V&T TS-I Series, Руководство пользователя

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TS − I Special servo drive for hybrid electro-hydraulic system of injection molding machine User Manual
12 Chapter 2 Installation and connection of servo driver
2.5 Description of Peripheral Devices for Main Circuit
Circuit breaker
The circuit breaker capacity shall be 1.5 ~ 2 times of the driver rated current.
The time features of the circuit breaker shall fully consider the time features of the driver overload
protection.
RCCB
Because the driver output is the high-frequency pulse, there will be high-frequency leakage
current. Special RCCB shall be used when installing RCCB at the driver input side.
It is suggested that B type RCCB be used, and the leakage current value shall be set to 300mA.
Contactor
Frequent contactor tripping will cause driver failure, so the highest frequency for contactor tripping
shall not exceed 10 times/min.
When a braking resistor is used, to avoid the overtemperature damage of the braking resistor, a
thermal protection relay with braking resistor overtemperature detection shall be installed to
disconnect the contactor at the contact control power side of the thermal protection relay.
Input AC reactor
or DC reactor
1. The driver power supply capacity is more than 600kVA or 10 times of the driver capacity.
2. If there is switch type reactive-load compensation capacitor or load with silicon control at the
same power node, there will be high peak current flowing into input power circuit, which
damages the rectifier components.
3. When the voltage imbalance of the three-phase power supply of the driver exceeds 3%, the
rectifier component will be damaged.
4. It is required that the input power factor of the driver shall be higher than 90%.
When the above situations occur, install the AC reactor at the driver input side or DC reactor to
the DC reactor terminal.
Input noise filter
The noise input from the power end to the driver and output from the driver to the power end can
be reduced.
Thermal protection
relay
Although the driver has motor overload protection function, when one driver drives two or more
motors or multi-pole motors, to prevent the motor overtemperature failure, a thermal protection
relay shall be installed between the driver and each motor, and the motor overload protection
parameter P9.16 shall be set to “2” (motor protection disabled).
Output noise filter
When the output of the driver is connected with noise filter, the conduction and radiation
interference can be reduced.
Output AC reactor
When the cable connecting the driver and the motor is longer than 100m, it is suggested to install
AC output reactor to suppress the high-frequency oscillation to avoid damaging motor insulation,
large leakage current and frequent driver protective action.