--- product_id: 50434517 title: "4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch" brand: "elpro" price: "20 kr" currency: DKK in_stock: false url: https://www.desertcart.dk/products/50434517-4pro-ats-125a-50-60hz-automatic-changeover-transfer-switch store_origin: DK region: Denmark --- # 1-3 phase AC monitoring True RMS measurements External voltage adjustment 4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch **Brand:** elpro **Price:** 20 kr **Availability:** ❌ Out of Stock ## Summary > πŸ”Œ Power Up Your Reliability! ## Quick Answers - **What is this?** 4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch by elpro - **How much does it cost?** 20 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/50434517-4pro-ats-125a-50-60hz-automatic-changeover-transfer-switch) ## Best For - elpro enthusiasts ## Why This Product - Trusted elpro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Precision Monitoring:** Stay informed with true RMS voltage measurements. - β€’ **User-Friendly Design:** Easily adjustable external voltage settings for tailored performance. - β€’ **Compact & Lightweight:** Weighing only 4.31 kg, it's perfect for any installation. - β€’ **Built-In Safety Alarms:** Protect your generator with integrated alarms and warnings. - β€’ **Seamless Power Transition:** Experience uninterrupted power with automatic changeover. ## Overview The 4PRO ATS-125A Automatic Changeover Transfer Switch by ELPRO is a precision instrument designed to monitor 1-3 phase AC mains voltages with true RMS measurements. It features an external voltage adjustment capability and built-in alarms for generator protection, ensuring seamless power transitions and enhanced safety. ## Description DESCRIPTION The ATS-125A changeover switch is designed to automatically transfer load circuits from main power source to reserve source in a wide variety of 1-3 phase applications. FEATURES ο‚Ÿ Solenoid activated fast switching; ο‚Ÿ 1-3 phase 4 pole operation; ο‚Ÿ High reliability due to stable positions of the change-over mechanism energized during switching process only; ο‚Ÿ Front side position indication pointer and external lamp outputs; ο‚Ÿ Built-in mechanical and electrical interlocking; ο‚Ÿ Simple connection without external jumpers. TECHNICAL SPECIFICATIONS ο‚Ÿ Voltage: 230/400V(2-3 phase), 230V (1 phase), 120/208V(3 phase), 120/240V (2 phase). ο‚Ÿ Voltage frequency: 50/60Hz. ο‚Ÿ Switching poles: 4 ο‚Ÿ Phase current: up to 125А ο‚Ÿ Working temperature range: ΠΎΡ‚ -5'C Π΄ΠΎ +40'C ο‚Ÿ Humidity: up to 50% ο‚Ÿ Installation type: vertical ο‚Ÿ Switching current: up to 3.5A ο‚Ÿ Switching time: 200 ms ο‚Ÿ Weight: 4.2 kg INPUTS AND OUTPUTS ο‚Ÿ Normal source inputs: R, S, T, N; ο‚Ÿ Reserve source inputs: R, S, T, N; ο‚Ÿ Load cirquit outputs: R, S, T, N; ο‚Ÿ External indication lamp outputs. OPERATION Device monitors normal and reserve source phase voltages (internally connected to T and N terminal pairs). In case if there is the normal source phase voltage, the device connects the load circuits to the normal power source inputs. If the normal source phase voltage is lost, the device comes to a waiting mode keeping the load circuits connected to the normal power source inputs. In case if there is the reserve source phase voltage (while normal source phase voltage is absent), the device connects the load circuits to the reserve power source inputs. If the reserve phase voltage is lost, the device comes to a waiting mode keeping the load circuits connected to the reserve power source inputs. ## Features - Front panel mounted low cost precision instrument - Monitors the 1-3 phase AC mains voltages - True RMS measurements - Provides external voltage adjustment feature - Generator protection, built-in alarms and warnings ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01C3HB222 | | Brand | ELPRO | | Controller Type | Mechanical knob | | Current Rating | 125 Amps | | Item Weight | 4.31 Kilograms | | Manufacturer | ELPRO | | Material | PAI_(Polyamide_Imide), ABS_(Acrylonitrile_Butadiene_Styrene), PE_(Polyethylene) | | Mounting Type | Panel Mount | | Number of Items | 1 | | Operating Voltage | 230 Volts | | Unit Count | 1.0 count | ## Product Details - **Brand:** ELPRO - **Controller type:** Mechanical knob - **Current rating:** 125 Amps - **Material:** PAI_(Polyamide_Imide), ABS_(Acrylonitrile_Butadiene_Styrene), PE_(Polyethylene) - **Mounting type:** Panel Mount - **Number of items:** 1 - **Operating voltage:** 230 Volts - **Unit count:** 1.0 count ## Images ![4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch - Image 1](https://m.media-amazon.com/images/I/71I--EdbNHL.jpg) ![4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch - Image 2](https://m.media-amazon.com/images/I/81dHY9Gz2HL.jpg) ![4PRO ATS-125A, 50-60Hz Automatic Changeover Transfer Switch - Image 3](https://m.media-amazon.com/images/I/81T68cbf83L.jpg) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/50434517-4pro-ats-125a-50-60hz-automatic-changeover-transfer-switch](https://www.desertcart.dk/products/50434517-4pro-ats-125a-50-60hz-automatic-changeover-transfer-switch) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-05-14*