AC HIGH VOLTAGE TEST SET
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.
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.
Continuously variable from zero to maximum rated output voltage
Spread over a wide range of sets from 2.5KV to 300KV AC having capacities from several VA to hundreds of KVA.
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.
Analog voltmeter & milliammeter/ammeter. Digital meters may be provided at extra cost.
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 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.
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.
Type of transformer Oil cooled or Cast Resin
Mode of operation: Manual/Motor operated/ Fully automatic.
Any other details you find important to be specified