V&T V5 Series User Manual page 5

operation of the brake, also need to take full account of safety when brake faults. Inverter
adopted control circuit three class control logic&main circuit two class contactor control for the
aspect hardware of brake control. The three class control logic includes safety protection of
whole machine, security protection of machine structure and control operation of PLC and
inverter main circuit two class contacts are safety contactor and working contactor. Safety
contactors was controlled of interlock by safety protection of whole machine, security protection
of machine structure. Working contactor was controlled by PLC and control logic of inverter. In
normal security contactor keep
normally closed, brake release and engage was controlled by working contactor. In
dangerous situation security protection of the whole machine, security protection of
machine structure works. Safety contactors and working contactor will disconnect at same
time to ensure the closed brake.
Cilcuit breaker
◆ Smooth and reliable up-and-down speed
Unique speed torque control in process of acceleration and deceleration and perfect
reliable brake time sequence control function to ensure that the process of the up and
down more stable.
◆ Strong overload capacity
Taking the practical condition of crane equipment into account, V6-GH and V5-GH crane
dedicated inverter overload capacity is 1.2 times of universal heavy duty inverter. With the
more powerful overload capacity achieve excellent control effect.
◆ Has power optimization features
The inverter automatically calculates the weight of the load in the process of motor running
and figured out the maximum speed of motor when it carry the load. So that the motor
could running in high speed and working in the safety power. Maximize useful motor power,
ensuring safety while improving working efficiency.
◆ Position processing functionality and intelligence deceleration
function
By speed signal processing of PG feedback, it could automatic work out of the actual
position without additional device.And it could be precisely to the millimeter. Providing data
for position control such as intelligence deceleration, spot parkin, display the data. When
inverter power off, it can memorize the location.
Intelligent deceleration function is according to the user's setting or protection requirement
Safety contactor Working contactor
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