{"id":1552,"date":"2026-11-03T02:00:00","date_gmt":"2026-11-03T02:00:00","guid":{"rendered":"https:\/\/liqele.com\/?p=1552"},"modified":"2026-10-27T09:53:26","modified_gmt":"2026-10-27T09:53:26","slug":"vacuum-circuit-breaker-control-voltage","status":"publish","type":"post","link":"https:\/\/liqele.com\/ru\/vacuum-circuit-breaker-control-voltage\/","title":{"rendered":"\u0423\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435 VCB: \u0443\u043a\u0430\u0436\u0438\u0442\u0435 \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u043e \u043a\u0430\u0442\u0443\u0448\u043a\u0443 \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f, \u043a\u0430\u0442\u0443\u0448\u043a\u0443 \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u044f \u0438 \u0434\u0432\u0438\u0433\u0430\u0442\u0435\u043b\u044c \u0437\u0430\u0440\u044f\u0434\u043a\u0438"},"content":{"rendered":"<style>.liq-prelaunch-article{max-width:900px;margin:0 auto;line-height:1.7}.liq-prelaunch-article h2{margin-top:2.2em}.liq-prelaunch-article h3{margin-top:1.7em}.liq-prelaunch-article figure{margin:2em 0}.liq-prelaunch-article img{display:block;max-width:100%;height:auto;margin:auto}.liq-prelaunch-article figcaption{font-size:.9em;line-height:1.5;color:#555;margin-top:.7em}.liq-prelaunch-article .liq-table-scroll{max-width:100%;overflow-x:auto;margin:1.5em 0}.liq-prelaunch-article table{display:table;width:100%;border-collapse:collapse;margin:0}.liq-prelaunch-article th,.liq-prelaunch-article td{padding:.7em;border:1px solid #ddd;vertical-align:top;min-width:130px;overflow-wrap:normal;word-break:normal;hyphens:none}.liq-prelaunch-article th{background:#f4f4f4}.liq-prelaunch-article a{text-decoration:underline;overflow-wrap:anywhere}@media(max-width:600px){.liq-prelaunch-article{font-size:16px}.liq-prelaunch-article .liq-table-scroll table{min-width:660px}.liq-prelaunch-article .liq-table-scroll[data-columns=\"2\"] table{min-width:600px;table-layout:fixed}.liq-prelaunch-article .liq-table-scroll::before{content:\"Swipe to read all columns\";display:block;position:sticky;left:0;font-size:13px;color:#555;margin-bottom:8px}.liq-prelaunch-article th,.liq-prelaunch-article td{padding:.65em;min-width:180px}}<\/style>\n<style>body.single-post .hero-section[data-type=\"type-1\"]{padding-top:140px;padding-bottom:30px;background:#fff}body.single-post .hero-section[data-type=\"type-1\"] .page-title{color:#151515!important;font-size:clamp(2rem,2.7vw,2.65rem);line-height:1.2}@media(max-width:600px){body.single-post .hero-section[data-type=\"type-1\"]{padding-top:160px;padding-bottom:24px}}<\/style>\n<div class=\"liq-prelaunch-article\" data-liq-article=\"B02\" lang=\"en\">\n<h2>Quick Takeaway<\/h2>\n<ul>\n<li>Record the source, AC\/DC type, nominal voltage and available range separately for the trip coil, close coil and charging motor, even when they share a bus.<\/li>\n<li>Compare each component&#8217;s documented requirements with the voltage available at its terminals during the required duty; obtain demand and duration data rather than assuming which load draws more current.<\/li>\n<li>A charged spring, available coil power and closing permission are different conditions. Reconcile the supply schedule, fitted component data and approved schematic before confirming the order.<\/li>\n<\/ul>\n<h2>Start with three loads, not one control-voltage label<\/h2>\n<p>An entry such as &#8220;control voltage: DC 110 V&#8221; states a supply type and nominal value, while leaving the requirements of three separate electrical loads unresolved. For a spring-operated vacuum circuit breaker, those three loads are functionally distinct: the trip coil releases the opening mechanism on command, the close coil releases the stored spring energy to drive closing, and the spring-charging motor replenishes that mechanical energy after each close operation. Each load draws current at a different time, for a different duration, from a circuit that may have its own source, conductor path and protective device.<\/p>\n<p>This distinction matters immediately in procurement. The VS1-12 and VS1-24 product pages ask the purchaser to specify closing-coil, tripping-coil and spring-charging-motor operating supplies separately. The VS1-12 manual separates these as distinct rows in its rated-operating-voltage table. Treating a single control-voltage entry as a sufficient specification is not a shortcut; it leaves the supplier without enough information to confirm the fitted components and circuit, and it leaves the panel builder without a documented basis for the wiring design.<\/p>\n<p>It is worth being precise about what these three loads are not. The primary medium-voltage rating of the breaker \u2014 the voltage class of the main circuit, the vacuum interrupter and the insulation structure \u2014 is a completely separate matter. The 12 kV or 24 kV designation describes the network the breaker switches, not the low-voltage supplies that actuate it. Confusing primary voltage class with control voltage is a basic category error, but it occurs in practice when schedules compress both onto the same equipment tag. Equally, the trip and close coil supplies are not the same thing as the protection relay outputs, the remote-control signals or the supervisory communications that initiate a trip or close command. Those signals arrive at the coil circuit, but the coil supply itself must be available and within the component&#8217;s operating envelope independently of whether a command is present.<\/p>\n<p>The mechanism description above applies specifically to spring-operated VCBs. Permanent-magnet actuator configurations operate differently \u2014 the coil functions and energy storage are arranged in a way that does not map directly onto the spring-operated trip\/close\/motor separation. If the ordered breaker uses a permanent-magnet mechanism, the supply requirements follow the specific circuit for that configuration. The three-load model in this article applies to the spring-stored-energy type, which is the arrangement described in the VS1-12 and VS1-24 product and manual evidence.<\/p>\n<figure class=\"wp-block-image size-full\" data-media-role=\"featured\"><img class=\"wp-image-1547\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/featured-final-21.webp\" alt=\"A VS1-12 reference breaker beside separate Trip, Close and Charge function illustrations.\" width=\"1536\" height=\"1024\" loading=\"eager\" decoding=\"async\" fetchpriority=\"high\" srcset=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/featured-final-21.webp 1536w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/featured-final-21-300x200.webp 300w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/featured-final-21-1024x683.webp 1024w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/featured-final-21-768x512.webp 768w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><figcaption>Specify the trip coil, close coil and charging motor as separate loads. Conceptual function illustrations accompany the VS1-12 reference unit.<\/figcaption><\/figure>\n<h2>Write a complete supply identity for each function<\/h2>\n<p>Recording &#8220;DC 110 V&#8221; against each of the three loads is better than one shared entry, but it is still incomplete. A usable supply specification for each load contains the following fields:<\/p>\n<p><strong>Supply type \u2014 AC or DC.<\/strong> State the external supply type and confirm the input rating of the fitted component together with its complete driving circuit. Some arrangements use rectification or components approved for more than one input condition; others do not. The VS1-12 manual shows AC and DC selections with different circuit representations. Matching voltage numerals alone therefore establish neither suitability nor interchangeability: the selected component and circuit must accept the declared source.<\/p>\n<p><strong>Nominal voltage and the actual available operating range at the supply origin.<\/strong> The nominal rating is what appears on the bus label or the battery charger nameplate. The available range is what the supply actually delivers under normal operating conditions and under the degraded conditions that occur during a fault or network disturbance. These two figures are not the same, and the component is specified to operate across a declared envelope \u2014 not simply at the nominal value. Neither the article nor the supplier can fill this field from general knowledge; it comes from the station design.<\/p>\n<p><strong>Supply origin.<\/strong> Is each function fed from the same control bus, or do some functions draw from different sources? A common station DC battery bus can feed all three, but this must be confirmed and documented rather than assumed. Some installations supply the charging motor from station AC power while the trip and close coils use station DC. If the sources differ, the supply identity for each load must name its own origin separately, and the circuit must match.<\/p>\n<p><strong>AC frequency, where applicable.<\/strong> State the frequency of an AC source and check it against the approved input requirements of the fitted component or input stage.<\/p>\n<p><strong>Polarity and rectification details, where applicable.<\/strong> Distinguish the external supply from the electrical conditions required at the fitted component. An AC-fed input stage may rectify its source before supplying a DC-rated coil; a direct DC-fed circuit has its own polarity and protection requirements. The VS1-12 manual shows different supply-circuit representations. Record the approved input arrangement and use the order-specific schematic to confirm these details, without inferring connections from a generic diagram.<\/p>\n<p>For a project requiring DC coil supplies, a three-function enquiry record might begin as follows. The fields shown are the inputs the purchaser must determine from the station design; the confirmation column is completed by matching the ordered component and drawing against those inputs before purchase.<\/p>\n<div class=\"liq-table-scroll\" data-columns=\"8\" role=\"region\" aria-label=\"Scrollable comparison table\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th>Function<\/th>\n<th>Supply type<\/th>\n<th>Nominal voltage<\/th>\n<th>Available range at supply origin<\/th>\n<th>Source bus \/ origin<\/th>\n<th>AC frequency<\/th>\n<th>Circuit notes<\/th>\n<th>Component \/ drawing confirmation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Trip coil (TQ)<\/td>\n<td>DC<\/td>\n<td>Station DC nominal<\/td>\n<td>From station battery \/ charger design<\/td>\n<td>Station DC battery bus<\/td>\n<td>N\/A \u2014 DC<\/td>\n<td>DC direct or rectified per ordered circuit<\/td>\n<td>Confirm against nameplate and approved schematic revision<\/td>\n<\/tr>\n<tr>\n<td>Close coil (HQ)<\/td>\n<td>DC<\/td>\n<td>Station DC nominal<\/td>\n<td>From station battery \/ charger design<\/td>\n<td>Station DC battery bus<\/td>\n<td>N\/A \u2014 DC<\/td>\n<td>DC direct or rectified per ordered circuit<\/td>\n<td>Confirm against nameplate and approved schematic revision<\/td>\n<\/tr>\n<tr>\n<td>Charging motor (M)<\/td>\n<td>AC or DC \u2014 declare per site<\/td>\n<td>Station AC or DC nominal<\/td>\n<td>From supply design<\/td>\n<td>Declare source<\/td>\n<td>AC: state frequency<\/td>\n<td>Separate motor circuit; cut-off by auxiliary switch on charge complete<\/td>\n<td>Confirm against nameplate and approved schematic revision<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Leave the confirmation column blank at the RFQ stage if the supplier has not yet confirmed the fitted components. Do not fill the range field with a generic industry percentage; record the actual available conditions from the station design or leave it as a declared requirement for the supplier to confirm against.<\/p>\n<p>The VS1-24 product page makes the same requirement explicit: non-standard supplies require the matching circuit. This is not a bureaucratic formality. It means the circuit drawing tied to a specific supply combination is a different document from the drawing tied to another combination. Ordering a breaker without declaring the supply type and then receiving whatever the factory ships as default can produce a mismatch between the installed component and the available station supply.<\/p>\n<figure class=\"wp-block-image size-full\" data-media-role=\"inline\"><img class=\"wp-image-1548\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig01-final-21.webp\" alt=\"Separate blank supply records for the trip coil, close coil and charging motor, with source\/type, nominal voltage and available range fields.\" width=\"1024\" height=\"1536\" loading=\"lazy\" decoding=\"async\" srcset=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig01-final-21.webp 1024w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig01-final-21-200x300.webp 200w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig01-final-21-683x1024.webp 683w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig01-final-21-768x1152.webp 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Record the supply identity for each function separately, including the source and input type, nominal voltage and available range.<\/figcaption><\/figure>\n<h2>Check what reaches the load when it is needed<\/h2>\n<p>Once the supply identity is documented at the source, a separate question remains: what voltage is actually available at the component terminals under the conditions that require it to operate?<\/p>\n<p>This question has two parts. The first is voltage drop along the supply path while current flows. Every conductor between the battery bus and the coil or motor terminals has resistance. Every connection, fuse, isolating contact and terminal block adds a small additional drop. The size of the drop depends on the actual path and demand. Obtain the specified current and duration for each load, including relevant starting or actuation peaks. The motor charging cycle and the coil actuation pulse have different demand profiles; their relative current magnitudes must not be assumed. If that current flows through a long cable run or through a shared feeder that is also supplying other control loads, the voltage at the motor terminals during the charging period will be lower than the voltage measured at the bus under quiescent conditions. The relevant figure for component selection is the voltage at the terminals under load, not the open-circuit bus voltage.<\/p>\n<p>The second part is supply availability during abnormal conditions. A trip command is most likely to be required during a system fault \u2014 exactly the moment when station supply conditions may be abnormal. Depending on the station design, the DC battery bus may be carrying heavier than normal loads from other protection and control equipment. The battery itself may be operating at a lower state of charge. If the trip coil supply shares a feeder with equipment that draws significant current during a fault, the voltage at the trip coil terminals at the moment the protection relay issues the trip signal may be meaningfully lower than under normal conditions. The component&#8217;s approved operating envelope must cover this degraded-condition availability, not just the nominal bus value.<\/p>\n<p>These are design and procurement coordination tasks, not live testing or commissioning procedures. The appropriate response at the enquiry stage is to record the capacity and demand information from the station design \u2014 feeder size and length, expected demand from concurrent loads, battery design conditions \u2014 and confirm that the selected component&#8217;s operating envelope encompasses the available range under all required duty conditions. If that data is not yet available, it should be identified as a pending design input rather than left as an assumed match.<\/p>\n<p>Multiple close-open operations in close succession impose a different demand pattern on the motor circuit than a single operation. Declare the required operating duty and recharge opportunities as part of the specification. Confirm the mechanism&#8217;s stored-energy capability and charge recovery together with the motor-circuit demand at the available voltage; the motor supply alone does not establish the breaker&#8217;s operating sequence capability.<\/p>\n<p>None of this requires the purchaser to perform a voltage-drop calculation or specify wiring. It requires the purchaser to identify what information from the station design governs the available supply conditions, record it as part of the control-power schedule, and confirm that the component schedule is compatible. Where data is genuinely not yet available, recording the gap is more useful than filling it with a default assumption.<\/p>\n<figure class=\"wp-block-image size-full\" data-media-role=\"inline\"><img class=\"wp-image-1549\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig02-final-21.webp\" alt=\"A conceptual supply path contrasts voltage at the source with voltage at a component through a feeder and contacts.\" width=\"1024\" height=\"1536\" loading=\"lazy\" decoding=\"async\" srcset=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig02-final-21.webp 1024w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig02-final-21-200x300.webp 200w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig02-final-21-683x1024.webp 683w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig02-final-21-768x1152.webp 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Compare voltage available at the component during the required duty with its documented requirements; the supply path affects the conditions at the load.<\/figcaption><\/figure>\n<h2>Keep stored energy, release power and closing permission distinct<\/h2>\n<p>A spring-operated VCB has a charged spring, an available trip-coil supply, an available close-coil supply and a permitted operating state. Assess these as separate conditions while recognising that the selected control circuit may link them; for example, closing permission may depend on spring-charge status.<\/p>\n<p>The charged spring stores mechanical energy. Charging is done by the motor \u2014 or manually, where the design allows \u2014 and the VS1-24 mechanism description confirms that an energy-storage auxiliary switch cuts motor power when charging is complete. A fully charged spring means the mechanism is ready to release a close operation mechanically. It does not mean the close coil supply is present. It does not mean closing permission has been granted. It does not mean the trip coil supply is available for a subsequent trip.<\/p>\n<p>The close coil supply is the electrical supply to the closing electromagnet. When the close coil is energized \u2014 because a close command has arrived and been permitted \u2014 the electromagnet releases the stored spring energy and the main contacts close. If the close-coil supply is absent or outside its operating envelope, that electrical closing path cannot be relied on to perform the requested operation. Stored spring energy does not replace the required coil power; a separate manual control, where fitted, is a different actuation path.<\/p>\n<p>The trip coil supply is the electrical supply to the opening electromagnet. When the trip coil is energized \u2014 because a protection relay or manual trip command has arrived \u2014 the opening mechanism is released. An available trip command is insufficient if the required coil supply is missing or outside its approved conditions: opening through that specified electrical path cannot be relied on. Other fitted releases have their own requirements and cannot be assumed to compensate. This is why the trip-supply assessment must cover the conditions in which the protection system is expected to demand operation.<\/p>\n<p>The motor supply governs recharging, not release. In the described arrangement, automatic recharging follows closing when the selected circuit enables it and motor power remains available. Losing that power interrupts automatic charging. The ability to trip and the readiness for a later close must then be assessed separately, using the actual stored-energy state and the fitted charging and release arrangement. This condition appears at the motor supply, not at the coil labels. Diagnosing a failure to recharge by inspecting the close-coil circuit designation is looking in the wrong place.<\/p>\n<p>The permitted operating state includes interlocks, anti-pump logic and external permission signals. Anti-pump logic \u2014 present in most spring-operated VCB control circuits \u2014 governs whether a sustained close command is allowed to produce repeated close operations. Its specific implementation varies by product and circuit; the relevant point here is that anti-pump is a control-circuit function separate from the coil supply specification. Correctly specified coil and motor supplies do not bypass the anti-pump arrangement. A project that requires understanding the full interlock and anti-pump logic should consult the approved circuit drawing and the general function and integration guide at <a href=\"https:\/\/liqele.com\/what-is-a-vacuum-circuit-breaker\/\">liqele.com\/what-is-a-vacuum-circuit-breaker\/<\/a>.<\/p>\n<p>Correct voltage alone \u2014 meaning matching the nominal rating \u2014 does not establish that the breaker will operate correctly. It establishes one necessary condition. The other conditions are: the supply must be within its operating envelope at the component terminals under the required duty, the spring must be charged (for a close operation), the permitted state must allow the requested operation, and the command path used for that operation must function as designed. Keep these checks distinct, including any dependencies defined by the approved control circuit.<\/p>\n<figure class=\"wp-block-image size-full\" data-media-role=\"inline\"><img class=\"wp-image-1550\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig03-final-21.webp\" alt=\"Three functional lanes show a motor storing spring energy and separate close and trip coils releasing their corresponding latches.\" width=\"1024\" height=\"1536\" loading=\"lazy\" decoding=\"async\" srcset=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig03-final-21.webp 1024w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig03-final-21-200x300.webp 200w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig03-final-21-683x1024.webp 683w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig03-final-21-768x1152.webp 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Charging and electrical release perform different jobs in the described spring-operated mechanism. Assess energy readiness, coil power and permission separately.<\/figcaption><\/figure>\n<h2>Turn the site conditions into an RFQ and drawing review<\/h2>\n<p>The control-power schedule that accompanies a breaker enquiry should contain enough information for the supplier to confirm the fitted components and circuit, and for the purchaser to verify before purchase that the schedule, the component nameplate, the BOM and the approved schematic revision are consistent with each other.<\/p>\n<p>The practical RFQ table below expands the supply identity fields to include the demand and duty information and the document confirmation fields needed for a complete record. Use separate rows for each function. Leave confirmation fields blank until the supplier has confirmed the ordered items; do not fill them with assumptions.<\/p>\n<div class=\"liq-table-scroll\" data-columns=\"9\" role=\"region\" aria-label=\"Scrollable comparison table\" tabindex=\"0\">\n<table>\n<thead>\n<tr>\n<th>Function<\/th>\n<th>Required supply type<\/th>\n<th>Nominal voltage<\/th>\n<th>Available range at load terminals<\/th>\n<th>Source \/ bus<\/th>\n<th>Demand \/ duty evidence<\/th>\n<th>Optional releases required<\/th>\n<th>Component confirmed<\/th>\n<th>Drawing revision confirmed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Trip coil<\/td>\n<td>DC (or AC \u2014 declare)<\/td>\n<td>From station design<\/td>\n<td>From station design, degraded-condition coverage required<\/td>\n<td>Station DC battery bus or declared AC source<\/td>\n<td>Single operation; concurrent loads on feeder<\/td>\n<td>Declare if required<\/td>\n<td>Confirm on nameplate against ordered BOM<\/td>\n<td>Confirm schematic revision matches supply and options<\/td>\n<\/tr>\n<tr>\n<td>Close coil<\/td>\n<td>DC (or AC \u2014 declare)<\/td>\n<td>From station design<\/td>\n<td>From station design<\/td>\n<td>Station DC battery bus or declared AC source<\/td>\n<td>Single operation; anti-pump conditions per circuit<\/td>\n<td>Declare if required<\/td>\n<td>Confirm on nameplate against ordered BOM<\/td>\n<td>Confirm schematic revision matches supply and options<\/td>\n<\/tr>\n<tr>\n<td>Charging motor<\/td>\n<td>AC or DC \u2014 declare per site<\/td>\n<td>From station design<\/td>\n<td>From station design, under motor load current<\/td>\n<td>Declare separately if different from coil source<\/td>\n<td>Duty cycle; operations without recharge pause; charging current on feeder<\/td>\n<td>N\/A \u2014 motor readiness is mechanism state, not a release option<\/td>\n<td>Confirm on nameplate against ordered BOM<\/td>\n<td>Confirm motor circuit and auxiliary-switch arrangement in schematic revision<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Two project scenarios illustrate how the same table applies to different supply conditions.<\/p>\n<p><strong>Common DC source project.<\/strong> An indoor switchgear installation draws trip-coil, close-coil and motor supplies from a single station DC battery bus. The nominal voltage and the bus design are known. The purchaser records the DC type, the nominal voltage, and the available operating range under the battery and charger design conditions. All three rows reference the same source. The confirmation step checks that the ordered breaker \u2014 its model, arrangement and fitted components \u2014 matches the declared DC supply type and that the approved schematic revision is the DC circuit version, not an AC circuit shipped by default.<\/p>\n<p><strong>Separate AC charging source project.<\/strong> A project requires the trip and close coils to be supplied from station DC, while the charging motor is supplied from a local AC panel. Record this as the project requirement, then confirm a breaker configuration and circuit that support it. The VS1-24 circuit page notes that the charging circuit connections are distinguished from the coil connections. The motor row in the RFQ table names the AC source, the nominal AC voltage, the frequency, and the available range. The purchaser confirms with the supplier that the ordered breaker arrangement supports this split-source configuration and that the supplied schematic revision shows the correct circuit for it. Assuming that a mixed-supply arrangement is available as a standard option without supplier confirmation is not an appropriate shortcut \u2014 actual availability for a specific model, arrangement and mechanism combination is confirmed through the enquiry, not inferred from the general product page.<\/p>\n<p>The document reconciliation before purchase means checking that four things agree:<\/p>\n<ol>\n<li>The station control-power schedule as recorded by the project engineer \u2014 the actual available supplies, sources and conditions.<\/li>\n<li>The component nameplate and BOM for the ordered breaker \u2014 the declared operating supply for each fitted component.<\/li>\n<li>The approved order schematic and its revision number \u2014 the circuit that governs how the supplies are connected and what options are fitted.<\/li>\n<li>The purchase order or order confirmation \u2014 the model code, arrangement, mechanism type and supply options as ordered.<\/li>\n<\/ol>\n<p>Resolve differences in the order confirmation before production. An unresolved conflict leaves the purchaser and supplier without one agreed configuration and creates a risk of delivering components or a circuit that do not suit the installation.<\/p>\n<figure class=\"wp-block-image size-full\" data-media-role=\"inline\"><img class=\"wp-image-1551\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig04-final-21.webp\" alt=\"Site supply, fitted component and approved circuit documents connected by Match before order, with a schematic revision tab.\" width=\"1024\" height=\"1536\" loading=\"lazy\" decoding=\"async\" srcset=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig04-final-21.webp 1024w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig04-final-21-200x300.webp 200w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig04-final-21-683x1024.webp 683w, https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/fig04-final-21-768x1152.webp 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Reconcile the site supply record, fitted component data and approved schematic revision before confirming the order.<\/figcaption><\/figure>\n<h2>Send the control schedule with the breaker enquiry<\/h2>\n<p>The enquiry that produces a quotable, internally consistent control-power record contains the following inputs:<\/p>\n<ul>\n<li><strong>Site supply information for each function:<\/strong> type (AC or DC), nominal voltage, actual available operating range at the supply terminals, source bus or panel, AC frequency where applicable, and any known constraints on the feeder (length, shared loads, concurrent demand).<\/li>\n<li><strong>Full model and arrangement:<\/strong> the complete breaker model designation, mechanism type (spring-operated or other), mounting arrangement (fixed, withdrawable\/handcart) and any arrangement-specific features that affect the control circuit.<\/li>\n<li><strong>Three explicit supply lines:<\/strong> trip coil, close coil and charging motor as separate declared items, not a single control-voltage entry.<\/li>\n<li><strong>Required operations and duty:<\/strong> whether a specific duty cycle or a defined number of operations without recharge is needed for the application.<\/li>\n<li><strong>Optional releases and control features:<\/strong> anti-pump, electrical\/mechanical interlocking, remote operation, shunt trip, under-voltage release or other control options the project requires. These are separate order fields, not implied by the supply voltage.<\/li>\n<li><strong>Control schematic and revision:<\/strong> the approved circuit drawing for the ordered arrangement. If this is a replacement or retrofit, the revision must match the actual fitted components of the ordered breaker, not the previous installation.<\/li>\n<li><strong>Existing nameplates for replacement projects:<\/strong> if the breaker replaces an existing unit, record the nameplate data of the current installation. A change in the available supply between the original installation and the replacement project must be identified and resolved in the new order, not carried over silently.<\/li>\n<\/ul>\n<p>For the VS1-12 and VS1-24 indoor vacuum circuit breakers, the current product pages and ordering sections provide the correct supply and option fields:<\/p>\n<ul>\n<li><a href=\"https:\/\/liqele.com\/products\/vs1-12\/\">VS1-12 product page and order enquiry<\/a><\/li>\n<li><a href=\"https:\/\/liqele.com\/products\/vs1-24\/\">VS1-24 product page and order enquiry<\/a><\/li>\n<\/ul>\n<p>For a broader introduction to function, rating, installation type and control selection across the indoor and outdoor range, the general selection guide covers the wider decisions before reaching the control-power schedule stage:<\/p>\n<ul>\n<li><a href=\"https:\/\/liqele.com\/select-medium-voltage-switching-devices\/\">Select medium-voltage switching devices \u2014 function, rating and control guide<\/a><\/li>\n<\/ul>\n<p>To send a complete control-power schedule and the approved schematic revision with your enquiry:<\/p>\n<ul>\n<li><a href=\"https:\/\/liqele.com\/contact\/\">Contact Liqiang<\/a><\/li>\n<\/ul>\n<hr \/>\n<h2>Frequently Asked Questions<\/h2>\n<h3>Why does the charging motor need a separate supply specification even when it shares the same bus as the coils?<\/h3>\n<p>Sharing a bus does not make the fitted loads or circuits identical. Record the motor&#8217;s charging demand, starting conditions and duty separately from the coils&#8217; actuation demand and duration; do not assume which current is larger. Check the source and feeder for the overlap and operating conditions allowed by the actual control design, rather than assuming all three loads always operate simultaneously. The charging circuit also includes its own charge-complete cut-off arrangement in the described mechanism, so its component rating and approved schematic must be confirmed separately.<\/p>\n<h3>What should the purchaser do if the available operating range at the load terminals is not yet determined at the time of enquiry?<\/h3>\n<p>Record the supply type and nominal voltage as known, identify the range determination as a pending design input, and state the duty and source design assumptions clearly in the enquiry. A supplier can confirm the component&#8217;s required operating envelope against the nominal supply and flag whether the application conditions you have described are within scope; they cannot confirm coverage of an unspecified range. If the station battery design, feeder sizing or concurrent load profile is not finalised, the control-power schedule should say so explicitly rather than entering a default percentage tolerance that may not reflect the actual installed conditions. For replacement projects, the existing installation&#8217;s nameplate and the station supply record from the original commissioning documentation provide a starting point, but any changes to the supply since the original installation must be identified before the replacement order is placed.<\/p>\n<h3>Can a project use AC supply for all three functions \u2014 trip coil, close coil and charging motor?<\/h3>\n<p>Whether a specific model, arrangement and mechanism combination supports AC supply for the trip and close coils depends on the ordered circuit. The VS1-12 manual shows AC 110\/220 and DC 110\/220 as supply options, and the product pages confirm that non-standard or mixed supplies require the matching circuit. This means AC coil supply is a selectable option for some configurations, accompanied by a different circuit drawing that may include rectification stages. It is not a universal default, and the availability of a specific AC coil option for a particular arrangement must be confirmed through the enquiry rather than assumed from the general option list. When specifying AC supply for the coils, the frequency must be declared, and the approved schematic revision must be the one corresponding to the AC circuit. Where the project requires AC for one or more functions, record each source separately and confirm its matching component and circuit option. A motor entry does not settle the coil entries.<\/p>\n<p><!-- LIQELE:FAQ-END --><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u0442\u043e\u043b\u044c\u043a\u043e \u043e\u0434\u043d\u043e\u0439 \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442, \u0447\u0442\u043e \u0442\u0440\u0438 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 \u043e\u0441\u0442\u0430\u044e\u0442\u0441\u044f \u043d\u0435 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u043c\u0438. \u041f\u0435\u0440\u0435\u0434 \u0440\u0430\u0437\u043c\u0435\u0449\u0435\u043d\u0438\u0435\u043c \u0437\u0430\u043a\u0430\u0437\u0430 \u0437\u0430\u0444\u0438\u043a\u0441\u0438\u0440\u0443\u0439\u0442\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u043f\u043e \u043a\u0430\u0436\u0434\u043e\u043c\u0443 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0443 \u043f\u0438\u0442\u0430\u043d\u0438\u044f, \u0443\u0441\u043b\u043e\u0432\u0438\u044f \u043d\u0430 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0435, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0443\u044e \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e \u043f\u043e \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430\u043c \u0438 \u0441\u0445\u0435\u043c\u0430\u043c.<\/p>","protected":false},"author":1,"featured_media":1547,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-1552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"_links":{"self":[{"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/posts\/1552","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/comments?post=1552"}],"version-history":[{"count":1,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/posts\/1552\/revisions"}],"predecessor-version":[{"id":1553,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/posts\/1552\/revisions\/1553"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/media\/1547"}],"wp:attachment":[{"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/media?parent=1552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/categories?post=1552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/liqele.com\/ru\/wp-json\/wp\/v2\/tags?post=1552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}