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2 GENERAL INSTRUCTIONS
2.1 ABOUT THE MANUAL
This manual presents how to install, to start-up, the main characteristics and how to troubleshoot the most common
problems of the CFW-11 RB converter series.
For information on other functions, accessories and operation conditions please refer to the following manuals:
Programming Manual, with a detailed description of the parameters and advanced functions of the CFW-11 RB.
„
I/O Expansion Module Manual.
„
These manuals are available for download on the website: www.weg.net.
2.2 TERMS AND DEFINITIONS USED IN THE MANUAL
Regenerative Frequency Converter: three-phase switching frequency converter "boost type" (amplifier) that
converts the AC voltage from the power supply to a DC voltage (DC Link). It has the capability of absorbing the
energy of the power supply (AC) or to recover the energy back to the power supply, being used as a DC voltage
source to supply voltage to several output inverter.
Output Inverter: frequency inverter fed by the DC Link bus bar supplied by the regenerative converter. It is
responsible for the motor control.
Normal Duty Cycle (ND): converter duty cycle that defines the maximum continuous operation current (Inom-ND)
and overload current conditions (110 % for 1 minute). The ND cycle is selected by setting P0298 (Application) = 0
(Normal Duty (ND)). The inverter overload conditions are reflected in the regenerative converter.
I
: converter rated current for use with the normal duty (ND) cycle. Overload: 1.1 x I
nom-ND
Heavy Duty Cycle (HD): converter duty cycle that defines the maximum continuous operation current (Inom-HD)
and overload current conditions (150 % for 1 minute). The HD cycle is selected by setting P0298 (Application) = 1
(Heavy Duty (HD)). The inverter overload conditions are reflected in the regenerative converter.
I
: converter rated current for use with the heavy duty (HD) cycle.
nom-HD
Overload: 1.5 x I
/ 1 minute.
nom-HD
Pre-charge Circuit: charges the DC Link capacitors with limited current, which avoids higher peak currents at
the converter power-up.
Link DC: converter intermediate circuit; DC voltage obtained from the AC input voltage rectification or from an
external power supply; feeds the output IGBTs converter bridge.
Power Modules U, V, and W: set of two IGBTs of the regenerative converter input phases U, V, and W.
IGBT: Insulated Gate Bipolar Transistor; basic component of the power modules U, V and W. The IGBT works as
an electronic switch in the saturated (closed switch) and cut-off (open switch) modes.
NTC: resistor which resistance value in ohms decreases proportionally to the temperature increase; used as a
temperature sensor in power modules.
HMI: Human Machine Interface: it is a device that allows the visualization and modification of the converter
parameters. The CFW-11 RB HMI presents keys for the regenerative converter control, navigation keys and a
graphic LCD display.
Flash Memory: non-volatile memory that can be electronically written and erased.
Ram Memory: Random Access Memory (volatile).
General Information
/ 1 minute.
nom-ND
CFW-11 RB | 2-1
2
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