Fruit Trader

For the observant :-

Sometimes one must think outside of the box and the ideal world it might portray on the inside. LED tube manufacturers have attempted to reduce risk of electric shock for the thousands of people who purchase and replace lamps every day of the week without the need for specialist training and test equipment. But in the case of LED tubes with removable safety tab, what happens if these people decide to remove the tube after the tab has been discarded? This is where risk assessment ends for some manufacturers while others have gone one step further and included a permanent isolation switch at the end of the tube.

LED tube plastic safety tabs. Double ended tube fittings have a live end and a neutral end. If the live end is inserted first there is risk of electric shock from the exposed neutral end before it enters enters the socket. The plastic guard tab isolates pins at one end thus eliminating the risk. The tab is removed once both ends of the tube are securely located in their sockets.

There are two models 500 and 550 one uses a AC motor to drive the gate the other DC. If your info is correct your gate is the 500 driven with a AC motor. Both of these models use DC signals at the limit switches but different style of switch mount which is why the listing has selection for 500AC and 550DC. PS The DC motor versions provide improved control of the gate and the ability to add battery backup on some models.

Both BSM and the Foresee F500 drive the gate gearbox with an AC motor. These AC motors are powered from the 220V side of the circuit board. In another area of the circuit board there are DC electronic circuits taking external inputs from limit switches etc which are then processed by logic control to decide what happens at the 220V AC motor side. Almost all gate controllers use low voltage DC signals in the limit switch circuit. The control board is not bothered if these signal come from a mechanical micro switch or magnetic reed type. The difference between switches in the links you provide is one is operated mechanically the other with magnetism.

Thats a good suggestion if the correct centre off switch arrangment is chosen. Problem is the limited space inside of these gate motor enclosures as I mentioned in an earlier post.

You have ordered a magnetic limit switch for the BSM brand gate motor. Apart from the outer case it's pretty much the same as what you originally suggested from AliExpress. AC in the product description does not mean the switch is an alternating current version. You will need two magnets and mounting brackets which I guess you have ordered separately. Like most of the magnetic gate control switches, the BSM version you have ordered is nothing more than two reed switches soldered to a circuit board as shown below. Inside the BSM magnetic switch module

I am not a Brit but have read a lot in the news about Tommy Robinson. First heard about him at the Oxford Union channel, interesting character.

The large blue signs on Sukhumvit Road mean after the intersection you are on a motorway. Motorcycles are not allowed on motorways so there should be no need for additional warning. But, as you pass through the Pattaya toll gate coming from Chon Buri there is an entrance to the motorway without any blue signs and an incorrectly positioned no motorcycles sign. In other words you drive onto the motorway then get a warning. The entrances to Thailand's toll free motorway sections are a mess of contradiction. Last time I passed through the tunnel there were warning signs on the right side. Its amusing to watch cars and trucks dodging slow moving food seller carts sneaking through the tunnel.

The control board has relays to control the motor already! The relays control motor direction while other circuits on the 220V side provide soft stop to limit gate hard closing. Inputs from limit switches tell the controller when to slow down and stop the motor. The controller can also use its relays to stop the motor if safety devices are triggered or excessive motor load detected. It's not really that difficult.

Where is the 220V that requires commanding via a 12V relay? This is an electronically controlled gate motor with logic level inputs for reading gate position. The OP is looking for more reliable limit switches for the low voltage inputs. He has suggested magnetic switches which is not a bad idea as many controllers now use this method.

The F-500 circuit board limit switch inputs will be passing a few milliamps when pulled down. Reed switches are more than capable for this application. I know this because the brother in law has sketches of the Chinese F-500 PCB diagram on file. F-500 low current low voltage inputs :-

Edit

A good quality whisker type limit switch could be a solution but the problem is you have limited space inside of the case to fit a more robust bulky switch bearing in mind the ideal switch location is inside of the enclosure away from rain. Below is example of a gate motor with magnetic limit switch. The switch sits close to the cover and the magnets mounted on the drive rail are strong enough to activate the magnetic reed switches. If you are capable and have the tools to make adjustments to the switch mount give the magnetic solution a try.

The limit switch inputs are pulled up to the positive rail, limit switch contacts pull them down to ground. Set meter to DC if you want to read the voltage on these terminals. As already mentioned, replace with same they are cheap enough to keep stock. If its only the micro switch that goes faulty they will be even cheaper.

Ignore the maximum rating on the existing micro switch (D45X 250V AC), it has nothing to do with the limit switch voltage used by your gate control PCB. The F-500 circuit board uses low voltage electronic inputs for the limit switch so you will be ok using the magnetic reed type switches rated at only 12V.

P-Real power Q-Reactive power. How normal reactive power (inductive capacitive loads) differs from active power feeding back to the grid from solar systems is a complex subject. The measurement of reactive power Q by some digital meters has in the past been a much talked about subject as it would allow electricity supply companies to charge customers for excessive reactive power. Spinning a mechanical meter backwards using grid tie inverters will give the appearance that a customer has used less electricity from grid than they actually have. Most electricity authorities will have a section in their regulations covering tampering with metering device. Attempting to argue with the fact that one has paid it back through net metering would be countered with several technical and administrative arguments possibly including meter accuracy. Having said that, it's likely most cases would be punished by fitting a digital meter, but if that were not the case I for one would not want to stand up in a Thai court and argue with a PEA legal team about spinning their meter backwards and connecting unauthorised supply to the grid.

Your response might not be getting through, I believe the toys went flying across the room a few days ago and us unknowledgeables are on the ignore list.

It is early days on this path into the unknown, so lets take a peek into the crystal ball and create a sign for the EV fuelling stations.

Both whites into L, black into L1, black into L2, brown into L3

I guess you are thinking why can't it start-up at minimum voltage. If not ignore my post. At start-up, inverters will be looking for a voltage that allows it to function within a window between the min and max range. If the inverter detected minimum voltage at startup it would be pointless initialising because any load would likely trigger continuous low voltage restarts. The induction load value is asking the installer to consider the high starting currents presented by some inductive loads.

Its called a confirmation, I looked a little more; as requested. English is not my native language, mostly US derived with a Euro twist. Finally, the OP had already found a solution by replacing the transformer's, no need for a 220V solution or associated drama.

Apology accepted. I occasionally post a trigger in the EV topics simply because some EV owners are taking the negatives far too seriously and forget the classic advice when participating in forum topics "don't feed the trolls" One must also consider how actions are perceived by others. Those not fully confident with their choices are often over sensitive to any criticism. Having said that, the road into the unknown can be stressful and even more so when you have people spooking you at every turn. PS For the confused, simplified version available upon request.