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 flickering 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 voltages, then follow the specified voltage on the
yellow sticker close to the cable entry.
• If the operation can be intermittent, such as S3 periodic duty, then the pump must be
supplied with monitoring equipment supporting such operation.
• 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.
• 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.
4.6.2 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.
4 Installation
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P7030, P7035, P7040 Installation, Operation, and Maintenance Manual
