EM11 User’s Manual
1. Safety Information and Precautions
1
1. Safety Information and Precautions
In this manual, the notices are graded based on the degree of danger:
Danger
: Indicates that failure to comply with the notice will result in severe personal injury or even
death.
Warning
: Indicates that failure to comply with the notice will result in personal injury or property
damage.
Read this manual carefully so that you have a thorough understanding. Installation, commissioning or
maintenance may be performed in conjunction with this chapter. EMHEATER will assume no liability or
responsibility for any injury or loss caused by improper operation.
1.1 Safety Information
1.1.1 Before installation
Danger
Do not use damaged or missing components frequency inverter. Failure to comply will result in personal
injury.
Please use the electric motor with upper B insulation class. Failure to comply will result in personal
injury.
1.1.2 During installation
Danger
Install the frequency inverter on incombustible objects such as metal, and keep it away from
combustible materials. Failure to comply may result in a fire.
Warning
When two frequency inverters are laid in the same cabinet, arrange the installation positions properly to
ensure the enough cooling effect.
Do not drop wire residue or screw into the frequency inverter. Failure to comply will result in damage to
the frequency inverter.
1.1.3 wiring
Danger
Wiring must be performed only by qualified personnel under instructions described in this manual.
Failure to comply may result in unexpected accidents.
A circuit breaker must be used to isolate the power supply and the frequency inverter. Failure to comply
may result in a fire.
Ensure that the power supply is cut off before wiring. Failure to comply may result in electric shock.
Connect the frequency inverter to ground properly by standard. Failure to comply may result in electric
shock.
1. Safety Information and Precautions
EM11 User’s Manual
2
Warning
Never connect the power supply cables to the output terminals (U, V, W) of the Frequency inverter.
Failure to comply will result in damage to the frequency inverter.
Make sure that all the connecting wires comply with the requirement of EMC and the safety standard in
the region. Use wire sizes recommended in the manual. Failure to comply may result in accidents.
Never connect the braking resistor between the DC bus terminals (P+) and (P-). Failure to comply may
result in a fire.
1.1.4 Before power-on
Danger
Check that the following requirements comply with:
The voltage class of the power supply is consistent with the rated voltage class of the frequency inverter.
The input terminals (R, S, T) and output terminals (U, V, W) are properly connected.
No short-circuit exists in the peripheral circuit.
The wiring is fastened.
Failure to comply will result in damage to frequency inverter.
Cover the frequency inverter properly before power-on to prevent electric shock.
Warning
Do not perform the voltage resistance test on any part of the frequency inverter because such test has
been done in the factory. Failure to comply will result in accidents.
All peripheral devices must be connected properly under the instructions described in this manual.
Failure to comply will result in accidents.
1.1.5 After power-on
Danger
Do not open the frequency inverter’s cover after power-on to prevent from electric shock.
Do not touch the frequency inverter with wet hand and its peripheral circuit to prevent from electric
shock.
Do not touch the terminals of the frequency inverter (including the control terminals). Failure to comply
may result in electric shock.
Do not touch the U, V, W terminal or motor connecting terminals when frequency inverter automatically
does safety testing for the external high-voltage electrical circuit. Failure to comply may result in
electric shock.
Warning
Note the danger during the rotary running of motor when check the parameters. Failure to comply will
result in accidents.
Do not change the factory default settings of the frequency inverter. Failure to comply will result in
damage to the frequency inverter.