How to draw distribution system diagram

Question 1: How to draw 1 and incoming lines: C65H-C50/4P+VE 100mA on the distribution system diagram?

According to the application, the demand coefficient Kx should be 1. When the total load is fully open, single-phase 63A is obviously not enough, so three-phase distribution should be chosen.

Wire feeder can also choose plastic case circuit breaker, the price is slightly higher.

Additional leakage tripping function, tripping current 100mA, semi-empirical estimation.

Incoming cable, optional YJV-5* 16.

2. Outgoing:

WL 1~3 is 1 group, and L 1, L2, L3 and * * * are respectively connected in series behind the outgoing circuit breaker of contactor KM 1.

WL4~6 is 1 group, L 1, L2, L3 (original symbol L4~6 is wrong), * * uses contactor KM2, and the wiring is the same as above.

Contactor model, KM 1: 3TF46 or STF47；; KM2 optional: 3TF32. Either 380 volt or 220 volt coils are acceptable.

3. Time control:

Select KG3 16T, and you can set several time periods to control KM 1 and KM2 respectively.

4. Line:

The original WL 1~3 is enough; Theoretically, the conductor cross section of WL4~6 can be 4mm2, but it can be kept to avoid long-term voltage drop.

5. Add:

It is suggested that the distribution box be equipped with manual-time control conversion;

If all lamps are switched on and off at the same time, it is recommended to use 1 contactor to connect into the incoming line (behind the circuit breaker and in front of the bus), 3TF47.

Complete distribution box system diagram, also need to draw the box (rectangular frame), marked with grounding terminals, etc.

Question 2: power distribution system diagram interpretation system diagram is not so easy to explain ... each part has a specific meaning.

Three-phase five-wire power supply, PE line and N line are repeatedly grounded.

Pe is rated active power, cos is power factor, Pjs is calculated active power and Ijs is calculated current.

Incoming cables are: working phase (live wire) 3-core copper core cable with a cross-sectional area of 50m2, neutral wire 1 copper core cable with a cross-sectional area of 50m2, protective wire 1 copper core cable with a cross-sectional area of 25mm2.

125A/3P means that the incoming circuit breaker is 3P, the rated current is 125A, and the leakage protection switch of 50A/4P is 4P, 0.3A and 0.3s. ..

N-wire is safely grounded through circuit breaker and breakdown.

Distribution load: Go to the home through the 2P circuit breaker-watt-hour meter-BV line, wear PVC pipe, and WC is buried along the wall. The diameters of switches and wires are different with different loads.

It is suggested that the landlord understand it himself first, and then ask targeted questions, otherwise it will be too general. ...

So many L2's should be a clerical error in drawing, and the three-phase load should be evenly distributed. For example, three households on the first floor take L 1/L2/L3 respectively, or 1 on the second floor, L 1, L2 on the third and fourth floors, and L3 on the fifth and sixth floors.

Calculated load refers to the rated load multiplied by the demand factor and the simultaneous factor. The simultaneous coefficient of civil lighting is 1, and the demand coefficient Kx is written as 0.7, which is 108*0.7* 1=75.6.

The calculated current refers to the current corresponding to the calculated load, ijs = pjs/u/1.7wow2/cos = 75.6/0.38/1.732/0.9 =127.6285a.

The rated power 108kW is estimated according to the usual civil load, and each household is estimated to be 6KW. * * Ignoring the load, 6* 18= 108KW.

Pure hand-beating, helpful, is expected to be adopted.

Question 3: Help ~ How to draw such a diagram on the electrical system diagram?

Your instructions didn't say whether it was a single-phase or three-phase device. As shown in the figure, 1P switch is used for single phase and 3P switch is used for three phases. Calculate the current according to the power of the equipment, and select the switch and cable.

Question 4: How to draw the distribution box system diagram? 10 minute 1, incoming line: C65H-C50/4P+VE 100mA.

According to the application, the demand coefficient Kx should be 1. When the total load is fully open, single-phase 63A is obviously not enough, so three-phase distribution should be chosen.

Wire feeder can also choose plastic case circuit breaker, the price is slightly higher.

Additional leakage tripping function, tripping current 100mA, semi-empirical estimation.

Incoming cable, optional YJV-5* 16.

2. Outgoing:

WL 1~3 is 1 group, and L 1, L2, L3 and * * * are respectively connected in series behind the outgoing circuit breaker of contactor KM 1.

WL4~6 is 1 group, L 1, L2, L3 (original symbol L4~6 is wrong), * * uses contactor KM2, and the wiring is the same as above.

Contactor model, KM 1: 3TF46 or STF47；; KM2 optional: 3TF32. Either 380 volt or 220 volt coils are acceptable.

3. Time control:

Select KG3 16T, and you can set several time periods to control KM 1 and KM2 respectively.

4. Line:

The original WL 1~3 is enough; Theoretically, the conductor cross section of WL4~6 can be 4mm2, but it can be kept to avoid long-term voltage drop.

5. Add:

It is suggested that the distribution box be equipped with manual-time control conversion;

If all lamps are switched on and off at the same time, it is recommended to use 1 contactor to connect into the incoming line (behind the circuit breaker and in front of the bus), 3TF47.

Complete distribution box system diagram, also need to draw the box (rectangular frame), marked with grounding terminals, etc.

Question 5: How to draw the distribution system diagram? C45N-20A/ 1P (Meilan Rilan produced by Schneider Company, with trip curve of type C and rated current of 1-63A, 20A), BVV-500 (2 * 4+1*1.5) WC/. )

Question 6: How to draw the distribution system diagram? Know the load first, then determine the current according to the load, then determine the switch, and then determine the wiring and piping. This is a system diagram.

Question 7: How to draw the distribution system diagram? First, you should be familiar with the symbols of electrical components, and then find some drawings. According to other people's trial diagrams, you will get familiar with them.

Question 8: How to learn to draw an electrical system diagram? Know the load first, then determine the current according to the load, then determine the switch, and then determine the wiring and piping. This is a system diagram.

Question 9: How to draw electrical system diagram with CAD? We used Tianzheng Electric 8.0 and CAD2006, that is, Tianzheng Electric 8.0 the next day, and then installed it in the CAD directory. There are a lot of strong and weak electricity and line symbols in it.

Question 10: How to draw the primary system diagram of low-voltage distribution cabinet? The upper three lines are parallel and lead to the lower three lines.

The three switches are connected by dotted lines, and K 1 is enclosed by dotted lines to indicate the circuit breaker.

Next, introduce three horizontal parallel lines into the following circuit breakers respectively.