5.0 Literature and IOM ............................................................................................................................................................ 7
Single Phase Wiring ..................................................................................................................................................................8
Three Phase Wiring ..................................................................................................................................................................9
Technical Data ........................................................................................................................................................................10
Three Phase, 4" Motor - Electrical Data ..................................................................................................................................12
Generation II - 3-Wire, Single Phase, 4" Motors - Electrical Data ............................................................................................12
6" Single Phase Motors and Required Control Boxes ..............................................................................................................13
6-10" Three Phase Motors ...................................................................................................................................................... 13
6" Single Phase Motors ........................................................................................................................................................... 14
6-10" Three Phase Motors ...................................................................................................................................................... 14
Three Phase Power Unbalance ................................................................................................................................................15
Dole® is a Registered Trademark of Eaton Corporation.
Cla-Val™ is a Trademark of Griswold Ind.
2
WARNING
WARNING
WARNING
SAFETY INSTRUCTIONS
WARNING
CAUTION
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
DANGER
WARNING
CAUTION
DANGER
TO AVOID SERIOUS OR FATAL PERSONAL INJURY OR MAJOR PROPERTY DAMAGE, READ AND FOLLOW ALL
SAFETY INSTRUCTIONS IN MANUAL AND ON PUMP.
THIS MANUAL IS INTENDED TO ASSIST IN THE INSTALLATION AND OPERATION OF THIS UNIT AND MUST BE
KEPT WITH THE PUMP.
This is a SAFETY ALERT SYMBOL. When you see this symbol on the pump or in the manual, look for one of
the following signal words and be alert to the potential for personal injury or property damage.
DANGER
WARNING
CAUTION
Warns of hazards that WILL cause serious personal injury, death or major property damage.
Warns of hazards that CAN cause serious personal injury, death or major property damage.
Warns of hazards that CAN cause personal injury or property damage.
NOTICE: INDICATES SPECIAL INSTRUCTIONS WHICH ARE VERY IMPORTANT AND MUST BE FOLLOWED.
THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS PRIOR TO PERFORMING ANY WORK ON THIS PUMP.
MAINTAIN ALL SAFETY DECALS.
Important notice: Read safety instructions before proceeding with any wiring
All electrical work must be performed by a qualified technician. Always follow the National Electrical Code
(NEC), or the Canadian Electrical Code, as well as all local, state and provincial codes. Code questions should be
directed to your local electrical inspector. Failure to follow electrical codes and OSHA safety standards may result in personal
injury or equipment damage. Failure to follow manufacturer’s installation instructions may result in electrical shock, fire hazard,
personal injury or death, damaged equipment, provide unsatisfactory performance, and may void manufacturer’s warranty.
Standard units are designed to pump potable water from wells and storage tanks. They are not designed for use
in swimming pools, open bodies of water, hazardous liquids, or where flammable gases exist. Well must be vented
per local codes.
Only pumps specifically Listed for Class 1, Division 1 are allowable in hazardous liquids and where flammable gases may exist.
See specific pump catalog bulletins or pump nameplate for all agency Listings.
Disconnect and lockout electrical power before installing or servicing any electrical equipment. Many pumps are
equipped with automatic thermal overload protection which may allow an overheated pump to restart
unexpectedly.
Do not lift, carry or hang pump by the electrical cables. Damage to the Electrical Cables can cause shock,
burns or death.
Use only stranded copper wire to pump/motor and ground. The ground wire must be at least as large as the power
supply wires. Wires should be color coded for ease of maintenance and troubleshooting.
Install wire and ground according to the National Electrical Code (NEC), or the Canadian Electrical Code, as well
as all local, state and provincial codes.
Install an all leg disconnect switch where required by code.
The electrical supply voltage and phase must match all equipment requirements. Incorrect voltage or phase can
cause fire, motor and control damage, and voids the warranty.
All three phase (3Ø) controls for submersible pumps must provide Class 10, quick-trip, overload
protection.
All splices must be waterproof. If using splice kits follow manufacturer’s instructions.
Select the correct type and NEMA grade junction box for the application and location. The junction box must
insure dry, safe wiring connections.
Failure to permanently ground the pump, motor and controls before connecting to power can cause shock, burns
or death.
Insure proper motor cooling, see Table 3, minimum flow rates chart in Technical Section.
This pump has been evaluated for use with Water Only.
Never over pressurize a storage tank to a pressure higher than the tank's maximum pressure rating. This will
damage the tank, voids the warranty and may create a serious hazard.
3
1.0 PREPARING FOR INSTALLATION
1.0 PREPARING FOR INSTALLATION
The well should be developed (cleaned) and disinfected
before the pump is installed.
Write the pump model number, pump serial number and
motor serial number in the space provided in this Installation
and Operation Manual (IOM). Leave the completed IOM
attached to the tank or control box in a dry area or give it to
the owner. Attach your business card.
Verify that motor voltage, control voltage, coil voltage
(3 phase starters) and power supply voltage match. Electrical
installation must be performed by qualified personnel.
Inspect all components for shipping damage and insure that
you have all the components that are required: Pump Water
End, Motor, 1Ø Motor Control Box or 3Ø Starter with
Overloads, Pressure Tank, Pressure Switch, Copper Wire,
Pressure Relief Valve (if required), Torque Arrestor (if
required), Pipe and Fittings.
2.0 MECHANICAL ASSEMBLY – Pump and Piping
2.0 MECHANICAL ASSEMBLY – Pump and Piping
2.1 Typical Systems
Pump in “Can”
Figure 3
Figure 1
Pump with Flow Sleeve in Tank
Figure 4
Pump with Flow Sleeve in Large Diameter Well
Figure 5
Horizontal Pump in “Can”
Figure 6
Figure 2
4
2.2 Assemble Pump End to Motor
Under no circumstance should the pump be run dry. Doing
so may damage internal parts. We suggest you check the
rotation on a three phase motor before assembling it to the
water end (pump). All 4" and 6" single phase motors should
rotate counterclockwise when viewed from the shaft end.
Rotation on three phase motors should match pump specifications. Due to the high-starting torque the motor should
be secured in such a way as not to damage the motor but to
hold the motor from spinning.
Lower the pump into the well. Set the pump at least 10' off
the bottom but above the screens. Protect the wires from
chafing on the well casing. Install a pitless adapter or similar
device at the wellhead. Consult the fitting manufacturer or
pitless supplier for specific installation instructions.
Using waterproof electrical tape, or wire ties, fasten the
wires to the drop pipe at 10' intervals. Make sure that the
tape does not loosen as it will block the pump suction if it
falls down the well.
Remove the cable guard from the pump (water end). Install
the motor shaft sand slinger if included with the water end in
the motor mounting hardware package. Attach the water end
to the motor. Align the wires in the cable guard and reinstall
it to the water end.
2.3 Install Check Valve(s)
Discharge heads are threaded with NPT pipe threads. All
models, without built-in check valves, require a spring
loaded check valve within 25' (7.5m) of the pump discharge
and below the drawdown level of the water supply. Motor
manufacturers recommend additional check valves every 200'
to 250' (70m) in the vertical discharge line. Check valves are
used to hold pressure in the system and to prevent backspin,
water hammer and upthrust.
Backspin is allowing water to flow back through the pump to
drain the system. It causes the impellers and motor rotor to
rotate in a reverse direction. This can cause premature thrust
bearing wear and if the motor starts during backspin the
shaft can be twisted or broken.
Water Hammer occurs when the lowest check valve is more
than 30' above the standing water level or the lower check
valve leaks and the check valve above holds. This creates a
partial vacuum (void) in the discharge piping. On the next
start, water moving at a very high velocity fills the void and
strikes the closed check valve and the stationary water in the
pipe above it, causing a hydraulic shock. This shock (water
hammer) can split pipes, break joints, and damage the pump
and motor. Water hammer is an easily detected noise. When
discovered the pump should be immediately shut down and
the installer contacted to resolve the problem.
2.5 Pressure Relief Valve
Pressure relief valves are mandatory (required) on any system
that is capable of producing over 100 psi or 230' TDH. In
an area where a water leak or blow-off may damage property
connect a drain line to the pressure relief valve. Run it to a
suitable drain or an area where the water will not damage
property.
2.6 Pressure Tank and Pressure Switch (when used)
The pressure switch should be located at the tank cross tee
on a single tank and as close to the center as possible on
multiple tank installations. Multiple tank installations should
have a manifold pipe 1½ to 2 times the size of the supply
pipe from the pump. This is to reduce the friction head loss
or pressure differential in the manifold. Excessive losses
could cause switch chatter. There should be no filters, or
high loss fittings between the switch and the tank(s). Wide
open gate valves are allowed between the tank and switch.
2.7 Adjusting Tank Pre-Charge (when used)
Insure that the tank is empty of water. Use a high quality
pressure gauge to check the tank pre-charge pressure. The
pressure should be 2 psi below the pump cut-in (turn on)
pressure. As an example, a 30-50 psi system would use a
tank pre-charge of 28 psi.
Select an area where the temperature is above 34° F in which
to install the tank, pressure switch, and pressure relief valve.
The tank should be located in an area where a leak will not
damage property.
3.0 ELECTRICAL INSTRUCTIONS
3.0 ELECTRICAL INSTRUCTIONS
Upthrust is an upward movement of the impellers and motor
shaft. It is caused by starting the pump at zero head due to
no check valve or a leaking check valve; or very low system
head due to a high static water level. Repeated upthrust can
cause premature failure of either or both the pump and the
motor. See 4.2
2.4 Installing Pump in Well
If you are using a torque arrestor, install it per the manufacturer’s installation instructions. On top feeding wells or large
diameter wells where water velocity will not cool the motor properly install a flow sleeve over the pump. See Table 3
– Required Cooling Flow.
Connect the discharge pipe to the pump discharge head.
Submersible pumps are capable of very high discharge pressures, consult with your pipe supplier to determine the best
pipe material and schedule for each installation.
3.1 General
Note: Do not power the unit or run the pump until all
electrical and plumbing connections are completed and the
pump is filled with water.
Always follow the National Electric Code (N.E.C.) in the
U.S., or the Canadian Electrical Code in Canada, as well as
all state, provincial, or local codes.
All electrical work must be performed by qualified
personnel. Some local laws require installation by only
“licensed installers”.
We suggest using only copper wire. Size wire from the charts
found in our ITT MAID, Motor Application & Installation
Manual, or an N.E.C.( National Electric Code) manual. If
discrepancies exist the N.E.C. in the U.S., and in Canada the
Canadian Electrical Code prevails.
5
3.2 Splice Drop Cable to Motor Leads
When the drop cable must be spliced or connected to the
motor leads it is necessary that the splice be watertight. The
splice can be done with heat shrink kits, compression fittings,
or waterproof tape. Match motor leads and drop cable by
color codes or identify drop cable wires to insure a proper
connection at the control box.
A. Heat Shrink Splice Instructions
To use a typical heat shrink kit: strip ½" from the motor
wires and drop cable wires, it is best to stagger the splices.
Place the heat shrink tubes on the wires. Place the crimps
on the wires and crimp the ends. Slide the heat shrink
tubes over the crimps and heat from the center outward.
The sealant and adhesive will ooze out the ends when the
tube shrinks. The tube, crimps, sealant, and adhesive
create a very strong, watertight seal. Overheating may
burn the heat shrink tubes.
B. Taped Splice Instructions
1) Strip individual conductor of insulation only as far as
necessary to provide room for a stake type connector.
Tubular connectors of the staked type are preferred. If
connector O.D. is not as large as cable insulation,
build-up with rubber electrical tape.
2) Tape individual joints with rubber electrical tape, using
two layers; the first extending two inches beyond each
end of the conductor insulation end, the second layer two
inches beyond the ends of the first layer. Wrap tightly,
eliminating air spaces as much as possible.
3) Tape over the rubber electrical tape with #33 Scotch
electrical tape, or equivalent, using two layers as in step
“B” and making each layer overlap the end of the
preceding layer by at least two inches.
C. Compression Splice Kits
Consult instructions supplied with compression splice kits
or consult your local supplier.
3.3 Mounting the Motor Control Box
Single phase 3-wire control boxes are suitable for vertical
mounting in indoor or outdoor locations. They will operate
at temperatures between 14ºF ( -10º C) and 122º F (50º C).
Select a shaded, dry place to mount the box. Insure that there
is enough clearance for the cover to be removed.
3.6 Make Connection to Single Phase (1Ø) Control Box or Three Phase (3Ø) Starter
DANGER
Do not power the unit or run the pump until all electrical
and plumbing connections are completed. Exception – to
verify 3 phase motor rotation, it is acceptable to power the
motor before it is attached to the water end to verify correct rotation. After checking rotation lock-out disconnect or
circuit breaker in OFF position!
Verify that the disconnect or breaker is OFF before making any connections to the power supply. Always follow the
National Electric Code (N.E.C.) in the U.S., or the Canadian
Electrical Code in Canada, as well as all state, provincial, or
local codes.
A. Single Phase (1Ø) Three-Wire Control Box Wiring
CAUTION
Connect the color coded motor leads to the motor
control box terminals –
Y (yellow), R (red), and B (black); and the Green or bare
wire to the green ground screw.
Connect wires between the Load terminals on the pressure switch and control box terminals L1 and L2. Run a
ground wire between the switch ground and the control
box ground. See Fig. 7 or 8
B. Three Phase (3Ø) Starter Wiring
CAUTION
Connect the motor leads to T1, T2, and T3 on the 3
phase starter. Connect the ground wire to the ground
screw in the starter box. Follow starter manufacturers
instructions for connecting pressure switch (where used)
to starter. See Fig. 9 or 10
3.7 Make Power Supply Connection
CAUTION
Provide a separate fused or circuit breaker protected branch
circuit for the pump. Install a main disconnect switch in full
view and easily accessible from the pressure switch and tank
location.
3.4 Verify Voltage
Insure that motor nameplate voltage and power supply
voltage are the same. Three-phase starter coils are very
voltage sensitive, always verify actual supply voltage with
a voltmeter. High or low voltage will damage motors and
controls and is not covered under warranty.
3.5 Turn Supply Power Off
Use a disconnect switch where required by code. Turn the
circuit breaker OFF and lock-out the disconnect switch in
the OFF position to prevent accidentally starting the pump
before you are ready.
6
Single phase:
With pressure switch – make the connection from the pressure switch Line terminals to the disconnect switch (where
used) and then to the circuit breaker panel.
Without pressure switch – make the connection from the
control box L1 and L2 terminals to the disconnect switch
(where used) and then to the circuit breaker panel.
Three phase - make the connections between L1, L2, L3, and
ground on the starter to the disconnect switch and then to
the circuit breaker panel.
Three phase submersible motors require Class 10 Quick-Trip
overload protection. Use Furnas Class 14 NEMA starters
with ESP100 adjustable Class 10 overloads. You can also
use Furnas Class 16 starters with ambient compensated “K”
heaters (overloads) which you install in the starter. “K” heaters must be purchased separately. Consult the ITT MAID or
F.E. AIM manual for other acceptable overload protection
devices.
Note: when replacing a line shaft turbine or other above
ground pump with a submersible you must change the Class
20 overloads in the starter to Class 10 quick-trip’s for proper
motor overload protection. Use of Class 20 overloads voids
the submersible motor warranty.
Three phase installations must be checked for motor rotation
and phase unbalance. To reverse motor rotation switch (reverse) any two power leads. See the instructions for checking three phase unbalance in the Technical Section of this
manual. Failure to check and correct three phase unbalance
can cause premature motor failure and nuisance overload
tripping.
4.0 OPERATE PUMP
4.0 OPERATE PUMP
Check amps and insure they are within nameplate amp range
from motor data sheet or motor nameplate. Amps should be
between Rated Input and Service Factor Amps. High amps
may be caused by low or high voltage. Enter the amp readings in this manual along with the pump and motor model
numbers and serial numbers. On all three phase systems a
three phase unbalance test must be performed to insure a
balanced power supply. Leave a copy of the 3Ø unbalance
worksheet with this IOM at the job site for future reference.
On pressure tank/switch systems only – close the valve when
the water clears and allow the pressure to build. If properly
adjusted the switch should turn the pump off at the preset
pressure. Open a few outlets and allow the pump to run
through a few cycles. Check switch operation and verify that
pressure settings are correct. Check all fittings for leaks.
On manual systems, turn the pump off.
5.0 PAPERWORK AND IOM
5.0 PAPERWORK AND IOM
Please give this IOM and your business card to the owner.
A sticker with your name and phone number on the tank or
control box is a great sales tool for future business!
4.1 Throttling Discharge on Start-Up
If the pump will be started or operated with an “open”
discharge you must throttle the discharge before start-up.
Install a ball, globe, or Cla-valve® in the discharge line. Open
the valve to approximately 1⁄3 open on system start-up. This
will prevent upthrust damage to the pump and motor
bearings. You can open the valve when you get a good steady
stream of water. Do not exceed the maximum operating
range in gpm shown on the pump curve. If you do not know
the maximum gpm for the pump, call the distributor who
sold you the pump. Starting or running a pump with little or
no head is a major cause of premature failure.
4.2 Throttling a High Static Level Well to Prevent Upthrust
A high static water level well may allow a pump to operate
off the right side of the curve or outside the “Recommended
Range” shown on the pump curve. We recommend using a
“Dole®” flow restrictor or throttling the discharge with a ball
valve to prevent upthrust damage to the pump and motor.
The maximum flow must be within the pumps recommended
operating range. If you use a ball valve, set it and remove the
handle, tape the handle to the pipe. Tag the valve with a note
saying, “Do not open this valve or pump may be damaged”.
You can set the valve by installing a pressure gauge between
the well and the valve and throttling the flow/head to a value
within the recommended range. You can also throttle by determining the actual flow rate, see “Determining Flow Rates”
in your catalog Technical Section.
Congratulations on completing a professional installation of
a submersible pump.
6.0 ACCESSORIES
6.0 ACCESSORIES
Pressure Tanks
Tanks should be sized to allow pumps over two (2) hp to run
at least 2 minutes. If the pump averages 80 GPM it requires
tanks to provide a 160 gallon “drawdown”. See your Water
Products catalog for pressure tank data.
Low Water Protection
A low yield well should have low water protection added
to the system. Contact your distributor for information on
SymCom low water protection devices.
Electrical Panels
Customer Service will quote custom pump control panels.
Please send written panel specifications to your authorized
distributor. They will forward it to the Customer Service
Group that supports their product line. Written specifications
should include pump HP, Voltage, Phase, desired NEMA enclosure type, sequence of operation, special options needed,
and a brief statement describing any special logic for alarms,
timers, or duplexing features. The name and number of a
contact person to answer questions is also appreciated and
will speed your quote.
4.3 Start the Pump
Partially open a valve (boiler drain or faucet) in the system
and turn the breaker to the ON position. Allow the pump
to run until the water is clear. On three phase systems verify
rotation, correct rotation will yield the highest flow and
pressure.
7
Single Phase Wiring — Cableado monofásico — Montage monophasé
Single Phase Wiring — Cableado monofásico — Montage monophasé
Incoming Supply from Fuse Box or Circuit Breaker (1)
1. Suministro de entrada de la caja de fusibles o del cortacircuitos
L1L2
R Y Blk
Red
(8)
(9)(10)
L1L2
Disconnect
Switch (2)
(4)
L1L2
Black
Yellow
(3)
Three Wire
Control Box
Three Wire – Direct Connected to Pressure Switch
Trifilar – conectado directamente al interruptor
Line
Load
Load
Line
NOTE: SymCom PumpSaver (6)
(7)
por caída de presión
Moteur à trois fils – relié au prossostat
Figure (Figura) 7
Incoming Supply from Fuse Box or Circuit Breaker
Pressure
Switch
(5)
(1)
2. Interruptor de desconexión
3. Línea
4. Carga
5. Interruptor por caída de presión
6. NOTA: PumpSaver
7. Caja de control trifilar
8. Rojo
9. Amarillo
10. Negro
11. Contactador magnético
1. Courant d’entrée provenant de la boîte à fusibles ou du disjoncteur
2. Sectionneur
3. Ligne
4. Charge
5. Pressostat
6. Protection PumpSaver
7. Boîte de commande à trois fils
8. Rouge
9. Jaune
L1L2
RY Blk
Red
(8)
(9)
T1T2
L1L2
Black
Yellow
(10)
Disconnect
Switch (2)
(3)
Magnetic Contactor (11)
Three Wire
Control Box (7)
Three Wire – Connected through Magnetic Contactor
Trifilar – conectado a través del contactador magnético
Moteur à trois fils – relié par
contacteur magnétique
Line
(4)
Load
Load
Line
Pressure
Switch (5)
10. Noir
11. Contacteur magnétique
Figure (Figura) 8
8
Three Phase Wiring — Cableado trifásico — Montage triphasé
Three Phase Wiring — Cableado trifásico — Montage triphasé
Incoming Supply from Fuse Box or Circuit Breaker (1)
1. Suministro de entrada de la caja de fusibles o del cortacircuitos
L1L2L3
3
T1T2T3
Incoming Supply from Fuse Box or Circuit Breaker (1)
(4)
(3)
Disconnect
Switch (2)
Pressure Switch
Heaters (6)
Ambient Compensated
Magnetic Starter with
Quick-Trip Heaters
Three Phase Starter and Pressure Switch
Tres conexiones de fase
Pressostat et démarreur triphasé
(7)
Line
Load
(5)
Load
Line
Figure (Figura) 9
2. Interruptor de desconexión
3. Línea
4. Carga
5. Interruptor por caída de presión
6. Calentadores
7. Arrancador magnético con compensación ambiental con calentadores de disparo rápido
8. Interruptor por caída de presión u otros interruptores pilotos
9. Tierra
10. Puesta a tierra opcional del motor
11. Conexión de campo
12. Transformador de control (Las derivaciones deben coincidir con la
tensión de suministro)
1. Courant d‘entrée provenant de la boîte à fusibles ou du disjoncteur
2. Sectionneur
3. Ligne
4. Charge
5. Pressostat
6. Dispositifs de protection contre la surcharge (DPS)
L1L2
T1T2T3
Disconnect
Switch (2)
Field Connected (11)
L1L2
L3
23
Ambient
Compensated
Magnetic Starter
with Quick-Trip
Heaters (7)
Optional Motor
Grounding (10)
Three Phase Starter with Control Voltage Transformer
Arrancador trifásico con transformador de tensión de control
Démarreur triphasé avec transformateur de tension de commande
(9) GND
(3)
Control Transformer
(Shunts must be
matched to the Supply Voltage) (12)
(4)
Line
Load
Load
Line
Pressure
Switch
or other
Pilot
Switches (8)
Figure (Figura) 10
7. Démarreur magnétique compensé (température ambiante) avec
DPS à déclenchement rapide
8. Pressostat ou autre contacteur de commande
9. Terre
10. Mise à la terre optionnelle pour le moteur
11. Connexion sur place
12. Transformateur de commande (les circuits dérivés [
convenir à la tension d’alimentation)
shunts
] doivent
9
Technical Data
CAUTION
Technical Data
MOTOR INSULATION RESISTANCE READINGS
Normal Ohm/Megohm readings, ALL motors, between all leads and ground
To perform insulation resistance test, open breaker and disconnect all leads from QD control box or
pressure switch. Connect one ohmmeter lead to any motor lead and one to metal drop pipe or
a good ground. R x 100K Scale
Condition of Motor and Leads OHM Value Megohm Value
New motor, without power cable 20,000,000 (or more) 20.0
Used motor, which can be reinstalled in well 10,000,000 (or more) 10.0
Motor in well – Readings are power cable plus motor
New motor 2,000,000 (or more) 2.0
Motor in reasonably good condition 500,000 to 2,000,000 0.5 – 2.0
Motor which may be damaged or have damaged power cable
Do not pull motor for these reasons Motor definitely damaged or with damaged power cable
Pull motor and repair Failed motor or power cable
Pull motor and repair
Generator Sizing
Generator Sizing
Note: Always consult the generator
manufacturer when questions arise.
These sizing charts are recommendations based on motor
service factor loading for typical continuous duty generators. If
you need to call the generator manufacturer, be prepared to tell
them the motor KVA code, the service factor amperage, locked
rotor amperage, phase, hertz, motor type, etc.
You must know which type generator you have before using the
charts as the required generator size varies by type. Internally
regulated generators are also called self-excited. Externally
regulated generators are the most common. In addition to the
Kw/KVA rating, the generator frequency (Hertz, typically
Less than 10,000 0 – 0.01
60 HZ in USA) is very important when operating pumping
equipment because frequency variations affect pump output in
direct relation to the pump Affinity Laws. Operating under 60
hertz will reduce flow and head while operating over 60 hertz
will increase flow, head, HP and amp draw and could overload
the motor.
The generator should always be started before the pump/
motor is started and always stop the pump/motor before
shutting down the generator. Operating generators at higher
elevations or using natural gas as fuel can affect performance,
consult the generator manufacturer for their recommendations
in these instances.
20,000 to 500,000 0.02 – 0.5
10,000 to 20,000 0.01 – 0.02
Generator Recommendations
Generator Recommendations
Externally Regulated Internally Regulated
Motor HP KW KVA KW KVA
Minimum Generator Rating
Transformer Capacity Required for Submersible
Motors – Single or Three Phase
Distribution transformers must be adequately sized to satisfy
the KVA requirements of the submersible motor. When
transformers are too small to supply the load, there is a
reduction in voltage to the motor.
Table 1 references the motor horsepower rating, single
phase and three phase, total effective KVA required, and the
smallest transformer required for open or closed three phase
systems. Open systems require larger transformers since only
two transformers are used.
Other loads would add directly to the KVA sizing requirements of the transformer bank.
Table 1 – Transformer Capacity
Smallest KVA Rating –
Each Transformers
Motor HP Open WYE Closed
Total Effective or DELTA WYE or DELTA
KVA Required 2 Transformers 3 Transformers
NOTE: Transformers shown are standard nominal KVA ratings. If power company experience
and practice allows transformer loading higher than nominal rating under the specific operating conditions and maintains correct voltage and balance, such higher loading values may be
used for transformer(s) to meet total effective KVA required.
Mounting Position
Motors are suitable for operation in mounting positions
from vertical shaft up to horizontal. If 4 inch motors through
2 HP are started more than 10 times per day, it is recommended the shaft be tilted up at 15° from horizontal to
minimize coast-down wear of the upthrust washer.
Frequency of Starts
The average number of starts per day over a period of
months or years influences the life of a submersible pumping
system. Excessive cycling affects the life of control components such as pressure switches, starters, relays and capacitors, plus splines and bearings. Rapid cycling can also cause
motor overheating and winding failures.
The pump size, tank size and other controls should be selected to keep the starts per day as low as practical for longest
life, based upon the maximum number of starts per 24 hour
day, as shown in Table 2.
Motors over 2 HP should be allowed to run a minimum of
2 minutes to dissipate heat build up from starting current.
Table 2 – Number of Starts
Maximum Starts per 24 hour day
Motor Rating
½ HP through 5 HP 100 300
7½ HP through 30 HP 50 100
40 HP and over — 100
Single Phase Three Phase
Motor Cooling, Temperature and Time Ratings
All 4 inch CentriPro motors may be operated continuously
in water up to 86º F. Optimum service life will be attained
by maintaining a minimum flow rate past the motor of .25
feet per second. Use a Flow Sleeve if velocity is below the
.25'/sec, if the well is top feeding or when the pump is used
in a large body of water or large tank.
Six (6) inch canned design motors from 5 – 40 HP will
operate in water up to 95º F (35º C), without any de-rating
of horsepower, with a minimum flow rate of .5 ft./sec. past
the motor. 6" – 50 HP and all 8" – 10" motors can operate in
77º F (25º C) water with .5'/sec velocity past the motor.
Table 3 – Minimum Flow Rates For Proper Motor Cooling
5-30 HP, 3 Phase 230 and 460 Motors have adjustable voltage feature, change voltage plugs to convert from 230V to 460V
operation. Spare Change Plug Order No's are: PLUG-230V or PLUG-460V.
HP kW Volts Phase
Motor Dia.
vs Flange Dia.
6" x 6"
8" x 6"
8" x 8"
Amps Watts Amps Watts
53.0 35530 60.0 41100 340
65.0 44360 73.0 51000 435
127.0 87600 145.0 101300 795
Rated Input Service Factor
S.F.
L.R.
Amps
➀
13
6" SINGLE PHASE MOTORS
Motor
Order No.
6M051 5 3.7 74.8 G 2.172 0.512 2.627
6M071 7.5 5.5
6M101 10 7.5 73.6 E 1.052 0.316 1.310
6M151 15 11 73.7 D 0.678 0.230 0.850
A full three phase supply consisting of three individual
transformers or one three phase transformer is recommended. “Open” delta or wye connections using only two
transformers can be used, but are more likely to cause poor
performance, overload tripping or early motor failure due to
current unbalance.
Check the current in each of the three motor leads and
calculate the current unbalance as explained below.
If the current unbalance is 2% or less, leave the leads as
connected.
If the current unbalance is more than 2%, current readings
should be checked on each leg using each of the three possible hook-ups. Roll the motor leads across the starter in the
same direction to prevent motor reversal.
Motor Leads R B Y Y R B B Y R
T3 T1 T2 T2 T3 T1 T1 T2 T3
To calculate percent of current unbalance:
A. Add the three line amp values together.
B. Divide the sum by three, yielding average current.
C. Pick the amp value which is furthest from the average
current (either high or low).
D. Determine the difference between this amp value
(furthest from average) and the average.
E. Divide the difference by the average.
Multiply the result by 100 to determine percent of
unbalance.
Current unbalance should not exceed 5% at service factor
load or 10% at rated input load. If the unbalance cannot be
corrected by rolling leads, the source of the unbalance must
be located and corrected. If, on the three possible hookups,
the leg farthest from the average stays on the same power
lead, most of the unbalance is coming from the power
source.
Contact your local power company to resolve the imbalance.