Honeywell NXS0003V35A2H1 Product Data page 16

NXS VARIABLE FREQUENCY DRIVES
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Optional application software
Several special application software are available for download form Honeywell support web
site free of charge. And also special features can be created with the built in PLC if required.
In below there is presented one of the most commonly used special applications Multimaster
PFC.
Multimaster PFC (Pump and Fan Cascade) Application
- Dedicated solution for parallel pumping applications
Unique on the market
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- Replaces traditional contactor systems and can perfectly work as a stand alone system
- Fully integrated in VFD
- Only 2-wire connection required between inverters - no additional hardware
- Recommended for main pumping, booster stations, watering systems, sewage water pumping
stations
Adds reliability, minimizes risk for interruptions, fully redundant
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- Functionality: PID, Autochange anytime, Sleep function
Fig. 10. Multimaster PFC system
- One NXS Converter for each pump
Integrated control of 2-3 pumps
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Redundant system
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- Higher Efficiency at low consumption hours
- Automatic alternation without pressure spikes
- Individual or common pressure sensor
Fewer parts than normal PFC application
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Uses Interlocks to take out pumps for service
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EN0B-0620GE51 R1107 16