Product Manual

Accessories
SQ, SQE, CU 331, and SP
19
135
Control functions
This table describes the protection provided by MP 204.
CU331SP constant pressure drive kits
Includes pressure sensor
Control parameters Function Problem Advantages
Temperature
MS
The motor temperature is measured by means of the
built-in Tempcon temperature transmitter and a signal is
sent to MP 204 via the phase leads. In MP 204 the
measured temperature is compared with the factory-set
value of 167 °F (75 °C).
MMS
The motor temperature is measured by means of the
Pt100. The signal is sent to the MP 204 where the
measured temperature is compared with the factory-set
value. Temperature protection requires a submersible
motor with a Pt100.
The motor temperature must be monitored during variable
frequency drive operation.
Overload, frequent starts/stops,
operation against blocked
discharge pipe, insufficient flow
velocity past the motor.
Longer motor life, safe
operating conditions,
service indication.
Overvoltage/undervoltage If the set trip value is exceeded, the motor will stop.
The installation is close to a
transformer. The mains do not
absorb load variations.
Important installation
parameter, possibility of
improving operating
conditions.
Overload
The motor power input is measured on each of the three
phases. The registered power input is an average of
these three values. If the factory-set value is exceeded,
the motor will stop.
Incorrect sizing of pump/motor,
voltage supply failure, defective
cable, blocking, wear or
corrosion.
Longer pump life, safe
operating conditions,
service indication.
Underload (dry running)
The motor power input is measured on each of the three
phases. The registered power input is an average of
these three values. If the average value is lower than the
factory-set value, the motor will stop.
Pump exposed to dry running or
underload, for example caused
by wear.
Traditional dry-running
protection is no longer
necessary, no extra
cables.
Current unbalance
The power input of the motor is measured on each of the
three phases.
Mains load is uneven, incipient
motor defect, phase voltages
diverging.
Motor protection against
overload, service
indication.
Phase sequence
MP 204 and motor are installed so that the phase
sequence corresponds to correct direction of rotation.
MP 204 monitors changes in the phase sequence.
Two phases are wrongly
connected.
Ensures correct pump
performance.
Phase failure
MP 204 checks the phases connected, phase failure will
cause an alarm.
Phase failure
Indication of phase failure,
and alarm.
TM05 5801 4012
Enclosure type NEMA Hp Input Ph Input volts Product number
Approx.
ship wt.
[lbs]
Indoor Type 12
2 1 200-240 98370277 60
3 1 200-240 98370280 60
5 1 200-240 98370304 60
Outdoor Type 4X
2 1 200-240 98370279 60
3 1 200-240 98370301 60
5 1 200-240 98370305 60