Eurotherm 637+/D6R KD6R, Product Manual

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Product-manual Model: 637+/D6R KD6R 07-02-09-01-E-V0402.doc
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
Example-Drive model
637+/K D6R04-7
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.
acc. to data in 1.3.3:
internal resistor:
Cont. Power Pd = 30W
Peak Power Pmax = 1700W
Required:
Pd = 9,3W Pmax = 405W
Result: The internal capability is sufficient
Selection guide Eurotherm-model Pd ext [W] Rb ext [Ohm]
B100/33-3
100 33
B100/100-6 100 100
B300/8,2-3 300 8,2
B300/33-6 300 33
B560/7,9-3
560
7,9
B560/26-6 560 26
Ub-Setpoint
DC 375 V
DC 375 V
DC 375 V
DC 730 V
DC 730 V
DC 730 V
Pmax ext [W]
4260
17150
17800
5330
16150
20400
external Brake-
resistors
Drive -Type
xD6Rxx.S3-3
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.
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 aktiviert = N". All further ballast parameters are no longer
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"
for 230 V AC supply
"Ucc Ballast Ein = 720 V" for 400..460 V AC supply
As resistance value, the parallel resistance from internal and external resistance
has to be adjusted.
e.g. "Ballastwiderstand = 300 Ohm" for KD6R-10-7 (internal resistance only)
"Ballastwiderstand = 75 Ohm" for KD6R-10-7 (+ external 100 Ohm / 100 W)
As ballast power (braking energy), the sum total of internal and external resistor power
has to be adjusted.
e.g. "Ballastleistung = 30 Watt"
for KD6R-10-7 (internal resistance only)
"Ballastleistung = 130 Watt" for KD6R-10-7 (+ external 100 Ohm / 100 W)
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.