In this video I will introduce you to CONTACTORS, also known as RELAYS (or RELAY-SWITCHES), with the great safety provided by the MECHANICAL INTERLOCK as well as the ELECTRICAL INTERLOCK, let's create together a DIY ATS switch for our photovoltaic system. In this way you will be able to evaluate whether to replace your ATS with this system. [ ! ] ATTENTION [ ! ] : in the test and in the creation of the connections of the diagram a Finder 95.75 socket was used which has the contacts ordered in the following way: NC, COM, NO - while the image shown refers to a Finder 95.05 socket which has the contacts ordered in a different way, that is (COM, NO, NC) - so follow the caption for the connections on any socket, do not take into account the microscopic silkscreens shown on the image of the socket. Sorry for the inattention! --- One step at a time, trying not to take anything for granted, we will create my photovoltaic system consisting of: 550W photovoltaic panels (5.5kW nominal) 6kW toroidal inverter approximately 14kW battery Subscribe to the channel to stay connected and not miss the next videos in this series. Thank you, Donatello ===== my diagrams always updated (with last update date) ===== https://drive.google.com/drive/folder... ===== the products used in this video ===== Schneider TeSys LC1D38 38A 3P 230Vac Contactor Amazon: https://amzn.to/3ZgN6Rq AliExpress: https://it.aliexpress.com/item/100500... Schneider TeSys LC1D 40A 4P 230Vac Contactor Amazon: https://amzn.to/48gAduD Schneider LAD9V2 Mechanical Interlock Amazon: https://amzn.to/3RhUQRl AliExpress: https://it.aliexpress.com/item/100500... Relay 230Vac 8A Finder 40.52.8.250.0000 on Amazon: https://amzn.to/3rfbkip Finder 95.05 (or 95.75) relay socket [ ! ] ATTENTION [ ! ] : the two models have the contacts arranged in a different order, follow the caption in the diagram. on Amazon: https://amzn.to/48hs09w Spring Quick Clamps on Amazon: https://amzn.to/469c4Vg CHINT Magnetothermic Differential NB2LE 6kA single module Amazon: https://amzn.to/44R9Eto AliExpress: https://it.aliexpress.com/item/100500... Fuse holder 5x20 with 2A fuse AliExpress: https://it.aliexpress.com/item/100500... YRO ATS switch (YRQ2PC-125PV) Photovoltaic Amazon: https://amzn.to/3riEwVG AliExpress: https://it.aliexpress.com/item/100500... TOMZ ATS switch (TOQ5-125/2) Generator Amazon: https://amzn.to/44MGknP Amazon (GEYA 63A): https://amzn.to/3rh1FYL AliExpress: https://it.aliexpress.com/item/400094... ATS switch GEYA (G2R) AliExpress: https://it.aliexpress.com/item/100500... RT18-32X 10x38 AC 32A fuse holder 690V with fuse Amazon: https://amzn.to/3Zpt6fx AliExpress: https://www.aliexpress.com/item/10050... ===== background music ===== Mogo Mogo / Stream of Melodies / Freesound Music (no copyright music): A Night Alone Aviation Hall Bet On It Book Bag By the Fireplace Dexters Decks Do It Like Benson Don't Spoil My Smoothie Dream Team Forget Me Not Jazz Club Just As Soon Members Only Nat King Cool Nighttime Stroll Privatissimo Sunny Vibes Slow & Mellow The Thought of You Thinking of You I was inspired to make this video by my pioneer channels, in the order in which I viewed their videos on the subject * Our friend the sun (Salvo) / @ilnostroamicosole DIY ENERGY (Gianni) / @energiafaidate credits * Salvo3615: for pointing out that the image of the plinth in the diagram has different silkscreen prints than indicated in the caption below (corrected).