Eaton CROUSE-HINDS Series Manual

Also see for Crouse-hinds series: Operating instructions Instruction manual Operating instructions Operating instructions Instruction manual

Contents

Eaton CROUSE-HINDS Series Manual Manual pdf 8 page image

8Fig. 12 Safety instructionsTarget group:For skilled electricians and suitable qualified, instructedpersonnel in accordance with national legislation, includingthe relevant standards and, where applicable, in acc. withIEC/EN 60079-14 on electrical apparatus for explosive atmospheres.The switches GHG 261 are not suited for use in Zone 0 and Zone 20.The temperature class and type of protection stated on the appara-tus shall be observed.The requirements of the IEC/EN 60079-31 regarding excessive dustdeposits and temperature to be considered from the user.To ensure adherence to the temperature class stated on the typelabel of the apparatus, the permissible ambient temperature, therated terminal cross section and the self heating of the apparatusthat is mainly due to the power dissipation shall be taken intoaccount (test criterion for the self heating is an overload of 10%).They shall be used for their intended purpose and shall be in aperfect and clean state.Prior to being put into operation, the control units shall be checkedin accordance with the instructions as per section 6.The covers of the safety switches GHG 261 can only be removedwhen the switch is in the “ON” position.The national safety rules and regulations for the prevention ofaccidents, as well as the safety instructions included in theseoperating instructions, that, like this text, are set in italics, shall beobserved!3 Conformity with standardsThe switches GHG 261are conform to the standards specified in theEU-Declaration of conformity, enclosed separately.References to standards and directives in this manual always refer to thelatest version. additional supplements (for example, date information)must be observed.4 Field of applicationThe switches GHG 261 are intended for use in potentially explosiveatmospheres in Zones 1 and 2 as well as in Zones 21 and 22 in accord-ance with IEC/EN 60079-10-1 and IEC/EN 60079-10-2.The enclosure materials used, including any external metal parts, are highquality materials that ensure a corrosion resistance and resistance tochemical substances according to the requirements for use in a ”normalindustrial atmosphere”:– impact resistant polyamide– special steel AISI 316 L.For use in an extremely aggressive atmosphere, please contact yourCooper Crouse-Hinds agent for additional information on the chemicalstability of the plastics used.5 Application / PropertiesDue to the AC 3 motor switching capacity of the switches GHG 261,reliable isolation (switching) is also possible during operation.The switches GHG 261 fulfil the isolating properties according toIEC/EN 60947-3.In addition to this, the switches GHG 261 are so designed, that they alsoswitch off the drive, e.g. via the contactor that precedes the auxiliarycontact. In relation to the main contacts, this auxiliary contact is laggingwhile making and leading while breaking.Versions with gold-tipped auxiliary contacts are suited for switchingextra-low voltage circuits. Special attention shall be paid to the maximumcurrent load (see technical data). The contact chamber of the gold-tippedversion is marked with the letter ”G” or colour-coded.Due to the mechanical design of the switches GHG 261, compulsoryopening of the contacts is possible.To prevent unauthorized switching, the switches GHG 261 can be lockedin the ”OFF“ position by means of 3 padlocks, see fig. 1, (shacklediameter of the padlocks up to 4 to 6 mm).See technical data, for the temperature class, explosion group andpermissible ambient temperature.The data according to sections 3 and 4 shall be taken into account duringuse.Applications other than those described are not permissiblewithout a written declara-tion of consent from Messrs. COOPERCrouse-Hinds.During operation the instructions stated in section 7 of the operatinginstructions shall be observed.The sole responsibility with respect to the suitability and proper useof the control switches with regard to the basic requirements ofthese instructions (see technical data) lies with the operator.GBExplosion-protected safety switch, main switch,load disconnect switch 10 A, GHG 261