SUPPLEMENT PRODUCTS HAZARDOUS AREA EQUIPMENT
ATEX CERTIFIED HUMIDITY AND TEMPERATURE SENSORS
The Rotronic Intrinsically Safe HygroFlex5-EX series of humidity, moisture and temperature sensors were developed for easy installation in areas where there is a risk of explosion due to dust or gas in the environment. They were designed to meet the demanding requirements of the oil and gas industry as well as the pharmaceutical, biotechnology and food industries, and will be suitable for hazardous applications elsewhere. Conforming to the latest international standards, the Rotronic HygroFlex5-EX transmitter is
galvanically isolated; there is no need for an intrinsically safe power supply, ‘clean’ earth or Zener barrier thereby saving costs and installation time. ATEX certified probes are available for all applications. The intrinsically safe transmitters have two
channel 4...20mA outputs selected from temperature, humidity or a moisture value such as dew point or ‘absolute humidity’ (for example Mixing Ratio g/kg). These can be freely scaled exactly as required, using Rotronic HW4 software, for the process being monitored or controlled. Some of the main features include stainless steel probes certified for ATEX Zone 0/20, standard and cable mount probes with a screw-in probe for pressure applications and a HygroFlex5-EX measurement transmitter certified for Zone 1/21. As well as this an intrinsically safe power supply is not required and the transmitter is galvanically isolated. Wall and duct versions are available and an LC display is an option.
Rotronic
www.rotronic.co.uk
FIRE RATED JUNCTION BOXES AND ENCLOSURES
When designing a new lighting scheme for applications that require the use of Fire Rated cables the enclosure or junction box could be an integral key part of the overall electrical scheme. This element is often overlooked. Ce-Tek manufacture two series of Fire Rated Junction boxes: CEP, made from Glass reinforced polyester with thick walls, and CEX, made from 316L Stainless steel. These two ranges have been tested to and passed for use to IEC331 at 750°C for three hours and BS6387 CWZ (C is Resistance to Fire alone, W is Resistance to Fire with Water and Z is Resistance to Fire and Mechanical shock) at 950°C for three hours. Both family series of Fire Rated Junction boxes comply with BS8519-2010 for Life Safety Applications which states that the junction boxes need to be rated to the maximum temperature of their internal components. For designers and
consultants for electrical wiring schemes Ce-Tek can offer a clear option to maintain the integrity of the safety critical circuits in buildings, rail infrastructure projects, tunnels and oil and gas installations.
Ce-Tek
www.ce-tek.co.uk T: 01234 567890
SPACE AND COST SAVING
WAGO’s ATEX-approved TOPJOB S is suitable for connecting motors, diodes or LEDs in harsh environments from an offshore platform to hazardous atmospheres in the chemical industry. All conductor types from 0.14mm2
to 25mm2 including stripped, solid,
stranded and fine-stranded with ferrules, can be simply pushed into the terminal block using WAGO’s Push-in Cage Clamp technology, thereby eliminating the need to tighten screws. Proportional clamping means the spring adjusts automatically to the conductor size, so once the wire is pushed in, it is held securely and indefinitely. For connecting fine-
stranded conductors an operating tool is inserted into the slot allowing for hands- free wiring. The tool also helps identify which clamping unit is open. To remove a conductor the tool is re-inserted into the slot. The product family
includes single-, double-, triple- and quad-deck terminal blocks as well as fuse, disconnect and diode
terminals. The TOPJO S rail mounted terminal blocks enable all of the above conductor types to connect one size greater than their rated cross section. This saves up to 25 per cent on wiring space and costs. TOPJOB S can withstand shocks of up to 500G and vibrations of up to 20G,
making it suitable even in harsh operating conditions such as underground, offshore, or in heavy industrial applications. TOPJOB S rail-mounted terminal blocks are quickly and clearly labelled using
continuous marking strips. Using free software, the strips can be printed with four lines of information with sufficient space to designate each module and its function. This ensures wiring accuracy and saves time and waste.
WAGO
global.wago.com/uk
S18 APRIL 2016 | ELECTRICAL ENGINEERING
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