Frequency Inverter ST600 Series High-Performance Multifunction VFD Installation Guide
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4 Installation Guide
4.1 What this chapter contains
This chapter introduces the mechanical and electrical installations of the VFD.
⚫ Only well trained and qualified professionals are allowed to carry out the operations
mentioned in this chapter. Please carry out operations according to instructions
presented in 1 "Safety Precautions". Ignoring these safety precautions may lead to
physical injury or death, or damage to the device.
⚫ Ensure the VFD power is disconnected before installation. If the VFD has been
powered on, disconnect the VFD and wait for at least the time designated on the
VFD, and ensure the POWER indicator is off. Users are recommended to use a
multimeter to check and ensure the VFD DC bus voltage is below 36V.
⚫ Installation must be designed and done according to applicable local laws and
regulations. Sourcetronic does not assume any liability whatsoever for any
installation which breaches local laws and regulations. If recommendations given by
Sourcetronic are not followed, the VFD may experience problems that the warranty
does not cover.
4.2 Mechanical installation
4.2.1 Installation environment
Installation environment is essential for the VFD to operate at its best in the long run. The installation
environment of the VFD should meet the following requirements.
⚫ -10 – +50°C.
⚫ When the ambient temperature exceeds 40°C, derate 1% for every additional
1°C.
⚫ It is not recommended to use the VFD when the ambient temperature is above
50°C.
⚫ In order to improve reliability, do not use the VFD in cases where the
temperature changes rapidly.
⚫ When the VFD is used in a closed space, e.g. control cabinet, use cooling fan
or air conditioner to prevent internal temperature from exceeding the
temperature required.
⚫ When the temperature is too low, if restarting a VFD which has been idle for a
long time, it is required to install an external heating device before use to
eliminate the freeze inside the VFD. Failing to do so may cause damage to the
VFD.
⚫ The relative humidity (RH) of the air is less than 90%.
⚫ The max RH cannot exceed 60% in an environment where there are corrosive
gases.
The installation site should meet the following requirements.
⚫ Away from electromagnetic radiation sources.
⚫ Away from oil mist, corrosive gases and combustible gases.
⚫ Ensure foreign objects such as metal powder will not fall into the VFD (do not
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