{"id":265189,"date":"2026-10-15T08:31:37","date_gmt":"2026-10-15T06:31:37","guid":{"rendered":"https:\/\/www.lovatoelectric.com\/?p=265189"},"modified":"2026-10-15T10:19:45","modified_gmt":"2026-10-15T08:19:45","slug":"keep-voltage-under-control-with-the-new-pmv45n-voltage-monitoring-relays","status":"publish","type":"post","link":"https:\/\/www.lovatoelectric.com\/gb_en\/keep-voltage-under-control-with-the-new-pmv45n-voltage-monitoring-relays\/","title":{"rendered":"Keep voltage under control with the new PMV45N voltage monitoring relays"},"content":{"rendered":"

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View all news<\/span><\/a><\/div><\/div><\/div><\/div><\/div>
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Keep voltage under control with the new PMV45N voltage monitoring relays<\/span><\/p>\n<\/div><\/div><\/div>

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Smarter voltage monitoring. More protection. Less complexity.<\/span>
\n<\/span><\/p>\n

Undervoltage, overvoltage, phase loss, neutral loss, incorrect phase sequence and voltage imbalance can all affect the reliable operation of three-phase electrical systems.<\/p>\n

The new LOVATO Electric PMV45N voltage monitoring relays<\/b> provide a compact, intelligent way to monitor key electrical parameters and help protect equipment against potentially damaging voltage conditions.<\/p>\n

Available in two versions – PMV45NA480 and PMV45NA480NFC<\/b> – the new multifunction voltage monitoring relays combine multiple protection functions in a space-saving one-module DIN housing<\/b>.<\/p>\n<\/div><\/div><\/div>

SEE THE RANGE<\/span><\/a><\/div><\/div><\/div>
WHERE TO BUY<\/span><\/a><\/div><\/div><\/div>
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\n<\/span>What are voltage monitoring relays?<\/span>
\n<\/span><\/p>\n

A voltage monitoring relay continuously checks the electrical supply against pre-set voltage conditions. When it detects a potentially problematic condition, its relay output changes state, allowing the appropriate protection or control action to be triggered.<\/p>\n

For three-phase systems, this can mean monitoring for conditions such as:<\/p>\n

\u2022 Minimum and maximum voltage
\n\u2022 Phase loss
\n<\/span>\u2022 Neutral loss
\n<\/span>\u2022 Incorrect phase sequence
\n<\/span>\u2022 Frequency variations
\n<\/span>\u2022 Voltage asymmetry<\/span><\/p>\n

Rather than waiting for an electrical problem to cause equipment downtime or damage, a voltage monitoring relay provides an additional layer of protection by identifying abnormal supply conditions.<\/p>\n<\/div><\/div><\/div>

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\n<\/span>Why use a voltage monitoring relay?<\/span>
\n<\/span><\/p>\n

Electrical supply conditions aren’t always predictable. A voltage monitoring relay can help you identify problems before they become bigger problems<\/b>, providing greater confidence in the operation of connected equipment.<\/p>\n

The PMV45N is particularly useful where maintaining the correct electrical supply is important to the performance and protection of machinery and systems.<\/p>\n

Its multifunction approach also means one compact device can perform several monitoring functions<\/b>, helping simplify panel design and installation.<\/p>\n<\/div><\/div><\/div>

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\n<\/span>Meet the PMV45N<\/span>
\n<\/span><\/p>\n

The new PMV45N range has been designed to provide flexible voltage monitoring for three-phase systems with or without neutral.<\/b><\/p>\n<\/div><\/div><\/div>

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–<\/b>
\n<\/span>PMV45NA480<\/span>
\n<\/span><\/p>\n

The standard version provides:<\/p>\n

\u2022 Minimum and maximum voltage monitoring
\n\u2022 Phase loss detection
\n<\/span>\u2022 Neutral loss detection
\n<\/span>\u2022 Incorrect phase sequence detection
\n<\/span>\u2022 Selectable rated voltages from 208 to 480VAC phase-to-phase
\n<\/span>\u2022 Minimum voltage threshold: 80 – 95% Ue
\n<\/span>\u2022 Maximum voltage threshold: 105 – 120% Ue
\n<\/span>\u2022 Adjustable tripping time delay: 0.1 – 30 seconds
\n<\/span>\u2022 Self-powered operation
\n<\/span>\u2022 One changeover relay output rated 8A, 250VAC
\n<\/span>\u2022 Compact one-module DIN housing<\/span><\/p>\n<\/div>

MORE<\/span><\/a><\/div><\/div><\/div>
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–<\/b>
\n<\/span>PMV45NA480NFC<\/span>
\n<\/span><\/p>\n

For applications requiring even greater monitoring flexibility, the PMV45NA480NFC adds:<\/p>\n

\u2022 Minimum and maximum frequency monitoring
\n\u2022 Voltage asymmetry monitoring
\n<\/span>\u2022 NFC programming via the LOVATO NFC App<\/span><\/p>\n

That means up to eight protection functions in a single product, with individual functions able to be enabled or disabled according to the application.<\/p>\n<\/div>

MORE<\/span><\/a><\/div><\/div><\/div>

With the LOVATO NFC App<\/b>, the PMV45NA480NFC provides a graphical interface for viewing functions and parameters directly on a smartphone.<\/p>\n

Digital setting of thresholds and time delays provides precise, repeatable configuration, while programmed settings can be saved and quickly copied to other relays – helping reduce the risk of configuration errors.<\/p>\n

Settings can also be protected with a password for added control.<\/p>\n<\/div><\/div><\/div>

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More monitoring. One compact solution.<\/span>
\n<\/span><\/p>\n

With its combination of multifunction protection, flexible settings and compact DIN rail design, the PMV45N range provides a practical solution for monitoring three-phase electrical systems.<\/p>\n

Whether you’re designing a new control panel or looking to add greater protection to an existing system, the new LOVATO Electric PMV45N voltage monitoring relays make it easier to keep critical voltage conditions under control.<\/p>\n<\/div><\/div><\/div>

Ready to take control of your voltage?<\/span>
\n<\/span><\/p>\n

Discover the new PMV45N range or speak to the LOVATO Electric team today. Call 01384 899700<\/b> to discuss your application.<\/p>\n<\/div>

WHERE TO BUY<\/span><\/a><\/div><\/div><\/div>

Frequently asked questions<\/span>
\n<\/span><\/p>\n

With its combination of multifunction protection, flexible settings and compact DIN rail design, the PMV45N range provides a practical solution for monitoring three-phase electrical systems.<\/p>\n

Whether you’re designing a new control panel or looking to add greater protection to an existing system, the new LOVATO Electric PMV45N voltage monitoring relays make it easier to keep critical voltage conditions under control.<\/p>\n<\/div>

<\/i><\/i><\/span>What does a voltage monitoring relay do?<\/span><\/a><\/h4><\/div>
\n

A voltage monitoring relay monitors an electrical supply for pre-set abnormal conditions, such as overvoltage, undervoltage, phase loss or incorrect phase sequence, and changes its relay output when a fault condition is detected.<\/p>\n<\/div><\/div><\/div>

<\/i><\/i><\/span>What systems can the PMV45N monitor?<\/span><\/a><\/h4><\/div>
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The PMV45N is designed for three-phase systems with or without neutral, with rated voltage options covering 208\u2013480VAC phase-to-phase.<\/p>\n<\/div><\/div><\/div>

<\/i><\/i><\/span>How many protection functions does the PMV45NA480NFC provide?<\/span><\/a><\/h4><\/div>
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The NFC version provides eight protection functions, including voltage, frequency, phase loss, neutral loss, incorrect phase sequence and asymmetry monitoring.<\/p>\n<\/div><\/div><\/div>

<\/i><\/i><\/span>Can the PMV45N be programmed using a smartphone?<\/span><\/a><\/h4><\/div>
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Yes. The PMV45NA480NFC can be programmed using the LOVATO NFC App, allowing parameters and functions to be configured digitally and settings to be saved and copied to other relays.<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":5,"featured_media":265326,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[701],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/posts\/265189"}],"collection":[{"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/comments?post=265189"}],"version-history":[{"count":15,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/posts\/265189\/revisions"}],"predecessor-version":[{"id":265357,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/posts\/265189\/revisions\/265357"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/media\/265326"}],"wp:attachment":[{"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/media?parent=265189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/categories?post=265189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lovatoelectric.com\/gb_en\/wp-json\/wp\/v2\/tags?post=265189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}