4
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.
2. Nameplates
Rating and approvals of the MP 204.
Fig. 1 Nameplate on front cover
These four numbers must be stated when contacting
Grundfos:
Fig. 2 Nameplates on the side of MP 204
3. Product range
•MP204
• External current transformers up to 1000 A.
4. Functions
• Phase-sequence monitoring
• Indication of current or temperature
(user selection)
• Input for PTC/thermal switch
• Indication of temperature in °C or °F
(user selection)
• 4-digit, 7-segment display
• Setting and status reading with the R100
• Setting and status reading via the GENIbus.
Tripping conditions
•Overload
• Underload (dry running)
• Temperature (Tempcon sensor, PTC/thermal
switch and Pt sensor)
• Missing phase
• Phase sequence
• Overvoltage
• Undervoltage
• Power factor (cos ϕ)
• Current unbalance.
Warnings
•Overload
• Underload
• Temperature (Tempcon, see section 12.2, and
Pt sensor)
• Overvoltage
• Undervoltage
• Power factor (cos ϕ)
Note: In connection with single- and three-phase
connection.
• Run capacitor (single-phase operation)
• Starting capacitor (single-phase operation)
• Loss of communication in network
• Harmonic distortion.
Learning function
• Phase sequence (three-phase operation)
• Run capacitor (single-phase operation)
• Starting capacitor (single-phase operation)
• Identification and measurement of Pt100/Pt1000
sensor circuit.
4.1 Factory settings
Current limit: 0 A
Nominal voltage: 400 V
Class: P (trip delay: 10 seconds)
Trip delay: 5 seconds
Number of phases: 3, non-earthed
Power-on delay: 2 seconds.
Learning function: Active.
Active trip limits
Overload according to class
Underload: –40%
Overvoltage: +20%
Undervoltage: –20%
Phase-sequence monitoring
Current unbalance: 10%
PTC/thermal switch.
Note: The overvoltage and undervoltage trip limits
will be deactivated automatically if the temperature
monitoring with Tempcon or Pt100/Pt1000 has been
set to active, see sections 9.4.8 and 9.4.9.
Active warnings
Run capacitor, low: –50%
Starting capacitor, low: –50%.
TM03 1472 0806
Pos. Description
1 Product number
2 Version number
3 Serial number
4 Production code
TM03 1495 / 1496 / 1421 0806
Prod. No.
96765271
Serial No.
P. c .
V01
0001
0442
IP 20
2
4
1
3
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