Eaton GHG 981 Series Operating Instructions Manual

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

Contents

Eaton GHG 981 Series Operating Instructions Manual Manual pdf 19 page image

195 Application / PropertiesDue to the AC 3 motor switching capacity of the switches GHG 981,reliable isolation (switching) is also possible during operation�The switches GHG 981 fulfil the isolating properties according toIEC/EN 60947-3�In addition to this, the switches GHG 981 are so designed, that they alsoswitch off the drive, e�g� via the contactor that precedes the auxiliarycontacts� In relation to the main contacts, this auxiliary contacts arelagging while 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 switch GHG 981, compulsoryopening of the contacts is possible�To prevent unauthorized switching, the switches GHG 981 can be lockedin the ”OFF“ position by means of 3 padlocks, see fig� 1 and 6�Switches GHG 981 - 10 A:shackle diameter of the padlocks up to 4 up to 6 mm�Preferable 6 mm�Switches GHG 981 - 25 �� 250 A:shackle diameter of the padlocks up to 7 up to 8 mm�Preferable 6 mm�The data according to sections 3 and 4 shall be taken into accountduring use.Applications other than those described are not permissible withouta written declaration of consent from Messrs. COOPER CROUSE-HINDS GmbH.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 switches GHG 981 according to the basic requirements ofthese instructions (see technical data) lies with the operator�5�1 GHG 981 �� Main-switch / load disconnect switchThe Main-switch / load disconnect switch (IEC/EN 60947) are designedfor the safe isolation of the electrical energy at all poles on equipment,machinery and drives in potentially explosive atmospheres�5�2 GHG 981 �� Safety switch; maintenance-/repair -switchThe safety switches (IEC/EN 62626-1) are designed for the safe isolationof the electrical energy at all poles while maintenance, cleaning and repairwork is being carried out on equipment, machinery and drives inpotentially explosive atmospheres�The classification according to IEC/EN 62626-1 is given�The ”EMERGENCY-STOP“ version conforms to the requirements ofIEC/EN 60204-1�A built-in locking device prevents the opening of the enclosure in the”OFF“ position�Switches, GHG 981,industrial design up to 250 A, 3 and 6-pole GBSwitchGHG 981 003SwitchGHG981 002Fig� 12 PrinciplesCautionThis symbol warns of a possible failure� Failure to observe thiscaution may result in the total failure of the device or the system orplant to which it is connected�2 Safety instructionsThe switches are not suitable for hazardous areas� Modifica-tions to the safety switch or changes of its design are notpermitted�They shall be used for their intended purpose and in perfect andclean condition.Prior to their taking into operation, the switches shall be checked inaccordance with the instructions as per section 6.Before the initial operation, any foreign matter will have to beremoved from the safety switch.The safety switch cover can only be removed in „On“ position.Observe the national safety rules and regulations for prevention ofaccidents as well as the safety instructions included in theseoperating instructions set in italics the same as this text!3 Conformity with standardsThe apparatus are conform to the standards specified in the EC-Declara-tion 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 are suitable for heavy-duty use in industrial areas!The enclosure materials employed, including the exterior metal parts, aremade of high-quality materials which ensure a corrosion protection andresistance to chemical substances corresponding to the requirements in a„normal industrial atmosphere“:– glass-fibre reinforced polyester– impact resistant polyamide– special steel AISI 316For use in an extremely aggressive atmosphere, please contact yourCooper Crouse-Hinds agent for additional information on the chemicalstability of the plastics used�