Rockwell Automation M3575TL User Manual

Snubber Braking Kits for A C Drives

Enclosed Resistor Modules, Enclosed Transistor Modules

Model Numbers

M3575RH__, M3575RL__, M3575TH__, M3575TL__

Instruction Manual D2-3439-1

ATTENTION:Only qualified electrical personnel familiar with the construction and operation of

this equipment and the hazards involved should install, adjust, operate, and/or service this

!

Product Description

Snubber Braking kits connect to 230 VAC and 460 VAC GV3000/SE, SP120, SP500, and VSM500 drives.
These kits dissipate the power regenerated by the motor during rapid deceleration or during overhauling load
conditions.

The regenerated energy is normally consumed, as shown in figure 1, by mechanical loss, by the motor, and by

the drive. The remaining energy is stored in the drive’s DC bus capacitor. If the remaining energy causes the
capacitor voltage to rise above the normal operating range, the Braking Unit will discharge the regenerated
energy before the drive voltage becomes excessive.

equipment. Read and understand this manual and other applicable manuals in their entirety
before proceeding. Failure to observe this precaution could result in severe bodily injury or loss
of life.

Energy

Regenerated

by t h e Moto r

Consumption
by Mechanical

Loss

Consumption
in th e Mo to r

Itself (approx.
10 to 20% of
Output

Figure 1 – Dissipation of Energy Regenerated by the Motor

Consumption
by the Drive

Itself

Storage in

Capacitor of

the Drive

Discharge of

Regenerated

Energy at

Braking Unit

Power resistors are used to dissipate the energy. When the DC bus voltage rises above normal level, either a
built-in transistor (in GV3000/SE bookshelf drives) or an external transistor (used with NEMA-type GV3000/SE,
SP500, and VSM500 drives) automatically switches the dynamic braking resistors on in
pulse-width-modulation (PWM) mode to absorb the excess energy. The transistor is turned fully on at 375 VDC
for 230 VAC input drives and at 750 VDC for 460 VAC input drives. The snubber resistors are sized to provide
the power dissipating capability required for the duty cycle of the application.

Snubber Braking Kits for AC Drives

1

Snubber Braking kits are available:

• as an Enclosed Resistor module for use with an AC drive containing a built-in transistor switching circuit

(such as the GV3000/SE Bookshelf AC drive) or for use in conjuction with an enclosed transistor module
(M/N M3575T__)

• as an Enclosed Tr ansistor module (M/N M3575T__) for use with AC drives that do not contain a built-in

transistor switching circuit and for use with the enclosed resistor modules (M/N M3575R__)

Note that all of the Enclosed Resistor modules and Enclosed Transistor modules are rated for a maximum
on-time of 60 seconds at a specified duty cycle (see tables 1, 2, 5 and 6).

For GV3000/SE Bookshelf drives: Refer to tables 1, 2, and 3 to ensure that the Enclosed Resistor kit
matches your drive.

For AC Drives requiring both an Enclosed Resistor kit and an Enclosed Transistor kit: Refer to tables 4,
5, and 6 to ensure that the braking kits match your drive and your braking horsepower requirements.

Snubber Resistor Kits (M3575RH__, M3575RL__)

The figure below depicts the breakdown of the Snubber Resistor kit part number.

M3575R H 2 M F

Base Model Number
AC Voltage Rating

L = 230 VAC
H = 460 VAC

Horsepower Rating
Chassis Style

B = Bookshelf Style
M = Mini (Standard Enclosed S t y le)
G = Grid Resistors (G1, G2, G3)

Cooling Option
F = Internal Fan

Enclosed Resistor Braking Unit Fault Outpu t

Enclosed Resistor Braking units have one normally-closed contact (NC) rated at 1 amp @ 24 VDC or

0.5 amp @ 115 VAC that opens on an overtemperature fault condition ( 85 C or higher).

2

Enclosed Resistor Modules, Enclosed Transistor Modules

Tables 1 and 2 show the rating data for the Enclosed Resistor Braking kits.

Table 1 – Enclosed Resistor Braking Kit Ratings (230 VAC)

Braking Kit

Model Number

M3575RL1M

Braking

HP

1 6%

M3575RL1MF
M3575RL2M

2 6%

M3575RL2MF
M3575RL3B

3 6%

M3575RL3BF
M3575RL3M

36%

M3575RL3MF
M3575RL4M

4 6%

M3575RL4MF
M3575RL5B

56%

M3575RL5BF
M3575RL6M

6 6%

M3575RL6MF
M3575RL8B

86%

M3575RL8BF
M3575RL9M

9 6%

M3575RL9MF
M3575RL11B

11 6%

M3575RL11BF
M3575RL16B

16 6%

M3575RL16BF
M3575RL24B

24 6%

M3575RL24BF

1.

Maximum on-time is 60 seconds.

Braking

Duty

Cycle

20%

20%

20%

20%

20%

20%

20%

20%

20%

20%

20%

20%

Braking Watts

1

746 50

Max.
Amp

Rating

2 190 M4

Load

Ohms

±10%)

(

Enclosure

TypePeak Continuous

150

1492 100

4 95 M4

300

1989 100

5 75 B4

400

2238

150

6 63 M4

450

2984 200

8 48 M7

600

3979 200

10 38 B4

800

4476 300

12 32 M7

900

5968 300

15 25 B4

1200

6714 450

18 21 M10

1350

7967 400

20 19 B7

1600

11936 600

31 13 B7

2400

17904 900

47 8 B10

3600

Enclosed Resistor Modules, Enclosed Transistor Modules

3

Table 2 – Enclosed Resistor Braking Kit Ratings (460 VAC)

Braking Kit

Model Number

M3575RH1M
M3575RH1MF

M3575RH2M
M3575RH2MF

M3575RH3M
M3575RH3MF

M3575RH4M
M3575RH4MF

M3575RH5B
M3575RH5BF

M3575RH6M
M3575RH6MF

M3575RH8B
M3575RH8BF

M3575RH9M
M3575RH9MF

Braking

HP

1 6%

2 6%

3 6%

4 6%

5 6%

6 6%

8 6%

9 6%

Braking

Duty

Cycle

20%

20%

20%

20%

20%

20%

20%

20%

Braking Watts

1

746 50

1492 100

2238 150

2984 200

4000 250

4476 300

6000 350

6714 400

150

300

450

600

800

900

1200

1350

Max.
Amp

Rating

Load

Ohms

±10%)

(

Enclosure

1 780 M4

2 390 M4

3 260 M4

4 195 M7

5 150 B4

6 130 M7

8 90 B4

9 87 M10

TypePeak Continuous

M3575RH11B
M3575RH11BF

M3575RH16B
M3575RH16BF

M3575RH24B
M3575RH24BF

11 6%

20%

16 6%

20%

24 6%

20%

8000 450

1600

12000 700

2400

18000 1000

3600

11 60 B7

16 45 B7

24 30 B10

M3575RH50G1F 50 20% 40000 8000 53 14 G1
M3575RH100G2F 100 20% 80000 16000 106 7 G2
M3575RH150G3F 150 20% 120000 24000 159 5 G3

1.

Maximum on-time is 60 seconds.

4

Enclosed Resistor Modules, Enclosed Transistor Modules

Table 3 shows the acceptable matches, by braking horsepower, between GV3000/SE Bookshelf drives and

Enclosed Resistor Braking kits. For actual sizing information, refer to “Selecting and Sizing Snubber Braing
Resistors” on page 18 of this manual.

Table 3 – Matching Enclosed Resistor Braking Kits with GV3000/SE Bookshelf Drives

GV3000/SE

Can use snubber resistor kits rated at the following braking HP

Bookshelf Drive

Model Number

Volts/Hertz Vector

31ER/31ET4060 1 HP to 3 HP 1 HP to 2 HP
38ER/38ET4060 1 HP to 4 HP 1 HP to 3 HP
55ER/55ET4060 1 HP to 4 HP 1 HP to 4 HP
85ER/85ET4060 1 HP to 6 HP 1 HP to 6 HP
126ER/126ET4060 1 HP to 9 HP 1 HP to 6 HP
150ER/150ET4060 1 HP to 9 HP 1 HP to 8 HP
240ER/240ET4060 1 HP to 11 HP 1 HP to 11 HP
300ER/300ET4060 1 HP to 16 HP 1 HP to 16 HP
430ER/430ET4060 1 HP to 24 HP 1 HP to 24 HP

Enclosed Resistor Modules, Enclosed Transistor Modules

5

Sized for 1/4” Bolts or Studs

Enclosure

Type

M3 323,8

M4 323,8

M7 323,8

M10 323,8

B4 450,8

B7 450,8

B10 450,8

.75

A

E

G

F

Terminal Strip

.28 .28

1.00

A BCDEFGH

(12.75)

(12.75)

(12.75)

(12.75)

(17.75)

(17.75)

(17.75)

D

76,2
(3.0)

101,6
(4.0)

177,8
(7.0)

254
(10.0)

101,6
(4.0)

177,8
(7.0)

254
(10.0)

B

Dimension in mm (in)

95,6
(7.70)

95,6
(7.70)

95,6
(7.70)

95,6
(7.70)

95,6
(7.70)

95,6
(7.70)

95,6
(7.7)

n/a 304,8

44,5
(1.75)

127
(5.0)

203,2
(8.0)

44,5
(1.75)

127
(5.0)

203,2
(8.0)

C

H

(12.0)
304,8

(12.0)
304,8

(12.0)
304,8

(12.0)
425,5

(16.75)
425,5

(16.75)
425,5

(16.75)

266,7
(10.5)

266,7
(10.5)

266,7
(10.5)

266,7
(10.5)

381
(15.0)

381
(15.0)

381
(15.0)

28,7
(1.13)

28,7
(1.13)

28,7
(1.13)

28,7
(1.13)

35,1
(1.38)

35,1
(1.38)

35,1
(1.38)

221
(8.7)

221
(8.7)

221
(8.7)

221
(8.7)

221
(8.7)

233,7
(9.2)

246,4
(9.7)

Figure 2 – Resistor Braking Kit Enclosure Dimensions

6

Enclosed Resistor Modules, Enclosed Transistor Modules