FR-PVMG-SHTPA /FR-PVMG-SHTPT Shunt Trip Power Unit
Symbol
Definition of the symbol
PV+、PV-
PV DC bus power supply terminals
NC
No connection
FG
Field Ground terminal
RA、RB
Drive terminal from main unit
L+,L-
Drive Out terminal, wire to shunt trip coil, the level is 25VDC, max
power is 80W in 10ms
Earth connection
The FG terminal of the FR-DCMG main unit and power unit must be connected to the
field ground otherwise the communication will be disturbed, and the reliability of the
device will decrease. The FG terminal must connect to the nearby earth ground and the
wire that connects FG terminal to bottom board of the combiner box should not be longer
than 15cm, less than 10cm is great and the wire should be coarse enough. The bottom
board of the combiner must connect to the field ground.
