Dynamic Braking - WEG CFW501 Serie Manual Del Usuario

Installation and Connection

3.2.3.3 Dynamic Braking

NOTE!
The dynamic braking is available from frame B.
Refer to table B.1 for the following specifications of the dynamic braking: maximum
current, resistance, effective current (*) and cable gauge.
Input power
supply
Command
power supply
(*) The effective braking current can be calculated as follows:
t
(min)
I = I .
br
effective max √
5
seeing that: t corresponds to the sum of the braking actuation times during the most
br
severe cycle of five minutes.
The power of the brake resistor must be calculated considering the deceleration time,
the inertia of the load and of the resistive torque.
14 | CFW501
Contactor
Relay
Thermostat
Figure 3.2: Installation of brake resistor
R
S
T
BR +Ud
Brake
resistor