Eaton A210 Manual

INSTRUCTION LEAFLET IL15466 Effective MAY 2011
Supersedes MARCH 1989
Instructions for A210, A250
Size 3 or 4 Reversing Motor Controller
THE CONTROLLER
An A210 or A250 motor controller, when wired as shown in the
appropriate connection diagram will operate as a full voltage starter and
will give protection against overload, but not against short circuit currents,
when wired and provided with overload relay (OLR) heaters as listed
in heater selection tables or when used with any means of inherent
protection activated by motor temperature.
The controller should be protected against short circuits by providing
branch circuit protection not to exceed the maximum protective device
ratings listed in Table II.
This industrial type control is designed to be installed, operated, and
maintained by adequately trained workmen. These instructions do not
cover all details, variations, or combinations of the equipment, its storage,
delivery, installation, check out, safe operation, or maintenance. Care
must be exercised to comply with local, state, and national regulations,
as well as safety practices, for this class of equipment.
AUXILIARY CONTACTS - L56
(RATED B600)
Two L56’s, each with one normally open pole
and one normally closed pole, are supplied as
the holding circuit auxiliary and electrical interlock
between the two coil circuits. A maximum of three
L56 auxiliary units can be installed in the recesses
of each contactor. These may be mounted with
the terminals in line with the power poles or may
be mounted with the terminals in a right angle
relationship to the power poles. They mount by
means of a spring clip which snaps into locations
provided in the motor controller unit. To remove the
L56 disengage the top spring clip, by pressing on
the extended tab, and withdraw the unit.

2EATON CORPORATION www.eaton.com
INSTRUCTION LEAFLET IL15466
Effective May 2011
Instructions for A210, A250 Size 3 or 4 Reversing
Motor Controller

3
INSTRUCTION LEAFLET IL15466
Effective May 2011
EATON CORPORATION www.eaton.com
Instructions for A210, A250 Size 3 or 4 Reversing
Motor Controller

4EATON CORPORATION www.eaton.com
INSTRUCTION LEAFLET IL15466
Effective May 2011
Instructions for A210, A250 Size 3 or 4 Reversing
Motor Controller

5
INSTRUCTION LEAFLET IL15466
Effective May 2011
EATON CORPORATION www.eaton.com
Instructions for A210, A250 Size 3 or 4 Reversing
Motor Controller

Eaton Corporation
Electrical Sector
1111 Superior Ave.
Cleveland, OH 44114
United States
877-ETN-CARE (877-386-2273)
Eaton.com
© 2011 Eaton Corporation
All Rights Reserved
Publication No. IL165466/ 001
May 2011
Eaton is a registered trademark of Eaton
Corporation.
All other trademarks are property of their
respective owners.
INSTRUCTION LEAFLET IL15466
Effective May 2011
Instructions for A210, A250 Size 3 or 4 Reversing
Motor Controller
MAINTENANCE - First Turn Off Power
To Inspect Contacts
Refer to Figure 11. Loosen the two arc box assembly screws
(7) located immediately above and below the nameplate and
remove the arc box (8). Contacts (5) are visible. Retighten
the screws per Table V.
To Replace Contacts
After removing the arc box and with replacement contacts at hand,
compress the overt ravel spring (12) and remove the moving contact
(5) from the crossbar (6). Remove the retaining screws (11) and lift
out the stationary contact assembly (14).
To replace contacts, reverse the above procedure, making sure that
stationary contacts are secure, (see Table V) moving contacts are
free to move, overtravel springs are seated and the crossbar moves
freely when the arc box is in position.
The silver cadmium oxide contact buttons need NO dress-
ing or lubricant throughout their life. Important - Replace all
contacts and springs as a group to avoid misalignment.
To Replace The Coil
Refer to Figure 11. Loosen the assembly screws
(10) located to the immediate left and right of the arc box. Remove
connector straps to the overload relay. Pull the loosened upper base
structure (9) forward. Pull the coil (1) from the upper base, plug in
a new coil, replace the upper base structure and check the auxiliary
contacts for secureness when repositioning the upper base. Tighten
the assembly screws and the connector straps screws referring to
Table V.
Magnet - Armature Assembly
Self alignment and permanent air gap features of the magnet arma-
ture make replacement unnecessary. Mating pole face surfaces
should be kept clean. Arc box must be in place when the contactor
interrupts a circuit.