Brochure

37
5/98
© 1998 Square D All Rights Reserved
Auxiliary Contact Units
Additional auxiliary contact units may be added to
the Size 4 and 5 reversing contactors in the field.
A maximum of 2 units may be added to the Size 4;
a maximum of 1 unit may be added to the Size 5.
No additional units may be added to the Size 6,
however, 1 N.O. and 1 N.C. circuit are available on
each forward and reverse contactor for customer
use.
GENERAL INFORMATION
Class 8702 Type W reversing vacuum contactors
are a new addition to the Square D line of
contactors. These reversing contactors are used
to switch capacitors, transformers and electric
motors where overload protection is separately
provided. Type W reversing vacuum contactors
are designed for operation at 600 Volts, 50/60
Hertz.
By design, these contactors are well suited to
heavy-duty applications in harsh environments.
The power contacts are sealed in ceramic tubes,
called vacuum interrupters or vacuum bottles,
where the air has been evacuated. Arc quenchers
are not required because any arc formed between
opening contacts is not sustained due to the
presence of the vacuum. The arc is extinguished
when the current crosses zero after the contacts
are opened, therefore the arc typically does not
survive more than one half cycle. There is one
vacuum interrupter or bottle per pole, therefore a
three pole contactor has three vacuum
interrupters or bottles. The power contacts are not
affected by ambient conditions or contamination.
This provides for long life and reliable operation in
harsh applications.
Altitude
The reversing vacuum contactor is designed to
tolerate normal barometric pressure variances up
to 6600 feet above sea level. If the contactor is to
be used above 6600 feet above sea level, please
consult the factory.
Termination Means
The Size 4 reversing vacuum contactor is
supplied with line and load side lugs. The Size 5
and 6 reversing vacuum contactors are supplied
without line and load side lugs. Class 9999 Type
LUW5 and LUW6 lug kits are available for the Size
5 and 6 contactors. These kits include six lugs and
the necessary mounting hardware.
Auxiliary Contacts
An auxiliary contact block, Class 9999 Type
WX11, with one normally-open contact and
normally-closed contact is used with Size 4, 5 and
6 vacuum contactors.
Class 8702 – Full Voltage Reversing Vacuum Contactors (Horizontal Only)
3-Pole Polyphase – 600 Volts AC Maximum (50-60 Hertz)
NEMA Size
Enclosed
Ampere Rating
Locked Rotor
Current (Amps)
Motor Volts Max. HP t Coil Voltage
Open Type
Type
4 135 1080
200 40 120 WFO3V02S
230 50 240 WFO3V03
380 75 120 WFO3V02S
460 100 480 WFO3V06
575 100 600 WFO3V07
5 270 2160
200 75 120 WGO3V02S
230 100 240 WGO3V03
380 150 120 WGO3V02S
460 200 480 WGO3V06
575 200 600 WGO3V07
6 540 4320
200 150 120 WHO3V02S
230 200 240 WHO3V03
380 300 120 WHO3V02S
460 400 480 WHO3V06
575 400 600 WHO3V07
Full Voltage Contactors — NEMA
Application Data, Selection – Class 8702
Class 8702 Type WF
Reversing Vacuum
Contactor
File LR60905
Class 3211-04
File E78351
CCN NLDX2