Mica Splittings Dielectric
EMCs are safe for use in operating equipment because they have excellent electrical properties due to an 80 mm (3 inch) layer of epoxy impregnated mica splittings as the main dielectric. In comparison, a typical 13.8kV stator coil has only about 3 mm (0.25 inch) thickness of epoxy mica paper.
Voltage Endurance Testing
Independent voltage endurance testing (IEEE 1043) proved that Iris Power EMCs withstand over 1000 hours at 30kVrms. According to statistical methods (IEEE 930-1987) this translates into 60,000 years of use at normal operating voltage. By comparison, the average 13.8kV coil is expected to withstand only 400 hours of exposure to 30kVrms. The EMCs excellent endurance and thermal stability is due to the use of mica splittings, as opposed to mica paper or ceramics.
|EMC Voltage Rating|
|DEV @ 1pC (kV)||8||15||25||28|
|AC Hipot (kVrms)||15||33||51||57|
|Height||92mm (3.6”)||127mm (5.0”)||206mm (8.1”)||206mm (8.1”)|
|Diameter||89mm (3.5”)||89mm (3.5”)||89mm (3.5”)||89mm (3.5”)|
DC and Impulse Capability (BIL)
Iris Power EMCs have been independently tested to DC hipot and lightning impulse strengths far greater than any other apparatus in its voltage class. For example, Iris Power 16kV EMCs have passed:
- 150kV DC hipot (50kV required by ANSI C37.20.2)
- 150kV impulse (95kV required by ANSI C37.20.2)
- Mica Splittings Dielectric
- Voltage endurance tested (IEEE 1043) to >1000 hours at 30kVrms
- Capacitance rating: 80pF +/- 4pF
- Dissipation factor: 0.10%
- Sensitivity: 1 pC (ASTM D1868 and IEC 60270)
- Bandwidth: (-3dB); 40MHz to 350MHz
- Operating temperature range: -50°C to +130°C (-67°F to +266°F)
- Electrical Tracking Resistant (ANSI/IEEE C37.20.2)
- 60,000 year life (IEEE 930-1987)
- Thermal Cycle Testing to -40°C to +150°C
These EMCs can be used with Iris Power instruments certified for hazardous locations provided that they are installed in the appropriate enclosure to comply with the ATEX directive or UL certification for hazardous locations.
EMC kits with installation material according to IEEE 323-1983 for Nuclear Power Generating Stations are available.