In uninterruptible power supply (UPS), it is an electronic switch used to bypass a mechanical switch. Normally used when loads are switched from inverter to mains.Static switch is an automatic switch that can only be activated depending on the condition of the UPS.The following are the conditions wherein the UPS static switch can
An external maintenance bypass switch enables a UPS system to be electrically isolated – taken out of the critical power circuit – for safe UPS maintenance or unit replacement. It enables service work to be undertaken without disrupting the critical load. Without an external bypass switch, such as Riello UPS''s Multi Pass, to allow for
Fig 1. Simplified static switch. The static switch is an intelligent device that decides whether to use the UPS inverter output or the raw mains to supply the load. The decision is made by logic within the switch and/or the UPS''s control system, which continuously monitors the bypass (raw mains) and inverter voltages.
5.1.4 The UPS system shall be of modular design and made up of one or more physically detachable equipment modules or cabinets, preferably of the draw-out type and removable from the front of the UPS system. 5.1.5 The UPS system shall be designed to permit ready access to modules and assemblies.
A static bypass switch automatically and instantaneously transfers the load to the mains electricity supply when there''s an internal fault or failure with the UPS
This type of UPS is generally equipped with a static bypass, sometimes referred to as a static switch. The load can be transferred without interruption to the bypass AC input (supplied with utility or standby
In some installations, the bypass supply could be provided by an on-site generator. The static switch has two operational states – ''On UPS'' and ''On Bypass''. The static switch typically comprises a pair of
There are two main types of bypass switches that have purposeful functions. These are the static bypass switch and the external maintenance bypass switch. The static bypass is used as a failsafe for the inverter; if the inverter should fail the load will drop automatically onto the mains input feed which ensures continuous power. This switch is
Static Switch unit ค อ อ ปกรณ ท ใช เอาไว Switching ของ Power source น นไปย ง Load ผ าน UPS หร อว า Bypass unit Bypass unit ค อ Power source จะดำเน นการจ ายไฟฟ าไปย งภาระทางไฟฟ า (Load) ได
Two Main Types of Bypass Switches. There are two main types of bypass switches that have purposeful functions. These are the static bypass switch and the external maintenance bypass switch. The static bypass is used as a failsafe for the inverter; if the inverter should fail the load will drop automatically onto the mains input feed which
1803. Hi Dennis, If your system is covered by a service contract then the fans in the static switch module can be replaced by a qualified Field Service Engineer (FSE). If the UPS is not covered, then you could have the module repaired by a FSE under a time and materials visit (if available in your region). I hope this answers your question.
Accordingly, practical UPS installations include a static switch which can select between the UPS inverter output and a raw mains bypass to feed the critical load. In online UPS systems, the switch remains ''on UPS'' unless a UPS fault develops, in which case it changes over automatically and seamlessly to the raw mains supply.
Static Bypass Switch . This component is a safeguard in case there''s a failure within the UPS system. In the event of a UPS fault, the static bypass switch automatically connects the load to the mains supply, bypassing the rectifier, batteries, and inverter.
In Hot standby configuration, the normal system power flow to the critical load is through UPS #1 and UPS#2 acts as standby UPS. If UPS #1 should fail, or if the load current exceeds the UPS''s full load rating, the static switch will transfer the critical load to the static bypass (which is the output of UPS #2) within 4-5 milliseconds.
In some installations, the bypass supply could be provided by an on-site generator. The static switch has two operational states – ''On UPS'' and ''On Bypass''. UPS operational modes. The static switch''s role relates to the three operational modes for UPS systems; ''on-line'', ''off-line'' and ''line-interactive''.
The static switch''s role relates to the three operational modes for UPS systems; ''on-line'', ''off-line'' and ''line-interactive''. Products such as KOHLER Uninterruptible Power''s PW 9000DPA can operate in any of these modes. On line operation offers the best protection to the load. The mains supply, when present, is used to feed the
A static bypass switch automatically and instantaneously transfers the load to the mains electricity supply when there''s an internal fault or failure with the UPS system. It is a common characteristic of an Online UPS. In
STS (Static Transfer Switch), is an automatic static switching equipment designed to transfer critical loads between two independent AC power sources without interruption or with a transfer time of less than a cycle (20ms). The STS consists of Silicon controlled rectifiers (SCR''s), control & sensing circuits to monitor the incoming sources
In a distributed bypass architecture, each UPS module has its own internal static switch (Fig. 1), rated according to UPS size, and each UPS monitors its own output. If the UPS system needs to transfer to bypass, each static switch in each module turns on at
For maintenance, a transfer from static to maintenance bypass would be needed. Question: Are static switches external to the UPS assembly? And are static switches make-before-break type of switches? Answer: Static bypass switches are internal for most modern manufacturers. They are half of a static transfer switch. They
Static Bypass switches are used to bypass the UPS normal operation, in cases of high inrush or fault conditions. Manual bypass switches are an added Reliable power for a sustainable world Call: +91-783 855 2211 Email: marketing@riello-power
Forty years ago, Cyberex revolutionized power distribution with its invention of the static transfer switch. Since then, Cyberex has installed more units than any other manufacturer. It is from this experience and our customers'' requirements that the SuperSwitch ® 4 has evolved. Designed foremost with fault-tolerant architecture, SuperSwitch
The static bypass is a fast-acting semiconductor switch that enables a UPS to transfer back to utility power in milliseconds in the event of an overload or internal fault. The result is extremely high availability even when things may go wrong, such as
Unlike External maintenance bypass switch, static bypass switch in online UPS is a non-contact switch, is to use two SCR (SCR) reverse parallel composition of a
Concerns – Static Bypass Operation Due to Automatic Change-Over: Status – Static Bypass Operation Due to Automatic Change-Over: 1: Main input power to rectifier: Outside the tolerance range (it may be within the tolerance range). If the inverter is overloaded and its power limit is reached, the UPS will also switch to bypass.
Internal Manual Bypass Switch: The manually operated make-before-break bypass switch is located within the main UPS cabinet. Typically the switch is a two position rotary
Fig.1 shows how the static switch connects the critical load to either conditioned power from the UPS or raw mains from the bypass supply. In some installations, the bypass supply could be
How does a UPS Bypass Switch work? UPS Static Bypass switches allow the normal UPS normal operation to be circumvented, in cases of an overload or fault situation. A properly designed system should enable
In the event of a UPS fault, the static bypass switch automatically connects the load to the mains supply, bypassing the rectifier, batteries, and inverter. Having to transfer to mains supply isn''t ideal as the power won''t be filtered or conditioned as is usually the case with an online double-conversion UPS, but it does enable equipment to continue functioning
Internal Maintenance Bypass switches, or Static Bypass switches in online UPS systems, only allow for safe maintenance work in electrically isolated parts of a UPS system. In this instance, some of the UPS areas may still be live, including busbar connections. Often, Static Bypass switches are used to bypass normal UPS operation
In Riello UPS TV, Tech Talk. December 12, 2017. This ''Tech Talk'' video explores the reasons why a UPS might switch to static bypass and explains the importance of bypass synchronisation to ensure no break power transfer. A static bypass is a crucial element of all dual conversion online uninterruptible power supply (UPS)
UPS maintenance bypass installation best practices. When deploying a fully redundant system isn''t in the budget, Eaton recommends installing a maintenance bypass. Adding a maintenance bypass to a backup power system provides additional redundancy to keep your system online through outages, UPS maintenance or replacement.
An external maintenance bypass switch is used to isolate the Uninterruptible Power Supply during routine maintenance such as unit replacement without any disruption to the load. Because it is a manual switching method to transfer the load between UPS output and the mains power supply, the switch is also known as a manual bypass switch.
This bypass option, whether through choice or necessity, calls for a static switch that handles the changeover between the UPS and bypass – and back again – reliably and seamlessly. Below, we look at