Uninterruptible Power Supply Evacuation Lifts and Smoke Ventilation

Uninterruptible Power Supply Evacuation Lifts and Smoke Ventilation

Uninterruptible Power Supply Evacuation Lifts and Smoke Ventilation

22/06/2020

Evacuation Lifts UPS System

British Standard BS999:2008 provides best practice for fire safety and fire strategy. Legislation now requires that lifts which are to be used for evacuation in the event of a fire must have a secondary supply. Trying to secure a secondary supply into an existing building can be difficult or impossible, so a sensible option to comply would be to install an Uninterruptible Power Supply (UPS) locally.

There can be regenerative load caused by lifts which has to be taken into account at the design stage, otherwise the UPS has to be oversized or will become damaged. UPS Power Services use a patented GLM technology on UPS specified for use with lifts which intelligently deals with this.

Lift motors can also have high inrush currents which require the UPS to be sized correctly, if you wish to discuss any requirements or require assistance at the design stage then please get in touch.

Smoke Ventilation UPS Systems

In the event of a fire within buildings, specialist ventilation systems aid firefighting efforts and escape by quickly clearing smoke. These smoke extraction and ventilation systems must have a secondary independent power supply. Where the supply cannot be provided or sourced from the grid then a suitably sized UPS can be installed to meet the requirements of BS9999:2008.

UPS Power Services have installed systems with battery backup times  of up to 3 hours in case of a power supply failure.

Case Study

GS Yuasa’s industry-leading industrial batteries have been installed as part of a smoke and fume ventilation system in the experimental town of Poundbury.

The batteries, installed in an underground car park, provide back-up power to a ventilation system. In the case of a fire occurring in the car park, or any of the vehicles parked within it, the ventilation system is designed to reduce both smoke density and temperature. It also increases ventilation allowing for the accelerated clearance of smoke once the fire has been extinguished.

Commissioned, delivered and installed by UPS Power Services, the system uses 120 Yuasa SWL3300FR batteries to provide up to three hours back-up power. The SWL series is made in Britain, maintenance free and has a 10 to 12-year Eurobat classification. Designed for use in UPS and other high-rate discharge applications, the SWL series is available in both 6 and 12 Volt types and ranges from 24 to 120 Ampere hours (Ah).

“We chose Yuasa’s SWL series due to its technical superiority and unparalleled reliability. Their aftersales support is fantastic too, as is the ability to add a five-year warranty to the product, making them the perfect choice for the Poundbury project” added Mark.

One of the unique demands for this type of system is the need to meet the requirements of the BS9999 Code of Practice for Fire Safety in the Design, Management and use of Buildings. This includes the need to have two independent power supplies.

Mark Trolley, Commercial Director at UPS Power Services Ltd, said: “As this wasn’t possible in this location, this part of the standard is met by using an Uninterruptable Power Supply (UPS) for the secondary supply in case of a mains failure. This is not intended to assist in means of escape in case of a fire but to assist fire-fighting operations by providing smoke clearance.”

Lee Allen, Regional Sales Manager for GS Yuasa Battery Sales UK Ltd said: “Yuasa batteries are used in a wide variety of innovative applications across the world – their reputation for quality makes them the obvious choice for UPS systems where dependability is key. We were delighted to be chosen by UPS Power Services as the preferred battery supplier for their Poundbury project.”

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AEC 110V / 120V CE Low Volt AC Online Double Conversion UPS In Stock

110V and 120V Uninterruptible Power Supply with CE approval for use in the UK

AEC 110V / 120V CE Low Volt AC Online Double Conversion UPS

UPS Power Services Ltd provide a range of 110V and 120V Uninterruptible Power Supply with CE approval for use in the UK.

Typical Applications

Typical applications for these products include specialised instrumentation, process control, off shore, UK manufacturing and utility companies.

The range features standard IEC outlets for easy connection with American NEMA, Schuko or BS input leads.

Remote monitoring connectivity is available as standard via USB or RS232 with optional network and relay contact cards for connection to BMS systems. Integrated monitoring software is also included.

The entry online double conversion 1kVA 110V / 120V UPS are now in stock with further sizes available upon request with fast delivery.
If you have a requirement for Low Voltage UPS contact us now for further information.

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If you have a requirement for Low Voltage UPS contact us now for further information.

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Modular UPS systems versus standalone

Modular UPS systems versus standalone

Modular versus standalone UPS

A blog about the benefits and pitfalls of modular ups systems against standalone ups systems.

Modular UPS Systems Versus Standalone UPS Systems

Snowballing power requirements, improved component technology along with increasing user demand over the past five years have now driven modular UPS systems to be designed, specified, and supplied by all the leading UPS manufacturers.

Mark Trolley, Commercial Director of UPS Power Services Ltd talks about the reasons for the move away from traditional UPS technologies and highlights some points of interest when comparing modular and standalone UPS technologies.

“Anti” modular UPS arguments no longer make sense…

Where once modular UPS was frowned upon for being “unreliable” either because of an increased component count over standalone units, a single point of failure on the output static switch or redundant power modules only having a single controller, modular UPS are now a seen as the elite of UPS technology and the future of the industry.

Complex switching algorithms controlling the accuracy of load sharing between tens of power modules all connected together, show efficiency increases and also prevent circulating electrical current prematurely ageing components. Centralised or decentralised static switch technology now overrides the single point of failure argument. Static switch modules can now be removed and replaced “live” while load continues to be powered by the UPS inverter and the DSP controllers located on each module with redundant frame controllers allow power modules to be hot swapped or even removed without interruption to the load.

Maintenance and service

During the service and maintenance period of a UPS, the connected loads are normally transferred to bypass (raw mains power) for safe working requirements. During this time the connected equipment is without any power protection and vulnerable to any mains electricity variations.

 

Is my UPS really standalone?

Many “standalone” UPS systems, also referred to as “monolithic” or “solid state” by vendors are actually made up of internal components set out in a modular layout. Some manufacturers contain a number of physical modules with a single display and control screen with one covering front door, others have the internal components set out in a number of smaller power ratings which are then connected in parallel. One of the reasons for this is now the sheer scale volume in production of smaller switching semiconductor components compared to the lower number of larger semiconductor components. The vast scale of production means using three or four times the number of components is still more cost effective than using larger semiconductor devices. The components can also be set out more efficiently for heat dissipation saving physical space and increasing power density of the unit. It also reduces production time for the UPS manufacturer as only a limited number of power ratings need to be sourced and stocked. Therefore, You may find that your standalone UPS is actually of internal modular design and construction anyway.

Low Loading Efficiency

When a UPS is first specified, it is nigh on impossible for a user to know the total loading throughout the UPS service life, especially where the UPS supports a growing infrastructure company such as a colocation datacentre. Even when the load is accurately calculated and achieved, a “safety” factor is added to the load in order to to size the UPS in event of of any overload conditions, future server upgrades or unbalanced deployment of load across the output phases.

Like any electrical device a UPS would usually be most efficient operating at 100%, but this is neither practical nor possible in reality. While standalone UPS have been optimised to provide high efficiencies at mid loadings, the user will have to choose between future power availability or maximum efficiency, based on the capacity installed on day one.

Advanced modular UPS allow a certain number of modules to be hibernated or switched off if the load decreases or is initially lower than expected, not only does this add extra redundancy but it also allows the other power modules to run at a more efficient loading. To ensure all modules “age” at the same rate, modules can even be cycled to utilise all components for the same period of time. If the loading is not as expected or decreases, the user can physically remove modules as required.

Growth

Power modules are usually mounted into a UPS frame, which may contain a manual bypass switch, main controllers and static switch depending on the manufacturer. While the frame size along with the supply switchgear and cabling determines the total growth in power, a user can start with a lower number of power modules and add further modules, as and when load requirements increase. Thought should be given to the correct mains supply protection for day one capacity and future additional battery requirements, but if these are considered, modular UPS can be deployed as they are marketed on a “pay as you grow” or “scale up as required” basis. Users should ensure that the same modules will still be available from the manufacturer when required.

Cost

The cost effectiveness of modular UPS against standalone units completely depends on the power infrastructure requirements. For example if a user simply requires a 200kVA UPS, then a standalone unit will be more cost effective than a modular UPS frame with four x 50kVA power modules. If however the user requires an element of redundancy, then five x 50kVA power modules in one frame will usually be more cost effective than two x 200kVA standalone UPS. The physical space requirement, electrical supply and battery configuration will also be massively reduced.

Conclusion

Modular UPS systems are now dominating the mainstream marketing of the large UPS manufacturers and analysts predict the future market growth rate of modular UPS to overtake traditional standalone systems. To determine which technology will be the most resilient, efficient and cost effective for use, the user and sites requirements should be carefully considered. If the resilience and efficiency required are within acceptable limits from both technologies, it may be a choice of upfront purchasing costs (CAPEX) where standalone may be better vs the operating costs (OPEX) over the lifetime of the UPS. The future servicing and electricity costs along with manufacturer support and availability should also be considered.

There are advantages and drawbacks for both technologies and each site requirement will differ, so discussing your particular power protection requirements with an experienced, helpful and honest UPS specialist such as UPS Power Services will assist in determining which is the correct choice for you.

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