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provide early warning of developing earth faults, removing the possibility of unnecessary power interruption and unplanned shutdown. Tier 3 and 4 data centres are designed with redundant power from source to socket, to cater for any eventuality resulting from a single failure. But power outages in data centres can still occur. Redundant designs are deemed to be concurrently maintainable but switching off systems even for periodic inspection and testing carries with it the restart risk. Bender residual current monitors


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(RCM) are used to monitor earthed systems (TT and TN systems) for fault currents or residual currents. They continually monitor insulation levels, providing early warning of earth faults and notifying the end user before the shutdown threshold is reached. Continuous monitoring also enables data centres to fulfil the requirements for regulatory checks without shutting down the power. This enables the data centres to provide continuous, reliable service to customers and removes the risks that accompany even the most meticulously planned restart. Downtime in colocation data centres is especially difficult, as a large number of customers’ data is located in one data hall. Bender UK’s residual current monitoring solution reduces the headache involved with having to agree and organise a single maintenance shutdown period that pleases all your customers.


Meet the requirements for periodic inspection and testing (PIT) without shutdown Power shutdown during periodic inspection and testing is intrusive and provides only a snapshot of the status of a power system. All other tests during periodic inspection and testing can be carried out either with power on or with minimum disruption at circuit level. Bender UK continuous residual current monitoring enables the data


centre operator to meet these regulatory requirements without power shutdown.


BS7671:2018 651.2 states: “…Where a circuit is permanently monitored by a residual current monitor (RCM) or insulation monitoring device (IMD) it is not necessary to measure the insulation resistance if the functioning of the RCM or IMD is correct…"


Why monitor residual current in a data centre environment? Due to the nature of the loads installed in data centres, use of residual current devices (RCDs) is not recommended because of their nuisance tripping problems. By using Bender technology to monitor the RCD, any deteriorations are detected very early on before the shutdown threshold – ensuring reliability and allowing for smooth running of your data hall. It is particularly important to examine the detail of power system


performance; to detect and evaluate fault currents, equalising currents and insulation faults in a finely granulated way. Insulation faults, stray


ontinuous power monitoring systems from Bender UK are designed to monitor and


WHAT’S NEW SPONSORED BY


Bender UK Data Centre Technology Eliminate data centre power shutdowns and ensure maximum availability


Take control of emissions on site: Casella Guardian2 with VOC monitoring


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and pollution can be a major problem in the UK. Heavy industrial production was


once a driving force for our nation’s economy and now many sites pose a major hazard for new construction operations . The remediation of


contaminated land sites can prove to be a challenging undertaking, however, effective boundary monitoring solutions can help to mitigate any environmental issues during construction by effective measurement of toxic compound exposure.


Casella demonstrates its


commitment to reducing environmental risks with the new Guardian2 site boundary monitor, designed to help site management remain compliant with emission levels, using remote monitoring and reporting of noise, dust and vibration levels, and now includes monitoring of Volatile Organic Compounds (VOCs). The innovative Guardian2 is equipped with a photoionization detector (PID) and measures for


currents, overloaded N conductors due to harmonics or asymmetrical loads, interruptions of PE and N conductor and also EMC influences can interfere with the entire current supply system and have an impact on the operation. The impact can range from triggering several protective devices, and


unexplainable malfunctions of protection or IT systems to fire damage or even injury to personnel. The advantages of Bender RCM technology have been proven through its use in large data centres in Europe, delivering safer and more reliable systems and greater availability by providing advanced warning on developing insulation faults. Another benefit is the ability to pinpoint the location of an earth fault. Continuous residual current monitoring using Bender RCM technology enables effective monitoring of power infrastructure, as well as cabling it also monitors the status of connected equipment including servers. Bender technology also enables the operators and users to tailor the


system to meet their individual requirements – supplying a bespoke solution. The RCM threshold response value and the time delay can be adjusted to precisely match the requirements of each individual location, which means that known sources of errors and transient faults can be masked. If a residual current exceeds a defined threshold value, the RCM system sends a warning to the building control system, identifying problems and issues before they become critical. Residual current monitoring instantly alerts the control centre if a


problem begins to develop, equipping the operators to take action before the problem becomes critical. Data from the RCM system can feed into a normal PC or laptop on


site, or to your data centre infrastructure management software. Data can also be monitored remotely using the internet to securely log in and check the status and performance of one or multiple sites. To find out more about how Bender UK can safeguard data centre


availability and identify issues before they become critical visit stand D953 at Data Centre World or go to:


www.bender­uk.com/solutions/data­centres


Corridor function for Inceptor EVO LED Bulkheads


the same great features of the original, but with the addition of corridor function which will help reduce energy consumption. Scolmore has a patent on the product’s unique design. The corridor function feature provides a dimmed level of light for periods of vacancy. It is activated automatically when no movement has been detected, with the operator defining the set time period for no movement (between 8 seconds and a maximum of 20 minutes). A simple switch, located on the driver, is used to activate the corridor function. Switch to ‘on’ and the light output will dim to 15% of its rated lumen output when no movement is detected. Switch to ‘off’ and the light output will turn off when no movement is detected. Designed to be quick to install and simple to use, the Inceptor EVO Bulkhead offers a number of features and benefits unmatched by competitor products. As well as integrating the control gear and the light source within the diffuser, the bulkhead has the added benefit of a Flow plug which allows for fast and simple connection and disconnection for testing and maintenance of the luminaire. Scolmore believes the Inceptor EVO is the only bulkhead currently available to incorporate a Flow connector. For further information, contact Scolmore on 01827 63454, or visit:


S www.scolmore.com 36 BUILDING SERVICES & ENVIRONMENTAL ENGINEER MARCH 2019 Read the latest: www.bsee.co.uk


colmore’s new Inceptor EVO LED Bulkhead offers all


Volatile Organic Compounds (VOCs) up to 6,000 ppm (parts per million), assessing the emission to any prescribed limits. Not only is exposure to VOCs harmful to the environment, but can lead to lasting health implications3. Site managers can rest assured as the Guardian2 system produces text or email alerts when limits are exceeded. For more information about the Casella Guardian2 visit:


www.casellasolutions.com


ESP launches new Two­Wire Fire Alarm System


flexible, adaptable system that will save installers time and money on the installation process. Unlike standard


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conventional four wired systems where the sounders and detectors for each zone are wired on separate circuits, MAGDUO utilises intelligent Two­ Wire technology, which allows all devices to be wired on the same pair of wires – enabling it to use a single circuit per zone both for detection and to power the sounders. It offers the capacity for up to 32 devices per zone (dependent on the Device Loading Unit (DLU). This advanced technology can reduce both installation and material costs. The FlexiPoint detector brings further versatility and convenience to this new range. As well as offering 7 different modes of fire detection including


SP’s new MAGDUO Two­Wire fire alarm system is a highly


combined heat and smoke, it is also available with an inbuilt sounder or inbuilt sounder strobe, which will assist with a compact install solution (as the detector and sounder is all­in­one as opposed to separate units). Due to the different options, FlexiPoint offers convenience for wholesalers and installers, as they will not be required to carry a complete range of devices. For further information, contact


ESP on 01527 515150, email info@espuk.com or visit:


www.espuk.com


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