Supply, Overcurrent Protection and Power Distribution in a Single System

E-T-A’s compact and flexible REX system represents a comprehensive  'All In One'  DC 24 V protection and distribution solution for machine and panel builders

What are the benefits of our all-in-one solution?
The REX12 is a perfectly matched system with an optimised number of components and functionalities.  All-in-one solution means: Central input + protection + power distribution in one complete system. This creates considerable time and cost advantages.

Your Benefits:
* Increases machine uptime – through clear failure detection, high transparency and remote diagnosis
* Flexibility is ensured – through ease of assembly or disassembly, modular design and convenient adjustment
* Saves 50 % time – through innovative and flexible connection technology
* Saves costs – as no further accessories are required
* Saves space - because each module has a width of only 12.5 mm

Are you looking for condition monitoring and predictive maintenance?
Storage and evaluation of all data logged in machinery and plants is the precondition for industry 4.0 solutions on the score of “condition monitoring” and also “predictive maintenance”. Our power distribution and protection system REX12 will help to enhance transparency in your plant and consistency of your systems.

International Standards: UL 508, NEC Class2, EN 60204-1
Besides the UL508 approval and NEC Class2, the REX12 exclusively meets the requirements of cable protection to EN60204-1. This is possible because the internal fail-safe element in the shape of a blade fuse corresponds to the current rating of the circuit protector in question. Concretely, this means that the current rating of the protector and the rating of the fail-safe element are identical.

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Schurter's T9 fuseholder style circuit breaker series is now expanded to include a version for vertical PCB mounting. The new T9-817 model completes the existing range, which includes a horizontal PCB version, and three different panel mount styles. The full range of mounting styles provides a form and fit alternative to equivalent closed fuseholders.

The T9 family of thermal circuit breakers provides an array of mounting styles alternative to industry standard closed fuseholders, including vertical and horizontal mounted PCB types, and three different panel mount styles with quick connect terminals: snap in or nut fastened, including a threaded neck rear-mount style. The newest addition, T9-817 PCB for vertical PCB mounting, reduces assembly costs and saves board space, by eliminating assembly hardware and wires. It sports a slim design and a small cylindrical push-to-reset button, which protrudes minimally through the panel opening. A spring pushes the button out further when the device trips.

Circuit breakers are an ideal alternative to fuses, since fuses are known to age, due to pulse or high surge currents, and thus trip prematurely. Circuit breakers prevent unnecessary down time by eliminat-ing the need for fuse replacement, as well as the associated risk of inadvertently inserting a fuse with the incorrect current rating. The T9 series thermal circuit breaker is therefore intended as an alternative to 5x20 or 6.3x32 mm fuses used with closed fuseholders.

Typical applications for circuit breakers include power supplies, UPS systems, PDUs, electric tools, mo-tor drive applications, medical diagnostic equipment, commercial kitchen appliances, lighting fixtures, HVAC products as well as equipment for sports and leisure activities. The T9 series is also available on request with glow-wire tested (GWT) materials and is therefore suitable for unattended household appli-ances. The T9 product line conforms to UL 1077, CSA C22.2 235 and IEC 60934 standards. It is cURus, VDE and CCC approved.

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Home Page: https://www.epreston.co.uk/epblog/

Schurter is merging its expertise in the area of robust metal switches with reliable circuit breakers into a unique product: the T12-MSM is the first circuit breaker on the market that is extremely attractive from a visual standpoint. With its extraordinary actuating appeal, the T12-MSM need not be used as just another switch to be hidden on the rear of the equipment; rather it can be stylishly displayed on the front.

Schurter combines its circuit breakers with thermal operation (T12) and thermal-magnetic operation (TM12) with its MSM series metal switches. The T12-MSM, creates a market innovation that marries overcurrent protection with an attractive pushbutton design. The MSM switches are characterized by their visual appeal and operating characteristics. Both the housing and the actuator are fabricated from high-quality stainless steel, and there are a variety of design options including size, color, lighting and inscription.

The T12 and TM12 are reliable circuit breakers with positive trip-free operation. The contacts open even if the reset button is manually held in the closed position. They reliably protect equipment with rated currents from 50 mA to 16 A. The optional magnetic release, protects against increased risk of short circuits.

The combination of the T12 circuit breaker and the MSM switch now unites all these features in product that is also extremely robust. With a vandal-proof design, IP 64 tightness protection and IK 07 impact resistance, the T12-MSM is also suited for outdoor applications and use in harsh environments. Additionally, the look and feel is novel for a circuit breaker and stands out among other circuit breakers as a true designer piece, suitable for mounting on the front side of the equipment, where an appealing design is paramount. The T12-MSM offers unprecedented product-design opportunities for applications where moderate overcurrents can occur. Among its wide range of possible uses are applications requiring electromechanical shielding, outdoor applications, and especially applications with electric motors.

Technical Information / Approvals
- T12-MSM or TM12-MSM circuit breaker with stainless steel actuator
- Rated voltage: 240 VAC / 28 VDC
- Rated current: 50 mA - 16 A (15 A UL)
- Thermal – magnetic or thermal tripping
- Manual On/Off actuation
- Available with auxiliary contact or shunt terminal
- Quick-connect or screw-clamp terminals
- Threaded neck type
- Actuator available in 19 mm and 22 mm diameters
- Optional point or ring illumination
- A variety of labeling options
- Tightness according to IP64
- Vandal-proofed according to IK07

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Schurter now offers its popular TA35 thermal circuit breaker with a new antibacterial protective cover, type CZM25.  This allows the TA35 to be used in applications designed to thwart the spread of bacteria, such as equipment used in medical and laboratory facilities, as well as food production plants.

The antibacterial effectiveness of the cover has been tested and confirmed according to ISO 22196, particularly the protection against the growth of Escherichia coli and Staphylococcus aureus bacteria strains. Additionally, the silver ions contained in the protective cover prevent the growth of numerous other organisms.

The circuit breaker combined with the antibacterial cover is ideal for use in equipment where hygiene plays an important role, including equipment subjected to rigorous wash downs. The transparent antibacterial cover on the TA35 carries an IP65 rating to protect against the ingress of water and dust. It also withstands the use of common cleaning agents and disinfectants.

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E-T-A Circuit Breakers, quality designer and manufacturer of a broad range of electro-mechanical and electronic  products for circuit protection, has introduced a new, simplified, low-cost, decentralised  electrical  power  distribution system, each module offering up to 10 outputs rated up to 8A/10A per channel. E-T-A  PowerPlex  Compact provides localised monitoring, control and reliable protection of safety-critical electrical circuits, at the same time offering reduced cabling costs and build time. Communication with the PowerPlex modules is via CAN-bus using SAE J1939 based protocols. Each localised module will handle up to 60A, providing programmable control based on up to 12 digital and 3 analogue inputs as well as programmable overload protection.

Currently available as a 12V DC version, E-T-A PowerPlex Compact is straightforward to install and can be used for  applications such as battery monitoring of split charging circuits, undervoltage monitoring and control, remote operations based on level and flow sensors, responding to limit switches in tail lifts, dimming of lights and for timed controls. It will switch loads and protect them and the electrical harness against overcurrent and short circuits. Featuring high-end power semiconductors with integral protective elements for switching and protection, there are no mechanical components such as relays which may be subject to wear, vibration and shock.

One or more PowerPlex modules are positioned as required around a vehicle to facilitate the local connection of  loads, switches and sensors. Each module can collect sensor data from level and temperature sensors, for example.  E-T-A  PowerPlex is an open system featuring two CAN-bus communication channels which enable control via an E-T-
A  touch  panel or  keypad(s), if required, to enable load switching, and monitoring and display of data from analogue and digital sensors.

The  initial programming of each module via a cable linked PC is straightforward, using configuration software  supplied with the product. It enables, for example, the linking of inputs and outputs, programming of timer  functions and activation of dimmers. The current ratings for overcurrent protection of the load circuits and time characteristics can also be programmed.

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UP1 Undervoltage Release Switch for Operators Safety

The new UP1 undervoltage switch monitors the supply voltage and actuates a trip release when there is an intense drop in voltage or when the supply voltage is interrupted. As soon as the supply voltage returns in full, the machine or equipment does not automatically restart in an uncontrolled manner, but must be consciously switched on again. Using this function, dangerous situations for operating personnel as well as for the surroundings of the device itself can be prevented.

The UP1 is a 2-pole circuit breaker with additional undervoltage monitoring actuates a trip re-lease with a loss of voltage or an intense voltage drop. The breaker is available with rocker actuation for snap-in mounting or with push-button actuation for both snap-in mounting as well as screw fitting. Protection covers against the ingress of dust and spray water make the use of the breaker in harsh environments such as wood-, masonry- or metal-workings possible.

The requirement for the use of undervoltage protection is in existence for applications such as gardening equipment, gardening shredders, floor cleaning and sanding devices, electrical tools such as circular saws, band saws, grinding machines and drills. Further examples are fuel pumps, coffee-milling devices, fruit juice squeezing machines and fruit juice centrifuges.

The UP1 undervoltage circuit breaker is configured differently in its hardware for various net-work supply voltages und must be therefore ordered for the appropriate supply voltage. Rated switching category is AC-1 16A / AC-3 14.5A @ AC 240 V. The breakers are approved to IEC 60947, UL 508, CSA 22.2 No.14-95 and also contain a horsepower rating.

Technical Characteristics:
- 2-pole switch
- Undervoltage trip release with restart prevention
- Available with rocker or push-button actuation
- Dust and jetting water protection to IP 65
- VDE & cURus approvals for rated currents AC-1 16A / AC-3 14.5A @ AC 240V

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Finder has introduced surge protection devices (SPD) designed specifically for photovoltaic (PV) panel installations.  Additions to its popular 7P Series of SPDs, three new Type 2 surge arresters will protect PV systems from the effects of lightning strike and electrical switching transients.  The products are already supporting the company’s own PV panels at its primary manufacturing plant.

Featuring encapsulated spark gap and/or replaceable varistor modules, the three devices protect the more vulnerable DC side of commonly used earth free and mid point earthed PV systems.  The range includes: the 7P.26.9.420, providing 2 varistors and 1 spark gap for 420V DC systems; the 7P.23.9.700, providing 3 varistors for 700V DC systems and the 7P.23.9.000, providing 3 varistors for 1000V DC systems.

Each device integrates both a visual indicator and a signalling contact to warn when a varistor module needs replacing.  Connection to the signalling contact is via a convenient plug-in terminal block.  The SPDs comply with EN 61643-11 standard and can be 35mm rail (EN 60715) mounted.

Finder’s introduction of a range of SPDs tailored to the needs of PV installations comes at a time when UK government Feed-In Tariffs (FITs) appear to have stimulated a step increase in interest in PV system in the country.  The UK is now the fastest growing market for PV solar energy installations, estimated to produce 96MW of electricity in 2010 compared with 6MW in 2009.

At the same time, a prospective revision of the UK wiring regulations, placing far more emphasis on the provision of protection from electrical surges, has meant there is a resurgence of interest in associated products, in particular varistor and spark gap type SPDs.

PV panels at Finder’s prime manufacturing site in Almese near Turin in North West Italy have been producing an output power of 55kW since early 2009, equating to 61,000 kWh/year.  So pleased with the performance, the company has this month commissioned a further 60kW of PV panels, which of course will be protected by the new 7P Series surge arresters.

Constructed using multicrystalline silicon PV modules, Finder’s initial PV system is calculated to have reduced CO2 emissions by about 37 tons/year, achieving annual cost savings of around 11 TOE (tonnes of oil equivalent).

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With over 26,000 combinations Bulgin’s Polysnap mains power inlet modules offer a very adaptable and flexible solution to panel design.

Click HERE for Polysnap Catalogue

Polysnap allow combinations of mains inlets and outlets, filtered inlets, switches, fuseholders, voltage selectors, indicators and circuit breakers mounted in either horizontal or vertical format bezels ready for quick snap-fit assembly. The compact design occupies the minimum of panel area and a single rectangular mounting hole, offering easy installation for this mains power entry module.

To complement Polysnap the Polyflange range offers a flange fixing alternative for designers who prefer the security of screw fixing. All types and variations are available through Bulgin’s extensive
distribution network.

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Home Page: https://www.epreston.co.uk/epblog/