22 23
45°
If there is a risk of sediment build-up, su ch as sand,
around the motor, a flow sleeve s hould be used in
order to ensure pr oper cooling of the motor.
* At an ambient pr essure of min imum 1 bar ( 1 MPa)
5. Electrical con nection
5.1 General
The electrical connectio n should be carried out by an
authorised electri cian in accord ance with loc al
regulations.
The supply vol tage, rated maximum cu rrent and
cos appear from th e loose data plate that must be
fitted close to t he installatio n site.
The required vol tage qualit y for Grun dfos MS and
MMS submersible mo tors, measure d at the motor
terminals, is – 1 0 %/+ 6 % of the nominal v oltage
during continuous operation (inc luding variat ion in
the sup
ply voltage and los ses in cables ).
Furthermore, it must be ch ecked that there is voltage
symmetry in the el ectricity su pply lines, i.e. same
difference of v oltage bet ween the individua l phases .
See also 9. Checki ng of motor a nd cable, po int 2.
If MS motors with a built-in tempe rature transmitte r
(Tempcon) are not inst alled t ogethe r with an MP 204
or similar Grundfo s motor protec tion, they mu st be
connected to a 0. 47 µF capacitor app roved for
phase-phase operat ion (IEC 384 -14) to meet the
ECEM C directive ( 2004/108/EC) . The capacit or
must be connected to the two p hases to which the
temperature trans mitter is con nected. See f ig. 4.
Fig. 4 Connection of capacitor
The
motors are wound for direct-o n-line starting or
star-delta startin g and the s tarting curren t is bet ween
4 and 6 times the rated current of the motor.
The run-up tim e of the moto r is only abou t
0.1s econd. Direct -on-line start ing is ther efore
normally approved by the electr icity supply
authorities.
5.1.1 Frequency con verter operat ion
Three-phase MS motors can be connec ted to a
frequency converte r.
If a temperature transmitter i s required, a Pt100
sensor for fitting to the subme rsible motor can be
ordered from Grund fos.
Note
In cases where the stated liq uid
velocity cannot be achieved, a f low
sleeve must be ins talled.
Motor
Installation
Flow
past the
motor
Vertical Horizonta l
MS 402
MS 4000
MS 6000
0.15 m/s
40 °C
(~ 105 °F)
40 °C
(~ 105 °F)
MS 4000I*
MS 6000I*
0.15 m/s
60 °C
(~ 140 °F)
Flow sleeve
recommended
60 °C
(~ 140 °F)
Flow sleeve
recommended
MS6T30 0.15 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
MS6T60 1.0 m/s
60 °C
(~ 140 °F)
60 °C
(~ 140 °F)
MMS
0.15 m/s
25 °C
(~ 77 °F)
25 °C
(~ 77 °F)
0.50 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
Note
For 37 kW MMS 6000, 110 kW MMS 80 00
and 170 kW MMS 100 00, the maxim um
liquid temperatur e is 5 °C lo wer than
the values stated in the above table.
For 190 kW MMS 100 00, the
temperature is 10 °C lower.
Warning
Before startin g work on the motor,
make sure that the electricity supply
has been switched off and that it cann ot
be accidentally switched on.
Warning
The motor must b e earthed.
The motor must b e connecte d to an
external mains sw itch with a m inimum
contact gap of 3 m m in all pole s.
Caution
If an MS motor w ith tempera ture
transmitter is connec ted to a frequenc y
converter, a fuse inc orporated in the
transmitter will melt and the transmitter
will be inactive. The transmitte r cannot
be reactivated. Th is means that the
motor will operate like a motor without
a temperature tran smitter.
1
2
3
4
1 = L1: brown
2 = L2: black
3 = L3: grey
4 = PE: yellow/gre en
0.47 F
8
4.1.2 Grundfos MS6 and MS 6000 submersible
motors
• If the motor i s delivered from stock, th e liquid
level must be che cked before t he motor is
installed. See fig. 2.
• In the case of service, t he liquid le vel must b e
checked. See fig. 2.
Filling procedure:
The filling hole for m otor liquid is p laced at th e top of
the motor.
1. Pos ition the subm ersible motor as shown in fi g. 2.
The filling sc rew must be at the highe st point of
the motor.
2. Rem ove the screw from the fill ing hole.
3. Inj ect liquid in to the motor w ith the filli ng syringe,
fig. 2, until the liquid runs back out of th e filling
hole.
4. Rep lace the scre w in the filli ng hole and t ighten
securely before ch anging the po si
tion of the
motor.
Torque: 3.0 Nm.
The submersible mo tor is now re ady for instal lation.
Fig. 2 Motor positio n during fill ing – MS6 and
MS 6000
4.1.3 Grundfos MMS 6000, MMS 8000, MMS 10000
and MMS 12000 subm ersible motor s
Filling procedure:
Place the motor at a 45 ° angle with the top of the
motor upwards. See fig. 3.
5. Uns crew the plug (A) and place a funnel in the
hole.
6. Pou r tap water into the motor until the motor liquid
inside the motor st arts runn ing out at the p lug (A ).
Caution: Do not us e motor liqu id as it con tains
oil.
7. Rem ove the funne l and refit th e plug (A).
The submer
sible motor is now ready for in stallation.
Fig. 3 Motor positio n during fill ing – MMS
4.2 Positional requirements
The motor can be i nstalled eithe r vertically or
horizontally.
A complete list of motor types suitable for h orizontal
installation is sh own in sectio n 4.2.1.
4.2.1 Motors suitabl e for horizon tal installation
4.3 Liquid tempe ratures/cooli ng
The maximum liqui d temperature and the minim um
liquid velocity pa st the motor a ppear from th e
following table.
It is recommended to insta ll the motor above the we ll
screen in order to achieve prop er motor cool ing.
TM03 8129 0507
Caution
Before fitting the motor to a pump after
a long period of storage, lu bricate the
shaft seal by addin g a few dro ps of
water and turning t he shaft.
45°
TM03 2065 3605
Motor type
Power output
50 Hz
Power output
60 Hz
[kW] [kW]
MS All sizes All sizes
MMS 6000 3.7 to 30 3.7 to 30
MMS 8000 22 to 92 22 to 92
MMS 10000 75 to 1 70 75 to 170
MMS 12000 147 to 220 –
Caution
During operation, t he motor mu st
always be completely sub merged in the
liquid. Please con sult the pump
manufacturer's NPS H data.
Warning
If the motor is used in hot l iquids
(40 to 60 °C), it must be ensured tha t
persons cannot co me into co ntact with
the motor and the installation, e.g. by
installing a guard .
45°
A
1 3
4 2
280Nm
45°
!
9
If there is a risk o f sediment b uild-up, such as sand,
around the motor, a fl ow sleeve shou ld be used in
order to ensure prop er cooling of the motor.
* At an ambient pres sure of minim um 1 bar (1 MPa)
5. Electrical conne ction
5.1 General
The electrical connection sho uld be carried out by an
authorised electricia n in accordan ce with local
regulations.
The supply voltag e, rated m aximum cur rent and
cos appear from the loose d ata plate th at must be
fitted close to the installation site.
The required voltag e quality for Grundf os MS and
MMS submersible motor s, measured a t the motor
terminals, is – 10 % /+ 6 % of th e nominal vol tage
during continuous ope ration (inclu ding variation in
the su
pply voltage and loss es in cables) .
Furthermore, it must be chec ked that there is volta ge
symmetry in the elec tricity supp ly lines, i.e . same
difference of vol tage betw een the i ndividual phases.
See also 9. Checking of motor and cable, poin t 2.
If MS motors with a bu ilt-in temperat ure transmitter
(Tempcon) are not insta lled to gether with a n MP 2 04
or similar Grundfos m otor protecti on, they must be
connected to a 0.47 µF capacitor appro ved for
phase-phase operatio n (IEC 384-14 ) to meet the
ECEMC directive (20 04/108/EC). The capacito r
must be connected to the two phas es to which t he
temperature transmit ter is conne cted. See fig . 4.
Fig. 4 Connection of capacitor
The
motors are wound for direct-on -line starting or
star-delta starting and the sta rting c urrent is betwe en
4 and 6 times the rat ed current o f the motor.
The run-up time of the motor is only about
0.1sec ond. Direct-o n-line startin g is theref ore
normally approved by the electric ity supply
authorities.
5.1.1 Frequency conve rter operatio n
Three-phase MS m otors can be connected to a
frequency converter.
If a temperature tra nsmitter is required, a P t100
sensor for fitting to the submersi ble motor can be
ordered from Grundfo s.
Note
In cases where th e stated liquid
velocity cannot be ac hieved, a flo w
sleeve must be insta lled.
Motor
Installation
Flow
past the
motor
Vertical Horizontal
MS 402
MS 4000
MS 6000
0.15 m/s
40 °C
(~ 105 °F)
40 °C
(~ 105 °F)
MS 4000I*
MS 6000I*
0.15 m/s
60 °C
(~ 140 °F)
Flow sleeve
recommended
60 °C
(~ 140 °F)
Flow sleeve
recommended
MS6T30 0.15 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
MS6T60 1.0 m/s
60 °C
(~ 140 °F)
60 °C
(~ 140 °F)
MMS
0.15 m/s
25 °C
(~ 77 °F)
25 °C
(~ 77 °F)
0.50 m/s
30 °C
(~ 86 °F)
30 °C
(~ 86 °F)
Note
For 37 kW MMS 6000, 110 kW MMS 8000
and 170 kW MMS 10000 , the maximum
liquid temperature is 5 °C lowe r than
the values stated in the above tab le.
For 190 kW MMS 10000 , the
temperature is 10 °C lower.
Warning
Before starting w ork on the m otor,
make sure that the e lectricity su pply
has been switched off and that it cannot
be accidentally sw itched on.
Warning
The motor must be earthed.
The motor must be connected t o an
external mains switc h with a min imum
contact gap of 3 mm in all poles.
Caution
If an MS motor wit h temperatur e
transmitter is connecte d to a frequency
converter, a fuse incor porated in th e
transmitter will melt and the transmitter
will be inactive. The transmitter cannot
be reactivated. This means that th e
motor will operate li ke a motor wi thout
a temperature transm itter.
1
2
3
4
1 = L1: brown
2 = L2: black
3 = L3: grey
4 = PE: yellow/green
0.47 F
8
4.1.2 Grundfos MS6 a nd MS 6000 s ubmersible
motors
• If the motor is d elivered fro m stock, the liquid
level must be checke d before the motor is
installed. See f ig. 2.
• In the case of se rvice, the liquid lev el must be
checked. See fig. 2 .
Filling procedure:
The filling hole for mot or liquid is pl aced at the t op of
the motor.
1. Posit ion the subme rsible mo tor as s hown i n fig . 2.
The filling scre w must be a t the highest point of
the motor.
2. Remov e the screw fr om the fillin g hole.
3. Injec t liquid into the motor wit h the filling syringe,
fig. 2, until the li quid runs ba ck out of the f illing
hole.
4. Repla ce the screw i n the filling hole and tig hten
securely before chan ging the posi
tion of the
motor.
Torque: 3.0 Nm.
The submersible moto r is now read y for installat ion.
Fig. 2 Motor position during filling – MS6 and
MS 6000
4.1.3 Grundfos MMS 6000, MMS 8000, MMS 10000
and MMS 12000 submer sible motors
Filling procedure:
Place the motor at a 45 ° angle w ith the top of the
motor upwards. See f ig. 3.
5. Unscr ew the plug (A ) and place a funnel in th e
hole.
6. Pour tap wa ter into the mo tor until the mo tor liquid
inside the motor star ts runnin g out at the pl ug (A) .
Caution: Do not use motor liquid as it contai ns
oil.
7. Remov e the funnel a nd refit the plug (A).
The submer
sible motor is now r eady for insta llation.
Fig. 3 Motor position during filling – MMS
4.2 Positional re quirements
The motor can be ins talled either vertically or
horizontally.
A complete list of m otor types su itable for hori zontal
installation is show n in section 4.2.1.
4.2.1 Motors suitable for horizontal installation
4.3 Liquid tempera tures/cooling
The maximum liquid temperature an d the minimum
liquid velocity past the motor app ear from the
following table.
It is recommended to instal l the motor a bove the wel l
screen in order to a chieve proper motor coolin g.
TM03 8129 0507
Caution
Before fitting the mo tor to a pump a fter
a long period of st orage, lubr icate the
shaft seal by adding a few drops of
water and turning the shaft.
45°
TM03 2065 3605
Motor type
Power output
50 Hz
Power output
60 Hz
[kW] [kW]
MS All sizes All si zes
MMS 6000 3.7 to 30 3.7 to 30
MMS 8000 22 to 92 22 to 9 2
MMS 10000 75 to 170 75 to 170
MMS 12000 147 to 220 –
Caution
During operation, the motor must
always be completely subme rged in the
liquid. Please consu lt the pump
manufacturer's NPSH data.
Warning
If the motor is use d in hot liq uids
(40 to 60 °C), it mu st be ensured that
persons cannot come into cont act with
the motor and the in stallation, e. g. by
installing a guard.
45°
A
7 86
Pt100/1000
MMS10”
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