Must disconnect live part(mold surface including bushing)and connect main circuit terminal to ground for maintenance and inspection.
故障分析:変圧器が絶縁する時、変圧器の初級電流が急速に増大し、主回路のヒューズが溶けてしまう。
Fault analysis: When the transformer insulation breakdown,the primary current of the transformer increases rapidly, and the main circuit fuse is blown.
(SDC) SDC-750 The service disconnect is used to disconnect the main circuit when installing/ removing the battery module or during the maintenance work.
低損失パワーモジュールの採用により,主回路の電力損失を30%低減。
Power loss in the main circuit is reduced by 30% through the introduction of a low-loss power module.
At this power source changeover, however, an excessive surge voltage or rush current is generated,which adversely affects the main circuit components and transmits noise to the low-voltage control circuit..
For example in main circuit capacitors for industrial machinery inverters and servo amps, a series of two 400-V capacitors are used for 400-V AC input power supplies.
Also, the IPM is provided with diverse functions such as a prevention function for simultaneous turn-on of high side/low side IGBTs,enabling a highly reliable inverter main circuit to be designed using only fewer discrete parts.
Fault analysis: When the high-voltage bidirectional diode breaks down,the secondary transformer is directly disconnected, the main circuit fuse is blown, and the whole machine is powered off.
Epoxy embedded poles, or called embedded vacuum interrupters, vacuum interrupters with epoxy resin,is made by casting vacuum interrupters, main circuit conduct and mounting parts with epoxy into an integral part.
(Standard) The contactors are installed respectively to the positive terminal andnegative terminal of the main circuit to shut down the main circuit in response to instructions from BMU if an abnormality occurs in the battery.
Electrical overload protection: If the motor is abnormal or the circuit is abnormal and the motor is overloaded,disconnect the control circuit of the contactor to disconnect the main circuit.
Accumulator system(ACCUM), a battery-powered train systemJR East started commercial operation of theEV-E301 series cars with a high-capacity accumulator for the main circuit, called ACCUM, on the Karasuyama Line in March 2014.
In addition, each of the three phases contains an overcurrent protection circuit,thus enabling the area of the board used for the main circuit of the inverter to be reduced by about 15%, and its component count to be reduced by about 50% when the 3-shunt method is used.
The SCM1100M series allows the main circuit of the inverter to be configured with fewer discrete parts by integrating the following elements into a single package: the elements such as six power devices(IGBTs), three pre-drive ICs, and six flywheel diodes necessary for configuring the main circuit of the inverter, and also a bootstrap circuit(three bootstrap diodes and three boot resistors) as a high side drive power supply.
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