Compressor Unit Instruction Manual
ULVAC CRYOGENICS INCORPORATED
B-1
Appendix B
CIRCUIT DIAGRAM
◆
Safety Devices (inside of the controller)
Name
Function and specification
OL
Thermal relay
(AUTO RESET)
This relay is set up in the controller and automatically stops the
compressor if the current flowing in the compressor is higher than
specified value due to overloading, etc. STOP pushing button
(PB1) lights up.
・
Rated current: 14A
CP1
Circuit protector
(MANUAL RESET)
This device shuts off power if any line in the compressor
circuitry is shorted.
・
Rated current: 25A
CP2
Circuit protector
(MANUAL RESET)
This device shuts off power if any line in the refrigerator
circuitry is shorted.
・
Rated current: 1A
PRR
Reverse phase
protective relay
This relay does not allow the compressor to start when the
compressor power wires are connected reverse phase.
◆
Safety Devices (outside of the controller)
Name
Function and specification
TS1
Thermal switch
This switch automatically stops the compressor if the oil flow
rate is insufficient or the compressor is overloaded.
STOP push button (PB1): lights-out
TS2
Thermal switch
This switch is set up on the top of compressor and automatically
stops the compressor if the compressor pump temperature is
excessively high due to overloading, etc.
STOP push button (PB1): lights-out
TS3
Thermal switch
This switch stops the compressor if there is no cooling water
supply or cooling water temperature is excessively high.
STOP push button (PB1): lights-out
Summary of Contents for C15T
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