Astraada DRV-22 inverters Installation guidelines
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Figure 3-9 NPN modes
If the signal is from PNP transistor, please set the U-shaped contact tag as below according to the used power supply.
Figure 3-10 PNP modes
3.3 Layout protection
3.3.1 Protecting the inverter and input power cable in short-circuit situations
Protect the inverter and input power cable in short circuit situations and against thermal overload.
Arrange the protection according to the following guidelines.
Figure 3-11 Fuse configuration
Note: Select the fuse as the manual indicated. The fuse will protect the input power cable from damage in short-circuit situations. It will protect the surrounding
devices when the internal of the inverter is short circuited.
3.3.2 Protecting the motor and motor cables
The inverter protects the motor and motor cable in a short-circuit situation when the motor cable is dimensioned according to the rated current of the inverter. No
additional protection devices are needed.
If the inverter is connected to multiple motors, a separate thermal overload switch
or a circuit breaker must be used for protecting each cable and motor. These
devices may require a separate fuse to cut off the short-circuit current.
3.3.3 Implementing a bypass connection
It is necessary to set power frequency and variable frequency conversion circuits for the assurance of continuous normal work of the inverter if faults occur in
some significant situations.
In some special situations, for example, if it is only used in soft start, the inverter can be conversed into power frequency running after starting and some
corresponding bypass should be added.
Never connect the supply power to the inverter output terminals U, V and W.
Power line voltage applied to the output can result in permanent damage to the
inverter.
If frequent shifting is required, employ mechanically connected switches or contactors to ensure that the motor terminals are not connected to the AC power line
and inverter output terminals simultaneously.
4 Keypad Operation Procedure
4.1 Keypad introduction
The keypad is used to control Astraada DRV-22 series inverters, read the state data and adjust parameters.
Summary of Contents for DRV-22
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