Product Introduction; Intended Use; Features; Applications - Grundfos MP 204 Montage- Und Betriebsanleitung

2. Product introduction

2.1 Intended use

MP 204 is an electronic motor protector, designed for
the protection of an asynchronous motor or a pump.
It must always be installed in a cabinet.
MP 204 is designed for single- and three-phase
motors. In single-phase motors, the start and run
capacitors are also measured. Cos φ is measured in
both single- and three-phase systems.
MP 204 must only be installed according to the
technical specifications. See the installation and
operating instructions for the product.

2.2 Features

The motor protector consists of the following
components
• a cabinet incorporating instrument transformers
and electronics.
• an operating panel with operating buttons and
display for reading of data.
MP 204 operates with two sets of limits:
• a set of warning limits
• 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.
If one of the trip limits is exceeded, the trip relay
stops the motor. At the same time, the signal relay is
operating to indicate that the limit has been
exceeded.
Some values only have a warning limit.
The warning can also be read by means of Grundfos
GO Remote.

2.3 Applications

MP 204 can be used as a stand-alone motor
protector.
MP 204 may also be incorporated in a Grundfos
Dedicated Controls system in which it functions as a
motor protector and data collection unit transmitting
measured values via Grundfos GENIbus to the
Grundfos CU 362 control unit.
Monitoring of MP 204 is possible via Grundfos
GENIbus.
The power supply to MP 204 is in parallel with the
supply to the motor. Motor currents up to 120 A are
passed directly through MP 204. MP 204 protects the
motor primarily by measuring the motor current by
means of a true RMS measurement. MP 204
disconnects the contactor if, for example, the current
exceeds the preset value.
The pump is protected secondarily by measuring the
temperature with a Tempcon sensor, a Pt100/Pt1000
sensor and a PTC sensor/thermal switch.
6

3. Receiving the product

3.1 Transporting the product

CAUTION
Falling objects
Minor or moderate personal injury
- Wear safety shoes and helmet.
CAUTION
Sharp element
Minor or moderate personal injury
- Wear protective gloves to avoid being
cut by the sharp edges of the
packaging.

4. Nameplates

Rating and approvals.
1
Prod. No. 96079927
Serial No.
0001
IP 20
3
Fig. 1 Nameplate on front cover
These four numbers must be stated when contacting
Grundfos:
Pos. Description
1 Product number
2 Version number
3 Serial number
4 Production code
Type
MP 204 IP 20
Vin nom. 100-480 V~50/60HZ
Current 3-120 A~ Pint. 5 W
IEC/EN
60947
N2042
UL508
Relay Contact Pilot Duty 400V 2A~
rating UL Pilot Duty R150=
Relay Contact 400V 2A AC-15, 400VA
rating IEC 24V 2A DC-13, L/R=40ms, 48W
Fig. 2 Nameplates on the side of MP 204
2
V01
P.c.
0442
4
Ta -20°C to 60°C
Ifuse max 160 A
Ic <10kA
Made in Estonia
DK-8850 Bjerringbro, Denmark
Ta -20°C to 40°C
Industrial Control Equipment
25BZ