Xylem GOULDS 2GFK2412H, Инструкция по установке, эксплуатации и обслуживанию

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4.2 Make the electrical connections
4.2.1 General precautions
DANGER: Electrical Hazard
Before starting work on the unit, make sure that the unit and
the control panel are isolated from the power supply and
cannot be energized. This applies to the control circuit as
well.
WARNING: Electrical Hazard
Risk of electrical shock or burn. A certified electrician must
supervise all electrical work. Comply with all local codes and
regulations.
WARNING: Electrical Hazard
There is a risk of electrical shock or explosion if the electrical
connections are not correctly carried out, or if there is fault or
damage on the product. Visually inspect equipment for dam-
aged cables, cracked casings or other signs of damage.
Make sure that electrical connections have been correctly
made.
WARNING: Crush Hazard
Risk of automatic restart.
CAUTION: Electrical Hazard
Prevent cables from becoming sharply bent or damaged.
NOTICE:
Leakage into the electrical parts can cause damaged equipment or a
blown fuse. Keep the cable ends dry at all times.
Requirements
These general requirements apply for the electrical installation:
• If the pump will be connected to the public mains, then the supply
authority must be notified before installing the pump. When the
pump is connected to the public power supply, it can cause flicker-
ing of incandescent lamps when started.
• The mains voltage and frequency must agree with the specifications
on the data plate. If the pump can be connected to different voltag-
es, then follow the specified voltage on the yellow sticker close to
the cable entry.
• If the operation can be intermittent, then the pump must be sup-
plied with monitoring equipment supporting such operation.
• If stated on the data plate, then the motor is convertible between
different voltages.
• The thermal contacts or thermistors must be in use.
Motor and short-circuit protection
A qualified electrician must select the size of motor protection breakers
and fuses, so that it is sufficient for the specific motor data such as rated
current and starting current.
It is important that the short-circuit protection is not over-dimensioned.
Over-dimensioned fuses and motor protection breakers decrease the
protection for the motor.
• The fuse rating and the cables must be in accordance with the local
rules and regulations.
• The fuses and circuit breakers must have the correct rating. The
pump overload protection must be connected and set to the rated
current. See the data plate and if applicable the cable chart for the
rated current. The starting current in direct-on-line start can be up
to six times higher than the rated current.
Cables
These are the requirements to follow when you install cables:
• The cables must be in good condition, not have any sharp bends,
and not be pinched.
• The cables must not be damaged and must not have indentations
or be embossed (with markings, etc.) at the cable entry.
• The cable entry seal sleeve and washers must conform to the out-
side diameter of the cable.
• The minimum bending radius must not be below the accepted val-
ue.
• If using a cable which has been used before, a short piece must be
peeled off when refitting it so that the cable entry seal sleeve does
not close around the cable at the same point again. If the outer
sheath of the cable is damaged, then replace the cable.
Contact a sales or authorized service representative.
• The voltage drop in long cables must be taken into account. The
drive unit’s rated voltage is the voltage measured at the cable con-
nection point in the pump.
• For SUBCAB
®
cables, the twisted pair copper foil must be trimmed.
• All unused conductors must be insulated.
4.2.2 Grounding (earthing)
Grounding (earthing) must be done in compliance with all local codes
and regulations.
DANGER: Electrical Hazard
All electrical equipment must be grounded (earthed). Test
the ground (earth) lead to verify that it is connected correctly
and that the path to ground is continuous.
WARNING: Electrical Hazard
If the power cable is jerked loose, then the ground (earth)
conductor must be the last conductor to come loose from its
terminal. Make sure that the ground (earth) conductor is lon-
ger than the phase conductors at both ends of the cable.
WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an addi-
tional ground- (earth-) fault protection device to the ground-
ed (earthed) connectors if persons are likely to come into
contact with liquids that are also in contact with the pump or
pumped liquid.
4.2.3 Prepare the SUBCAB
™
cables
This section applies to SUBCAB ™ cables with twisted-pair control cores.
The prepared SUBCAB ™ cable The prepared screened SUBCAB ™
cable, without cable lugs
SUBCAB 1000V
T
1
T2
1
2
3
4
5
6
WS004299E
1. T1+T2 twisted pairs in control
element
2. Drain wire in control element
(tinned copper strands) with
shrink hose
3. Aluminum and textile layers
4. Insulation sheath or plastic
jacket, for the control element
5. Power cores
6. Ground (earth) core with yel-
low-green shrink hose
WS004298F
Screened SUBCAB
1
5
6
7
8
2
9
3 4
1. T1+T2 and T3+T4 twisted pairs
in control element
2. Drain wire in control element
(tinned copper strands) with
shrink hose
3. Aluminum and textile layers
4. Insulation sheath or plastic
jacket, for the control element
5. Power cores
6. Plastic laminated aluminum
foil, screen
7. Ground (earth) core with yel-
low-green shrink hose
8. Uncovered screen/braided
wire
9. Shrink hose
4 Installation
1310 Installation, Operation, and Maintenance Manual 9