

Product Name: High Voltage Impulse Test Set-up

Product Code: –

Series: –

Type: –

Product Specification: