Configuration Of The Brake Resistor - Eurotherm 637+/D6R KD6R Product Manual

Electrical installation
Brake resistor
Selection of the brake resistor
Step 2
Internal / external Brake-resistor required ?
see data in chapter 1.3.3 / 1.3.4
In case of unsufficient capability or not included
internal Brake-Resistor, a type may be selected from the
following list
External and internal Brake-Resistors will be switched
in parallel. The internal and external performance-Data
may be added in this case.
Selection guide
external Brake-
xD6Rxx.S3-3
resistors
xD6Rxx.S3-7
Overload-Capability: approx. 5000% / 0,5 Sec

5.8.2 Configuration of the brake resistor

Possible ballast circuit configurations at digital devices
a) Compact design
The plug-in modules of servo-control series 635 / 637 are provided with an on board ballast
electronics.
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
relevant then.
r.g. a) Adjustment of ballast circuit for compact units:
In this case the ballast electronics of the plug-in module will be activated."Ballast aktiviert = J".
The operating point has to be adjusted depentent on the voltage variant.
"Ucc Ballast Ein = 375 V"
"Ucc Ballast Ein = 720 V"
As resistance value, the parallel resistance from internal and external resistance
has to be adjusted.
e.g. "Ballastwiderstand = 300 Ohm"
"Ballastwiderstand = 75 Ohm"
As ballast power (braking energy), the sum total of internal and external resistor power
has to be adjusted.
e.g. "Ballastleistung = 30 Watt"
"Ballastleistung = 130 Watt"
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 Eurotherm 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 feeded directly.
52
Drive -Type Ub-Setpoint
DC 375 V
DC 375 V
DC 375 V
DC 730 V
DC 730 V
DC 730 V
It is intended for application as compact unit KDER resp. KD6R.
parameter "Ballast aktiviert = N". All further ballast parameters are no longer
Product-manual Model: 637+/D6R KD6R
Example-Drive model
Peak Power Pmax = 1700W
Pd = 9,3W Pmax = 405W
Result: The internal capability is sufficient
Pmax ext [W] Pd ext [W]
4260
100
17150
300
17800
560
5330 100
16150
300
20400
560
for 230 V AC supply
for 400..460 V AC supply
for KD6R-10-7 (internal resistance only)
for KD6R-10-7 (+ external 100 Ohm / 100 W)
for KD6R-10-7 (internal resistance only)
for KD6R-10-7 (+ external 100 Ohm / 100 W)
07-02-09-01-E-V0402.doc
637+/K D6R04-7
acc. to data in 1.3.3:
internal resistor:
Cont. Power Pd = 30W
Required:
Rb ext [Ohm] Eurotherm-model
33
8,2
7,9
100 B100/100-6
33
26
B100/33-3
B300/8,2-3
B560/7,9-3
B300/33-6
B560/26-6