Xylem HYDROVAR (HV2.1 - 3.45) - Manual (Page 24)

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Additional component line choke (coil)
Line coils are available as an option and should be mounted between the HYDROVAR and the
main fuse. The Line coil should be as near as possible at the HYDROVAR (max. 30 cm distance)
Advantages:
• better efficiency
• reduction of current harmonics
Applications:
• high short circuit currents
• compensation-plants without a coil
• asynchronous motors who are responsible for a voltage drop >20% of the line voltage
EMC summary
• Install potential equalization according local regulations
• Don’t install the motor-cable in parallel to the signal-cable or the power cable
• Use screened motor- and signal-cables
• Connect both ends of the screen of the motor-cable to the ground
• Connect only one end of the screen of a signal-cable to the ground
• Motor-cable as short as possible
• Use a motor-coil if the cable is longer than 20 meters (max. 100 meters motor-cable)
• Pigtails should be prevented
max. 30cm max. 2 m
Supply
Screened cable
GND
max. 100 m
motorcoil motor/pump
HYDROVAR line filter