Manual Modular Phase Switch: DIN Rail, 20A+ Load Capacity, 4mm2 Wires, PF-431 Alternative

Is there a DIN rail switch that would do the same as automatic phase switches, e.g. PF-431, but would be manually operated, had a higher load capacity (min. 20A), did not require additional contactors and allowed for connection with 4mm2 wires?
Or maybe one of the 3 position modular switches would be suitable for this purpose?

Enter "manual phase switch" in google

Does such a switch work on the principle that when there is a voltage drop on one phase, it controls itself and switches to another with a higher voltage?
Maybe the author can specify what device he wants to use?

Yes, the switch changes phase on voltage failure or voltage drop below a certain threshold.
I was thinking of throwing something like this into the home switchboard.
Single-family house in the countryside, overhead line ... sometimes there is a phase missing.
However, the automatic devices available on the market have quite a few disadvantages:
Low load current, probably high failure rate, and apparently most devices do not have protection against phase-to-phase short-circuit.

I suppose the device would have been ejected after the first lightning storm that struck somewhere nearby ...

A manual switch would have no electronics and would be as reliable as an esy or differential.

Maybe it will suit you, in fact it is not over 20A but I think that 16A at home should be enough -> http://legrand.pl/produkt/przelacznik-woltomierza-4-pozycyjny
There is also SK603 just 20A -> https://www.annapol.com.pl/product_info.php?products_id=152702

If this Hager is fit for the purpose I'm writing about, it could be.
I do not see the switch position wiring diagram in the documentation.

Connect the output wire to any terminal of the ammeter?

robertcb wrote:

I do not see the switch position wiring diagram in the documentation

It's hard to find some clear info, I found only a diagram from which it appears that the switch is badly described because instead of L1 L2 L3 descriptions there should be symbols 3,5,7 on which the power is supplied.

robertcb wrote:

Connect the output wire to any terminal of the ammeter?

I would only check if any of the outputs marked 8 and 10 are not connected to the output of the ground symbol.

mawerix123 wrote:

I would only check if any of the outputs marked 8 and 10 are not connected to the output of the ground symbol.

It is also not known whether it is a direct or transformer switch ...

robertcb wrote:

It is also not known whether it is a direct switch or a transformer switch.

It cannot have transformers inside, for the simple reason it has three IN paths, but no OUT path

Ooo and silent like Russia, there is a connection diagram on the Russian hager website -> http://e-volta.ru/katalog/products/izmeriteln...ribory/perekljuchatel-dlja-ampermetra-20a400v

mawerix123 wrote:

Ooo and mute like Russia, there is a connection diagram on the Russian hager website -> http://e-volta.ru/katalog/products/izmeriteln...ribory/perekljuchatel-dlja-ampermetra-20a400v

This diagram shows that the switch is connected to the coils of current transformers on the phase conductors, one end of which goes to terminals 3, 5, 7 and the other ends are connected - to terminal 1.

There is no electrical diagram of the internal structure of this switch, as in this case:

http://www.hager.pl/katalog-produktow/rozdzia...i-kluczykowe/sk606/47585.htm?utm_source=print

Would such a connection of the switch be correct?

The one for 99% of transformers will not work - please analyze the diagrams of such switches manufactured by, for example, Spamel or Elektromet Dzierżoniów - they have a very complicated connection system due to the necessity to close the winding of two of the three transformers at the moment (Probably short-circuits to terminal No. 1). I suggest going to a good electrical wholesaler and ordering a connector, e.g. Spamel, with a specific program of connections in the rail version, with a cover, e.g.

http://www.spamel.com.pl/pl/produkty/laczniki-krzywkowe/SK20_S10

and e.g. version SK20-2.4419

Diagrams on the website - http://www.laczniki-krzywkowe.pl/

Best regards.

cinepi wrote:

have a very complicated connection system due to the necessity to short-circuit the winding of two of the three transformers at the moment (probably short-circuits to terminal 1)

You may be right, the same occurred to me today when I was wondering what the grounding switch was for.

Thus robertcb without confirmation of operation, however, this SK603 may not be suitable.

cinepi wrote:

and e.g. version SK20-2.4419

Or maybe a Sk20-2.632 switch this one will be the most appropriate.

I tried to connect the SK603, but it was BOOM

terminals:
Z - grounding
L1, L2, L3 - according to the description
8, 10 - ammeter terminals
xx - no connection

They are combined:
switch position 0: Z - L1 - L2 - L3 - xx - 10
position of the switch L1: Z - xx - L2 - L3 - xx - 10 and x - L1 - xx - xx - 8 - xx
L2 switch position: Z - L1 - xx - L3 - xx - 10 and x - xx - L2 - xx - 8 - xx
L3 switch position: Z - L1 - L2 - xx - xx - 10 and x - xx - xx - L3--8 - xx

But there is a simple way to remake this contraption from an ammeter switch to a phase switch

Here is the procedure:
1.Set the switch to ZERO
2. remove the bottom cover
3. slide out the switch assembly (no screw, ratchet, etc.)
4.remove the jumpers between contacts 1-5 and 5-7
5. steps 3, 2, but vice versa - it is useful to know what the setting was (from step 1).
6.connect L1, L2, L3 according to the description on the casing, and enjoy the selected phase on terminal 8.

More detailed information:
The switch assembly is three switches on one axle. The contacts are numbered on the following switches: 1-4, 5-8, 9-12.
Inputs: ground 5, L1 6, L2 2, L3 8; ammeter: 3, 7 (external terminal markings: 8, 10 respectively)
The jumpers are factory set: 1-5, 2-4, 3-11, 5-7, 6-10, 8-12, 9-11.
Position 0, shorted: 6-5, 8-7, 1-2.
L1 position, shorted: 8-7, 1-2, 9-10.
L2 position, shorted: 6-5, 8-7, 4-3.
L3 position, shorted: 6-5, 1-2, 11-12.

The cross-section of the jumpers (plates) is probably less than 1.5 mm2, as well as the jumpers in the form of cables (? 1.3 mm, if the caliper works well for me). Some cables are clearly thicker. I do not know how it relates to the declared 20 A.