Are you trying to find phase monitoring relays among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling phase monitoring relays on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 17 hours of research and did 56 phase monitoring relays tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best phase monitoring relays you can buy today
- Convenient Monitoring: The voltage relay can monitor its own operating voltage (true rms measurement).
- High Accuracy: The voltage relay has 8 adjustable rated voltages, and the voltage measurement accuracy is less than 1%.
- Application: Equipment and control (tower cranes, elevators, agricultural equipment, refrigerated trucks); prevent reverse of equipment; normal/emergency power switch; prevent phase failure of dynamic loads.
- LED Indicator: The working status of the voltage control relay is indicated by the LED indicator.
- Small Size and Easy to Install: The voltage relay is ultra-small and can be mounted on a 35mm DIN rail.
- Dependable Phase Monitoring: The DPA51CM44 3-phase relay monitors phase sequence and phase loss to ensure the proper functioning of motors and prevent damage from incorrect phase configurations.
- Strong AntiInterference Performance: Designed with excellent tolerance to electrical interference, this monitoring relay ensures stable Action in challenging environments, providing longterm reliability.
- Efficient Motor Defense: Helps maintain the continuous and efficient Action of motors by detecting phase loss or sequence issues, reducing the risk of motor failure and extending equipment lifespan.
- Compact and Easy Installation: With a compact design (8.1 x 6.7 x 1.75 cm), this monitoring relay is easy to install in a variety of systems, making it ideal for tight spaces and quick setups.
- Versatile Applications: Widely used in industrial applications such as motor Defense, elevators, air conditioning systems, and power systems, ensuring smooth Action across different sectors.
- Good performance: The DPA51CM44 three-phase monitoring relay has strong anti-interference performance, which helps to keep the motor working continuously and efficiently, and performs well during work.
- Function: The three-phase monitoring relay is used to detect phase sequence and phase loss. Neutral, phase loss and wrong phase sequence are not included, so it can be detected that all phases are present and the phase sequence is correct.
- Application: It is widely used in motor , elevators, air compressors, motors, distribution boxes, water pumps, oil pumps, central air conditioning units, power systems and other industries.
- Practical tools: Keep the motor working continuously and efficiently, and it is a very useful tool in daily life.
- Compact: It is small in size and can be installed anywhere in the room, saving a lot of space and easy to install.
- Product Type:Electronic Component
- Item Package Dimension:10.414 Centimeters L X 9.144 Centimeters W X 3.048 Centimeters H
- Country Of Origin: United States
- Item Package Weight:0.25 Pounds
- Function: This voltage relay has overvoltage, undervoltage, phase loss, phase sequence and unbalanced three-phase voltage .
- Practicality: This 3-phase voltage relay does not require an external power supply. Has practical functions: power delay, output test, etc.
- The Composition of This Product: Three-phase voltage protector, chronograph and counter are integrated in one relay.
- 2 rest modules are optional, manual and automatic.
- The LCD can display data for easy reading.
- 102A 3-Phase Voltage Monitor
- 【High Accuracy】: The voltage relay has 8 adjustable rated voltages, and the voltage measurement accuracy is less than 1%.
- 【Rated Voltage】: Rated Voltage up to 552AC Voltage measurement accuracy<1%.
- 【3-Phase Design】: This Current Monitoring Relay is designed with 3-Phase Monitoring Relay to provide a correct phase sequence, without neutral, phase Loss and Incorrect phase sequence, so it can detect when all phases are present and have the correct sequence
- 【Application】: Equipment protection and control (tower cranes, elevators, agricultural equipment, refrigerated trucks); prevent reverse operation of equipment; normal/emergency power switch; prevent phase failure of dynamic loads.
- 【LED Indicator】The working status of the voltage control relay is indicated by the LED indicator.
- Three phase voltage protector, chronograph and counter are integrated into one relay.
- It is equipped with protective functions for over-voltage, under-voltage, loss of phase, phase sequence and unbalanced three phase voltage.
- No external power requires.
- With useful functions: electricity delay, output test, etc.
- The LCD can show the data for easy reading.
- Product Type:Electronic Component
- Item Package Dimension:10.921 Centimeters L X 9.906 Centimeters W X 3.048 Centimeters H
- Country Of Origin: United States
- Item Package Weight:0.100 Pounds
- High Accuracy: The voltage relay has 8 adjustable rated voltages, and the voltage measurement accuracy is less than 1%.
- Application: Equipment and control (tower cranes, elevators, agricultural equipment, refrigerated trucks); prevent reverse of equipment; normal/emergency power switch; prevent phase failure of dynamic loads.
- LED Indicator: The working status of the voltage control relay is indicated by the LED indicator.
- Convenient Monitoring: The voltage relay can monitor its own operating voltage (true rms measurement).
- Small Size and Easy to Install: The voltage relay is ultra-small and can be mounted on a 35mm DIN rail.
- Small Size: This 3-Phase Monitoring Relay has a small compact size for easy and convenient use and install, and the size of the Monitoring Relay is 8.1 x 6.7 x 1.75 cm/3.1 x 2.6 x 0.6 inch, you can install it on any places around the room, saving a lot of place
- Multi-functioanl: This DPA51CM44 3-Phase Monitoring Relay has a widely use on the electric filed, and it can be applied to motor , elevator, air conditioning system, power system and other industries, very helpful tool during daily life
- Work Well: DPA51CM44 3-Phase Monitoring Relay features with strong anti-interference performance, so it helps maintain a constant and efficient work of the motor, it will provide an excellent performance during the working process
- 3-Phase Design: This Current Monitoring Relay is designed with 3-Phase Monitoring Relay to provide a correct phase sequence, without neutral, phase Loss and Incorrect phase sequence, so it can detect when all phases are present and have the correct sequence
- LED Indication: This DPA51CM44 Monitoring Relay features an LED indication for easier installation and trouble shooting, which permits a maximum degree of to be achieved for machines, plants and systems, and avoid far more significant subsequent damage, very convenient and useful
- 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.
- Features: Undervoltage protector integrates three-phase voltage protector, chronograph and counter in one
- Multifunction: The protection relay has protection functions such as overvoltage, undervoltage, phase loss, phase sequence, three-phase voltage unbalance, etc
- Practical functions: The voltage monitoring relay has functions such as start-up delay and output test. 2 rest module optional, manual and automatic
- Specification: Monitoring Circuit: L1, L2, L3; Rated voltage: 208-480V AC, 50/60Hz; Overvoltage setting range: 200-600V; Undervoltage setting range: 150-500V; Voltage hysteresis: 1-20V
- LCD Display: LCD data display, easy to read, no external power supply required
- Standard modular construction, rail mounted.
- LCD display shows voltage value, fault status, parameter setting.
- Real-time monitoring of three-phase overvoltage, undervoltage, phase error, phase loss faulty.
- Powered by the measuring circuit, no additional auxiliary power required.
- Timekeeping and counting function.
- Product Type:Electronic Component
- Item Package Dimension:10.921 Centimeters L X 10.16 Centimeters W X 3.048 Centimeters H
- Country Of Origin: United States
- Item Package Weight:0.3 Pounds
- Standard and Universal: The protector standard modular structure, 35mm rail installation, with ultra wide voltage design, universal for worldwide.
- 2 Reset Methods: The protector can be reset automatically or manually, choose according to different situations.
- Value Adjustable: The overvoltage, undervoltage, unbalance values can be adjusted, and each action time can also be adjusted.
- Multi : Real time monitoring, the protector has protections of overvoltage, undervoltage, voltage unbalance, phase error, phase loss, zero line disconnection.
- Multi Usage: The protector can be widely used in machine tool, crane, control cabinet, compressor, cutting machine, elevator, air conditioner, elevator, freezer, , charging pile, motor, etc.
- [Application]Apply to over voltage for electrical equipment or compressors, emergency/backup power switching control. according to the change of circuit voltage, such as AC/DC voltage relay for motor voltage loss and under-voltage , AC voltage relay for winding motor braking and reverse control, DC voltage relay for DC motor reverse and reverse braking, etc.
- [ Against Reverse ] It is applied to mobile device connection control, causing accidents in equipment against reverse , normal/emergency power switch, preventing phase failure of power load. This monitoring relay can monitor own working voltage.
- [High quality & Advantages]High accuracy, voltage measurement accuracy is ≤ 1%. 8 kinds of rated voltages are adjustable, can apply to voltages in all regions of the world. The working status of the relay is indicated by the LED indicator, which is simple and convenient. Ultra-small size and it is easy to install.
- [Convenient operat]The operating mode of 3 Phase Monitor Relay can be selected via the rotary knob.
- [after-sales service]--We stand behind all of our them with a product guarantee and promise to give you the best in customer care! If you have any issue about the 3 Phase Monitor Relay, please us by e-mail, we will try our best within 24 hours to reply.
- Product Overview The PMPU is a 3-phase Multifunction Monitoring Relay with SPDT, SPST-NC contact
How to choose a good phase monitoring relays
Does the idea of finding a fantastic phase monitoring relays make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in phase monitoring relays. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top phase monitoring relays products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top phase monitoring relays on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top phase monitoring relays brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top phase monitoring relays based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the phase monitoring relays were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good phase monitoring relays, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your phase monitoring relays.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting phase monitoring relays for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our phase monitoring relays. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what phase monitoring relays should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on phase monitoring relays.
