Control Techniques Unidrive LV Series Installation Manual page 15

Using an RFI filter
S 5 For compliance with the emission
TEP
standards such as EN 50081-1 or EN 50081-2, use
the recommended RFI filter as shown in
Table 2–8. Use one RFI filter for each Drive.
(Standards that are met are specified in
Appendix C Data)
Make a note of this step number and the
following for each filter to be used:
•
Size code or part number
•
Maximum power dissipation figure
•
IP rating
Table 2–8 RFI filter data
Model
Size Part
number
UNI 1201 A 4200–0010
UNI 1202 A 4200–0010
UNI 1203 A 4200–0010
UNI 1204 A 4200–0010
UNI 1205 A 4200–0010
B
UNI 2201 4200–0027
UNI 2202 B 4200–0027
UNI 2203 B 4200–0027
UNI 3201 C 4200–1051
UNI 3202 C 4200–1051
UNI 3203 D 4200–1071
D
UNI 3204 4200–1071
Model size 1
When the motor cable is to exceed 50m (165 feet),
use RFI filter size B (4200–0027).
Unidrive LV model sizes 1 to 3 Installation Guide
Issue code: uliu1
RFI filter
Maximum IP
power rating
dissipation
(W)
25 IP20
25 IP20
25 IP20
25 IP20
25 IP20
40 IP20
40 IP20
40 IP20
60 IP00
60 IP00
100 IP00
100 IP00
Using a braking resistor
Braking occurs when the Drive is decelerating the
motor, or is preventing the motor from gaining
speed due to mechanical influences. During braking,
energy is returned to the Drive by the motor.
When the motor is being braked by the Drive, the
maximum regenerated power that the Drive can
absorb is equal to the power dissipation (losses) of
the Drive.
When the regenerated power is likely to exceed
these losses, a braking resistor must be connected.
By default, the Drive brakes the motor under
PI control which extends the deceleration time as
necessary in order to keep the
voltage. The method of braking can be changed; if
required, refer to Appendix D Menu 0 Parameters in
the User Guide.
Note
When a braking resistor is used, the Drive
should be operated in FASt ramp mode. If
this is not done, instability may arise. See
Braking resistor in Chapter 2 of the User
Guide.
Housing the resistor, and routing the
connecting cable
High temperatures
Braking resistors can reach
high temperatures. Locate
Warning
braking resistors so that
damage cannot result.
Use cable having insulation
capable of withstanding high
temperatures.
Overload protection
It is essential that an overload
protection device is
Warning
incorporated in the braking
resistor circuit; this is
described in Protection circuit
for an optional braking resistor in
S 8.
TEP
Installing the Drive
bus at a constant
DC
2-9