Vacuum starters are designed with the main contacts in sealed vacuum bottles. These three-pole devices are suitable for contaminated atmospheres and offer long life and low maintenance. Models are available for amperage ratings ranging from 135A to 540A and are provided with solid state overload relays.
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Digest 178 – NEMA and Definite Purpose Contactors and Starters
Motor Control, NEMA Products, Contactors, Starters – Definite Purpose, Duplex Motor Controllers, Overload Relays, Pump Panels, Contactors – Definite Purpose, Separate Enclosures / Replacement Parts, Contactors – Lighting, Contactors – Vacuum, Starters – Combination, Starters – Reduced Voltage, Starters – Vacuum, Starters/Protectors & Switches – Manual, Starters | Schneider Electric