KEB Combivert R6 Instruction Manual page 34

Operation of the Unit
is released if a phase is missing or in case of phase allocation failure.
The actual mains frequency is determined and the correct connection of the COMBIVERT
R6-S is secured after successful synchronisation. If the control release (terminal ST) is set,
the COMBIVERT R6-S starts independently with the specified operation. Depending whether
regenerative requirement is available, the COMBIVERT R6-S is in status „rEGEn" or „Stb".
Status „Stb"
COMBIVERT R6-S detects a typical voltage level in the DC link circuit of the connected fre-
quency inverter (motor operation) and keeps the modulation signals of the regenerative unit
deactivated.
Status „rEGEn"
The modulation signals are activated and the unit changes into regenerative operation on ex-
ceeding the DC voltage in the DC link (CP.09) more than 103 % of the input voltage. Further
the regenerative unit is switched active, if regenerative operation is requested by an additional
installed COMBIVERT R6-S in the system (master /slave operation).
GB - 35