Eaton A201 Manual

Instruction Leaet IL16960 Effective May 2011

Supersedes March 1989

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

THE CONTACTOR

Class A201 contactors are designed for the control of

inductive or non-inductive loads at voltages between 120 and

600, AC. The units are suitable for mounting on either steel

or insulated panels. All parts are front removable. Contactors

should be protected against short circuits by branch circuit

protective devices selected in accordance with the National

Electrical Code (NEC).

Two-pole contactors have the same current ratings as three-

pole devices but are not suitable for controlling three-phase

motors.

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 combination 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.

Figure 1. Fig. 1 Size 1, A201 Nonreversing Contactor

2EATON CORPORATION www.eaton.com

Instruction Leaet IL16960

Effective May 2011

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

AUXILIARY CONTACTS - TYPE J

Two J11 units are supplied mounted on reversing contactors.

A maximum of four auxiliary units can be installed in each non-

reversing contactor (three in each reversing contactor) with terminals

either in line or in a right angle relationship to the power poles.

Auxiliary contacts mount by means of a spring clip and retainer

screw. To remove the unit rotate the retainer screw several times

(counterclockwise) and then slide the auxiliary contact unit out of the

recess.

COIL

A201 contactors are available with a single or dual voltage coil. When

equipped with a single voltage coil, the contactor is wired as shown

in Figure 6. A connection diagram for a dual voltage coil is shown

in Figure 4. When supplied with a dual voltage coil, the contactor

is normally wired for the higher voltage connection. The wiring

may be changed to the lower voltage connection by removing and

reconnecting the jumpers as illustrated below.

Figure 2. Size 1, A251 Reversing Contactor

Figure 3. Dimension Drawings

AC COIL DATA, SIZE 00, 0 AND 1

(TYPICAL VALUES)

Inrush Sealed sealed Pickup Droput

VA VA Watts (Time in milliseconds)

160 25 7.8 16-24 12-16

Figure 4. Dual Voltage Coil Connections

Instruction Leaet IL16960

Effective May 2011

EATON CORPORATION www.eaton.com

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

MECHANICAL INTERLOCK

The Type M-33 and M-34 mechanical interlocks are used when a pair

of contactors must be mechanically protected against the closing of

one when the other is already closed. The two contactors may be

mounted side-by-side (A211 , horizontal configuration) or one above

the other (A251 , vertical configuration). The two contactors may

be any combination of pole arrangements. Type M-33 mechanical

interlocks are provided with A211 reversing contactors and Type

M-34 interlocks with A251 reversing contactors. These interlocks

occupy one recess in each contactor.

SHORT-CIRCUIT WITHSTAND

This motor controller is suitable for use on a circuit capable of

delivering not more than the current (rms symmetrical amperes)

shown below in circuits rated not more than the voltage shown

below:

1Inverse-Time Circuit Breaker

2Inverse-Time Current-Limiting Breaker

Figure 5. Connection Diagram A251

Figure 6. Connection Diagram A201

4EATON CORPORATION www.eaton.com

Instruction Leaet IL16960

Effective May 2011

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

Figure 7. Connection Diagram A211

Figure 8. Control Station Connection Diagrams

Instruction Leaet IL16960

Effective May 2011

EATON CORPORATION www.eaton.com

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

MAINTENANCE - First Turn Off Power

To Inspect Contacts

Refer to Figure 9. 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 III.

To Replace Contacts

After removing the arc box and with replacement contacts at hand,

compress the overtravel spring (12) and remove the moving contact

(5) from the crossbar (6). Disconnect any power cables. Remove the

retaining screw (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 III), 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 dressing or

lubricant throughout their life. Important - Replace all contacts and

springs as a group to avoid misalignment.

To Replace The Coil

Refer to Figure 9. Loosen the assembly screws (10) located to the

immediate top and bottom of the arc box. 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 referring to Table III.

Magnet - Armature Assembly

Self alignment and permanent air gap features of the magnet

armature make replacement unnecessary. Mating pole face surfaces

should be kept clean.

Arc box must be in place when the contactor interrupts a circuit.

Figure 9. A201 Magnetic Contactor (Exploded view)

Eaton Corporation

Electrical Sector

1111 Superior Ave.

Cleveland, OH 44114

United States

877-ETN-CARE (877-386-2273)

Eaton.com

Publication No. IL16960 / 002

May 2011

Eaton is a registered trademark of Eaton

Corporation.

All other trademarks are property of their

respective owners.

Instruction Leaet IL16960

Effective May 2011

A201, A211, A251, Size 00, 0 or 1 Magnetic

Contactor Nonreversing or Reversing

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