Polar Zone
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polar zone components and systems for extreme temperatures

Our customers’ safety in their day-to-day work is the main focus of our business. The company has been working towards this for over 80 years and has had a major impact in the sector of explosion protection. Development of explosion protected, electrical control devices and control units was speeded up consistently and successfully since 1926. This resulted in pioneering new developments and innovative products. R. STAHL specialists have been working actively for many years now in national and international committees to define new standards and ever better safety regulations. R. STAHL...

certified low temperatures for very The working temperature range for explosion protected electrical apparatus defined in IEC 60079, Part 0: General Requirements, extends from – 20 °C to + 40 °C. If the type plate contains no other information on ambient temperature, it can be assumed that the apparatus will operate reliably within this temperature range. Frequently however, products need to be used under ambient conditions where prevailing temperatures are either far higher than + 40 °C or are well below – 20 °C. This is case in many regions of the world in the winter months where...

uncompromising Low working temperatures may impact on explosion protection of electrical apparatus. This is why it is necessary to modify various type tests when certifying the products. For instance, 24 -hour low-temperature storage of plastic enclosures and seals is conducted at the intended minimum ambient temperature before the mechanical impact test of the plastic is made. The materials may not become so brittle during the test that leaks occur. Another example is the explosion test of the flameproof-encapsulated enclosures. Either this test is conducted at the intended low...

Low-temperature test > Polar zone simulation Pressure test > hydrostatic 3D measuring 3 > optical and tactile Degree of protection 4 > water ingress and dust ingress Measuring equipment 5 > more than 3000 regularly calibrated mechanical tools > more than 700 regularly calibrated electrical measuring equipment > own calibration lab Insulation and high voltage test 6 > 1500 V DC for control panels up to 500 V > 2500 V AC for bus bar systems and distribution panels > 5000 V AC for applications with rated voltage higher than 500 V

please notespecial aspects restrictions and Restrictions and special aspects that are important for operation at low temperatures: Restricted functionality 1 > Moving parts such as the actuators of switching elements may no longer be operable after thawing followed by freezing. > Various types of lamp, such as low-pressure gas-discharge lamps, cannot be ignited or can be ignited only with difficulty at temperatures below 0 °C and suffer a substantial loss in light output. > The accuracy of many measuring instruments drops with decreasing temperature. > Protective circuit breakers with...

7 Seals 4 > Most sealing materials become very tacky at temperatures of below –20 °C. Installation, maintenance and repair work should not be carried out at low temperatures in order to avoid destruction of the seals when enclosures are opened. > Special seals that must be stated when ordering the product can be used to seal moving parts. Cables and leads 5 > Many types of cable are unsuitable or only restrictedly suitable for use at low temperatures. > The permitted bending radius must be complied with, depending on temperature. Strip lamps 6 > The reduced light output of strip lamps,...

comprehensive the range of products Automation > Safety barriers • Single-channel safety barriers • Two-channel safety barriers > Ex i isolators • Transmitter supply units • Isolating repeaters • Switching repeaters • Binary output • Temperature transmitters • HART multiplexers • Input module • pac-Bus • Fieldbus isolating repeaters > Remote I/O • CPU & power modules • Input/output modules for analogue signals • Input/output modules for digital signals • BusRail > Fieldbus technology • Ex e/Ex i field device couplers • Ex e/Ex e field device couplers • Fieldbus power supply Positioning...

Installation switches Junction boxes Terminal boxes Plugs and sockets Couplers Coupling sockets Socket-outlet assemblies Maintenance socket isolators Cable and lead routing systems Cable glands Cable bushings Stopping plugs Lock nuts Flat rings Extensions Reducing adapters Adapters Breather glands Fluorescent light fitting Emergency lights Bulkhead light fittings Pendant light fittings Floodlights Portable lamps Emergency lighting systems Mounting accessories EEx e enclosures EEx d enclosures Lighting and heating power distribution panels Standard motor starters Safety switches Load and...

focussed on the customer For your safety > 80 years of experience and know-how with solutions focussing on explosion protection > Designing individual solutions > Major competence, recognised worldwide > Competence in efficient combination of all types of protection > Many years of experience in working together with national and international testing agencies > Involvement in national and international standardisation committees > Member of many years standing of the “Zentralverband Elektrotechnik und Elektroindustrie e.V.” > Precise overview of services thanks to the use of the ZVEI...

Services > Individual customer developments > Provision of all-in solutions for • Development • Transport • Production • Use • Packaging • Disposal > Qualified consultancy in relation to financing and direct cooperation with large national and international banks Sales order > Expert information on sales order status thanks to proximity to production > Flexibility right through to just before sales order completion > Fast, easy allowance for customer requirements even during production Production > Quality management from goods receipt through to final inspection > Certified to ISO 9001...