SMA STP 50-40 - Page 121

13 Technical Data
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 121
Rated grid frequency 50Hz
Grid frequency
3)
50 Hz / 60 Hz
Operating range at grid frequency 50Hz 44Hz to 55Hz
Operating range at grid frequency 60Hz 54Hz to 65Hz
Power factor at rated power 1
Displacement power factor, adjustable 0.0overexcitedto0.0underexcited
Feed-in phases 3
Connection phases 3 (+1)
Overvoltage category as per IEC 62109-1 III
Multifunction relay
Maximum DC switching voltage 30V
Maximum AC switching current 1.0A
Maximum DC switching current 1.0A
Minimum load 0.1W
Minimum electrical endurance when the maxi-
mum switching voltage and maximum switching
current are complied with
4)
100000 switching cycles
Efficiency
Maximum efficiency, η
max
> 98.1%
European weighted efficiency, η
EU
> 97.8%
Protective devices
DC reverse polarity protection Short-circuit diode
Input-side disconnection point DC load-break switch
5)
DC overvoltage protection Surge arrester type1 and 2 (optional)
AC short-circuit current capability Current control
Grid monitoring SMA Grid Guard 10.0
Maximal output overcurrent protection 100A
Ground fault monitoring Insulation monitoring: R
iso
>34kΩ
All-pole sensitive residual-current monitoring unit Available
Active anti-islanding method Frequency shift
4)
Corresponds to 20years at 12switching operations per day
5)
Usage category according to IEC60947: DC-PV2