V201K4CJ Datasheet, PDF (2/10 Pages) List of Unclassifed Manufacturers – Vacuum Contactors & Starters

D-2
Vacuum Contactors & Starters
NEMA, Special Purpose and Mining Rating
Product Family Overview
July 2008
D
Size 4 Vacuum Contactor
Product Description
Vacuum Contactors and Starters were
designed for starting and controlling
three-phase, 50/60 Hz, AC motors. Each
contact is enclosed in a vacuum bottle
to reduce and contain contact arcing.
This design offers excellent perfor-
mance for plugging and jogging appli-
cations.
Application Description
The Vacuum Contactors and Starters
are offered in three classifications.
They are NEMA rated devices up to
600V AC, Special Purpose rated
devices up to 1500V AC and Mining
rated devices rated up to 1500V AC.
Each device is tested to different stan-
dards to serve their market.
Typical applications include full
voltage control of three-phase squirrel
cage motors, primary control of low
voltage wound rotor motors and
circuit switching for low voltage capac-
itors for power factor improvement.
A vacuum contactor is affected by
atmospheric pressure on the bellows
of the vacuum bottles. Up to an alti-
tude of 6600 feet, the contactor is
designed to tolerate normal variations
in barometric pressure. If the contactor
is to be operated above 6600 feet
above sea level, consult your Eaton
representative.
Features
■ Rugged, compact and lightweight
■ Quiet operation
■ Electrical and mechanical interlocks
available
■ Long service life
Benefits
■ Easy maintenance with front remov-
able coil and auxiliaries
■ Eliminate extra surge suppressors
with the standard low chop
interrupters
■ Plan your preventative mainte-
nance schedule by utilizing the con-
tact wear indicator, standard on all
vacuum bottles
Operation
The contact structure of the vacuum
break contactor is located inside
sealed ceramic tubes that have been
evacuated of air. Any arc occurring
across the contacts upon opening is
automatically extinguished because
ionized air is not available to sustain it
— the arc breaks when the current
passes through zero. The arc typically
does not service beyond the first half
cycle once the contacts begin to sepa-
rate. The large arc chutes normally
associated with contactors of this size
are not required.The ceramic tube with
the moving and stationary contacts is
called a vacuum interrupter or bottle.
There is one bottle for each pole on the
contactor. A metal bellows (like a
small, circular accordion) within the
bottle allows the moving contact to be
closed and pulled open from the out-
side without leaking air into the bottle.
Both the bellow and the metal-to-
ceramic seals of these state-of-the-art
bottles have been refined to the point
where the possibility of loss of vac-
uum has been virtually eliminated.
Standards and Certifications
■ NEMA Devices
❑ UL Listed File #E1491, Guide
Number NLDX
❑ CSA Approved
■ Special Purpose Devices
❑ IEC 947-4-1
❑ CE Approved EN 60947-4-1
❑ UL Listed File #E1491, Guide
Number NLDX
❑ CSA Approved
For more information visit: www.EatonCanada.ca
CA08102002K