Sensors installed within the stator slots to detect partial discharge activity
Features
- Permanently installed under the line end stator winding wedges (in existing machines), or between the top and bottom bars (in new or rewound machines)
- Not connected to the high voltage winding, and they are not subject to any high electrical stresses
- Made from epoxy glass laminate, NEMA FR4 (Class F)
- 10-1000 MHz bandwidth (3 dB cut-off)
- 50 Ω impedance
- Dual output to distinguish slot from endwinding partial discharges
- 2.0 mm thick, width cut to fit stator slot, length trimmable to 53 cm
Options
- NEMA FR5 (Class H) available on request
- Hydrogen penetration kits for 6, 9 or 12 SSCs – comprehensive penetration kit requires only 1 hole in generator casing, includes termination box assembly (default) or termination box and extension cables, and nitrogen gas pressure tested to 2750 kPa or 400 psi
- 50/60 Hz voltage reference signal required (use one of the following): – Isolation Transformer in enclosure, for connection to potential transformer or EMC