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Capacitor switches

Eaton's Cooper Power series Edison capacitor and Type NR oil switches are primarily used for switching capacitor currents, but could also be used for inductive applications. The NR switch is motor-operated, whereas the Edison capacitor switch is solenoid-operated. Both switches include an integral operating handle for position indication or manual operation. Specialty applications are available.

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Durable
Harsh coastal environment application
Reliable
Field-proven design
Economical
Vacuum insulation with low-cost oil option

Core features

  • Switches can be opened and closed by either local or remote controls
  • Switches include hotstick-operated manual trip handle, which also provides visual indication of switch position
  • All switches have optional wildlife protection kits available to prevent contact with wildlife, trees or line crews performing maintenance
  • Produced in ISO 9001- and 14001-certified facilities
  • Supplied with standard 5-pin and 6-pin configurations. Consult factory for other available options

Zero voltage closing (ZVC) with Eaton's Edison capacitor switch

Initiating the switching device to close at the instant of zero voltage difference across the switch reduces transients during operation. Zero voltage closing is an ideal solution for multi-step applications where inrush current and frequency may impact on the system. Eaton’s Edison capacitor switch, combined with the Valquest Z-Cap control, can be used with any industry capacitor control including Eaton’s CBC-8000 capacitor bank control, to provide Integrated Volt/VAR Control IVVC.
Valquest product information

Durable and reliable capacitor switching

Eaton’s Cooper Power series Edison capacitor switch features direct drive, permanent magnetic latching solenoid and vacuum interrupting technology, eliminating the need for maintenance with an environmentally friendly gas/foam/oil-free design. By excluding internal cams, linkages, struts, electronic circuit boards and relays, the switch is able to endure severe mechanical operations, thus demonstrating the ability to operate reliably in applications that require a high degree of cycling.

Designed to withstand harsh environments

Eaton’s Cooper Power series Edison capacitor switch is designed and tested to operate effectively in the harshest of environments. Cycloaliphatic epoxy bushings are highly resistant to ozone, moisture, contamination and ultraviolet light. The specialised alternating shed design has improved flashover performance and is designed to IEC 60815 Very High Pollution Severity standard. Fibreglass reinforced polyester tank design prevents corrosion and provides an integrated rain shield and guide for hot stick manual operation.
Specifications

Edison capacitor switch ratings

Rated maximum voltages (kV–LL)

25 (ungrounded)

38 (grounded)
Current rating 200 A & 400 A (15 kv)
Mechanical operations (1 close and 1 open) 50,000
Temperature rating -40 to +60°C
Short-time symmetrical withstand current (A) 4,500
Fault closing (A) 6,000
High frequency transient making peak current (A) 9,000 (12,000 optional)
Basic impulse level (BIL) (kV) 95–150

NR/NRV switch ratings

Rated maximum voltages (kV–LL)

22 (ungrounded)

34.5 (grounded)
Current rating 60A & 200A (15kV)
Mechanical operations (1 close and 1 open) 10,000
Temperature rating -40 to +46°C
Short-time symmetrical withstand current (A) 4,500
Fault closing (A) 6,000
High frequency transient making peak current (A) 12,000
Basic insulation level (BIL) 95–125 kV

Edison capacitor and NR switch standards

IEEE standards  C37.66
IEC standards (applies to Edison capacitor switch only)

60815-Part 1 (bushing)

60815-Part 3 (bushing)

Edison capacitor switch enclosure

Tank design Non-metal fiberglass reinforced polyester
Manual trip Integrated rain shield with visual trip indicator
Terminal orientation 360-degree termination in 60-degree increments
Conductor cable range

#8–2/0 (standard)

#6–350 MCM (optional) 
Bushing Cycloaliphatic epoxy bushing
Switch orientation Horizontal and vertical mounting

NR switch enclosure

Tank design

Painted mild formed steel (standard)

Stainless steel  (optional)

Zinc plated  (optional)
Manual trip Sleet hood and operating handle with visual trip indicator
Terminal orientation Vertical or horizontal
Conductor cable range #8–2/0
Bushing Porcelain
Switch orientation Vertical mounting only

Edison capacitor switch systems

Applications Pole-mounted banks, open air banks (externally fused, internally fused, or fuseless), metal-enclosed banks, mobile capacitor banks and speciality applications (HVDC, SVC, Series)
Control options

CBC-8000 capacitor control

Valquest Z-Cap (Zero Voltage Closing)

Consult factory for other control options

NR switch systems

Applications Pole-mounted banks, open air banks (externally fused, internally fused, or fuseless), metal-enclosed banks, mobile capacitor banks and speciality applications (HVDC, SVC, Series)
Control options CBC-8000 capacitor control
Download Links
  • Edison single-phase capacitor switch catalog
    This document contains ratings and ordering information for Eaton's Cooper Power series Edison single phase capacitor switch.
    (PDF 1 MB , 17/07/2025)
  • Electrically operated type NR oil switch catalog
    This catalog describes general ordering information for Eaton’s Cooper Power series type NR electrically operated, single-phase oil switch for switching inductive and capacitor currents.
    (PDF 312 KB , 01/08/2015)
  • TriSync three-phase capacitor switch catalog
    This catalog provides ratings and ordering information for Eaton’s Cooper Power series TriSync capacitor switch that delivers reliable and flexible solutions for demanding three-phase capacitor switching applications.
    (PDF 2 MB , 23/04/2024)
  • Type NR oil switch service part number cross reference
    This document provides Greenwood, SC, cross-reference part numbers for Eaton's Cooper Power series Type NR oil switch service parts previously supplied by South Milwaukee, WI.
    (PDF 68 KB , 01/02/2016)
  • Type NR oil switch spare parts list
    This document provides Greenwood, SC, part numbers for Eaton's Cooper Power series Type NR oil switch service parts previously supplied by South Milwaukee, WI.
    (PDF 70 KB , 01/02/2016)
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