Reversing Magnetic Contactors and Starters

Class 8702 and 8736 reversing magnetic contactors and starters are available in the following enclosures:

• NEMA 1 General Purpose Enclosure

• NEMA 4 and 4X Watertight and Dusttight Stainless Steel
  (stainless steel enclosures ship with hubs installed in the top and bottom of the enclosure)

• NEMA 12 Dusttight and Driptight for Industrial Use

The NEMA 4 and 4X stainless steel enclosure (Sizes 0–5) has a brushed finish. Sizes 6 and 7 are painted sheet steel and are rated NEMA 4 only.

Also, NEMA 12 devices can be modified for NEMA 3R applications by drilling a 1/8 in. diameter hole in the bottom of the enclosure and using appropriate watertight conduit hubs.

Separate enclosures are available. See catalog 9999CT9701.

File E78351 CCN NLDX

File LR60905 Class 3211-04

Two normally open holding circuit contacts are provided on all reversing contactors and starters as standard. Sizes 00–2 contactors use a 9999SX11 auxiliary contact as the holding circuit contact. Sizes 3–7 contactors use a 9999SX6 auxiliary contact as the holding circuit contact.

Additionally, two normally closed auxiliary contacts are provided as standard and wired to prevent energization of both coils at the same time. Sizes 00–2 use a 9999SX12 auxiliary contact while Sizes 3–7 use a 9999SX7 auxiliary contact for this purpose.

See catalog 9999CT9701 for the holding circuit contact electrical ratings.

AC coils are available for application on 50–60 Hz. NEMA Sizes 00–5 are supplied with coils that are designed to operate satisfactorily on line voltages of 85%-110% of rated voltage. NEMA Size 6 and 7 contactors are supplied with a DC coil operated by a solid state rectifier circuit that is powered by an AC source and also operates on line voltages of 85%-110%.

Mechanical interlocks are available for replacement or field assembly of Type S reversing contactors and starters (Sizes 00-4 only). See catalog 9999CT9701 for additional information.

Additional auxiliary contacts can be added to Type S reversing contactors and starters. See the table Auxiliary Units — Class 8702 and 8736 Reversing for maximum number of auxiliary units and table Form Designations for Factory-Installed Auxiliary Contacts for Form designations for factory installed auxiliary contacts. See catalog 9999CT9701 for auxiliary contact kits for field installation.

Additional accessories such as power poles and cover mounted control stations are available as factory or field modifications.

These ambient-insensitive overload relays are available on three-phase devices, Sizes 00–6, and standard on Size 7. They provide phase loss and phase unbalance protection. To order, add Form H30 (for selectable trip class 10 or 20 protection). For more information about Motor Logic solid-state overload relays (SSOLRs), see the overload relay section Solid-State Overload Relay Forms or the Digest. (Catalog number example: 8736SCO8V06H30).

The Adapted Bimetallic or Solid-State motor starter consists of a specially designed adapter that attaches with bus bars to the NEMA Type S contactor and holds the IEC Style overload relay: LRD/LR3D bimetallic or LR9D solid state. This starter configuration is ordered by adding Form E (adapter only) to the standard catalog number. Based on the FLA of the motor, the LRD, LR3D, or LR9D overload relay can then be purchased separately and installed in the field to operate the starter. For more information, see Adapted Bimetallic Overload Relay Forms or the Digest. (Catalog number example: 8736SCO8V06E—without overload relay).

TeSys T is a flexible system that integrates seamlessly into your automation system through five major communication protocols. TeSys T can predict what will happen in the process, as it accurately monitors current, voltage, and power over a wide range. For additional information about the TeSys T Motor Management System, see the TeSys™ T Motor Management System section TeSys™ T Factory Modifications (Forms) or the Digest (ordering example: 8736SCO8V06H616).

Melting alloy type thermal overload blocks are installed as part of the starter, and thermal elements must be selected and installed separately in order to operate the starter. For a three-phase motor, three thermal units must be ordered using the Thermal Unit Selection tables in the Digest. The catalog number includes no Form number (for example, 8736SCO8V06).