|
|
|
|
|
|
|
|
Analysis on the wiring diagram of Fuji Inverter in Japan
|
|
Analysis on the wiring diagram of Fuji Inverter in Japan1 main circuit connection
1) the symbol G is the ground terminal of the frequency converter box, which is used to ensure the use of safety. This point should be grounded in accordance with the requirements of the national electrical code. The grounding resistance is no more than 4.
2) the power supply of the inverter is represented by T, S and R. Suggestions for the selection of air circuit breaker FAB with leakage protection is connected to the three-phase power supply, without considering the phase sequence connection. FAB switch is not allowed to start or stop the inverter, the panel operation keys should be used FWD, REV to control.
3) inverter power output terminals U, W, V said. According to the use of the requirements to determine the positive or reverse, if the steering is not right, any exchange of two phase can be. The output capacitor and surge absorber is prohibited. Motor and motor connection should not be too long, the power is less than 3.7KW length should be less than 50m, or to add line filter (0FL) (to buy).
4) terminal RO, TO-220 for auxiliary power supply control input, has two functions, one is for external connection of radio interference filter, second is used for regenerative braking of the (see the product description).
5) the DC reactor is connected with the terminal P1 and P (+), the purpose is to improve the power factor. When the two terminal is short circuit connection, when using the DC reactor, the first to remove, and then connected to the DC reactor (which is the purchase of a piece).
6) the external brake resistor is connected to the terminal P (+) and DB. When the power is not greater than 7.5kW, the inverter has a built-in brake resistance. When the frequent starting and stopping and potential energy load built capacity is not enough, need to use external resistor (optional), when the motor power is not less than 15kw, other than an braking resistance outside, in order to improve the braking ability, still need to increase braking unit (optional), connected to P (+) and n (-) (see production crystal instructions).
2 control terminal connection
1) external potentiometer, the power supply DC + 10V from 13 to 1 and the common terminal 11, with a ~ 5K potentiometer, for frequency setting.
2) to set the voltage signals can be inputted from the terminal 12 and common terminal 11, set frequency, input impedance is 22K, input voltage for DC0 ~ + 10V, also can input PID control of the feedback signal.
3) when the current signal is set, the Ai1 or Ai2 and the public terminal M can be transmitted from the terminal. The frequency setting, the output impedance is 250, the output current is 4 ~ 20mA, and the feedback signal of the PID control is also lost.
4) switch quantity input terminal FWD is forward of the start / stop Rev for inversion of the start / stop, X1 ~ x9 can be selected as the motor alarm, alarm reset, multi section of frequency selection and command signal, the terminal cm is the common point.
5) PLC signal power supply, by the terminal PLC and M output, PLC output signal power is DC24V.
6) the output of the transistor is Y4 ~ Y1, and the public terminal CME can output the monitoring signal, such as the signal of the running, the frequency arrival, the overload forecast and so on. The maximum current is 50mA when the transistor is turned on.
7) the total alarm output relay is 30A, 308, 30C output, the contact capacity is AC250V, 0.3A, can be used to control the alarm output, protect the action of the signal.
8) an optional signal output relay, which can be selected as the output signal of the Yl ~ Y4 terminal.
9) communication interface. TX (+) and TX (RS485) as the output terminal. Up to 31 inverters. Terminal SD is used for the communication wire shielding layer, and the terminal is in the electrical surface (not necessarily zero potential, but the public) in the circuit.
10) to prevent the transmission signal interference and general analog signal to shielding line and length as possible less than 20m or ferrite ring (in the same direction around 2 ~ 3 turns), and parallel 0.022 UG F, 50V capacitors, or the use of signal filter etc. way.
|
|
|
|
|
|
|
|
|
