WEG CFW700 User Manual - page 22
CFW700 | 17
Installation and Connection
E
ng
lis
h
Power
supply
Thermostat
Braking
resistor
Thermal
relay
Control power
supply
Contactor
CFW700
BR
DC+
R
S
T
Figure 3.3: Connection of the braking resistor
(*) The effective braking current can be calculated as follows:
I
effective
=
I
max
. √t
br
(min)
5
3.2.3.3 Output Connections
ATTENTION!
The inverter has an electronic motor overload protection that shall be adjusted
according to the driven motor. When several motors are connected to the
same inverter, install individual overload relays for each motor.
The motor overload protection available for the CFW700 is in accordance
with UL508C as per the following information:
- "Trip" current equal to 1.25 times the motor rated current (P0401) adjusted
in the "Oriented Start-up" menu.
- The maximum value of P0398 (Motor Service Factor) is 1.15.
- Parameters P0156, P0157 and P0158 (Overload Current at 100 %,
50 % and 5 % of the rated speed, respectively) are automatically adjusted
when the parameters P0401 (Motor Rated Current) and/or P0406 (Motor
Ventilation) are changed on the “Oriented Start-up” menu. If the parameters
P0156, P0157 and P0158 are set manually, the maximum allowed value
is 1.05 x P0401.