--- product_id: 133985529 title: "YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220)" brand: "ywbl-wh" price: "KD 12.30" currency: KWD in_stock: true reviews_count: 9 category: "Ywbl Wh" url: https://www.desertcart.com.kw/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over store_origin: KW region: Kuwait --- # 6A max switching current Built-in LCD for real-time monitoring Auto AC/DC voltage detection YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220) **Brand:** ywbl-wh **Price:** KD 12.30 **Availability:** ✅ In Stock ## Summary > ⚡ Stay ahead of power dips and spikes—protect your energy flow like a pro! ## 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?** KD 12.30 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/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 - • **Precision Protection:** Real-time single-phase over/under voltage monitoring safeguards your critical systems effortlessly. - • **Modular DIN Rail Design:** Standardized modular build for quick, clean rail-type installation—upgrade your setup in minutes. - • **Self-Powered Reliability:** Operates without auxiliary power—cut complexity, boost efficiency, and reduce maintenance. - • **Smart Hysteresis Control:** Customizable voltage hysteresis prevents relay chatter, delivering stable, reliable switching. - • **Seamless Voltage Vigilance:** Automatically detects AC/DC voltage—no manual switching needed, ensuring zero downtime. ## Overview The YWBL-WH SVR1000 is a cutting-edge single-phase voltage monitoring relay designed for industrial and solar applications. Featuring automatic AC/DC voltage detection, a clear LCD display for real-time voltage and fault status, and dual independent relays, it offers precise over-voltage and under-voltage protection. Its modular DIN rail design and self-powered operation make it an essential, hassle-free safeguard for your power systems. ## Description YWBL-WH SVR1000 Single Phase Voltage Monitoring Sequence Relay Over Voltage Under Voltage Protection Relay (AD220): desertcart.com: Industrial & Scientific Review: How this works - I've asked a lot of questions in the question and answer section of which some got answered some not. I just received the relay and think I have it figured out. Might save someone searching all over. My application is solar. I needed a relay to sense my battery voltage and if it drops to a certain voltage have a relay shut down or disconnect my inverter. The inverter is separate from my main house inverter. It's function is to power a Mr Cool Universal central air conditioner or a electric water heater. When the suns out my inverter solar charger charges at a higher voltage than the batteries are when the sun goes down. So I want the AC or Water Heater to be run by the Inverters 240 volt output. The inverter is a 48 volt DC (LiPo4) powered unit. While running the A/C or Water Heater the batteries are at 53.5 volts or above. When solar is removed the batteries drop to 53 volts which is the settled voltage on my 48 volt LiPo4 system. So the relay is the 48V/220V model which I will set to 53.5 volt under voltage thresh hold to trigger the bottom relay section to open turning off my inverter. My concern where does it engaged and close the relay again and would there be a loop as the A/C would pull the voltage down again. WELL there is a "hysteresis" setting! Had to look that one up, lol. That is basically the spread when it engages or disengage again. It has a range of 0.1-30V on the 48V model with a default of 2.0V. I can set it at say 0.3 to have the relay reset at 53.8V or wherever I like it. On top of that there's a manual, auto and auto timed reset. So it can auto reset on those parameters or I can have it auto reset with a timer buffer of 0-.999 seconds (17 minutes). The manual says the power on delay and the reset delay is the same thing. You can also set a delay time (same range) for the activation of over or under voltage. The other question I asked and the seller answered is are the relays independent of the input, and they are. Also the relays, 2 of them are independent of each other...nice! I was going to power a 80A 240V AC DPDT relay to disconnect the power out of the inverter to the A/C but after talking to Ean of Watts247 I am going to simply wire the relay parallel with the inverters on/off switch. Turns out even off the solar charger inputs from the panels to charge the batteries remain active. Review: Great Solar Controller - I have been running this for over a year and it has worked flawlessly. It is used in my Solar System to stop the Inverter from draining the battery. The Solar Panels charge the batteries during the daytime but if there are a few days with cloudy conditions then the battery does not get charged. This great controller then opens up the relay and that switches my transfer relay from the Inverter back to the Grid and I do not destroy my battery pack. Then once the sun comes out again, then this switches back to the Inverter. The great thing is it is totally automatic, and I do not have to bother with it. I purchased the 48 volt controller that goes with my LFP battery. ## Features - Modular Design: Features a standardized modular structure for rail-type installation. - Universal Voltage Detection: Automatically identifies AC/DC voltage with no need to manually switch. - Comprehensive Display: Utilizes a built-in LCD screen to display voltage values, fault statuses, and setting parameters in Chinese. - Advanced Monitoring: Monitors for single-phase over-voltage and under-voltage faults in real time. - Self-Powered: Requires no additional auxiliary power source. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PZD9WSL | | Best Sellers Rank | #219,954 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Phase Monitoring Relays | | Brand Name | YWBL-WH | | Coil Voltage | 90 Volts | | Connector Type | Screw | | Contact Current Rating | 6 Amps | | Contact Material | Copper Alloy | | Contact Type | Normally Open | | Current Rating | 6 Amps | | Customer Reviews | 4.6 4.6 out of 5 stars (45) | | Included Components | inc | | Manufacturer | YWBL-WH | | Maximum Switching Current | 6 Amps | | Minimum Switching Voltage | 1 Volts (DC) | | Mounting Type | DIN Rail Mount | | Number of Terminals | 2 | | Operation Mode | Automatic | | Part Number | shgbwqe94u-03 | | Specification Met | IEC/EN 60947 | | UPC | 703633820945 | ## 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) ## 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 ### ⭐⭐⭐⭐⭐ How this works *by W***R on July 10, 2022* I've asked a lot of questions in the question and answer section of which some got answered some not. I just received the relay and think I have it figured out. Might save someone searching all over. My application is solar. I needed a relay to sense my battery voltage and if it drops to a certain voltage have a relay shut down or disconnect my inverter. The inverter is separate from my main house inverter. It's function is to power a Mr Cool Universal central air conditioner or a electric water heater. When the suns out my inverter solar charger charges at a higher voltage than the batteries are when the sun goes down. So I want the AC or Water Heater to be run by the Inverters 240 volt output. The inverter is a 48 volt DC (LiPo4) powered unit. While running the A/C or Water Heater the batteries are at 53.5 volts or above. When solar is removed the batteries drop to 53 volts which is the settled voltage on my 48 volt LiPo4 system. So the relay is the 48V/220V model which I will set to 53.5 volt under voltage thresh hold to trigger the bottom relay section to open turning off my inverter. My concern where does it engaged and close the relay again and would there be a loop as the A/C would pull the voltage down again. WELL there is a "hysteresis" setting! Had to look that one up, lol. That is basically the spread when it engages or disengage again. It has a range of 0.1-30V on the 48V model with a default of 2.0V. I can set it at say 0.3 to have the relay reset at 53.8V or wherever I like it. On top of that there's a manual, auto and auto timed reset. So it can auto reset on those parameters or I can have it auto reset with a timer buffer of 0-.999 seconds (17 minutes). The manual says the power on delay and the reset delay is the same thing. You can also set a delay time (same range) for the activation of over or under voltage. The other question I asked and the seller answered is are the relays independent of the input, and they are. Also the relays, 2 of them are independent of each other...nice! I was going to power a 80A 240V AC DPDT relay to disconnect the power out of the inverter to the A/C but after talking to Ean of Watts247 I am going to simply wire the relay parallel with the inverters on/off switch. Turns out even off the solar charger inputs from the panels to charge the batteries remain active. ### ⭐⭐⭐⭐⭐ Great Solar Controller *by W***D on December 23, 2022* I have been running this for over a year and it has worked flawlessly. It is used in my Solar System to stop the Inverter from draining the battery. The Solar Panels charge the batteries during the daytime but if there are a few days with cloudy conditions then the battery does not get charged. This great controller then opens up the relay and that switches my transfer relay from the Inverter back to the Grid and I do not destroy my battery pack. Then once the sun comes out again, then this switches back to the Inverter. The great thing is it is totally automatic, and I do not have to bother with it. I purchased the 48 volt controller that goes with my LFP battery. ### ⭐⭐⭐⭐⭐ 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. ## 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.com.kw/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over](https://www.desertcart.com.kw/products/133985529-ywbl-wh-svr1000-single-phase-voltage-monitoring-sequence-relay-over) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-16*