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Charger : in numerous UPS systems due to the nature of the design a different battery charger is applied, this is more common on sub 60kVA UPS systems and is quite common on small sub 3kVA items.
Battery : this is actually the energy storage section and is kept charged eith...
Rectifier : this part of the UPS charging current for the battery and also the supply requirements for the inverter and can converts the incoming alternating current (ac) supply to direct current (dc).
Charger : in numerous UPS systems because of the character of the design a different battery charger is applied, this is more common on sub 60kVA UPS systems and is very common on small sub 3kVA devices.
Battery : here is the power storage section and is kept charged either by the rectifier or perhaps a separate charger. As AH (ampere hour), which will be how many amperes of current that the battery can provide for an hour, their storage capacity is generally exhibited. There will be an amount of limiting factors depending upon the application, typically if the design calls for a small autonomy (period of time the battery will support its load for), the batteries may be released to a level, in the case of emergency lighting where there's a requirement for a autonomy the battery won't be permitted to discharge so much. These circumstances help to allow the optimum design life of the battery to be performed.
Inverter : an ac output is provided by this section of the Uninterruptible power supply to the load which can be in phase with the input mains supply. Because of the number of conversions (ac to dc to ac) and the filtering involved it may be termed as a 'clean source.'
Fixed Switch : this signal can be as easy as a relay or maybe more commonly using thyristors, its function would be to move the load between the inverter and the power mains supply. As has been earlier mentioned the result of the inverter is in phase with the electricity mains source so that any switching between your two will be nearly seamless. This design means that if the inverter experiences an overload condition, because extremely fast over-current discovery tracks it will transfer the load to the more tough mains supply. An average example would be when a host tray is switched on, the inrush current, based upon the size of one's uninterruptible power supplies, could cause the transfer to the power mains supply, and once switched on the load can transfer back to the inverter offering the inverter has sufficient capacity to support the load. Also a problem on the inverter will cause the load to be moved, again nearly seamlessly; it would be unusual for any loss in load to occur over these conditions.
Maintenance Bypass : more generally found in UPS systems with a volume of 6kVA or greater. This arrangement allows force to be transferred under controlled conditions to the UPS and the power mains to be shut down without damage. Generally performed for routine UPS maintenance or UPS restore.
External Maintenance Bypass : the installation of an maintenance bypass can allow the UPS to be removed/replaced without disturbance to the load, also, if the true maintenance bypass is fed from another source it can allow load testing in the case of a major UPS fix and/or checking of the independence under simulated load conditions while the site load will be supported by the external maintenance bypass circuit. When letting the UPS System to be bypassed onto standby diesel generator power this is often used. Alternately, when batteries are removed and replaced, it could only be done by placing the uniterruptible power into outside bypass.
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