Installation manual

© 2014 EcoInnovation Ltd (NZ) Page 45
5.3.3. Klampit "crowbar" protection circuits (optional)
A Klampit is a proprietary safety device that short circuits the
PowerSpout at a pre-set voltage. Shorting the turbine does not
harm it, but removes the dangerous voltage until the Klampit is
manually reset (usually by stopping the turbine). This type of
device is called a crowbar circuit and is given the abbreviation “C”
in the turbine product name. You may or may not need to use one.
There are 3 options:
PLT/TRG Turbine
designation
Klampit
crowbar
voltage
statutory significance
Used with
56C
75 VDC
ELV in many
countries
direct connection to
48-volt battery at ELV
100C
120 VDC
Or
140 VDC
ELV in some
countries (NZ and
Australia)
MPPT controllers up to
150 VDC
170/200C
240 VDC
LV
("Low" voltage)
MPPT controllers up to
250 VDC
Note - 140 VDC Klampit are normally installed in turbines for delivery outside Australasia.
5.3.4. PowerSpout PLT versions
Common versions of PowerSpout PLT with no overvolts crowbar
Off-grid*
On-grid
PLT model
14
28
40
56
80
170
200
Max cable length m
50
150
250
500
1000
1000
1000
MPPV
14
28
40
56
80
170
200
Max open circuit V
38
75
120
ELV
NZ/AUS
150
220
<450
<550
Controller/inverter
PWM
PWM
MPPT
PWM
MPPT
Grid-tie
Grid-tie
* PWM signifies direct connection to battery with diversion load control. All off grid MPPT
turbines can charge 12, 24 or 48 V battery bank except PLT40 which can only be used in 12
and 24 V systems.
Common versions of PowerSpout PLT with overvoltage protection fitted
Off-grid
48-v battery
75vdc crowbar
Off-grid
120vdc
crowbar
Off-grid
240vdc crowbar
On-grid
Aurora PVI wind interface
PLT model
56C
100C
170C
200C
350
Max cable length m
500
1000
1000
1000
1000
MPPV
56
100
170
200
250-350
Max open circuit V
<75
<120
<240
<240
<400
Controller/inverter
PWM
MPPT
MPPT
MPPT
Grid-tie