Earthing (Grounding); Earth (Ground) Conductor Length; Connect The Motor Cable To The Pump - Xylem FLYGT Flygt 2071 Installation, Operation And Maintenance Manual

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 70 mm ( 2.8 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.
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 nuts 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.
WARNING:
Do not install the starter equipment in an explosive zone unless it is explosion-proof rated.
Three thermal contacts are incorporated in the stator. They are normally closed.
Thermal contacts must never be exposed to voltages higher than 250 V, breaking current
maximum 6 A at a power factor 0.6. It is recommended that the thermal contacts are
connected to 24 V over a separate fuse to protect any other automatic equipment.
Flygt 2071 Installation, Operation, and Maintenance Manual
Installation
15