Connecting a Three-Phase Motor to a Condor MDR3-EA Compressor: Cable Guide

Hello. I need help. I need to connect a new three-phase motor, to the compressor, the Condor MDR3-EA pressure switch. I am asking for help from professionals. How to pull cables?
IMG_201703...155623.jpg Download (2.35 MB) IMG_201703...154559.jpg Download (5.29 MB) IMG_201703...155124.jpg Download (2.92 MB) IMG_201703...154804.jpg Download (3.66 MB) IMG_201703...154540.jpg Download (3.41 MB)

Buddy, you connect in a star, which means:
U1- 1 phase
V1- 2 phase
W1- 3 phase
For the PE enclosure that is yellow and green after all.
The engine is now ready to be connected to the star so that the wires are connected.

The engine is already connected in a star, so you have to connect 3 wires to the switch (red, blue, yellow) and connect the 3 Phases on the other side. Do not forget to ground !!! which you connect to the motor housing.
If the engine has an incorrect rotation (direction), change the center of the center with the extreme phase.

Is a 4x2.5mm cable enough? I'm interested in the length of 2m? How to connect to a pressure switch? Please help.

it's a 2.2KW engine so that's enough.
I do not know what your pressure switch is showing the photo

The motor has a rated current of 4.61A for work in a star, so even 1.5mm2 would be enough.
For greater mechanical resistance, you can use 2.5mm2.

The pressure switch has 3 paths as well as you have 3 power phases (but I do not see the terminal markings).
L1, L2, L3 conductors of the power cable are connected to terminals 1, 3 and 5 of the circuit breaker - conventionally from the left.
The wires L1, L2, L3 of the cable to the motor are connected to terminals 2, 4, 6 of the circuit breaker - on the right side.
The PE wires of both wires are connected using the connections at the bottom (these two screws on the brass plate).
Remember about wire-end and eyelet terminals when connecting cables.

How to connect to the circuit breaker?

you combine everything together
power supply, main switch, pressure switch, motor

Thank you all for your help. The engine connected according to your instructions. However, he tries to move, but he does not. What is wrong? How to check the resistivity between the fans and the housing? What function should I use on a multimeter that? He lay a lot of time, maybe something is wrong with him? Please help.

The main question is whether the compressor is mechanically efficient and has the engine been correctly selected?

The engine is well chosen because I have already covered this topic. The engine does not want to run EVEN without load. What is wrong? What to check?

If you are sure that the motor connected correctly in the star for 3 phases, then in such a system you can only file complaints about the engine. How the motor behaves when you turn it on manually after disconnecting it from the power supply.

A motor with no power turns the hand lightly. After connecting directly to the power spins., But I'm afraid to leave it for longer on. That it will not be damaged. The engine lay for a long time (about 5 years) in a tin garage in a cardboard box on the plot. But I've had it at home for a month. It was not flooded, but could it have been damp?

If you have connected the motor directly to the power supply and it is working, you can clearly see that the compressor does not require it.

The engine I connected under force immediately after about 15-20 seconds the balloon started to fly, so I unplugged it. What can this cause?

meglie wrote:

What can this cause?

Damage, engine burn, maybe bad connection.

My friend megli , in the first post you wrote that it is a new engine in the meantime we find out that the engine is not so new, since it lay in terrible conditions it is not at all strange that it can be damaged and qualifies for rewinding.

120v in stars and on L1 and L3 115v all over the house

It is to disconnect (remove plugs from sockets) all expensive devices from the network, because they can be damaged. Now you have 120V, and in a moment it can be over 300V. I met a similar situation on the garage team, when on the power cable connection board (then 3x380v) the N (zero) wire of this cable got hot and zero was floating .. And report this fault to the ZE, because I suppose that the fault occurred before the meter.

meglie wrote:

The engine lay for a long time (about 5 years) in a tin garage in a cardboard box on the plot. But I've had it at home for a month. It was not flooded, but could it have been damp?

You brought the cold strong to a warm room on the winding occurred, condensed in the dew .... and connected to electricity . It was necessary to connect it before bringing it to the warm algae and heat it strongly.