ST-120-3 9
7 Electrical connection
7.1 Schematic wiring diagrams
The schematic wiring diagrams show the electrical con-
nection of the protection devices in the terminal box of
the compressor or in the switch cabinet of the system.
Detailed schematic wiring diagrams can be found in the
corresponding applications manual:
• SH-100: HS.53..HS.74
• SH-110: HS.85
• SH-500: OS.53 and OS.74
• SH-500: OS.85
Legend for schematic wiring diagram
C1 Electrolytic capacitor
F7 Oil flow switch
F9 Monitoring oil stop valve
F10 Oil filter monitoring
K1T Time relay "Oil supply monitoring" 20s
R1 Oil heater
R2 Discharge gas and oil temperature sensor
Permanently wired
Wired on site
Open drive screw compressors
For OS.53 to OS.85, the following protection devices
must be monitored in the same way as the respective
semi-hermetic compressor:
• The oil flow switch (F7) for OS.53 and OS.74.
• The oil flow switch (F7) and the oil stop valve (F9)
and the oil filter (F10) for OS.85.
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