Franklin Electric Cerus X-Drive, Инструкция по установке и эксплуатации

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OPERATION
Protection Features
78
No Flow Protection
The VFD can monitor a system flow switch to provide pump protection and more reliable sleep mode oper -
ation.
Flow Switch Terminal [IO–21 through 28]: Connect the flow switch to one of the Digital Inputs (MI1–8) and
set the corresponding parameter to
37 Flow Switch
.
No Flow Mode [IO–38]: Disabled, Trip, or Sleep. Default = Disabled.
Prime Time [IO–39]: Some pump applications require time for the pump to self-prime before the load sta -
bilizes. This setting adds a 0 to 6000 second delay before the VFD starts monitoring for Underload or No-
Flow conditions, which protects against nuisance faults. The delay operates at any VFD start, in both Hand
and Auto modes, including Run, Wake, Restart, or Reset commands.
No Flow Freq [IO–40]: Range from PID/VFD Freq Low Limit to PID/VFD Freq High Limit. Default= 20.0Hz
or 40Hz based on application.
When [IO–38] is set to
Trip and the VFD runs at a frequency greater than [IO–40] longer than [IO–39] with
the flow switch contact open, the VFD will trip on No Flow Fault. If the switch closes during the delay, the
delay timer will be reset and will start again if the flow switch contact opens again.
When [IO–38] is set to
Sleep , the flow switch will become an additional condition for sleep mode. When VFD
runs with PID control and determines that all sleep mode conditions are met and the flow switch is open
during Sleep delay, VFD will go into sleep mode.
Broken Pipe Protection (for Pump Applications)
The VFD has the ability to detect a broken pipe in the system. The VFD must be running with PID Control in
Auto mode for this feature to be active.
To enable this feature, adjust the following parameters:
Broken Pipe Level [SET–36]: 0.0 to PID F/B Max [Set–20]. Setting of 0.0 disables the feature. When pres -
sure falls below this level and VFD continues to run above [Set–37], delay timer [SET-38] starts.
Broken Pipe Freq [SET–37]: PID Low Freq [Set–22] to PID High Freq [Set–23] (default = 59.5 Hz).
Broken Pipe Delay [SET–38]: 0.0 to 6000 seconds (default = 180 sec). If either of the first two conditions is
removed, the timer will reset. If the timer expires with both conditions still active, the VFD will trip on Bro -
ken Pipe fault.
Manual or remote reset is required.