Eaton A210 Manuale

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

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

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

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.

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