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

3
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

5
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
© 2011 Eaton Corporation
All Rights Reserved
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