Power Electronics SD700SP Series, Hardware And Installation Manual

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SD700SP POWER ELECTRONICS
26
POWER CONNECTION
DC configuration
Proper DC safety equipment must be selected and correct connections must be done to ensure proper
operation. An incorrectly applied or installed drive can result in system malfunction or reduction in product
lifetime as well as component damage. You must read and understand this manual thoroughly before
proceeding.
Customer must install the following DC protections:
•
Isolation fault detector: To protect the photovoltaic field and the grounding equipment.
•
Surge arrester: To protect the electrical equipment from over-voltages.
•
On-load Breaker: To be able to open the circuit while the load on the system is connected.
•
Fuses: To provide overcurrent protection the equipment.
•
Blocking diode: To prevent the current from the grid flowing back the photovoltaic panels.
DC protections, solar kit components
Customer is responsible for installing the solar kit. For other options consult Power Electronics.
Topology
SD700SP drive operates according to the principle of pulse-width modulation (PWM). Varying the power
supply voltage and the grid frequency, it is possible to control the speed and torque of the connected
induction three-phase motors by means of its main components: rectifier bridge, the DC bus, inverter
bridge, and power and control board.