SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 10 Protective Functions
10-7
IN-65~75 Px Define, IN-82 DI NC/NO Sel : You can set the overheat trip function input by using the multi-function
terminal block input when using bimetal type sensor relay. Connect PTC between the terminal block to use and CM
and select No. 39 Thermal In among the function items. Select the type of contact point of the terminal used in IN-87
as 1(NC).
Using multi-function input terminal (Px)
PRT-36 Thermal-T Lev : sets the action level of the motor overheat sensor. In case of voltage input terminal(V1), the
maximum input voltage is 10V and in case of current(I1), the maximum input voltage is 5V. For example, if you use the
current input terminal and set the failure level at 50%, the protective function gets active when the voltage supplied to
the I1 terminal is below 2.5V. For how to operate it above 2.5V, see PRT-37 Thermal-T Area.
PRT-37 Thermal-T Area : If voltage lower than the thermal failure level(PRT-36) when you set at No. 0 Low, the
protective function becomes active and if No. 1 High, and if voltage higher than the failure level is input, the protective
function starts.
10.1.5 Inverter and sequence protection
1) Input/Output phase open Protection
The input phase open protection function is used to prevent over current through the inverter input terminal by input power phase
open. If phase open occurs to the connection between the motor and inverter output, motor stall might happen due to torque
insufficiency and that is why the output phase open protective function is used.
Group Code No. Function Display Setting Display Setting Range Unit
PRT
I Px
PTC
05 Phase Loss Chk - 11 - Bit
06 IPO V Band - 40 1~100V V
You can select input and output phase open respectively. If the dot mark of the switch is at the top, it represents setting
completed and if at the bottom, it does not operate (top:1, bottom:0).
bit setting(ON) : bit setting canceled(OFF) :
CM