Eaton CROUSE-HINDS Series Operating Instructions Manual

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

Contents

Eaton CROUSE-HINDS Series Operating Instructions Manual Manual pdf 9 page image

96011601960606062606560336170. 021. 023. 024. 061. 063. 066. 067. 049. 037. 191EControl switch, GHG 292 and control switch with measuringinstrument, GHG 293Switch mechanism4 5 6Special switchmechanism7 8 9Contact arrangement CircuitryEX 29 control switch Code2 Safety instructionsTarget group:For skilled electricians and qualifiedpersonnel in accordance withnational legislation, including the relevantstandards and, where applicable, in acc.with IEC/EN 60079-14 on electrical appara-tus for explosive atmospheres.The temperature class and type of protec-tion stated on the apparatus shall beobserved.Modifications or changes to the controlswitches are not permitted.They shall be used for their intendedpurpose and shall be in a perfect and cleanstate.The requirements of the IEC/EN 60079-31regarding excessive dust deposits andtemperature to be considered from the user.Prior to being put into operation, thecontrol switches shall be checked inaccordance with the instructions as persection 6.Before initial operation, any foreign mattershall be removed from the apparatus.Warning:Observe the minimum terminal crosssections of the control switches accordingto the rated currents (see Technical data,page 8).The national safety rules and regulations forthe prevention of accidents, as well as thesafety instructions included in theseoperating instructions, that, like this text,are set in italics, shall be observed!3 Conformity with standardsThe apparatus is conform to the standardsspecified in the EU-Declaration of conformity,enclosed separately.References to standards and directives in theseoperating instructions always relate to the latestversion. Other additions (e.g. details relating tothe year) shall be observed.The apparatus are conform to the standardsspecified in the EC-Declaration of conformity,enclosed separately.4 Field of applicationThe control switches are intended for use inpotentially explosive atmospheres in zones 1and zones 2 as well as in zones 21 and zones22 in accordance with IEC/EN 60079-10-1 andIEC/EN 60079-10-2!The enclosure materials used, including anyexternal metal parts, are high quality materialsthat ensure a corrosion resistance andresistance to chemical substances according tothe requirements for use in a ”normal industrialatmosphere”:- glass-fibre reinforced polyester- impact resistant polyamide- special steel AISI 316 LIn case of use in an extremely aggressiveatmosphere, please refer to manufacturer.5 Application / PropertiesThe control switches are used for the localswitching of electric drives in potentiallyexplosive gas atmospheres.The design of the switch contact block (withmax. 3 levels = 6 contacts) is dependent uponthe respective application.Details relating to the electric contacts can befound on the switch contact block.Specially marked special versions of the controlunits can be used in ”intrinsically safe circuits”.The electrical limiting values that are decisivefor the intrinsic safety shall be observed.The version with gold-tipped contacts is suitedfor switching extra-low voltage circuits. Specialattention shall be paid to the maximum currentload (see technical data, page 8). The contactchamber of the gold-tipped version is markedwith the letter ”G” or colour-coded.To ensure a safe and reliable disconnection,compulsory opening contacts are standard.A safe and reliable closing of the special contactis achieved by a special version of the compul-sory closing contact. The contact chamber of thecompulsory closing contact is marked with theletter ”Z” or it is also colour-coded.The measuring instruments are used to indicatethe pick-up current of the respective electricalapparatus (single phase).See ”Technical Data” for details of measuringmechanism, accuracy and connection.Max. safe voltage Um: 690 VeffSafe galvanic isolation from all other circuitsand earth1.3 Intrinsically safe switch circuits: