Hpi TYPE RCDs

^{RCD performance data}

FOR SPECIFIC APPLICATIONS

Hpi type RCDs have additional immunity
to false tripping which is much higher
than the level required by the standard
and detect residual currents with AC and
DC components (A type). They operate at
temperatures of -25°C to + 40°C and are
used in the following special cases:
- When loss of data would be detrimental:
such as computer equipment power
supply lines (banks, military
instrumentation, airline reservation
centre, etc)
- When loss of operation would be
detrimental (automated machines,
medical instrumentation, freezer
line, etc)
- Places where there is a high risk of
lightning strike
- Sites subject to considerable
interference (use of fluorescent lights,
etc)
- Sites with very long lines