K1 and K2 - DC installation contactor with auxiliary contact (Fault Ride
Through)
Number of pins 3-pin or 4-pin
(depending on the cabling variant)
Rated current depends on house connection
Coil voltage 24 V
DC
Min. short circuit cur-
rent
3 kA (make contacts)
Test standard IEC 60947-4-1
Auxiliary contact
Number of NC con-
tacts
1
Switching voltage 24 V
DC
Min. nominal current 1 A
Min. short circuit cur-
rent
1 kA
Examples of contact-
ors and relays
Finder 22.64.0.024.4710
K3 - modular relay
Number of changeover
contacts
2
Coil voltage 12 V
DC
Test standard IEC 60947-4-1
Examples of contact-
ors and relays
Finder 22.23.9.012.4000 / Schrack relay RT424012
(bracket RT17017, relay base RT78725)
K4 and K5 - installation contactor
Number of NC con-
tacts
2 (25 A)
Coil voltage 230 V AC (2P)
Rated frequency 50/60 Hz
Coil fuse 6 A
Min. short circuit cur-
rent
3 kA (make contacts)
Test standard IEC 60947-4-1
Examples of contact-
ors and relays
ISKRA IKA225-02
Components for
manual Full
Backup backup
power
changeover
Device name
Current trans-
former Item number
Fronius Smart Meter 63A-3 43,0001,1473
166
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