EC&M Crane Control Class 7135, 7136, 7145, 7146

Crane Control Class 7135, 7136, 7145, 7146 DC Reduced-Voltage Motor Starters

APPLICATION DATA AND WIRING DIAGRAMS

Enclosures Construction – Sheet steel, welded construction. #14 gauge: NEMA Size 1 through 4. Types –NEMA 1 Gasketed, NEMA 12, and Open.

Protective and Auxiliary Devices

Description

Class & Type

Function

Provides full field during acceleration to base speed, and provides current limit control to final operating speed. Avoids the effects of too rapid deceleration and limits the armature current and voltage during deceleration. Prevents motor from “running away” in case the motor field is accidentally opened. Protects motor shunt field against overheating (by inserting series resistance) when shunt field is energized and motor is at rest. Prevents closing of directional contactor until motor has come to rest after running in forward or reverse direction.

Field Acceleration Relay (FA)

7001, KFO N.O.

Field Deceleration Relay (FD)

7001, KFO N.C.

Field Loss Relay (FL)

7001, KIO

7001, KFO N.O. (25 A continuous)

Field Economizing Relay (FE)

Non-Plugging Relay (NP)

7001, KGO

Undervoltage Relay (UV)

7001, KFO70

Recommended with master switch operation.

Jog (Inch) Relay

CA3DN

Allows small movements of driven machine.

Control Relay

CA3DN

Used for auxiliary controls.

9065 Melting Alloy or Bimetallic or 9055 Magnetic

Current sensing devices which detects overload condition and removes motor from source of power. Relays are hand reset type.

Overload Relay (OL)

Short Circuit Protection

Per Horsepower Rating

Fused knife switch.

Connected across motor shunt field to provide voltage discharge path when field is opened. Inserts a resistor in motor armature circuit when armature is disconnected from power source. With shunt field energized this causes motor to run as a loaded generator which makes it to come to a quick stop.

Surge Suppressor

MOV Type

Dynamic Braking Contactor (DB)

7004, Type M

Elementary Wiring Diagrams

Constant Speed, DC Starter

Adjustable Speed, DC Starter

(A2) FIELD SERIES

(A2) FIELD SERIES (S1)

(A1)

2A

–

–

2A

(A1)

ARM

ARM

(S2)

(S2)

(S1)

1A

OL

M

+

R2 1A

OL

M

+

R2

FA

ACCELERATION RESISTOR

R3

R1

ACCELERATION RESISTOR

R3

R1

FA

SHUNT FIELD

SHUNT FIELD

12

11

11

FIELD RHEOSTAT

(F1)

(F2)

(F1)

(F2)

FU1

FU2

FU1

FU2

START

START

STOP

STOP

OL

OL

2

3

3

1

2

1

5

5

6

M

M

1AR

M

4

7

6

1AR

M

4

1A

CRANE CONTROL CLASS 7135, 7136, 7145, 7146

7

(2)

(3) 1.2 SEC

1A

(2)

(3) 1.2 SEC

2AR

1A

CLASS 7136

9

8

2AR

1A

2A

CLASS 7135

9

6

2

8

(2)

(3)

NEMA Size 2, 3 & 4

2A

NEMA Size 2, 3 & 4

1.2 SEC

(2)

(3)

1.2 SEC

2A

2

10

6

FA

122

© 2003 The Electric Controller & Mfg. Co., LLC All Rights Reserved

09/03