24

Presentation,

references

Variable speed drives

Altivar Machine ATV320

Option: braking resistors

VW3A7608Rpp

Presentation:

page 4

Variable speed drives:

page 12

Combinations:

page 22

Dimensions:

page 44

Presentation

Braking resistors allow Altivar Machine ATV320 drives to operate while braking to a standstill or during slowdown

braking, by dissipating the braking energy. They enable maximum transient braking torque.

Depending on the drive rating, the following types of resistor are available:

b

Enclosed model (IP 20 casing) designed to comply with the EMC standard and protected by a temperature-

controlled switch

b

Enclosed model (IP 65 casing) with cordset

Note: To optimize the size of the braking resistor, the DC buses on Altivar Machine ATV320 drives in the same application can be

connected in parallel (see page 14).

Applications

Machines with high inertia, driving loads, and machines with fast cycles.

References

For drives

Ohmic value

Average power

available at

50 °C/122 °F (1)

Length of

connection

cable

Reference

Weight

W

W

m/ft

kg/lb

IP 20 resistors

ATV320U02Mpp,

ATV320U04Mpp,

ATV320U04N4p...U30N4p,

ATV320U07S6C...U40S6C

100

100

–

VW3A7730

1.500/3.307

ATV320U06Mpp...U15Mpp,

ATV320U40N4C,

ATV320U40N4B,

ATV320U55N4B,

ATV320U55S6C

60

160

–

VW3A7731

1.800/3.968

ATV320U22Mpp,

ATV320U30M3C,

ATV320U75N4B,

ATV320D11N4B,

ATV320U75S6C,

ATV320D11S6C,

ATV320D15S6C

28

300

–

VW3A7732

2.700/5.952

ATV320U40M3C,

ATV320U55M3C,

ATV320D15N4B

16

960

–

VW3A7733

3.800/8.377

ATV320U75M3C

10

960

–

VW3A7734

4.300/9.480

ATV320D11M3C

8

960

–

VW3A7735

18.000/39.683

ATV320D15M3C

5

1900

–

VW3A7736

1.500/3.307

(1) Load factor for resistors: the value of the average power that can be dissipated at 50 °C/122 °F from the resistor into the casing

is determined for a load factor during braking that corresponds to the majority of normal applications:

- 2 s braking with a 0.6 Tn braking torque for a 40 s cycle

- 0.8 s braking with a 1.5 Tn braking torque for a 40 s cycle