EMPDC Partial Discharge Sensor Coupling-Capacitor
EMPDC Epoxy-Mica Partial Discharge Sensor Coupling-Capacitor.
Description
Capacitive coupler
The capacitive coupler installed at the high voltage end adopts 80pF epoxy mica capacitor, which is free from interference and corona at 20kV voltage, and can prevent discharge traces and surface discharge. The main performance indicators are as follows:
- Capacitance rating: 80pF±4pF
- Dissipation factor <0.10%
- PDEV Sensitivity: 1 pC (ASTM D1868 and IEC 60270)
- Bandwidth into 50 ohms (3 dB): 40 MHz to 500 MHz
- Operating temperature range: -50 °C to +125 °C (-58 °F to +257 °F)
- Thermal Cycle Testing to -40°C to +125°C
- Inclined Plane Tracking Test: 300 min (ASTM D2303-85)
- Comparative Tracking Index: 600 min (IEC 60112)
- Lifetime Warranty on manufacturers defects
EMC Voltage Rating |
6.9 kV |
16 kV |
25 kV |
|
| DEV @ 1 pC | 8.0 kV | 18.6 kV | 29.0 kV | |
| AC Withstand | 15 kVms | 33 kVms | 51 kVms | |
| BIL | 80 kV | 125 kV | 150 kV | |
| Mass | 1.1 kg | 1.6 kg | 2.0 kg | |
| Height | 95 mm
(3.75”) |
127 mm
(5.0”) |
206 mm
(8.1”) |
|
| Diameter | 86 mm (3-3/8”) | 86 mm (3-3/8”) | 86 mm (3-3/8”) |
Key Features Comparison Table
EMPDC6.9-0080 |
EMPDC16-0080 |
EMPDC25-0080 |
|
| Nominal Voltage Un
(Phase to Phase) |
6.9kVrms | 16kVrms | 25kVrms |
| Typical Machine Nominal Voltage | 6.9kV | 16kV | 25kV |
| Nominal Capacitance | 80pF | 80pF | 80pF |
| PD inception Voltage | > 8kVrms | > 18.6kVrms | > 29kVrms |
| Creeping Distance
Height |
~200mm
95mm |
~300mm
127mm |
~450mm
206mm |
| BIL (1.2/50us)
IEC 60060-1 |
80kVp | 125kVp | 150kVp |
| Type Test Voltage
1min / IEC 60071-1 |
20kVrms | 40kVrms | 50kVrms |
