AC High Voltage Insulation Test Set ( Up to 200kV)

AC High Voltage Insulation Test Set

Sr. No.

Parameters

Description

1

I/p Voltage

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

2

O/p Voltage

Up 200KV and 200mA

3

Capacity

Up to 6KVA

4

Timer

0-9999 Sec./min. Digital

5

Control

1- The unit can be manual/motorized control for voltage variation and push button controlled for HT actuation.
2-Selectror switch to select leakage current at 25%,50%,75% and 100% of the mA capacity required.
3- The unit can be microprocessor based complete with on board memory, printout facility, programmable features etc.
4- The unit can be PLC based complete with computer, HMI memory, printer etc. for operation.

6

Metering

Voltmeter : One Digital type connected on HT side to indicate the output voltage
Scale : 0-60 kV AC.
Ammeter : One Digital type ammeter Connected on earth side to indicate the leakage Current on sample under test.
Scale : 0-100mA

7

Protection

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

8

Interlocking

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

9

Construction

AC High voltage test set consists of
1) Control panel cum Regulating Transformer cum High Voltage Transformer.

9(a)

Control Panel

Consist of :
LT ON Indicator , Push button to actuate HT, HT ON Indicator,Push button to deactuate HT, Fault Indicator (HT OFF Indicator), Push Button Switch to increase / decrease the output voltage, Tripping selector switch with tripping @ 10-15-20-25-30-35-40-50-60-70-80-90-100mA, Timer ON/OFF Switch, Switch for rate of rise @ 0.5kV/sec and 2kV/sec, Timer Digital, Digital KV Meter, Digital mA Meter

9(b)

Regulating Transformer

Continuously variable transformer which feeds 0-230 V, to the main HV transformer. The voltage is boosted in ratio with transformer design. No wave shape distortion will take place. One terminal of HT transformer is maintained at earth potential through CST terminal, the other Ht terminal is brought out on suitable H.T. Load.
Protection: The protective circuit incorporated in this unit consist of the following :
A) Zero Start Interlocking
B) Over current relay with current selection
C) Cage door at top side
This prevents accidental start of unit after break down.

9(c)

HV Transformer

The Main step up transformer is housed inside the body supported with welded angle iron frame and the output has been brought out through H.T. Terminal.