Specified Application; Standard Operation; Abnormal Operation - KEB COMBIVERT R6-S Instruction Manual

3.5 Specified application
The COMBIVERT R6-S serves exclusively for the supply of frequency inverters with DC input
and/or regeneration of excess energy into the supply system. The operation of other electrical
consumers is prohibited and can lead to malfunctions or to the destruction of the units.
The used semiconductors and components of KEB are developed and dimensioned for the
use in industrial products. If the product is used in machines, which work under exceptional
conditions or if essential functions, life-supporting measures or an extraordinary safety step
must be fulfilled, the necessary reliability and security must be ensured by the machine build-
er. The operation of our products outside the indicated limit values of the technical data leads
to the loss of any liability claims.
All output functions of the R6 are "one-channel according to ISO 13849, no diagnostic cover-
age and therefore not safe." If required, additional protective measures must be met by the
user.
3.5.1

Standard operation

If the DC link voltage increases to a value above the peak value of the mains voltage (nega-
tive power), regeneration of the current into the mains occurs automatically. The regenera-
tive level is defined with parameter CP.34 or cS.02. The mains voltage is analog measured.
Regeneration is carried out in square-wave, whereby the current flow period is corresponding
to the times of a B6 bridge circuit. Regeneration is completed if the regenerative and puls off
level (CP.32 or cS.06) is fallen below.
3.5.2

Abnormal operation

When exceeding the permissible limit values for voltage, current or temperature the current
flow between DC link and mains is blocked during regeneration. An appropriate error mes-
sage is also displayed during supply. The unit must be disconnected from the supply system
or the load must be switched off in case of overcurrent or overload. This can be done by
opening the control release of the frequency inverter.
At factory setting the modulation is switched off in case of a net phase failure and error mes-
sage E.nEt is displayed.
Special adjustments from KEB are necessary if the modulation and/or the standard operation
should start again within a defined time in case of return of power supply.
Introduction
GB - 59