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Built-in Protection
50
zappi
operation and installation manual
Over-current
If there is a problem with the equipment on the EV which charges the vehicle’s battery, too much current may be
drawn from the supply. If this happens,
zappi
cannot control the charge rate as expected and it could lead to
problems with overheating or tripping the main circuit breaker to the
zappi
.
zappi
provides additional protection in accordance with the EV Ready standard by opening its built-in contactor
and isolating the EV if it detects that the vehicle is drawing more than 125% of the maximum current communicated
to it by the
zappi
.
If
zappi
detects an over-current, then the display will show Over Current!
To reset the
zappi
, make sure that the fault has been removed and then press the
button for three seconds
Over and Under-voltage
zappi
will also isolate the supply to the EV if it detects a problem with the electricity supply voltage. The nominal
supply voltage is 230V but
zappi
will trip the output if the measured voltage is more than 12% above or below this
level for five seconds.
The
zappi
display will show Over Voltage! or Under Voltage!
zappi
, will reset automatically once the voltage returns to the acceptable range (nominally 230V +/-10%)
Thermal Limit
zappi
also includes protection against overheating. If
zappi
gets too warm it will attempt to reduce the current
being drawn by reducing the EV charge rate. If this happens you will see the icon on the main display.
If the problem continues and the
zappi
's internal temperature continues to rise, then it will trip the output to the
EV, and the display will show
Overheating
!
zappi
will resume normal operation once the temperature drops.