Bradbury liftmaster mk1 - help please

[BBonus]

Hi,

I am hoping that someone may be able to help me. I am not an electrian, but have some knowledge. I have an old Bradbury liftmaster mk1 car ramp which I can not get working, it was last used about 10 years ago. I want to start using the ramp and need to get a Land Rover stored on it.

Its 3 phase and has a power supply, however, when I use the lever (or buttons that it presses) nothing happens.

On further investigation, I think that the problem is with the switch as no power seems to be going to the motor. I have looked at the switch (picture attached), the below component (apologies I dont know what it is) isnt making a connection. When I push it up, a connection is made and there is a buzzing noise but nothing happens.

Any help, advice or suggestions much appreciated.

 

[brianmoooore]

What kind of fuse arrangement supplies this?

 

[BBonus]

There is a fuse box and switch on the ramp which connects the main workshop board.

 

[brianmoooore]

What kind of fuses, and do they share with anything else? I suspect that there might be a blown fuse on one phase - one of the two that power the coil of the contactor.

 

[BBonus]

Hi, I have checked the phases with a multimeter. I get 100 volts on 1 and 3, and then 400 on 2. Is that enough power?

The fuses in the fuse box on the ramp look visually ok.

Thanks

 

[BBonus]

Checked the fuses on the main board and one had been removed. Motor spinning nicely and ramp working. Thank you for the guidance.