HD2 Series Inverter Safety Precautions
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The inverter should be used in proper environment (see section 4.2.1 Installation environment for
details).
Prevent the screws, cables, and other conductive parts from falling into the inverter.
As leakage current of the inverter during running may exceed 3.5mA, ground properly and
ensure the grounding resistance is less than 10Ω. The conductivity of PE grounding conductor is
the same with that of the phase conductor (with the same cross-sectional area).
R, S and T are the power input terminals, while U, V and W are output motor terminals. Connect
the input power cables and motor cables properly; otherwise, damage to the inverter may occur.
1.4.2 Commissioning and running
Disconnect all power sources applied to the inverter before terminal wiring and
wait for at least the time designated on the inverter after disconnecting the
power sources.
High voltage presents inside the inverter during running. Do not carry out any
operation on the inverter during running except for keypad setup. For products
at voltage levels of 4 or 6, the control terminals form extra-low voltage circuits.
Therefore, you need to prevent the control terminals from connecting to
accessible terminals of other devices.
The inverter may start up by itself when P01.21 (restart after power outage) is
set to 1. Do not get close to the inverter and motor.
The inverter cannot be used as "Emergency-stop device".
The inverter cannot act as an emergency brake for the motor; it is a must to
install mechanical brake device.
During driving permanent magnet synchronous motor, besides
above-mentioned items, the following work must be done before installation
and maintenance.
• Disconnect all the input power sources including main power and control
power.
• Ensure the permanent-magnet synchronous motor has been stopped, and
the voltage on output end of the inverter is lower than 36V.
• After the permanent-magnet synchronous motor is stopped, wait for at least
the time designated on the inverter, and ensure the voltage between "+" and
"-" is lower than 36V.
• During operation, it is a must to ensure the permanent-magnet synchronous
motor cannot run again by the action of external load; it is recommended to
install effective external brake device or disconnect the direct electrical
connection between permanent-magnet synchronous motor and the
inverter.
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