It Networks; Dynamic Braking - WEG CFW500 Serie Manual Del Usuario

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Seeing that:
ΔV - desired input power supply drop, in percentage (%).
V - voltage of the phase in inverter input, in volts (V).
e
- inverter output rated current.
I
s, rat
f - input power supply frequency.

3.2.3.3 IT Networks

3.2.3.4 Dynamic Braking

Refer to Table B.1 on page 141
current, resistance, effective current (*) and cable gauge.
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ATTENTION!
When inverters with internal RFI filter are used in IT networks (neuter not
grounded or grounded through a high ohmic value resistor), always set the
grounding switch of the capacitors of the internal RFI filter to the NC position
(as shown in Figure A.2 on page
damage to the filter capacitors of the inverter.
NOTE!
The dynamic braking is available from frame B.
for the following specifications of the dynamic braking: maximum
Contactor
Input power
supply
Command
power supply
Thermostat
Figure 3.2: Installation of brake resistor
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139), since those kinds of network cause
R
S
T
BR
Relay
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Installation and Connection
+Ud
Brake
resistor
CFW500 | 17
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