Electrical And Cue Information; Engine-Driven Generators - Grundfos SP Instrucciones De Instalación Y Funcionamiento

Do not connect the first plastic or flexible riser
pipe section directly to the pump. Always attach
a metallic nipple or adapter into the valve casing
at the top of the pump. When tightened, the
threaded end of the nipple or adapter must not
come in contact with the check valve retainer.
Fasten the submersible drop cable to the riser
pipe at frequent intervals to prevent sagging,
looping and possible cable damage. Nylon cable
clips or waterproof tape may be used. The cable
splice should be protected by securing it with
clips or tape just above each joint.
Check valves
Always install a check valve at the top of the
well. In addition, for installations deeper than
200 feet (61 m), install check valves at no more
than 200 ft (61 m) intervals.
Protect the well from contamination
To protect against surface water entering the
well and contaminating the water source, the
well should be finished off above grade, and a
locally approved well seal or pitless adapter unit
utilized.

6.6 Electrical and CUE information

Warning
USA: All electrical work should be
performed by a qualified electrician
and installed in accordance with
the National Electrical Code, local
codes and regulations.
Warning
Canada: All electrical work should
be performed by a qualified
electrician and installed in
accordance with the Canadian
Electrical Code, local codes and
regulations.
Warning
Provide acceptable grounding in
order to reduce the risk of electric
shock during operation of this
pump If the means of connection to
the box connected to the power
supply is other than a grounded
metal conduit, ground the pump by
connecting a copper conductor, at
least the size of the circuit
supplying the pump, to the
grounding screw provided within
the terminal box.
Make sure that the voltage, phase number and
frequency of the power supply match those of
the motor. Motor voltage, phase number,
frequency and full-load current information can
be found on the nameplate attached to the
motor.
Motor electrical data can be found in
section 10.7.1 Grundfos submersible motors -
60 Hz on page 29.
Warning
If voltage variations are larger than
± 10 %, do not operate the pump.
Direct on-line starting is used due to the
extremely short run-up time of the motor (max.
0.1 second), and the low moment of inertia of
the pump and motor. Direct on-line starting
current (locked rotor current) is between 4 and
6.5 times the full-load current.
If direct on-line starting is not acceptable and
reduced starting current is required, an
autotransformer or resistant starters should be
used for 5 to 30 hp motors (depending on cable
length). For motors over 30 hp, use auto-
transformer starters.

6.6.1 Engine-driven generators

If the submersible pump is going to be operated
by an engine driven generator, we suggest that
you contact the manufacturer of the generator to
ensure the proper generator is selected and
used. See section 10.2 Guide for engine-driven
generators in submersible pump applications
page 24 for generator sizing guide.
If power is going to be supplied through
transformers, section 10.3 Transformer capacity
required for three-phase submersible motors
page 25 outlines the minimum KVA rating and
capacity required for satisfactory pump
operation.
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