BENSHAW Rsi S Series, Инструкция по эксплуатации

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224
Learning Protection Features
Under Load Trip and Warning Setting Details
Code Description
Pr.27 UL Trip Sel Sets the inverter response when an underload fault occurs. When set to
0(None), the inverter does not detect the underload fault. If set to 1
(Free-Run), the inverter output is shut off and the motor coasts to a stop.
If set to 2 (Dec), the motor decelerates and stops when an underload trip
occurs.
Pr.25 UL Warn Sel The multi-function output terminals (Relay1 and Q1) can be set to
provide an underload warning. Set to Pr.25 to 1(Yes) and parameters
OU.31 and/or OU.33 for the multi-function output terminals to 7
(Underload). The terminals activate (close) when an underload condition
occurs.
Pr.26 UL Warn Time,
Pr.28 UL Trip Time
Delay times can be set for both the underload warning and trip
protective functions. This function does not operate if energy-saving
operation is activated at Ad-50 (E-Save Mode).
Pr.29 UL LF Level,
Pr.30 UL BF Level
•
Setting Heavy Duty
- Pr.29 does not apply when Pr.04 is set to heavy duty..
- Pr.30, the underload level (percentage) is based on the motor’s rated
current.
•
Setting Normal Duty
- Pr.29, the under load rate is based on twice the operation frequency of the
motor’s rated slip speed (bA.12 Rated Slip).
- Pr.30, the under load rate is based on the base frequency set at dr.18 (Base
Freq). An upper limit and lower limit is based on the inverter’s rated
current.
Pr.30
× 2 Rated slip Output frequency
Output current
×2
Pr.30
Pr.29
Rated slip
Base frequency
Output current
Output frequency