Best Methods for Determining Phase Sequence in a 3-Phase Socket for Hydraulic Pumps

Question

Hello,

I am asking for a hint with which methods are the best to determine the phase sequence in the 3-f socket. It is important to me to be sure that there is the correct sequence in the socket (e.g. for switching on the hydraulic pumps in the machine). Thank you for your help.

bava · Accepted Answer

With the help of a capacitor and incandescent lamps:

We mark one of the terminals with L1 and connect the branch with a capacitor to it. We connect branches with bulbs to the other two terminals. The L2 terminal is the one in the branch of which the bulb shines brightly, while the L3 terminal is the one in whose branch the bulb shines with a weaker light.

With the help of a choke and light bulbs:

Connect the branch with a choke to the terminal previously marked with a choke, to the remaining terminals of the bulb.
The L2 terminal is the one in the branch of which the bulb shines with a weaker light
The L3 terminal is the one in the branch of which the bulb shines more intensely.

Both systems are connected in a star pattern.
greetings

remik_l · Accepted Answer

You can do it with one of the following meters:

kkas12 · Accepted Answer

Hello! Let's not write such things. This is not always the case. The fact that the directions of rotation in the socket or in the sockets are standardized does not mean that every device or motor connected to it will spin in the same direction. Two identical devices plugged into the same socket do not have to spin in the same direction. Such determination of the direction in the sockets is good when it is used by the receiver / receivers adapted or assigned to this socket.

Madrik · Accepted Answer

Not only. It facilitates the subsequent service of receivers. It is enough to change the wires on the receiver plug once and we have the same direction of rotation all over the area.
For casual receivers, which cannot be modified, it is enough to make an adapter from the socket and plug, with the changed phase sequence. It is also a good solution for someone who often drives with his own receiver on different terrains. Either plugs into the socket directly or through an adapter - without a combination.

bava · Accepted Answer

Best Methods for Determining Phase Sequence in a 3-Phase Socket for Hydraulic Pumps

R1 = R2 = 1 / wC
We turn the system on for a short while so that the bulbs only flash because, as one of my colleagues said, there is a large asymmetry in the system, the next phase after the phase with the capacitor on is the one in which the bulb "flashes more"
I hope everything is clear now, best regards

Georges · Answer

Hello. Cheaper than the meter, the phase sensor will fall out in sequence. You will be sure that the motor will turn in the correct direction.

sq9jjh · Answer

Hello, what a new date this is phase sensor with sequence ? Maybe an example?

kkas12 · Answer

Hello!

The colleague did not come up with anything new.
Or maybe you should remember the old, proven way, when a self-respecting designer and electrician preceded the power socket with a switch? Of course, it could also be a spin-reverse switch.
And equip the device with appropriate gadgets that prevent it from starting when the speed is incorrect.

jekab · Answer

You are right, no one has come up with and will not come up with a device that by proper connection of the wires in the socket will guarantee that something will turn well. When it comes to gadgets, they exist, for example, in screw compressors.

forestx · Answer

- You can draw it / describe it more precisely - because I'm either blunt or ...

jekab · Answer

This is how it works, I checked, it gets a lot of asymmetry. I understand, but I can't understand

romix195 · Answer

He can just plug in the pump and check if it is in the right direction, and if not, reverse the phases.

forestx · Answer

OK - I have not read that it is fastened into a star - everything is clear.

efenix · Answer

Thank you for your interest and help.

retrofood · Answer

I close the topic.

Best Methods for Determining Phase Sequence in a 3-Phase Socket for Hydraulic Pumps

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