--- product_id: 133985529 title: "YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220)" brand: "ywbl-wh" price: "R1225" currency: ZAR in_stock: true reviews_count: 6 category: "Ywbl Wh" url: https://www.desertcart.co.za/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over store_origin: ZA region: South Africa --- # 12–600 V AC / 12–400 V DC universal detection Built-in LCD with real-time voltage & alerts Modular DIN rail mount, tool-free install YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) **Brand:** ywbl-wh **Price:** R1225 **Availability:** ✅ In Stock ## Summary > ⚡ Stay ahead of power fluctuations—protect your tech, power your peace of mind! ## Quick Answers - **What is this?** YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) by ywbl-wh - **How much does it cost?** R1225 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over) ## Best For - ywbl-wh enthusiasts ## Why This Product - Trusted ywbl-wh brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Real-Time Visual Monitoring:** Clear LCD display delivers instant voltage readings and fault alerts, enhancing on-site diagnostics without extra devices. - • **Universal Voltage Auto-Detection:** Seamlessly supports 12–600 V AC and 12–400 V DC inputs, eliminating manual range switching and reducing human error. - • **Plug & Play Industrial Integration:** Rail-mount modular design fits standard 35mm DIN rails for effortless installation and rapid system upgrades. - • **Optimized for Global & Regional Use:** Simplified Chinese interface boosts usability for technicians in diverse manufacturing environments, ensuring smooth operation. - • **Robust Protection for Critical Systems:** Automatically triggers backup power during voltage anomalies, safeguarding sensitive electronics and preventing costly downtime. ## Overview The YWBL-WH SVR1000 is a single-phase voltage monitoring sequence relay designed for industrial and residential power protection. Featuring a modular DIN rail mount, universal AC/DC voltage auto-detection (12–600 V AC, 12–400 V DC), and a built-in LCD display with real-time voltage and fault alerts, it ensures quick installation, reliable monitoring, and automatic backup activation to prevent equipment damage and downtime. ## Description YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220): desertcart.com: Industrial & Scientific Review: Very good product - Using it to monitor electric utility company low or high voltage to my house. If it is out of the ranges I programed into it, it will start my generator. The generator will run until the utility company electric power is back to normal voltage levels. Very easy wiring and setup. Review: Excelente - muy buena inversión puedes controlar la alimentación de la casa y evitar que se quemen los equipos electrónicos ## Features - Modular Design: Rail-mount modular structure enables quick installation in industrial control panels and DIN rail enclosures without custom brackets or tools. Standardized footprint fits common 35 mm DIN rails. Simplifies system integration and field upgrades across automation environments. Reduces wiring complexity and service downtime during deployment. - Universal Voltage Detection: AC/DC voltage auto-detection eliminates manual range switching before testing live circuits. Supports 12–600 V AC and 12–400 V DC input ranges. Prevents misconfiguration errors during maintenance on mixed-power systems. Enhances technician safety and measurement reliability in HVAC, solar, and factory settings. - Comprehensive Display: Built-in LCD shows real-time voltage values, fault alerts, and configuration menus in simplified Chinese characters. Screen resolution supports clear visibility at 12-inch viewing distance. Enables intuitive operation without external devices or translation apps. Improves usability for Chinese-speaking technicians in regional manufacturing sites. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | YWBL-WH | | Connector Type | Screw | | Contact Material | Copper Alloy | | Contact Type | Normally Open | | Current Rating | 6 A | | Mounting Type | DIN Rail Mount | | Specification Met | IEC/EN 60947 | ## Product Details - **Connector Type:** Screw - **Contact Material:** Copper Alloy - **Contact Type:** Normally Open - **Current Rating:** 6 Amps - **Mounting Type:** DIN Rail Mount ## Images ![YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) - Image 1](https://m.media-amazon.com/images/I/615CgIcHFQL.jpg) ![YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) - Image 2](https://m.media-amazon.com/images/I/61CrMSQQCeL.jpg) ![YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) - Image 3](https://m.media-amazon.com/images/I/61EOg4eLteL.jpg) ![YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) - Image 4](https://m.media-amazon.com/images/I/61q2nuag2ML.jpg) ![YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) - Image 5](https://m.media-amazon.com/images/I/61axE5kzj-L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: will this work for a car cooler to prevent battery drain and if so can I set the shut off at 13 volts?** A: Short answer is no. Min voltage is 17v so no it would not. However if you took say another 12v battery and wired it in series for 24 v but only use the other battery for emergency's you could use the 24v and set the cutoff at 22v and have the relay open in that instance it would kinda work but you would have to have a contactor for the battery connection because of the amperage of the starter. **Q: Is there a link for the MAnual/directions for Ad48?** A: It comes with a little piece of paper that explains the setup. It is a some device that is configured to activate a form "C" relay based upon a low and high voltage. Example: if the low is set to 48vdc and the high to 50vdc, the relay can be wired to be closed or open between those two voltages. **Q: Are the input and output contacts isolated? i want to bring in my battery voltage (48v dc) and if it gets low cut the 240v ac on the output contacts.** A: Yes the contacts are isolated from the input **Q: Can this is connected to a 120/240 volts power supply?** A: Yes. It can connect to 120v. Dc or Ac ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very good product *by D***7 on August 1, 2024* Using it to monitor electric utility company low or high voltage to my house. If it is out of the ranges I programed into it, it will start my generator. The generator will run until the utility company electric power is back to normal voltage levels. Very easy wiring and setup. ### ⭐⭐⭐⭐⭐ Excelente *by Y***Z on May 11, 2023* muy buena inversión puedes controlar la alimentación de la casa y evitar que se quemen los equipos electrónicos ### ⭐⭐⭐⭐⭐ Muy buen dispositivo *by C***G on December 23, 2023* Muy interesante y facil de configurar ## Frequently Bought Together - YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over-Voltage 50V-300V Under-Voltage 1V-90V AC/DC(AD220) - VAMRONE 10 Piece Aluminum DIN Rails, 12 Inches Long, 35mm Wide, 7.5mm High, Top Hat Slotted DIN Rail with RoHS, Extra Premium Screws Included for Hardware Components Mounting - TWTADE/JQX-62F-2Z Coil Voltage AC 110V 80A DPDT Electronmagnetic Relay,High Power Relay AC 110V --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over](https://www.desertcart.co.za/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-14*