English (GB)
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8.2.4 MP 204
The motor protector MP 204 is an electronic control
unit designed for monitoring and protection of
motors, pumps, machines, cables and cable joints.
The MP 204 monitors the following parameters:
•
System insulation resistance to earth before start
•
Motor temperature (only possible if the motor is
fitted with an operational temperature sensor, for
example a Pt100/Pt1000 or a PTC sensor)
•
Current consumption and unbalance
•
Supply voltage
•
Phase sequence
•
Missing phase
•
Power factor (cos phi)
•
Harmonic distortion
•
Starting capacitor (single-phase operation only)
•
Run capacitor (single-phase operation only).
The MP 204 protects against:
•
Overload
•
Dry running in pumping systems
•
Incipient motor defect
•
Too high motor temperature
•
Power supply failure
As a standard, the MP 204 incorporates:
•
A display for reading values, such as current,
voltage, temperature, cos phi, warning and trip
codes
•
Relay output for external fault indication
•
GENIbus connection
•
Pt100/Pt1000 sensor input
•
PTC/thermal switch input
9. Servicing and maintaining the
product
9.1 Safety instructions and requirements
9.2 Maintenance
Normally, the pump must be subjected to a major
overhaul in a service workshop every third year. This
requires special tools and must be done by an
authorised service workshop.
Inspect pumps running normal operation twice a
year.
Check the following points:
•
Visual check
See section
•
Propeller or impeller clearance
See section
9.2.2 Inspecting and adjusting the
propeller or impeller clearance
•
Oil level and oil condition
See section
9.2.3 Checking and changing the oil
DANGER
Electric shock
Death or serious personal injury
- Before starting work on the pump, make
sure that the main switch has been
locked in position 0/Off.
WARNING
Crushing of hands
Death or serious personal injury
- Make sure that all rotating parts have
stopped moving.
Maintenance and service must be carried
out by specially trained people.
Inspect the oil
– once a year for pumps in intermittent
operation
– every six months for pumps in
permanent operation.
