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*1 Use the variable torque patterns when there is a quadratic or cubic relationship
between the speed and load, such as in fan or pump applications. The user can
properly choose the desired (V/f) patterns (Sn-02=04, 05, 06,or 07) based upon
the load torque characteristics.
*2 In the fan or pump applications, the load torque have a quadratic or cubic
relationship between the speed and load. The inverter capacity rating can be
increased to a value that doubles its own specified capacity rating in some special
case. For example, a 1-Hp inverter can be used to drive a 2-Hp motor with same
voltage class. But, due to the real hardware limitation, 220V 3HP, 10HP and
440V 3HP can not be adapted any larger capacity.
(2) V/F curve selection (Sn-02)
• Set the inverter input voltage (Cn-01) first to match the power supply voltage. The
V/f curve can be set to ant of the following.
Sn-02= 00~14 : one of 15 pre-set curve patterns
= 15 : V/F pattern can be set by the user through setting of Cn-01~Cn-08
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