Brochure

8 | RCD Type F
Maximum protection, in all cases
According to the type of loads to be protected , the level of
safety and the continuity of service, all different RCDs types
could be needed. Pure resistive loads can be protected by
means of RCBOs Type AC or A. In case of critical circuits due to
a high level of peak leakage current like computers networks or
ballasts, RCCBs Type A APR offer the adequate solution.
Cooling systems powered by a single phase inverter requires a
RCD designed to work with current containing higher harmonics
like a RCD-block Type F combined with a correspondent MCB.
Finally a RCCB Type B is installed to protect a line supplying a
three-phase frequency converter driving a motor load.
Example of correct design of RCD protection
in an industrial application
Oven
F type
RCD block + MCB
RCCB
A-APR type
RCCB
F type
MCBs
Extended
lighting systems
Supply
MCBs
Three-phase
frequency converter
ABB
asynchronous motor
RCBO
A-APR type
Extended
computers circuits
RCBO
AC/A type
B type
RCCB
Cooling system
(including single
phase inverter)
Cooling system
(including single
phase inverter)