EC&M AC Crane Control

FRONTLINE ® AC CRANE CONTROL

CLASS  

August, 2012

RESISTOR SELECTION FOR AC CRANE CONTROL SYSTEMS A set of TABWELD ® resistors are required for each AC motion control system. The following table is for selecting resistors for all AC motor crane control applications. RESISTOR APPLICATION

CLASS 6715 TYPE TW RESISTOR

For resistors mounted in racks, unwired – refer to Class 6715. Class 151 and 152 is recommended for light crane duty. Class 161 and 162 is recommended for standard duty. Class 171 and172 is recommended for severe duty. For explanation of NEMA resistor classifications – refer to Class 6715 catalog

CLASS 6715 RESISTORS TYPE NUMBER SELECTOR*

Class 6715

A2 G 37K C 5

4 4 D 350V 67A

Controller Type Enclosure Motor Power

NEMA Class Speed Points System Voltage Motor Rated Voltage Motor Configuration Rotor Volts Rotor Amps

* This Type Number Selector provides a complete resistor set Type Number to allow part number creation. These Type Numbers are not part numbers. EXAMPLE: ABOVE AC RESISTOR SET The above Resistor Type Number Selector code describes a set of resistors for a duplex CONTRA  -TORQUE hoist (2 motors in parallel), NEMA 161 rated duty cycle, 5 speed points, system & motor voltage applied at 460VAC, 37kW, enclosed in NEMA 1 style rack(s), with rated rotor voltage of 350V and rated rotor current of 67A. CLASS 6715 RESISTOR TYPE NUMBER SELECTOR CODES

Speed Points No.

Motor Rated Voltage

Motor Rating

System Voltage

Motor Configuration

Controller Class

Enclosure

NEMA DUTY

Rotor

Rotor

Control Scheme

Code

Type

Code Code

Class

Code Code

V Code V Code

Type

Code

A0 A1 A2 A6

A B C D E F G H

6420 6421 6422 6426

151 152 161 162 171 172

N

3

None

2

2

208

208

“#H” (HP)

S

Simplex

O

4

Open

3

3

380

380

Amps

Volts

A7

G

5

6435 Hoist

NEMA 1

D

Duplex

91 92

“#K” (kw)

A8

W

4

4

6

6435 Travel

NEMA 3R

460

460

Q

Quadruplex

Customer Design

NEMA 1 w/ Screen Covers

A99

C

CS

7

5

5

Customer Design

575

575

20