Sanhua SD2 Series, User Manual

Page: 5 / 48

Sanhua SD2 series drive
1 User Manual v3.5 –Sep-27.2022
1. WARNINGS
1.1 General warnings

Check whether the service voltage (rated voltage) matches with the power voltage before installing or using the
drives. If not, damages may be caused to the drive, and worse situations like fire disaster may take place as well.

Prior to the installation of drives, the capacity of power supply shall be figured out, making sure it is no less than the
working current required by those devices.

Installation and operation must be carried out after power off to safeguard personal safety and avoid electric shock.
After installation, check the devices to get rid of any fault and then power on for test run, during which, the device
performance and electric leakage shall be checked. Devices with body leakage shall be maintained in time and must
not be used in case of electric shock or personal injury.
1.2 Fundamental safety rules
Before performing any maintenance work:
Disconnect drive and external control circuits from the power supply, moving the main system switch to “off”. Wait
at least 5 minutes.
Always check, use a suitable multimeter, that there is no dangerous voltage across the terminals.
Always make sure the motor has stopped completely. Motors that are still freely rotating may produce dangerous
voltages at the drive terminals, even when this is disconnected from the power supply.
Check the temperature of the heat sink: coming in contact with the heat sink may cause burns.
When drive is connected to the mains, motor terminals (U, V, and W) are live, even if the motor is not running.
Do not measure insulation resistance or dielectric rigidity directly on drive, or with drive connected.
The control terminals are isolated from the mains voltage. Nonetheless, the relay outputs may have a dangerous
control voltage even when drive is not connected to the mains.
The level of safety provided by the enabling inputs on drive (excluding the “Safety Torque Off “input when used in
compliance with the standards) is not sufficient in critical applications without adopting further independent safety
measures. For all applications where malfunctions may cause serious harm to people and damage to things, the risks
must be assessed and additional safety measures adopted.
Product is required to be assembled by person with professional certificate according to certain electrical principle.
Any repair or replacement is required to done by manufacturer or its approved organizations.
Ensure correct earthing connections and cable selection as per defined by local legislation or codes.
T
he earth cable
must be sufficient to carry the maximum supply fault current which normally will be limited by the fuses or magnetic
MCB. Suitably rated fuses or MCB should be fitted in the mains supply to the drive, according to any local legislation or
codes.
Observe all the general and local safety standards concerning installations of high voltage devices, as well as the
regulations for the correct use of the personal protective equipment.