Practical skills of electrician skills, great!


1. Provisions for single-phase power socket wiring

There are a variety of single-phase sockets, often divided into two holes and three holes.
The two holes are arranged side by side, and the three holes are formed in a shape of a character.
The letter next to the wiring hole, L is the fire N is zero.
There is also E in the three holes, indicating that the ground is in the middle.
In the direction of the socket, the wiring of each hole is specified.
The left connected zero line is connected to the right and the protective ground line is connected to the center.


2, the choice of leakage protector

Select the leakage protector and the power supply mode is first.
Single-phase power supply 220, second-line secondary or single-stage.
Three-phase three-wire three-eighth, three-level protector is selected.
Three-phase four-wire three-eighth, four-wire three-level or four-level.
“Level” means that the switch contact “line” indicates the incoming and outgoing lines.


3, the reason why the light bulb does not shine

The light bulb is not bright, it is annoying, and the common cause is broken.
The transparent bulb can be seen, otherwise it can be tested with an electric pen.
When both ends of the switch point are closed, the fire line is not turned off.
When one light is off, the filament is broken, and both ends are turned off and the zero line is turned off.


4. Core inspection and breakpoint determination method before buried conductor is buried

Before the buried conductor is buried, there is no broken core disc inspection.
Check that the meter is used, and the L end is connected to the wire.
The other end of the wire is placed in the water.
Slowly shake the megohmmeter, the needle is less than zero is broken.
Find where the breakpoint is, use the instrument DG3,
One-phase AC is connected to one end, and the instrument is buried in the ground.
Slowly moving from head to tail, the lamp light is not broken,
If the instrument light is off, here is the disconnection point.

5, low-voltage electroscope to determine the method of AC single-phase circuit failure
The electric pen for AC electroscope is lit, and the fire line is not bright.
Circuit failures can be checked and energized to measure fire and ground.
When the device is turned on and off, the circuit is disconnected and unquestionable.
If both ends are not lit, the power line is disconnected.
If both ends are bright, the zero line breaks or detaches.

6. Method for measuring DC current with pointer multimeter
Zero before measurement, the range selection should be moderate.
Determine the positive and negative circuits, the serial wiring should be clear.
The black test lead is connected to the negative pole and the red test lead is connected to the positive.
If the hands are reversed, the wiring is positive and negative.


7. Method for measuring conductor DC resistance by pointer type multimeter

Measure the resistance selection range, select the range and then zero.
Two shorts to see the hands, not to adjust at zero.
Rotate the ohms zero button and the hand is zero.
There are still a number of knobs, and the battery is replaced and adjusted.
The contact must be good, and the two hands should be suspended.
The measured values ​​are guaranteed to be accurate and the hands are preferably in the grid.

Double Twisting Machine

Double Twisting Machine

Application:


The high speed machines mainly used for stranding copper wire, aluminum wire, steel wire, ACSR and wire rope. Accompanied with taping head, it can used for insulation cores and some control cable stranding process.
Component:

Central pay-off, cage host, taping device(optional), capstan, take-up and traverse device and electric control system.
Main Character:
1.The machine can work steadily with the whole holder, and the protect cover adopts high grade seamless steel tube, so the structure is also steady with lower noises.

2.The timing power can be manipulated easily to adjust the speed .The protect cover has the right and reverse direction circumrotate.

3. The main machine and the haul-off unit adopt shift gears case, so the working intensity is lower and the pitch is exact.

4. Equipped with automatic parking equipment -the safeguard, it means the machine will stop when the thread runs out or the door is open.

Double Twister Machine,Double Twisting Machine,Cable Stranding Machine,Double Twist Stranding Machine

ROYAL RANGE INTERNATIONAL TRADING CO., LTD , https://www.royalrangelgs.com