Electrical Installation

5

 

 

 

 

Brake resistor

 

 

 

selection of the brake resistor

 

 

 

Step 2

Example-Drive type

 

Internal / external Brake-resistor required ?

637f/K D6R04-7

 

see data in chapter 1.3.3 / 1.3.4

 

 

 

In case of unsufficient capability or not included

acc. to data in 1.3.3:

 

internal Brake-Resistor, a type may be selected from

internal resistor:

 

the following list

Cont. Power Pd = 30W

 

 

Peak Power Pmax = 1700W

 

External and internal Brake-Resistors will be switched

Required:

 

in parallel. The internal and external performance-Data

Pd = 9,3W

Pmax = 405W

 

may be added in this case.

Result: The internal capability is sufficient

 

 

 

 

 

5.8.2Configuration of the brake resistor

Possible ballast circuit configurations at digital devices

a)Compact design

The plug-in modules of servo-control series 635/637/637+/637f are provided with an on board ballast electronics. It is intended for application as compact unit KDER resp. KD6R.

These compact units contain the necessary ballast resistor incl. fuse for the ballast circuit. Except KD6R 16..30-7 (external resistor only).

b)Rack design

While the plug-in modules are used in a rack, the NEB power supply module takes dissipation of the braking energy (adjustment of ballast monitoring: please see NEB manual).

In this case the ballast electronics of the plug-in module will be deactivated with the configuration parameter "Ballast activate = N". All further ballast parameters are no longer relevant then.

r.g. a) Adjustment of ballast circuit for compact units:

1. Ballast electronics activated:

In this case the ballast electronics of the plug-in module will be activated. "Ballast activate = J".

2. Operating point:

The operating point has to be adjusted dependent on the voltage variant.

"Ucc Ballast on = 375 V"

for 230 V AC supply

"Ucc Ballast on = 720 V"

for 400..460 V AC supply

3. Resistance value:

As resistance value, the parallel resistance from internal and external resistance has to be adjusted.

4. Rated power:

As ballast power (braking energy), the sum total of internal and external resistor power has to be adjusted.

Precondition for correct monitoring of shunted ballast resistors is the nearly same ratio of P - cont. power to P - pulse power. This is guarantied with the SSD Drives standard combinations.

..KD6R 16..30-7 units do not contain an internal ballast resistor.

At these versions the values of the external resistor can be feed directly.

________________________________________________________________________________________________________________________________________________________________________________________________________________________

07-02-10-01-E-V0505.doc

Product Manaul Type: 637f

55