EC&M Crane Control Class 6121

Crane Control Class 6121 Pricing Information and Application Data

BRIDGE OR TROLLEY SERVICE A complete set of motor control equipment consists of a controller, separately mounted Tab-Weld ® resistors, and a master switch. The following tables are for selecting the resistors and master switches used with Class 6121 Bridge or Trolley controllers.

Tab-Weld ® Resistor Selection Table ★ †

Price

Price Additions

Without Armature Shunt

Maximum HP Rating Single Motor ■

Continuous Duty Slowdown Resistor ▲

NEMA Class ●

162-P

172-P

2862 . 2862 . 2862 . 3804 . 3804 . 3804 . 3924 .

2862. 2862 . 3840 . 3840 . 4122 . 4914 .

2610 . 2970 . 3330 . 4050 . 5760 . 6796 .

5

CRANE CONTROL CLASS 6121

7-1/2

Class 6715 Tab-Weld ® Resistor

10

15 20 25 30 35 40 45 50 60 65 70 75

5688 . 6444 . 7182 . 8010 . 8622 . 10422 . 11196. 12060 . 12744 . 15192. 16722 . 22338 . 24696 . 32634 .

7380 . 8010 . 8910 .

4446 . 4950 . 5526 . 5940 . 7182 . 7722 . 8316 . 8784 . 10476 . 11538 . 15408. 17028 . 22500 .

9810 .

10800 . 11790 . 13680 . 19350 . 20430 . 23130 . 24120 .

90

100 135 150 200

. .. . .. . ..

Class 9004 Type CG12 Master Switch

★ It is recommended that bridge or trolley resistors be selected based on the 1 hour motor horsepower rating unless specified otherwise. † For resistors mounted in racks, refer to Class 6715. ■ Duplex controllers require two sets of resistors, one set for each motor. ● Class 162 is recommended for standard crane duty. Class 172 is recommended for severe crane duty. For explanation of NEMA Resistor Classifications, refer to Class 6715 Application Data. Consult factory for other NEMA Classes. ▲ Slowdown resistors are designed to limit Bridge drives to approximately 50% of their present free running speed. Complete motor nameplate data plus the free running current drawn by the motor must be provided to design the slowdown resistors.

Master Switch Selection Table

Class 9004 VM or CM NEMA 1 Enclosed

VM

CM

Drive

Speed Points Control Type

Type

Price

Type

Price

4758 . 4758 .

5460.

5

U

VG9

CG8

...

Bridge or Trolley

6

U

VG9

...

CG12 6426 .

...

6v

U

...

Modifications

Price Addition

Description

Optional Feature Form Letter

VM

CM

Class 9004 Type VG12 Master Switch

888 .

888 .

Spring Return to Off Point

S

Accessories Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see Class 5010 or 5015 Adjustable Torque Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Class 5060 Manual-Magnetic Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see Class 6140

47

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