New EA Technology Wireless Phase Reference Accessory (UTP2-WPR)
In high voltage insulation systems phase plot is critical to understanding partial discharge.
What is Phase Plot?
Phase Plot is phase resolved partial discharge (PRPD) pattern; it is a visual representation of partial discharge (PD) activity relative to the 360 degrees of an AC cycle.
What Is Partial Discharge (PD) Activity?
Partial Discharge (PD) activity will be caused by some sort of defect within, or on the surface of, a high voltage (HV) insulation system.
These defects can include:
- Voids
- Gaps
- Splits
- Physical sharp points
- Imperfections etc on/within HV assets
The defect itself discharges as it is not able to insulate the voltage applied across it.
How do I interpret a PRPD pattern?
A PRPD plot shows the amplitude of each discharge event (vertical axis) plotted against their phase angle (horizontal axis).
As the primary voltage on a power system rises and falls over time, the voltage applied across each defect also rises and falls over time – causing the defect to discharge only at certain times and amplitudes. This is what creates the PRPD pattern.
Although the type of discharging defect will take on a recognisable shape, each PRPD pattern will be unique and common trends can still be seen in each defect type; PRPD patterns are the most useful tool in analysing and diagnosing PD activity within HV insulation systems.
Why Do I Need To Achieve Accurate Phase Lock:
- To ensure perfect phase reference
- Ensures the perfect phase reference / phase-lock every time, through multiple methods (mains power connection, e-field, Rogowski coil and photosensor)
- Wireless connection to the UltraTEV Plus2, up to 40 metres away
- Long life battery, up to 16 hours
The newly launched Wireless Phase Reference Accessory (UTP2-WPR) helps engineers achieve an accurate phase lock in any environment!
| Hardware Features: |
|
| Size |
115 x 118 x 50mm |
| Weight |
5200g |
| Enclosure |
Injection moulded plastic case |
| Connectors |
1x GCS1 Current Sensor (for a cable of 1.5m in length)
1x Power Barrel connector |
| Mounting Mechanisms |
Magnets in feet for metallic surfaces
Velcro Strap to wrap around cables (up to 100mm diameter) |
| Indicators |
4 x LEDs to indicate current Phase Reference Source
1 x bicolour LED for Wi-Fi/WPS status
1 x LED to indicate charging status
3 x LEDs for the Battery Level |
| Controls |
3 x Push Buttons |
| Phase Reference Features: |
|
| Sources |
Mains Input Power
Lighting (Photo sensor)
Electric field (High-Z sensor)
Rogowski Coil |
| Frequency Range |
50 Hz ± 1%, 60 Hz ± 1% |
| Accuracy |
±5deg |
VIEW DATA SHEET
VIEW THE WIRELESS PHASE REFERENCE ACCESSORY