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Operation in Safety
I. Operation in Safety
Hazard!
Inverter is not allowed to install in a place with flammable or explosive gases in case explosion may
be triggered off.
Only competent professionals can handle installation, wiring, operation and maintenance on inverter.
Inverter grouding terminal PE（
）shall be well connected to earth (grounding impedance not
more than 4Ω).
Shortcircuit is not allowed between common point (CM) and reference point (GND or AGND) for
inverter’s internal power supply and input zero line or inverter’s own “N” teminal.
Make sure that wiring is properly connected and cover-board is well fixed prior to inverter switch-on;
Do not touch inveter’s charged terminals with hands after it is switched on.
Swich off before conducting any wiring or maintenance.
No maintenance is allowed within the first 10 minutes after switch-off or when DC bus voltage
exceeds 36V. Do not touch internal circuit or components.
G
N
E
F
Warning!
Make sure for a proper input voltage with inverter before it is connected with power.
Do not drop such metal objects as screwdriver or screw into inverter.
Do not install inverter in a place with direct sunlight. Do not stem inverter’s vent.
Do not connect input power to Teminals U, V, W or PE, P, B (N).
No direct connection of braking resistor to Terminal P or N.
Control loop wiring shall be separate from power loop wiring to avoid possible interference.
I
U
Warning!
♦
Please read this manual carefully before any operation on inverter.
♦
Inverter should not be stored or installed where there is strong vibration, strong erosion, heavy
H
dust, high temperature or greater humidity.
♦
Regular check shall be required for a proper wiring with inverter’s input and output, and to make
sure that the other wirings of the equipment are not aging.
♦
♦
♦
Check is required for motor insulation resistance before installation and operation.
Extra cooling measures shall be necessary if motor often runs at low speed.
Braking resistor or braking unit shall be adopted to avoid frequent over-voltage or over-current in
case of negative-torque energy feedback.
♦
Neither variable resistor or capacitance should be connected to inverter’s output to improve
power factor。Do not install a breaker between inverter’s output and motor. Should a breaker
have to be installed, it shall be ensured that it works only when inverter output current reads
1