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Surge protection - the what, how and why
There are various terms used to describe surge protective devices (SPDs), such as arrestors, lightning arrestors, surge arrestors, transient voltage surge suppressors (TVSS), surge diverters and surge protectors. The term surge filter or surge reduction filter usually refers to a series surge protector. However, all series-connected SPDs are not surge reduction filters. This article will explain the purpose and the operation of SPDs and the key selection criterion for selecting and specifying an SPD.
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Protecting against electrical surges - 20 things you should know
All electrical installations are subject to a frequently distorted electricity supply. Uncontrollable anomalies such as lightning strikes and electromagnetic interference can and do distort the AC supply into buildings. Some can be catastrophic, destroying equipment from a single surge, while others can be too small to notice on their own, but have a cumulatively detrimental effect on equipment that inexplicably fails over time. But there are simple ways to deal with these challenges.
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Harmonics - fighting the enemy from within
The push for ‘greener’ electricity through more sophisticated electrical technologies has, in many cases, increased the negative consequences of harmonics on our electrical infrastructure. Electronic ballasts for lighting, switchmode power supplies for PCs and variable speed drives for motor controls are becoming ubiquitous in our homes and workplace. But while they’re improving our energy efficiency, they’re also making the electricity supply dirty.
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Why should a disconnection device be dedicated to a surge arrester?
A surge arrester is subject to electrical surges caused by lightning strikes and overvoltage throughout its service life. The surge arrester evacuates the current by creating an irreversible internal short-circuit. This white paper explains why a disconnection device should be dedicated to a surge arrestor.
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Littelfuse AK15 transient voltage suppressor device range
Littelfuse has introduced its AK15 series of transient voltage suppressor devices to prevent the destruction of electronic gear from high-energy transients.
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Schneider Electric Quick PRD surge protector
The Quick PRD surge protector provides protection against induced or conducted surges resulting from indirect lighting strikes. The product features remote end-of-life signalling and requires limited maintenance. It is simple to install with an easy-to-earth terminal and it can be installed directly into the switchboard frame.
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Hager B&R One Module Add-on Block
The One Module Add-on Block provides three-phase earth leakage protection and reduces installation time and the panelboard size, thus combining the essential elements of modular design and functionality.
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DEHNguard M...CI surge arrester with backup fuse
The DEHNguard M...CI provides protection against overvoltages including short-circuit protection in a space-saving design of only one module per path.
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TSi Power Corporation outdoor voltage regulators
The VRx precision voltage regulators from TSi Power Corporation are designed for outdoor use and suit applications including mobile phone cells, microwave relaying stations, remote telemetry, etc. The VRx voltage regulators are packaged in an IP65 (NEMA 44) housing making them washdown and corrosion resistant. They withstand stressing environmental conditions including ambient temperatures ranging from -20 to + 50°C, humidity to 90% and altitudes to 3300 m.
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Noark Ex9 series circuit breakers
Noark’s Ex9 series of products combines the streamline structural design and the electric and emulation technology based on 54 exclusive patents. The Ex9M moulded case circuit breaker offers protection for circuits and electrical equipment in overload, short-circuit and undervoltage situations. The circuit breaker deviates from traditional linear forms and instead features a gentle arc at the front, giving the product an attractive look and pleasant working feel.
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ABB Biotemp filled power and distribution transformers
Biotemp filled power and distribution transformers offer increased overload capability without compromising insulation lifespan under normal loading conditions.
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Dehn + Sohne Blitzductor XTU arresters
Dehn + Sohne’s Blitzductor XTU arresters are combined lightning current and surge arresters for protecting information and automation systems. The nominal voltage is not specified, but the arrester can be used for all voltages in the range of 0-180 VDC.
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Legrand Soliroc heavy-duty, protective frames
Soliroc is a range of heavy-duty, protective frames to deter vandals from damaging wiring devices installed in exposed, public and unsupervised spaces. The metal alloy finish provides a strong resistance to scratches, graffiti and lighter flames. To deny unauthorised access to wiring devices, curved edges make it difficult to gain a firm grasp of the protective frame and plugs cannot be removed once installed. For additional security, there is also an option to have lockable flaps to cover the mechanisms.
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Conservelec Sun Power Light Saver energy-saving device
The Sun Power Light Saver energy-saving device, when installed on the light circuit, adjusts optimal voltage for each lamp according to electricity supply conditions enabling a reduction in electricity consumption of a claimed 20%+. It is suitable for all fluorescent lights and high-intensity discharge lamps.
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Cirprotec hardwired CPS Nano transient surge diverters
The Cirprotec hardwired CPS Nano transient surge diverters use multi-discharge system technology and voltage and projection status indication LEDs and are wall or flush mounted.
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DEHN + SOHNE Blitzductor XT lightning current and surge arrester
The Blitzductor XT pluggable combined lightning current and surge arrester is designed for four signal wires and features three arrester modules that protect the Dupline Bus of devices with protective diode circuits at the input and bus systems in Ex zone 1.
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DEHN + SOHNE DEHNguard M YPV SCI 600, M YPV SCI 1200 surge arresters
The DEHNguard M YPV SCI 600 and M YPV SCI 1200 are UL-approved surge protection devices, designed to offer safety and protection for photovoltaic (PV) installations.
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Upsonic power surge and spike protection power board
The Upsonic power surge and spike protection power board is designed to protect and fit with home theatre audiovisual components, offering 3672 J of protection with a response time of less than 1 ns.
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Cirprotec lightning, surge and overvoltage protection
The Cirprotec range of lightning, surge and overvoltage protection products includes DIN-style surge diverters, high-capacity (kA) surge diverters for incoming main switchboards and data and communication surge diverters for I/O and control applications.
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PD Devices MDSP3 surge protector
The PD Devices MDSP3 series surge protector devices provide protection against incoming high-voltage spikes and slower rise time disturbances for three-phase 415 V circuits. They are designed for use on incomers at main switchboard level and can be combined with PD devices suitable for lower transient capacity at sub-distribution board level.
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Active harmonic filter
The Schaffner ECOSine Active 60 A filter is designed for harmonics mitigation in commercial and industrial electrical installations where loading can change rapidly and unpredictably.
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Load distribution module
The Benbro Load Distribution module is designed for use with modular 300 series Eurocard DC-DC converter systems.
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Home automation surge protection
The Critec SRF DIN rail mount surge reduction filter is designed to protect against power surge damage and is installed at the main switchboard to help protect the home automation controller, security and audio equipment, home theatre and other equipment.
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Noise suppression chokes
Schaffner noise suppression chokes cover symmetrical (differential) and asymmetrical (common-mode) noise suppression.
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Surge protection
The SLT range of threaded instrument protectors provides surge protection for most forms of industrial monitoring and control.
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Surge protection devices
The Multi 9 range of surge protection devices has been extended to include 120 kA rated products. The range now offers an extended working life through its higher level of protection against electrical surges.
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FA series single-phase active harmonic filters
The AIM FA series single-phase active harmonic filters are designed to isolate harmonic currents and thereby protect equipment on power distribution systems.
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OSM recloser test set
The Noja Power interface test set uses Rogowski transformers to convert an injected current signal into a voltage signal.
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Surge arrestor
The PU I series of Class I overvoltage protectors with varistor technology offers a discharge capacity of 12.5 kA (10/350 µs). The pluggable, self-monitoring surge voltage arresters are optionally available as 1-, 3- or 4-pole versions and with optional remote signalling contacts.
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Surge-protected power board
The Entertainment power board is a six-outlet electrical distribution unit specifically designed to protect sensitive electrical equipment such as entertainment equipment.
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