{"id":2026,"date":"2022-05-05T07:21:09","date_gmt":"2022-05-05T07:21:09","guid":{"rendered":"http:\/\/www.espowercorp.com\/public_html\/test\/?page_id=2026"},"modified":"2026-05-08T03:33:59","modified_gmt":"2026-05-08T03:33:59","slug":"digital-ac-voltage-monitoring-relay","status":"publish","type":"page","link":"https:\/\/www.espowercorp.com\/en\/digital-ac-voltage-monitoring-relay\/","title":{"rendered":"Digital AC Voltage Monitoring Relay"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"2026\" class=\"elementor elementor-2026\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0c51b21 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no elementor-invisible\" data-id=\"0c51b21\" data-element_type=\"section\" data-settings=\"{&quot;animation&quot;:&quot;zoomIn&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1ba0246\" data-id=\"1ba0246\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a8744f7 elementor-widget elementor-widget-spacer\" data-id=\"a8744f7\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-27e0f32 elementor-widget elementor-widget-image\" data-id=\"27e0f32\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1455\" height=\"448\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01.png\" class=\"attachment-1536x1536 size-1536x1536 wp-image-11479\" alt=\"\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01.png 1455w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-300x92.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-1024x315.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-768x236.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-18x6.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-24x7.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-36x11.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2023\/10\/ESPAN-LOGO-01-114x35.png 114w\" sizes=\"(max-width: 1455px) 100vw, 1455px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bf753c elementor-widget elementor-widget-text-editor\" data-id=\"6bf753c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>SD-BD-04-02\/Rev.11\/30-04-69<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-78a9914f elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no elementor-invisible\" data-id=\"78a9914f\" data-element_type=\"section\" data-settings=\"{&quot;animation&quot;:&quot;zoomIn&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-48947b2b\" data-id=\"48947b2b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-209f96e7 elementor-widget elementor-widget-image\" data-id=\"209f96e7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/www.esptechno.com\/main\/espan-6\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"http:\/\/www.59669726-4-20190319225146.webstarterz.com\/ESPOWER\/wp-content\/uploads\/2022\/05\/espan-edited.png\" title=\"\" alt=\"\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3f40197c elementor-hidden-phone elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"3f40197c\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5c96971d\" data-id=\"5c96971d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2df1b832 elementor-widget elementor-widget-heading\" data-id=\"2df1b832\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-medium\">DIGITAL AC VOLTAGE MONITORING RELAY<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f5c026 elementor-widget elementor-widget-easymeals_core_separator\" data-id=\"4f5c026\" data-element_type=\"widget\" data-widget_type=\"easymeals_core_separator.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"qodef-shortcode qodef-m  qodef-separator clear\">\n\t<div class=\"qodef-m-line\" style=\"border-color: #0A79A1;border-style: solid;width: 70px;border-bottom-width: 3px\"><\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-34de564e elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"34de564e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-466faf6d\" data-id=\"466faf6d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-345a573a elementor-widget elementor-widget-image\" data-id=\"345a573a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"828\" height=\"679\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A.png\" class=\"attachment-full size-full wp-image-16287\" alt=\"ESP, ESPAN, E27A, Voltage Monitoring Relay, \u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07\u0e15\u0e23\u0e27\u0e08\u0e08\u0e31\u0e1a\u0e41\u0e23\u0e07\u0e14\u0e31\u0e19\u0e44\u0e1f\u0e2a\u0e39\u0e07\u0e2b\u0e23\u0e37\u0e2d\u0e15\u0e48\u0e33\u0e01\u0e27\u0e48\u0e32\u0e1b\u0e01\u0e15\u0e34\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A.png 828w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-300x246.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-768x630.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-15x12.png 15w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-24x20.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-36x30.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/ESP-ESPAN_E27A-43x35.png 43w\" sizes=\"(max-width: 828px) 100vw, 828px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-360e6744 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"360e6744\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18171c47\" data-id=\"18171c47\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ad523b6 elementor-widget elementor-widget-spacer\" data-id=\"ad523b6\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d505a13 elementor-widget elementor-widget-heading\" data-id=\"d505a13\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Description<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fc4a734 elementor-widget elementor-widget-text-editor\" data-id=\"5fc4a734\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-family: lato; font-size: 14pt;\"> &nbsp; &nbsp; The AC voltage monitoring relay is a digital relay and designed to monitor a three-phase supply and single-phase supply by checking all phase are pleasant and within set voltage limit. An adjustable time delay is incorporated to avoid nuisance tripping. When power is applied to relay, the green LED will illuminate (Healthy function) or watchdog function is working. The relay is provided with an adjustable voltage of 80 ~ 100% Un on under voltage unit and 100 ~ 120% Un on over voltage unit with time delay 0 ~ 60 seconds set point.<\/span><\/p>\n<h4><span style=\"font-family: lato; font-size: 14pt;\"><strong>Under Voltage Function (27)&nbsp;<\/strong><\/span><\/h4>\n<p><span style=\"font-family: lato;\">&nbsp; &nbsp; &nbsp;<span style=\"font-size: 14pt;\"> &nbsp; &nbsp;When the monitor voltage falls below the set point, the time delay is started and the red LED (Under voltage LED display) start flashing until time delay has reached the set point value. (The response time of the relay is adjustable between 0 to 60 seconds) Then the red LED stop flashing but steady on, simultaneously with relay energizes or switches to its operating position. The relay will automatically reset once the monitored voltage rises above the set point. When reset, the LED will extinguish at the same time if time delay is not activated.<\/span><\/span><\/p>\n<h4><span style=\"font-family: lato;\"><strong>Over Voltage Function&nbsp; (59)<\/strong><\/span><\/h4>\n<p><span style=\"font-family: lato; font-size: 14pt;\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;As it is common with all AC voltage monitoring relays, on over voltage unit the relay energizes when the monitor voltage exceeds and the response value is selected, the time delay is started and the orange LED (Over voltage LED display) start flashing until time delay has reached the set point value. Then the orange LED stop flashing but steady on, simultaneously with relay energizes. The relay will automatically reset once the monitored voltage falls below the set point. When reset, the LED will extinguish together in case of time delay is not activated.<\/span><\/p>\n<h4><span style=\"font-family: lato; font-size: 14pt;\"><strong>Auxiliary Supply<\/strong><\/span><\/h4>\n<p><span style=\"font-family: lato; font-size: 14pt;\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;This type is also designed to use with the auxiliary supply source from 90 to 250 VDC. In case of AC voltage from VT or main source are failed, the relay still working (LED status of relay is still display when AC input voltage are failed)<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db21d7a elementor-widget elementor-widget-text-editor\" data-id=\"db21d7a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Sequence voltage relay function (47)<\/strong><\/p><ul><li>Phase-sequence relays are essential for power system protection Monitoring phase rotation in three-phase systems to prevent equipment damage from incorrect phase sequences. These relays are applied in motor protection, pump control, generator synchronization, elevator control, etc.<\/li><li>They work by detecting the correct phase rotation and signading anomalies, using technologies like eletromagnetic, static, or microprocessor-based systems<\/li><li>Implementing them ensures equipment safety, reduces dowtime, and enhances overall power system safety<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-be8e1e8 elementor-widget elementor-widget-spacer\" data-id=\"be8e1e8\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6184cd96 elementor-widget elementor-widget-heading\" data-id=\"6184cd96\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technical Data <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0c5095 elementor-widget elementor-widget-image\" data-id=\"e0c5095\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1932\" height=\"1460\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec.png\" class=\"attachment-full size-full wp-image-14419\" alt=\"E27A_Spec\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec.png 1932w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-300x227.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-1024x774.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-768x580.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-1536x1161.png 1536w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-16x12.png 16w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-24x18.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-36x27.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Spec-46x35.png 46w\" sizes=\"(max-width: 1932px) 100vw, 1932px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f5d8961 elementor-widget elementor-widget-spacer\" data-id=\"7f5d8961\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f3452b4 elementor-widget elementor-widget-heading\" data-id=\"6f3452b4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Connection Diagram  (Flush mount type)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57983675 elementor-widget elementor-widget-image\" data-id=\"57983675\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2780\" height=\"1356\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type.png\" class=\"attachment-full size-full wp-image-14420\" alt=\"E27A_Connection Diagram Flush mount type\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type.png 2780w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-300x146.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-1024x499.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-768x375.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-1536x749.png 1536w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-2048x999.png 2048w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-18x9.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-24x12.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-36x18.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-72x35.png 72w\" sizes=\"(max-width: 2780px) 100vw, 2780px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-47c0ed09 elementor-widget elementor-widget-image\" data-id=\"47c0ed09\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"708\" height=\"1024\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--708x1024.png\" class=\"attachment-large size-large wp-image-14422\" alt=\"E27A_Connection Diagram Flush mount type-:\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--708x1024.png 708w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--207x300.png 207w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--768x1111.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--1062x1536.png 1062w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--8x12.png 8w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--17x24.png 17w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--25x36.png 25w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type--24x35.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-Flush-mount-type-.png 1168w\" sizes=\"(max-width: 708px) 100vw, 708px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2342341 elementor-widget elementor-widget-heading\" data-id=\"2342341\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Connection Diagram  (DIN rail type)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c007ee elementor-widget elementor-widget-image\" data-id=\"4c007ee\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"811\" height=\"1024\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-811x1024.png\" class=\"attachment-large size-large wp-image-14423\" alt=\"E27A_Connection Diagram Flush mount type\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-811x1024.png 811w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-238x300.png 238w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-768x970.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-1216x1536.png 1216w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-10x12.png 10w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-19x24.png 19w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-29x36.png 29w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png-28x35.png 28w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type.png.png 1226w\" sizes=\"(max-width: 811px) 100vw, 811px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7344df1 elementor-widget elementor-widget-image\" data-id=\"7344df1\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"703\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-1024x703.png\" class=\"attachment-large size-large wp-image-14424\" alt=\"E27A_Connection Diagram DIN rail type-1\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-1024x703.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-300x206.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-768x528.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-1536x1055.png 1536w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-18x12.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-24x16.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-36x25.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1-51x35.png 51w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Connection-Diagram-DIN-rail-type-1.png 1904w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16fe0c38 elementor-widget elementor-widget-heading\" data-id=\"16fe0c38\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Front plat flush mount and DIN rail<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-560bb83e elementor-widget elementor-widget-image\" data-id=\"560bb83e\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1978\" height=\"700\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail.png\" class=\"attachment-full size-full wp-image-14425\" alt=\"E27A_Front plat flush mount and DIN rail\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail.png 1978w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-300x106.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-1024x362.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-768x272.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-1536x544.png 1536w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-18x6.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-24x8.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-36x13.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2025\/06\/E27A_Front-plat-flush-mount-and-DIN-rail-99x35.png 99w\" sizes=\"(max-width: 1978px) 100vw, 1978px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d1b26b8 elementor-widget elementor-widget-spacer\" data-id=\"d1b26b8\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0290fbe elementor-widget elementor-widget-heading\" data-id=\"0290fbe\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Dimension<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a05ed0e elementor-widget elementor-widget-image\" data-id=\"a05ed0e\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1154\" height=\"818\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension-.png\" class=\"attachment-full size-full wp-image-16350\" alt=\"E27A Dimension-\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension-.png 1154w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--300x213.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--1024x726.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--768x544.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--18x12.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--24x17.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--36x26.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A-Dimension--49x35.png 49w\" sizes=\"(max-width: 1154px) 100vw, 1154px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15db832 elementor-widget elementor-widget-spacer\" data-id=\"15db832\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78c72294 elementor-widget elementor-widget-heading\" data-id=\"78c72294\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Product coding<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44f200e3 elementor-widget elementor-widget-image\" data-id=\"44f200e3\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1984\" height=\"844\" src=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code-.png\" class=\"attachment-full size-full wp-image-16351\" alt=\"E27A_Code-\" srcset=\"https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code-.png 1984w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--300x128.png 300w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--1024x436.png 1024w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--768x327.png 768w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--1536x653.png 1536w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--18x8.png 18w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--24x10.png 24w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--36x15.png 36w, https:\/\/www.espowercorp.com\/wp-content\/uploads\/2026\/01\/E27A_Code--82x35.png 82w\" sizes=\"(max-width: 1984px) 100vw, 1984px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-87aaa38 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"87aaa38\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9985275\" data-id=\"9985275\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fd3d97f elementor-widget elementor-widget-spacer\" data-id=\"fd3d97f\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-22da271 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"22da271\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-16c7241\" data-id=\"16c7241\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bcfc954 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"bcfc954\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/drive.google.com\/file\/d\/1Fkfjl-VtwU1hi4qGY4dxL-UIbsq7msw2\/view?usp=sharing\" target=\"_blank\" download=\"\" id=\"BTN_ESPOWER\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">\u0e14\u0e32\u0e27\u0e19\u0e4c\u0e42\u0e2b\u0e25\u0e14\u0e23\u0e32\u0e22\u0e25\u0e30\u0e40\u0e2d\u0e35\u0e22\u0e14\u0e2a\u0e34\u0e19\u0e04\u0e49\u0e32<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-c42316b\" data-id=\"c42316b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-1fa41ec\" data-id=\"1fa41ec\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ad92546 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"ad92546\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-size-xs\" role=\"button\" id=\"BTN_ESPOWER\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">\u0e14\u0e32\u0e27\u0e19\u0e4c\u0e42\u0e2b\u0e25\u0e14\u0e04\u0e39\u0e48\u0e21\u0e37\u0e2d\u0e01\u0e32\u0e23\u0e43\u0e0a\u0e49\u0e07\u0e32\u0e19<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-20b18d5 elementor-section-boxed elementor-section-height-default elementor-section-height-default qodef-elementor-content-no\" data-id=\"20b18d5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3e9acc6\" data-id=\"3e9acc6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f429465 elementor-widget elementor-widget-spacer\" data-id=\"f429465\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>SD-BD-04-02\/Rev.11\/30-04-69 DIGITAL AC VOLTAGE MONITORING RELAY Description &nbsp; &nbsp; The AC voltage monitoring relay is a digital relay and designed to monitor a three-phase supply and single-phase supply by checking all phase are pleasant and within set voltage limit. An adjustable time delay is incorporated to avoid nuisance tripping. When power is applied to relay, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-full-width.php","meta":{"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Digital AC Voltage Monitoring Relay - ESPOWER<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.espowercorp.com\/en\/digital-ac-voltage-monitoring-relay\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Digital AC Voltage Monitoring Relay - ESPOWER\" \/>\n<meta property=\"og:description\" content=\"SD-BD-04-02\/Rev.11\/30-04-69 DIGITAL AC VOLTAGE MONITORING RELAY Description &nbsp; &nbsp; The AC voltage monitoring relay is a digital relay and designed to monitor a three-phase supply and single-phase supply by checking all phase are pleasant and within set voltage limit. An adjustable time delay is incorporated to avoid nuisance tripping. 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