Eaton A210 Handbuch

Instruction Leaet IL16963 Effective May 2011

Supersedes June 1989

A210, A250 Size 00, 0 or 1

Reversing Motor Controller

THE CONTROLLER

An A2l0 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 - TYPE J

Two Jll auxiliary contacts, each with one normallyopen pole

and one normally-closed pole are supplied with reversing

controllers. One pole is used as the holding circuit auxiliary.

The other pole serves as an electrical interlock. A maximum

of three auxiliary units can be installed 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.

Figure 1. Size 1 A210 and A250 Motor Controllers

2EATON CORPORATION www.eaton.com

Instruction Leaet IL16963

Effective May 2011

A210, A250Size 00, 0 or 1

Reversing Motor Controller

TYPE B OVERLOAD RELAY (See Figure 1)

This A210 or A250 motor controller is usually equipped with a

Type B block type ambient compensated overload relay (with gray

reset rod). The controller can also be supplied with a non-ambient

compensated overload relay (with red reset rod). The relay is of

the bimetal actuated type equipped with a normally-closed control

contact. An optional isolated normally-open control circuit contact is

available for field mounting. When the overload relay trips, a yellow

dot will appear flush with the molded surface below the reset rod.

Resetting the relay returns this indicator to its normal concealed

position.

TYPE A OVERLOAD RELAY (See Figure 4)

The A210 or A250 motor controller can be equipped with a Type A

block type non-ambient compensated overload relay (unmarked and

with red reset rod) or with a block type temperature compensated

overload relay (marked “ambient compensated” and with gray reset

rod). The relay is of the bimetal actuated type equipped with trip

indicator, trip adjustment covering ± 15% of rating and a normally-

closed control contact. It may be operated with either hand or

automatic reset.

Reset operation is determined by the positionof the plate on the load

side of the overload base. Position the reset plate away from the

panel to set the “hand” position. Loosen the locking screw, move

the reset plate toward the panel, and retighten the screw to set the

“auto” position.

Automatic reset should not be used with 2-wire control circuits

where automatic starting of the motor may be hazardous.

Figure 2. A210 Dimension Drawing (Dim. in inches)

Figure 3. A250 Dimension Drawing (Dim. in inches)

Figure 4. Type A Block Overload Relay (OLR)

Instruction Leaet IL16963

Effective May 2011

EATON CORPORATION www.eaton.com

A210, A250Size 00, 0 or 1

Reversing Motor Controller

HEATERS

Heaters are not included with the motor controller and must be

ordered separately per the heater selection table and the information

listed below. When installing heaters be sure that connecting

surfaces are clean and heaters are attached securely to the relay

in the proper location with the screw provided. The trip rating of a

heater in a 400C Ambient is 125% of the minimum full load current

shown in Table I. When tested at 600 percent of its trip rating, the

relay will trip In 20 seconds or less.

Heaters should be selected on the basis of the actual full load

current and service factor as shown on the motor nameplate or in

the manufacturer’s published literature. When the service factor of

the motor is 1.15 to 1.25, select heaters from the heater application

table. If the service factor of the motor is 1.0, or there is no service

factor shown, or a maximum of 115% protection is desired, select

one size smaller heater than indicated. When motor and overload

relay are in different ambients and when using non-compensated

overload relays, select heaters from the table using adjusted motor

currents as follows: decrease rated motor current 1 % for each ·C

motor ambient exceeds controller ambient. Increase rated motor

current 1% for each OC controller ambient exceeds motor ambient.

COIL

The A210 or A250 motor controller is available with single or dual

voltage coils. When equipped with a single voltage coil, each

contactor is wired as shown in Figure 7, 8, 9, or 10. A connection

diagram for a dual voltage coil is shown in Figure 5. When supplied

with dual voltage coils, the motor controller 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.

WARNING

TO PROVIDE CONTINUED PROTECTION AGAINST FIRE AND SHOCK HAZ-

ARD, THE COMPLETE OVERLOAD RELAY MUST BE REPLACED IF BUMOUT

OF A CURRENT ELEMENT OCCURS. SEE TABLE II.

4EATON CORPORATION www.eaton.com

Instruction Leaet IL16963

Effective May 2011

A210, A250Size 00, 0 or 1

Reversing Motor Controller

SHORT-CIRCUIT WITHSTAND RATINGS

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:

Figure 5. Dual Voltage Coil Connections

REPLACEMENT COIL: ORDER BY PART NUMBER,

VOLTAGE, AND FREQUENCY

AC COIL DATA, (TYPICAL VALUES)

SIZE 00, 0 AND 1

Inrush Sealed sealed Pickup Droput

VA VA Watts (Time in milliseconds)

160 25 7.8 16-24 12-16

1 Instantaneous Adjustable Trip 2 Circuit Breaker

3Inverse-Time Circuit Breaker

4Instantaneous Adjustable Trip with Current-Limiting Attachment

5Inverse-Time Current-Limiting Breaker.

Figure 6. Control Station Connection Diagrams

Instruction Leaet IL16963

Effective May 2011

EATON CORPORATION www.eaton.com

A210, A250Size 00, 0 or 1

Reversing Motor Controller

Figure 7. A210 Connection Diagram (Type B OLR)

Figure 8. A210 Connection Diagram (Type A OLR)

Figure 9. A250 Connection Diagram (Type B OLR)

Figure 10. A250 Connection Diagram (Type A OLR)

Eaton Corporation

Electrical Sector

1111 Superior Ave.

Cleveland, OH 44114

United States

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

Eaton.com

Publication No. IL16963 / 001

May 2011

Eaton is a registered trademark of Eaton

Corporation.

All other trademarks are property of their

respective owners.

Instruction Leaet IL16963

Effective May 2011

A210, A250Size 00, 0 or 1

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 overtravel spring (12) and remove the moving contact

(5) from the crossbar (6). Disconnect any power cables. 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 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 11. Loosen the assembly screws (10) located to the

immediate top and bottom 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. Refer to Table V.

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 11. Size 1 Contactor (exploded View)

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