GESTRA OR 52-7, Installation Instructions Manual

Page: 13 / 44

3
Electrical Connection
- continued -
Wiring diagram OR 52-7
Fig. 4
Drawn position of contacts: Alarm 1 and 2, separator OFF and voltage failure
Notice
Fig. 4 shows an example where the water will be run back to the ship’s bilge in the event of an alarm
(oil content > 5 ppm) or auxiliary power failure.
With different limit settings alarm contact can, for instance, be used for the first alarm and alarm
contact 2 for the main alarm.
For bilge water monitoring a pneumatic three-way valve can be controlled by the alarm contact 2 via a
solenoid valve. If the turbidity of the effluent is too high (alarm caused by ingress of oil or dirt particles
introduced into the system during start-up) the three-way valve will divert the contaminated water to
the bilge tank. The separation continues until the oil content falls below 5 ppm and the cleaned water
can be discharged overboard.
External wiring Measuring sensor
Disconnecting
switch
External
wiring
Purging valve
to first alarm
Attached in cover
Solenoid valve
Three-way valve
Earthing screw
in housing
PE L N
N
L