Electrical Connection; Connection Of Converter; Generator Operation; Procedure For Starting Generator Operation - Grundfos MP 1 Bedienungsanleitung

7. Electrical connection

Warning
Before starting work on the pump, make sure that
the electricity supply has been switched off and
that it cannot be accidentally switched on.

7.1 Connection of converter

The electrical connection of the converter should be carried out in
accordance with local regulations and standards.
Connect the converter to the mains supply (1 x 220-240 V – 15 %/
+ 10 %, 50/60 Hz, PE) as follows:
1. Loosen the front cover by removing the four screws in the
corners.
2. Lift up the cover.
3. Remove the cap from one of the cable entries, and fit a gland
for the mains cable.
4. Connect the mains cable (min. 3 x 1.5 mm
table below.
Connector inside the converter
L1 L2 N GND R1/B+ R2 B- T1 T2 T3
Phase Neutral Not used PE
Warning
The pump must be earthed.
If the pump is connected to an electric installation where an earth
leakage circuit breaker (ELCB) is used as additional protection,
this circuit breaker must trip out when earth fault currents with
DC content (pulsating DC) occur.
The earth leakage circuit breaker must be marked with the
symbol shown: .
By means of the converter, the frequency can be continuously
adjusted from approx. 25 to approx. 400 Hz.
The portable MP 1 sampling unit is primarily
designed for generator operation. If the unit is
connected to the mains supply, local regulations
dealing with radio interference suppression must
Note
be observed. It is recommended to install a radio
noise filter between the MP 1 converter and the
supply mains.
Before the MP 1 converter is connected, it must be checked that
the supply voltage lies within the following range:
1 x 220-240 V – 15 %/+ 10 %, 50/60 Hz, PE.

7.2 Generator operation

When a generator is used, it is particularly important to check that
the voltage lies within the specified range.

7.3 Procedure for starting generator operation

1. Lower the MP 1 pump into the borehole. Connect the motor
leads to the MP 1 converter. See section 7.5 Connection of
pump.
2. Start the generator. Connect the MP 1 converter to the
generator when the generator is operating steadily. The
generator output voltage must lie within the specified range,
i.e. 1 x 220-240 V –15 %/+ 10 %, 50/60 Hz, PE, to ensure
proper operation and prevent damage to the system. If the
voltage is too high or too low, adjustments to the generator
must be made to allow the system to run.
3. The frequency converter will initialise and is ready to drive the
motor. After the initialisation, the following will be displayed:
DIAG.
MOTOR VOLTS
MOTOR CURR
MOTOR FREQ
PROG
Fig. 10 Display text
Explanation to the display
Pos.
1
2
) according to the
2
3
4
5
Not used
4. Press [FWD] to start the pump.
5. Press [ ] to increase the speed, or press [ ] to decrease the
speed. To increase or decrease the speed in larger
increments, keep the button pressed.
6. Press [STOP] to stop the pump.
See section 7.4 Procedure for stopping generator operation.
7. Press [ENTER] to allow the user to quickly set the speed to
any given value. Press [ ] or [ ] to change the speed and
[ ] or [ ] to move the cursor between digits. The default
speed setting is 25 Hz. Press [FWD] once to run the motor at
the set speed.

7.4 Procedure for stopping generator operation

1. Press [STOP] on the MP 1 converter.
2. Wait until MOTOR FREQ shows 0.00 Hz in the display.
3. Disconnect the MP 1 converter.
4. Stop the generator.
5. Disconnect the MP 1 pump from the MP 1 converter.
Fig. 11 [STOP] button

7.5 Connection of pump

Connect the motor cable from the pump at the bottom of the
converter.
1
STOP
2
MP 1
0.00r
Display Description
STOP or FWD Status
MP 1 or SPE Pump type
Output voltage Motor voltage
X.X A Motor current (output current)
Motor frequency (output frequency
X.XX Hz
in Hz)
Warning
Never fit or remove the motor cable plug from the
converter unless the electricity supply to the
converter has been switched off.
LOCAL
3
0.0 V
4
0.0 A
5
0.00 Hz
MAIN
A
9