Eaton CROUSE-HINDS Series Operating Instructions Manual

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Contents

Eaton CROUSE-HINDS Series Operating Instructions Manual Manual pdf 11 page image

116.2 Opening apparatus /Electrical connectionBefore opening the apparatus, it is neces-sary to ensure that there is no voltage or totake suitable protective measures.The electrical connection of the may only becarried out by specialists.The properly bared conductors of cables shallbe connected with due regard to the respectiveregulations.To maintain the explosion protection,conductors shall be connected with specialcare.The insulation shall reach up to the terminal.The conductor itself shall not be damaged.The minimum and maximum conductorcross sections that can be connected shallbe observed (see technical data).In the case of mixed Ex-e / Ex-i installations,the required minimum clearances shall bemaintained (see, for example,IEC/EN 60079-11).When apparatus is open, it is necessary toensure (disconnect voltage supply) that novoltage is carried over into the connectedintrinsically safe circuits.All screws and/or nuts of connection terminals,including those not in use, shall be tighteneddown securely.Excessive tightening may affect or damagethe connection.The terminals are designed for the directconnection of conductors with copper wires. Ifmulti- or fine-wire connecting cables are used,the wire ends shall be handled according to theapplicable national and international regulations(e.g. use of multicore cable ends).The position of the terminals can be found inthe connection diagram or the diagram showingthe contact arrangement of the switch insert onpage 8.With measuring instruments for c.t. connectionn/1A (Fig. 1) the interchangeable scale, item 1,can be exchanged via a flap, item 2, on theupper part of the measuring instrument.To ensure a correct closing of the manual motorstarter, switching at the switch shaft of theswitch insert when the apparatus is open is notpermitted.If, to facilitate the feeding of conductors into theenclosure, the switch insert is snapped out ofthe rail on the enclosure base by releasing thecatches (top or bottom on insert), it shall besnapped back properly into the same notch inthe enclosure base before the electricalconnection. When fitting the apparatus cover,care shall be taken to ensure that the switchshaft of the switch insert engages correctly inthe carrier hole of the switch handle (payattention to the correct position of the switchhandle).6.3 Cable entries (KLE);blanking plugsGenerally only certified cable entries andblanking plugs may be used.Flexible cables shall be used with trumpet-shaped cable glands or other suitableentries with additional pull relief.When using cable entries with a degree ofprotection that is lower than the IP protection ofthe apparatus (see page 8), the degree of IPprotection for the complete unit is reduced.The relevant mounting directives for cablesentries being used shall be observed.In order to ensure the minimum degree ofprotection, any unused entry holes shall besealed with certified blanking plugs.When fitting cable entries, care has to be takenthat the sealing inserts are suitable for the cablediameter.In the case of sealing inserts that are cut out,it is necessary to ensure that the insert isproperly adapted to the cable diameter.Intrinsically safe circuits shall be fed throughcable entries that are colour-coded (light blue).In order to ensure the required minimumdegree of protection, the cable entries shall betightened down securely.Overtightening can impair the degree ofprotection.Warning: When tightening the cap nut of themetal cable entry (e.g. type ADE 1F),a suitable tool shall be used to safeguardthe gland against twisting.Any unused metric CCH / CEAG cable entriesshall be sealed with the blanking plug certifiedfor these metric cable entries.EControl switch, GHG 292 and control switch withmeasuring instrument, GHG 29321Fig. 1