Product Manual
Table Of Contents
- 1. SQ, SQE introduction
- 2. SQ, SQE applications
- SQ with pressure switch and pressure tank
- Constant-pressure control with CU 301, residential water supply
- Constant-pressure control with CU 301, irrigation
- Maintaining a constant water table
- Emptying or filling a tank
- Pumping from one tank to another
- Setting of operating parameters
- SQE with manual speed control
- 3. Performance range
- 4. SQ, SQE installation
- 5. Sizing and selection
- 6. Cable sizing
- 7. SQ, SQE curve charts
- 8. SQ, SQE technical data
- 9. SQ, SQE construction
- 10. CU331SP variable frequency drive
- 11. Accessories
- 12. SP introduction
- 13. SP product overview
- 14. SP construction
- 15. SP operating conditions
- 16. How to read the curve charts
- 17. SP curve charts and technical data
- 4" and larger wells
- SP 5S (5 gpm)
- SP 7S (7 gpm)
- SP 10S (10 gpm)
- SP 16S (16 gpm)
- SP 25S (25 gpm)
- SP 35S (35 gpm)
- SP 45S (45 gpm)
- SP 62S (62 gpm)
- SP 77S (77 gpm)
- 6" and larger wells
- SP 85S (85 gpm)
- SP 150S (150 gpm)
- SP 230S (230 gpm)
- SP 300S (300 gpm)
- 8" and larger wells
- SP 385S (385 gpm)
- SP 475S (475 gpm)
- 10" and larger wells
- SP 625S (625 gpm)
- SP 800S (800 gpm)
- SP 1100S (1100 gpm)
- 18. SP electrical data
- 19. Accessories
- 20. Energy consumption
- 21. Cables
- 22. Friction loss tables
- 23. Grundfos Product Center
Accessories
SQ, SQE, CU 331, and SP
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19. Accessories
MP 204
The MP 204 is an electronic motor protector, designed
for the protection of an asynchronous motor or a pump.
The motor protector consists of:
• a cabinet incorporating transformers and electronics
• a control panel with operating buttons and display
for reading of data.
The MP 204 operates with two sets of limits:
• a set of warning limits and
• a set of trip limits.
If one or more of the warning limits are exceeded, the
motor continues to run, but the warnings will appear in
the MP 204 display.
Some values only have a warning limit.
The warning can also be read out by means of the
Grundfos GO.
If one of the trip limits is exceeded, the trip relay will
stop the motor. At the same time, the signal relay is
operating to indicate that the limit has been exceeded.
Applications
The MP 204 can be used as a stand-alone motor
protector.
The MP 204 can be monitored via a Grundfos
GENIbus.
The power supply to the MP 204 is in parallel with the
supply to the motor. Motor currents up to 120 A are
passed directly through the MP 204. The MP 204
protects the motor primarily by measuring the motor
current by means of a true RMS measurement. The
MP 204 disconnects the contactor if, for example, the
current exceeds the preset value.
Secondarily, the motor is protected via temperature
measuring by a Tempcon sensor, a Pt100/Pt1000
sensor and a PTC sensor/thermal switch.
The MP 204 is designed for single- and three-phase
motors. In single-phase motors, the starting and run
capacitors are also measured. Cos φ is measured in
both single- and three-phase systems.
Benefits
The MP 204 offers these benefits:
• Suitable for both single- and three-phase motors
• Dry-running protection
• Overload protection
• Very high accuracy
• Made for submersible pumps.
Many monitoring options
The MP 204 monitors the following parameters:
• Insulation resistance before start-up
• Temperature (Tempcon, Pt sensor and PTC/thermal
switch)
• Overload/underload
• Overvoltage/undervoltage
• Phase sequence
• Phase failure
• Power factor
• Power consumption
• Harmonic distortion
• Operating hours and number of starts.
Fig. 69 MP 204
Five sizes of single-turn transformers, 120-999 A.
Note: Monitoring of motor temperature with Tempcon
sensor is not possible when single-turn transformers
are used.
Fig. 70 Single-turn transformers
TM03 1471 2205TM03 2033 3505