WEG CFW-11 Programming Manual page 72

Inverter Model and Accessories Identification
Description:
Refer to the allowed current for switching frequencies different from the default, in the tables available in chapter 8
of the CFW-11 User Manual.
The inverter switching frequency can be adjusted according to the needs of the application.
Higher switching frequencies imply in lower motor acoustic noise, however, the selection of the switching frequency
results in a compromise between the motor acoustic noises, the losses in the inverter IGBTs and the maximum
allowed currents.
The reduction of the switching frequency reduces effects related to motor instability, which occur in specific application
conditions. It also reduces the earth leakage current, being able to avoid the actuation of the faults F074 (Ground
Fault) or F070 (Output Overcurrent/Short Circuit).
Note: The option 0 (1.25 kHz) is only allowed for the V/f or VVW control (P0202=0, 1, 2 or 5).
P0298 – application
Adjustable
Range:
Proprieties:
Access groups
via HMI:
Description:
Set the content of this parameter according to the application.
The Normal Duty Regimen (ND) defines the maximum current for continuous operation (I
of 110 % during 1 minute. It must be used for driving motors that are not subject in that application to high torques
in relation to their rated torque, when operating in permanent regimen, during start, acceleration or deceleration.
The Heavy Duty Regimen (HD) defines the maximum current for continuous operation (I
of 150 % during 1 minute. It must be used for driving motors that are subject in that application to high
overload torques in relation to their rated torque, when operating in constant speed, during start, acceleration or
deceleration.
The I and I
nom-ND nom-HD
regarding these operation regimens.
6
6-8
0 = Normal Duty (ND)
1 = Heavy Duty (HD)
CFG
01 PARAMETER GROUPS
42 Inverter Data
are presented in P0295. Refer to the CFW-11 User Manual chapter 8 for more details
Factory 0
Setting:
) and an overload
nom-ND
) and an overload
nom-HD