User manual

SETTINGS
14 July 2012 / WPC / EN
7.2.3
Allow to overrun the maximum input current of the AC source
“Overrun AC source current limit without opening the transfer relay (Input limit)” {1436}. This
parameter is set at “YES”; it means that if the power requested is more than can be delivered by
the Smart-Boost, the AC input grid current will go over the programmed max input limit value. In
case the limit was set to a low value because of low generator speed, it means that more power
will be taken from the generator and it will speed up. Keep in mind however that the generator
output power is limited by the engine power and if more than its max power is used, the generator
will stop on overload.
If a AC grid line (or shore input) is overloaded, the circuit breaker may blow.
Parameter
Name
Default
1436
Overrun AC source current limit without opening the transfer relay
No
For example, the requested output power is 15A. Parameter 1567 is set to 13A. Then 13A will be
delivered by the generator and 2A Smart-boosted byu the inverter. If parameter 1567 is set to 6A,
then 6A will be delivered by the generator and 9A Smart-boosted by the inverter. Now if the
requested output goes up to 25A, the Smart-boost power is limited to 15A and because parameter
1436 is set to ‘Yes’, the power delivered from the generator (or grid input) will be 10A, possibly
blowing a 6A fuse in case of grid input. Would the parameter be set to ‘No’, then the system will
stop on ‘overload’ and a 6A fuse would not be blown.
7.2.4
Automatic selection of AC source
The WPC has an automatic switching AC input on the connection board. If the generator is
running, it is used as the primary AC source. Otherwise the switches will be in the position to allow
AC grid input power. Four situations can occur:
Situation 1:
 Power is delivered from the AC grid (limit set by parameter 1107)
 The battery is automatically charged