ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
PS220 232
Functions &
Features
VFD PROTECTION
Since the core functionality of the PumpSmart PS220 is that of a Variable Frequency Drive (VFD), it also provides the ability
to configure the on-board electrical parameters to provide a very high degree of Drive and Motor protection. It will iden-
tify and react to the most common electrical system upsets such as Undervoltage, Overvoltage, Overcurrent, Stall, Under-
load and Overtemp. Faults can be automatically re-set faults which can prevent “Nuisance Trips”. The default settings for
most all of the protection selections are set to Fault.
The settings that can be configured are as follows.
NOTE:
Please refer to the “Underload Control’ in this manual for more information on this topic.
Please refer to the “Auto Reset Function’ in this manual for more information on this topic.
1. Maximum current:
This value is predefined in the drive automatically during the setup of Basic Startup Wizard. This value should only be
adjusted DOWN. An example of this would be if you installed a Pump with a non-overloading motor you could lower this
value to prevent tripping. (Higher amp-draw at higher flow rates)
2. Overvoltage control:
This parameter enables the overvoltage control of the DC Bus. Fast braking of a high inertia load causes the voltage to rise
to the overvoltage control limit. To prevent the DC voltage from exceeding the limit, the overvoltage controller automati-
cally decreases the braking torque.
3. Undervoltage control:
This parameter enables the undervoltage control of the DC Bus. If the DC voltage drops due to input power cut off, the
motor torque will automatically be decreased in order to keep the voltage above the lower limit. By decreasing the motor
torque, inertia of the load will cause regeneration back into the drive. This mechanism acts as a power-loss ride-through
function.
4. Auto reset selection: (See also Fault Auto-Reset VFD)
This parameter setting selects faults which can be automatically reset. Auto reset selection is a 16-bit word with each bit
corresponding to a fault type. Whenever a bit is set to “1”, the corresponding fault can be automatically reset.
5. Number of trials:
This parameter setting defines the maximum number of resets allowed to be attempted in the time specified by Total trials
time. As many as 5 attempts can be made. Setting of zero disables this function.
6. Total trials time:
This parameter setting defines the allowable time period for the counting and resetting of the electrical fault conditions
configured. This parameter also limits the number of resets allowed during this time period.
7. Delay time:
This parameter setting defines the time that the PS220 will wait before attempting an Autoreset of the VFD Faults selected
in Autoreset selection.
The VFD Protection can be configured with the PumpSmart PS220 Configuration Wizard. To access this Wizard from the
Home Screen, follow the path: Menu>PS220 Configuration>Pump & VFD Protection>VFD Protection>