AC High Voltage Low capacity testers are specially designed for testing Insulators , CT’s PT’s , Low dielectric capacitive electrical equipment, transformers etc. as per National and International Standards. During manufacturing each unit is tested at multiple stages, thus ensuring consistency and best quality. These instruments are air cooled, oil cooled or air & oil cooled combined as per design. The units have been manufactured up to 800kV and up to 200kVA.The units have type of tests such as dry withstand, wet withstand, breakdown voltage in air/oil, oil insulation, and pollution Test.
| AC High Voltage Low Capacity Test Set | ||
| Sr. No. | Parameters | Description |
| 1 | I/p Voltage | 220/230V or 380/400V, 50 or 60HZ AC supply |
| 2 | O/p Voltage | Up 800KV and 250mA |
| 3 | Capacity | Up to 200KVA |
| 4 | Timer | 0-9999 Sec./min. Digital |
| 5 | Control | Type 1- The unit can be manual/motorized control for voltage variation and push button controlled for HT actuation. Type 2- The unit can be complete with on board digitized panel with or without computer connectivity. Type 3- 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 : 0-800 kV AC. Ammeter : One Digital type ammeter Connected on earth side to indicate the leakage Current on sample under test. Scale : 0-500mA Applicable only for type -1 For type -2 and type 3 metering is self contained |
| 7 | 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 Overvoltage - This is used as a secondary protection in case the output voltage exceeds the preset value |
| 8 | 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 untill good earthing is not provided. |
| 9 | Termination | The HT output on suitable HT insulator and other point at earth potential will be brought out on suitable insulator |
| 10 | Control Panel | The control panel is designed for five unique purposes. 1 -Control 2- Measure 3- Protect (Active and Passive) 4- Tripping 5 -Annunciate |
| 11 | HV Transformer | The transformers are designed and manufactured as per IS /IEC guidelines. Single / Multiple stage step up transformers are utilized for achieving 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. |
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