Brochure

© 1998 Square D All Rights Reserved
2
5/98
AC MAGNETIC CONTACTORS
CLASS 8502
General Information
Class 8502 Type S magnetic contactors are used
to switch heating loads, capacitors, transformers,
and electric motors where overload protection is
separately provided. Class 8502 contactors are
available in NEMA Sizes 00-7. Type S contactors
are designed for operation at 600 Volts, AC 50-60
Hertz.
Holding Circuit Contact
A normally open holding circuit contact for three
wire control is provided on all contactors as
standard. Sizes 00-2 contactors use a Class 9999
SX11 auxiliary contact as the holding circuit
contact. Sizes 3-7 contactors use a Class 9999
SX6 auxiliary contact as the holding circuit
contact. See Class 9999 for the holding circuit
contact electrical ratings. On Size 00-1 single
phase contactors, a power pole is used as the
holding circuit contact and therefore has the same
rating as the power contacts.
Enclosures
Class 8502 magnetic contactors are available in
the following enclosures:
• NEMA Type 1 General Purpose
• NEMA Type 4 & 4X Watertight and Dusttight
Stainless Steel
• NEMA Type 4X Watertight, Dusttight, and
Corrosion Resistant Glass — Polyester
• NEMA Type 7 & 9 Bolted and Spin-Top for
Hazardous Locations
• NEMA Type 12 Dusttight and Driptight for
Industrial Use
The NEMA Type 4 & 4X stainless steel enclosure
(Sizes 0-5) has a brushed finish. For an
electropolished finish, specify Form G16 and add
15% to the price of the standard device.
Also, NEMA Type 12 devices are available UL
Listed for use in Class II, Division 2, Group G and
Class III, Divisions 1 and 2 locations. Request
Form G21, no additional charge.
Separate enclosures are available, see Class
9991.
AC MAGNETIC STARTERS
CLASS 8536
General Information
Class 8536 Type S magnetic starters are used for
full voltage starting and stopping AC squirrel cage
motors. Motor overload protection is provided by
melting alloy type thermal overload relays. Class
8536 starters are available in NEMA Sizes 00-7.
Type S starters are designed for operation at 600
Volts AC, 50-60 Hertz.
Holding Circuit Contact
A normally open holding circuit contact for three
wire control is provided on all contactors as
standard. Sizes 00-2 contactors use a Class 9999
SX11 auxiliary contact as the holding circuit
contact. Sizes 3-7 contactors use a Class 9999
SX6 auxiliary contact as the holding circuit
contact. See Class 9999 for the holding circuit
contact electrical ratings.
Overload Relays with Melting Alloys
Class 8536 Type S Sizes 00-6 starters are
provided with a melting alloy thermal overload
relay as standard. Interchangeable thermal units
are available in standard trip (Class 20) Sizes
00-6, quick trip (Class 10) Sizes 00-4, and slow
trip (Class 30) Sizes 00-3. Single-phase starters
use one thermal unit, 3-phase starters use three
thermal units.
Class 8536 Size 7 starters are provided with solid
state Motor Logic which has selectable trip
Class10/20, Ground fault detection, and
Communication capabilities for future
enhancement. The solid state overload relay is
ambient insensitive and features phase loss,
phase unbalance and over-current protection.
MOTOR LOGIC™ Solid State Overload Relay
(SSOLR)
Solid state overload relays are available for Sizes
00 – 7 starters. These ambient insensitive
overload relays provide phase loss protection,
phase unbalance protection and a LED power
indicator. For additional information, see the Class
9065 catalog section. To order Type S starters
with solid state overload relays, see Factory
Modification (FORMS).
Bimetallic overload relays are also available for
Sizes 0-6. Ambient Compensated and Non-
compensated versions are supplied with manual
Full Voltage Contactors and Starters — NEMA
Application Data – Class 8502, 8536
Type SCO3
Size 1, 3-Pole Starter
Starter with Melting Alloy
Starter with MOTOR LOGIC
Type SCO2
Size 1, 3-Pole Contactor