Eaton Crouse-Hinds Series Operating Instructions Manual

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175 Application / PropertiesThe control units GHG 432 and 434 areintended for the local control of electricalinstallations in potentially explosive atmo-spheres. The units are fitted with built-incomponents according to the respectiveapplication.Specially marked special versions of the controlunits can be used in ”intrinsically safe circuits”.Where required, the bases are fitted with0.6 W resistors, fine-wire fuses and diodes(max. power dissipation 1 W).The electrical limiting values that aredecisive for the intrinsic safety shall beobserved.The version with gold-tipped contacts is suitedfor switching extra-low voltage circuits. Specialattention shall be paid to the maximum currentload (see ”Technical data“, pages 12 and 13).The contact chamber of the gold-tipped versionis marked with the letter ”G” or colour-coded.To ensure a safe and reliable disconnection,the normally closed contacts are designed ascompulsory opening contacts.When the switch collar of small controlswitches is cut out at the respective lockingposition, they can be padlocked (padlockshackle Ø up to 5 mm).Ex 23 control switch actuator elements shall beprovided with a drilled hole, Ø 5.5 mm, at therespective position on the switch collar and canthen be padlocked as described above.The 4 pole pushbutton contact can be addedwith the standard CCH actuators.If the 4 pole pushbutton contact is added withan Emergency STOP Mushroom-headpushbutton actuator, then you have to use theactuators with CCH order numberGHG 410 1437R.This actuators can be recognize by the redthrust washer and black inserting sign.The measuring instruments AM 72 and AM 45are used for the local indication of electricalvalues. See ”Technical data” for detailsof measuring mechanism, accuracy andconnection.With measuring instruments for c.t. connectionn/1A (Fig. 1, item 2) the interchangeable scalescan be exchanged via a flap on the upper part ofthe measuring instrument (Fig. 1, item 1).The data according to sections 3 and 4 shallbe taken into account during use.Applications other than those described arenot permissible without a written declara-tion of consent from Messrs. COOPERCROUSE-HINDS / CEAG.During operation the instructions stated insection 7 of the operating instructions shallbe observed.The sole responsibility with respect to thesuitability and proper use of the controlswitches with regard to the basic require-ments of these instructions (see ”Technicaldata“) lies with the operator.6 InstallationThe relevant national regulations(e.g. Betr.Si.V,the equipment safety law for Germany) and thegenerally recognized rules of engineering applyfor the installation and operation(IEC/EN 60079-14).The improper installation and operation ofcontrol units may result in the invalidationof the guarantee.6.1 MountingThe control units GHG 43. can be mountedwithout opening the enclosure.When the control units are mounted directlyonto the wall, they shall rest evenly only on thefastening points provided for this purpose.The screw chosen shall fit the fixing hole (seedimensional drawings, page 12) and shall notdamage the hole (e.g. use of a washer).The apparatus shall be fixed diagonally with aminimum of 2 screws.If the screws are overtightened, theapparatus may be damaged.The control units GHG 432 and GHG 434 aresuited for mounting on COOPER CROUSE-HINDS / CEAG apparatus holders by means ofself-cutting screws (see pages 19).See the respective mounting instructions.GBExplosion-protected control units GHG 43.Actuator 1 x 4 poleActuator 2 x 2 poleMushroom-head pushbutton actuator”EMERGENCY STOP“ GHG 410 1437R....2122 4443R1343311124443R23433242314132122R31112414231324443R43433242311122122R511123132 4443S 1S 2S 4S 3S 2S 4S 3S4S 12122 4443R1343311124443R23433242314132122R31112414231324443R43433242311122122R511123132 4443S2 S3S1thrust washerredinserting signblackbaseyellowS4S2 S3S1