Xylem FLYFT P7900, Инструкция по установке, эксплуатации и обслуживанию

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• The thermal contacts must be connected to a protection circuit in accordance with the
product approvals.
• The thermal contacts or thermistors must be in use.
• The environment must be appropriate for medium-voltage (1.2–10 kV) cables and
electrical work.
• For FM-approved pumps, a leakage sensor must be connected and in use to meet
approval requirements.
• Specially approved pumps must be earthed (grounded) at the external grounding
(earthing) site on the outside of the drive unit, to meet approval requirements.
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.
4.5.2 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
longer than the phase conductors at both ends of the cable.
WARNING: Electrical Hazard
Risk of electrical shock or burn. You must connect an additional ground- (earth-) fault
protection device to the grounded (earthed) connectors if persons are likely to come into
contact with liquids that are also in contact with the pump or pumped liquid.
4.5.3 Connect the cables: Standard pumps with MAS 801
This procedure must not be used for Ex-proof applications. If the pump is Ex-proof, then use
the procedure that is described in
Connect the cables: Ex-proof pumps with MAS 801
.
4 Installation
P7900 Installation, Operation, and Maintenance Manual 25