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Installation
Earthing (Grounding)
Electrical Hazard:
• You must earth (ground) all electrical equipment. This applies to the pump equipment,
the driver, and any monitoring equipment. Test the earth (ground) lead to verify that it is
connected correctly.
• If the motor cable is jerked loose by mistake, the earth (ground) conductor should be the
last conductor to come loose from its terminal. Make sure that the earth (ground)
conductor is longer than the phase conductors. This applies to both ends of the motor
cable.
• Risk of electrical shock or burn. You must connect an additional earth- (ground-) fault
protection device to the earthed (grounded) connectors if persons are likely to come
into physical contact with the pump or pumped liquids.
Earth (ground) conductor length
The earth (ground) conductor must be 100 mm ( 4.0 in.) longer than the phase conductors
in the junction box of the unit.
Connect the motor cable to the pump
CAUTION:
Leakage into the electrical parts can cause damaged equipment or a blown fuse. Keep the
end of the motor cable above the liquid level.
A gastight cable entry unit in the form of a wall stuffing box must be cast into the shaft wall
or shaft roof if any of the following conditions apply:
• The motor cable is run directly from the pump pit (without ground contact) to a space
outside of the explosion risk area.
• A non-gastight cast-in ground cable is run through a protective pipe underground to
an electric control box.
1. Check the data plate to see which connections are required for the power supply:
• Y
• D
• Y serial
• Y parallel
• Y/D
2. Arrange the connections on the terminal board in accordance with the required power
supply.
Do not use links (jumper strips) with the Y/D start.
Do not use links (jumper strips) with the 9 stator leads tandem-coupling.
3. Connect the motor conductors (U1, V1, W1, and earth (ground)) to the terminal board.
4. Make sure that the pump is correctly connected to earth (ground).
5. Make sure that any thermal contacts incorporated in the pump are properly connected
to the terminal board.
6. Install the cover.
7. Fasten the screws on the entrance flange so that the cable insertion assembly bottoms
out.
After you have connected the motor cable to the pump, connect the motor cable and the
control cable to the starter equipment.
18
Flygt 2400 Installation, Operation, and Maintenance Manual
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