9
Before initial operation, any foreign matter shall be removed from the
apparatus.
Apparatus without a protective cap may only be built into approved
or certified enclosures, operating panels or switch cabinets.
The national safety rules and regulations for the prevention of
accidents, as well as the safety instructions included in these
operating instructions, that, like this text, are set in italics, shall be
observed!
3 Conformity with standards
The apparatus is conform to the standards specified in the EU-Declaration
of conformity, enclosed separately.
References to standards and directives in these operating instructions
always relate to the latest version. Other additions (e.g. details relating to
the year) shall be observed.
4
Field of application
The control units are intended for use in potentially explosive atmospheres
in zones 1,2 in accordance with IEC/EN 60079-10-1.
The enclosure materials used, including any external metal parts, are high
quality materials that ensure a corrosion resistance and resistance to
chemical substances according to the requirements for use in a ”normal
industrial atmosphere”:
- impact resistant polyamide
When used in extremely aggressive atmospheres, the additional data
relating to the chemical resistance of the plastics being used shall be
taken from the data sheet
GHG 902 4001 P0001.
5
Application / Properties
The control units GHG 418 .. are intended for the local control of electrical
installations in potentially explosive atmospheres. These apparatus
components are built into switch cabinets, operating panels or machinery
according to the individual requirements.
X
ATEX - IEC
For this purpose, they must be installed in suitable Ex-e enclosures
when used in explosive atmospheres.
X
ATEX - IEC
The installation of the actuator GHG41 in equipment of 2G and M2
must be tested and certified separately. At this, the thermal parameters
have to be verified among others.
X
ATEX - IEC
The creepage and clearance distance have to be fulfil the
EN/IEC 60079-7, table 1.
The version with gold-tipped contacts is suited for switching extra-low
voltage circuits. Special attention shall be paid to the maximum current
load (see technical data, page 6). The contact chamber of the gold-tipped
version is marked with the letter ”G” or colour-coded.
To ensure a safe and reliable disconnection, the normally closed contacts
are designed as compulsory opening contacts.
Where required, the bases are fitted with 0.6 W resistors, fine-wire fuses and
diodes (max. power dissipation 1 W).
When the switch collar of small control switches is cut out at the
respective locking position, they can be padlocked
(padlock shackle Ø up to 5 mm).
X
ATEX - IEC
The installation of the signal lamp GHG417 1805 in equipment of 2G
must be tested and certified separately. At this, the thermal parameters
have to be verified among others.
Apparatus versions without a protective cap are only issued with a
”Component Certificate” and may only be used if built into certified
Ex-e protective enclosures.
The apparatus versions with a protective cap are fully certified and can,
therefore, be operated directly.
Any admissibly high mechanical stress of the protective cap that
might impair the explosion protection shall be avoided.
The data according to sections 3 and 4 shall be taken into account
during use.
Applications other than those described are not permissible without
a written declaration of consent from Messrs. COOPER CROUSE-
HINDS / CEAG.
During operation the instructions stated in section 7 of the operating
instructions shall be observed.
The sole responsibility with respect to the suitability and proper use
of the control switches with regard to the basic requirements of
these instructions (see technical data) lies with the operator.
6 Installation
The relevant national regulations(e.g. Betr.Si.V, the equipment safety law
for Germany) and the generally recognized rules of engineering apply for
the installation and operation (IEC/EN 600079-14).
The improper installation and operation of control switches may
result in the invalidation of the guarantee.
6.1 Mounting / Dismantling
Components for panel mounting are mounted in accordance with Figs. 1
– 4, page13 and according to the following:
1
. The operating and indicating element, item 4, is inserted from the
front into the bore hole ( Ø 30.3 mm) of the switch panel or enclosure,
maximum wall thickness 5 mm.
Here special attention shall be paid to the correct fit of the seal, item
5, and of the element (positioning lug on element shall fit into the
recess, see dimensions drawing on page 12.)
2
. Tighten the counter-nut, item 3, using the mounting tool, item 12
(Accessory Order No. GHG4101914R0001).
Excessive tightening can result in damage to the actuator elements.
3.
The Ex-d components, item 1, can be completed by adding a
protective cap, item 7, an optional item – see section 5 –to form fully
certified built-in apparatus.
The minimum distances of the operating elements have to be
observed (see Dimension drawing page).
The partially certified built-in components can be retrofitted with the
protective cap Pos. 7, optionally as described under point 5, can be
completed to fully certified built-in devices.
To do this, the contact protection of the terminals must first be removed.
The protective cap is mounted as follows:
4.
Remove the pressure screw with seal, item 8, from the protective
cap, item 7, and adapt the sealing rings to suit the cable cross
section.
5.
Push the cable, item 9, through the pressure screw with cable seal,
item 8, of the seal, item 6, and the protective cap, item 7.
6.
Connect the cable. Fix the strain-relief, item 1, with the screws, item
11, to the cable and engage in the guide grooves, items 15a and 15b,
of the component, item 1 (see Fig. 3).
Explosion-protected control units GHG 418
GB
