LS ELECTRIC SV-iS7 Series, Руководство пользователя

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Using Protection Features
333
Code Description
between the terminal block to use and CM and select “39 (Thermal) ” In
among the function items. Select the type of contact point of the terminal
used in IN-87
as “1 (NC)”.
[Configuration using multi-function input terminals]
PRT-36 Thermal-T
Lev
Sets the operation level for the motor overheat sensor. For the voltage input
terminal (V1), the maximum input voltage is 10 V and for the current (I1), the
maximum input voltage is 5 V. For example, if you use the current input
terminal and set the failure level to 50%, the protection function is
performed when the voltage supplied to the I1 terminal is below 2.5 V. To
perform the protection function when the voltage supplied to the I1
terminal is above 2.5 V, refer to the PRT-37 Thermal-T Area.
PRT-37 Thermal-T
Area
If Low (0) is set and the motor overheat sensor input is smaller than PRT-36,
the protection function is performed. If High (1) is set and the motor
overheat sensor input is bigger than PRT-36, the protection function is
performed.
10.2 Inverter and Sequence Protection
10.2.1 Open-phase Protection
Open-phase protection is used to prevent overcurrent levels induced at the inverter inputs due
to an open-phase within the input power supply. Open-phase output protection is also
available. An open phase at the connection between the motor and the inverter may cause the
motor to stall, due to a lack of torque.
Group Code LCD Display Parameter Setting Setting Range Unit
PRT
05 Phase Loss Chk - 10 - Bit
06 IPO V Band - 40 1 – 100 V
Input and Output Open-phase Protection Setting Details