Current interruption in a vacuum is recognized as the ideal switching technology in the medium voltage range, and it’s also applied in high-voltage and low-voltage applications. Excellent switching capabilities and compact design make vacuum interrupters the most economical switching device solutions possible.
Jennings vacuum interrupter designs handle a wide range of voltage and current interrupt levels, and high quality and highly reliable interrupters are available for the utility and industrial markets.
Vacuum Interrupter Products
|Cat No.||Operating V oltage (kV)||1 minute DWV (kV)||Rated short circuit current (A RMS)||Rated continuous current (A RMS)||Contact force at contact separation (lbs. Max.)||Mechanical Life (operations)||Body diameter (in.)||Body Length (in.)||Total Length (in.)||Stroke contact gap, in.)|
|RP158||3.6||45||-||300||7,7 ± 20%||2000000||2.44||2.81||4.49||0.11|
|RP233||25||40||-||3 at 32 MHz||2 lbs. 8 oz.||1500000||1.31||4.18||5.68||0.12|
Jennings vacuum interrupters feature an evacuated ceramic insulating envelope surrounding two contacts, one fixed and one movable.
The movable contact is operated from the outside through a metallic bellows. Contacts are typically a copper alloy that is developed for use in AC voltage applications. The end plates are made of stainless steel or copper.
Features and benefits
- Long life, high reliability – Vacuum interrupters can be expected to last the life of the equipment in which they are installed
- Controlled contact erosion results in virtually maintenance-free operation
- Fast interrupting speed – The interruption mechanism is independent of current magnitude, so interruption can normally be anticipated at the first current zero with no re-striking
- Rapid dielectric recovery – The dielectric strength of the contact gap recovers more rapidly than the recovery voltage can rise, eliminating re-striking
- High cycle withstand voltages
- Robust, compact design – Vacuum dielectric enables contacts to be arranged close together so circuit interruptions can be designed in a smaller envelope
- Environmentally friendly – Current interruption occurs in a vacuum, so there is no emission of greenhouse or toxic gases
- Atmospheric contact contamination is eliminated
- Oxides and corrosion layers cannot form in the vacuum environment
- Noise-free and flash-free – All arcing is confined within the vacuum interrupter body
- Load break switches
- Contactors for industrial and motor control (example: Jennings contactors use Jennings vacuum interrupters)
- Capacitor bank switching
- Circuit breakers
- Specialty RF and DC applications
- Power distribution
- Power transmission
- Steel smelters
- Offshore drilling