AC High Voltage High Capacity PD Free Test Set

Partial Discharge Free High Voltage High Capacity Test Set

Sr. No.

Parameter

Description

1

Input Voltage

220/230 or 380/400V, 50/60HZ AC Supply

2

Output Voltage

Up to 800KV and 4A

Integration of reactor after 100KVA,
Integration of series and parallel reactor after 1500KVA

3

Partial Discharge Level

Less than 2pC up to 300kV and less than 10pC up to 600kV

4

Capacity

Up to 3000kVA

5

Timer

0-9999 Sec./min. Digital

6

Control

Manual Control

The unit can be manual/motorized control for voltage variation and push button controlled for HT actuation

Digitized Control

The unit can be complete with on board digitized panel with or without computer connectivity.

PLC based

The unit can be PLC based complete with computer, HMI memory, printer etc. for operation.

7

Metering

Voltmeter : One Digital type connected on HT side to indicate the output voltage
Scale : 0-800 kV AC.
Ammeter : One Digital type ammeter Connected on earth side to indicate the leakage Current on sample under test.
Scale : 0-40A
Applicable only for type -1 i.e. manual control.
For type -2(Digitized Control) and type 3(PLC Based Model) metering is self contained

8

Protection

Tripping

A fast acting DC relay will isolate the circuit when the current exceeds pre-set level

Overload

This is used as a secondary protection in case the input loads exceeds the preset value

Over voltage

This is used as a secondary protection in case the output voltage exceeds the preset value

9

Interlocking

Zero Start Interlock

The unit will have zero start interlocking to avoid the transients on HV transformer and provision for cage door interlocking shall also be provided.

Earth Interlock

It ensures that HV will not actutae until good earthing is not provided

10

Termination

The HT output on suitable HT insulator and other point at earth potential will be brought out on suitable insulator

11

Control Panel

The control panel is designed for five unique purposes.
1 -Control
2- Measure
3- Protect (Active and Passive)
4- Tripping
5 -Annunciate

12

Reactor

A Parallel / series reactor (LT and HT) when provided in the system resonates with the capacitive current generated during the dielectric testing of any component / equipment / system. It generally consist of motorised moving coil and fixed reactor. It operates up to a Q-factor of 20.

13

HV Transformer

The transformers are designed and manufactured as per IS /IEC guidelines. Single / Multiple stage stepup transformers are utilized for acheiving the desired voltage. The units are designed and manufactured using the preeminent material from India and Abroad. The coils are vacuum impregnated and insulated with High Quality EHV Grade transformer oil as per relevant IS and IEC Standard.