Residual Current Circuit Breaker (RCCB) is a device containing a mechanical switch to
disconnect a circuit when it detects a current difference between the live and the neutral
wire
[1]
. Under normal condition, the current in the live wire and the returning current from
the neutral wire is the same
[2]
. The current difference, called Residual Current, is often
caused by leakage current (mostly due to old or damaged insulation of equipment) owing
to the ground through a conductive path such as a human body. The Residual Current is
used to disconnect the circuit in the RCCB according to their residual current rating design.
Figure 1.0 shows the components of a RCCB while Figure 2.0 shows the pole types,
residual current trip sensitivity rating, and type of RCCB available in the market.
What is RCCB?
Scan here to watch a
video on "How RCD
(RCCB) works* "
HIOKI Memory HiCorder MR8880
For Troubleshooting RCCB Failure
In TL Inverter Solar PV System
Due To DC Backow
Hioki AC Clamp Power Meter
CM3286-01
Hioki Memory HiCorder
MR8880-20
Application Note
Figure 1.0 Components of a RCCB
Figure 2.0 RCCB pole type, residual current trip sensitivity rating and type
Connection Terminals
Permanent
Magnet Relay
Electromagnetic
Release
Pre-arranged
resister
Operating
Toggle
Operating
Mechanism
Differential
Current
Transformer
Moving
Contacts
Connection
Terminals
Application Note :
HIOKI MEMORY HiCORDER MR8880 fOR TROUBLESHOOTING rccb failure
in tl inverter solar pv system due to dc backflow