An Uninterruptible Power Supply (UPS) is defined as a piece of electrical equipment which can be used as an immediate power source to the connected load when there is a failure in the main input power source. In a UPS, the energy is generally stored in flywheels, batteries, or super capacitors. When compared to other immediate power
With static transfer switches, an operator is able to force a switch between the two power sources if there is a requirement to do so. This is normally achieved from the mimic display panel or via a remote connection. Importantly, both switches ensure that there is a transfer in less than four milliseconds, or one-quarter of an electrical cycle.
Here are key points about the Static Switch in a process industry UPS system: Automatic Switchover. The primary function of a Static Switch is to automatically and rapidly switch the load from the primary AC power source to the UPS inverter''s output when it detects anomalies or disruptions in the primary power.
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
The static transfer switch (STS) has recently emerged as the most important technology for electric power transmission, distribution, and control systems to manage power supply during power system
The static transfer switch is able to accomplish this through the use of silicon-controlled transfer rectifiers. These are non-mechanical, semi-conductor components that are able to detect power issues and complete the switch. There are both low voltage and medium voltage static transfer switches used on both small and large types of
The UPS rectifier carries out several key functions. The first is to convert the input power from AC (Alternating Current) to DC (Direct Current). Its second main role is to recharge the batteries, while the DC power routes to the inverter too. In the event of a UPS fault, the static bypass switch automatically connects the load to the
Automated function with priority selection. In the automated function the supply of the priority input is connected to the load. If the static switch detects deviation from UPS System with Static Switch = AC mains Static Switch Bypass Switch AC output (Load) Inverter Battery Model Output Power [kVA] Input / Output [V] SS 1506 0.8 115 SS
The static transfer switch (STS) has recently emerged as the most important technology for electric power transmission, distribution, and control systems to manage power supply during power system
The static switch in parallel modular UPS systems. The static switch''s role is a little more complex in multi-module parallel UPS systems, because it depends on whether the UPS has centralised parallel
No UPS. Requires off-line maintenance. Tier 1 Basic UPS system with one path for power delivery and no redundancy. Requires off-line maintenance for many components. STS2 static transfer switch has mitigated this issue through its patented Optimized Transfer option, which minimizes voltage disturbances during load switching of magnetics
Under normal conditions, UPS #2 is idle but always on and ready to assume the critical load through the transfer of static switch (UPS #1). If UPS #2 should fail, its static switch will sense the loss of function and transfer the load to the system bypass source.
The basic function of an Uninterrupted Power Supply (UPS) is to protect and deliver power to critical electrical equipment and to keep the equipment running in the event of a power outage or surge until the grid is restored or back-up power generators are ready to power the load. Bypass Operation Mode uses a static switch to supply the
A UPS Inverter, connected to a battery bank, draws direct current (DC) and converts it to consistent alternating current (AC). If the UPS inverter fails, the static bypass switch detects the voltage drop and quickly switches to the grid''s AC power, ensuring uninterrupted power to the connected loads. This allows the UPS inverter to be
What is a Bypass Switch? 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 benefit to allow service and isolation for safety purposes. Correctly designed systems should enable these operations to be performed without loss of power to the load.
The function of a static switch in the UPS is to provide an automatic transfer from the output of the inverter to an alternate or backup source in the event of an overload or fault on the UPS output. An overcurrent transfer circuit is included in the static switch for this purpose. Regards. Hassan Qutb.
Here are key points about the Static Switch in a process industry UPS system: Automatic Switchover. The primary function of a Static Switch is to
A static UPS system usually consists of a battery to provide continuous source of electrical power; a rectifier/charger to maintain battery charge and to provide input to inverter when
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. The UPS system also controls the phase and frequency of
Bypass Operation Mode uses a static switch to supply the load from the bypass source. In the invent of a short-circuit failure on the UPS load at a current level
The function of a static switch in the UPS is to provide an automatic transfer from the This system is composed of two UPS units with a static switch between them. Unit "A" is the prime unit, which is normally supplying power to the load. Unit "B" is on, but it is idle. Should Unit "A" fail, the static switch will transfer the load to Unit
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 effect,
A static bypass switch is an automatic transfer switch (ATS) that works with UPS systems to enable them to regulate incoming voltage levels when there is an interruption or fluctuation in the main supply. It acts as an intermediary between incoming utility power and a UPS system, allowing users to change between either source without
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 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 rectifier which generates
A Static Power transfer Switch consists of three basic parts: A Breaker or a bus assembly. Control System and metering system. Silicon Controlled rectifiers – of which the internal structure is made up of. The block diagram of a static switch is shown below: Depending upon voltages, static transfer switches can be classified into two categories:
The main function of the rectifier is to convert AC power into DC power. It achieves this with the use of diodes, which only allow the flow of electricity in one direction. When an overload or fault occurs within a UPS, the static bypass switch automatically connects load to the main power supply. The static bypass is a safeguard against
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 power, depending
The bypass static switch can switch to non-conducting mode in less than 8 milliseconds. When the UPS recognizes the loss of normal input power, it transfers to battery/inverter mode by simultaneously
The UPS rectifier carries out several key functions. The first is to convert the input power from AC (Alternating Current) to DC (Direct Current). Its second main role is to recharge the batteries, while the DC power routes to the inverter too. In the event of a UPS fault, the static bypass switch automatically connects the load to the
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
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
In this article, Alex Emms, Operations Director at KOHLER Uninterruptible Power Ltd., a KOHLER company, looks at the role of static switches within different UPS architectures, and how they contribute to