3
ZP90801-2
MP36450
ENGLISH
THIS DOCUMENT MUST BE READ CAREFULLY BEFORE INSTALLATION
These instructions are intended for:
expert electricians or appropriately trained personnel.
1. Safety information
The plugs of the OPTIMA-EX series are used for fixed installations in environments with a potential
risk of explosion identified as Zone 22.
These instructions for installation, use and maintenance must be kept in a safe location for future
reference. During operation or maintenance work on the apparatus, do not leave this manual or
other objects inside the enclosure.
Use the OPTIMA-EX series plugs for their approved use only, and keep them completely intact and
clean.
The plugs have been designed to withstand shocks of 4 J and to be used under normal vibration
conditions. They have not been designed for use in environments subject to extreme vibrations.
The type of protection cannot be guaranteed if the product is installed incorrectly.
Use only original spare parts supplied by SCAME.
No modification/work is permitted on the plugs unless specifically indicated in this manual.
DO NOT OPEN THE ENERGISED ENCLOSURE IN PRESENCE OF AN EXPLOSIVE
ATMOSPHERE
Always follow the national safety rules and the safety instructions contained in this manual
whenever working on the plug.
2. Compliance with standards
The plugs of the OPTIMA-EX series are intended for use in:
Zone 22. (EN 60079-0:2012+A11:2013, EN 60079-31:2014).
3. Technical data and codes
3.1 Type of Ex-protection
: II 3D Ex tc IIIC T90°C Dc IP66
Ta -25/+60°C
Year XXXX
: Year of manufacture.
Product suited for use in an explosive atmosphere.
II
: Product classified as belonging to group II, installable in environments not in mines.
3D
: Product classified as belonging to category 3 for areas containing dust (D). The product can
be installed in Zone 22.
Ex tc
: Product classified as type tc according to standard EN 60079-31 and intended for areas with
a potentially explosive atmosphere due to the presence of combustible dust.
IIIC
: Equipment classified as group IIIC, product suited to be used in presence of conductive dust.
T90°C
: Maximum surface temperature.
Dc
: EPL for combustible dust.
Ta -25/+60°C
: Allowed room temperature range, present at the installation site.
3.2 Special conditions of use (see instruction sheet)
Low mechanical risk 4J.
3.3 Degree of protection of the plug IP66
3.4 Power supply terminal: connecting cables and tightening torques
Terminal section: see table 1.
4. Installation
Installation must be carried out by suitably trained personnel in compliance with applicable
laws.
Comply with the rules of generally accepted engineering practice for the installation of electrical
material in places with presence of combustible dust (EN 60079-14), national safety rules and the
safety instructions contained in this manual whenever working on the unit. These operations must
be carried out by suitably trained and expert personnel.
4.1 Instructions for safe use
The IP degree of protection of the plug must be kept in compliance with the requirements of the
environment in which it will be installed by using suitable cable glands and gaskets and by complete
compliance with the installation standards.
Store the plug in the warehouse inside its original packaging to protect it from dust and humidity:
the plug must be removed from the package just before installation.
The plug must be installed intact and free of any damage.
Instructions for correct installation of the plug:
1) Read the Instructions for installation, use and maintenance regarding the interlocked socket.
2) Remove the plug from the package and check that it has not been damaged during transport.
3) Check that the components are clean and free of defects.
4) Pull out the insert from handle.
5) Insert the cable into the handle.
6) Wiring operations.
Before closing the plug:
7) Check that all foreign materials have been removed from inside the plug: do not leave these
instructions inside.
8) Check that the gaskets are intact and installed properly.
9) Close the cover by tightening the screws appropriately or “snap-on” coupling device in order
to guarantee the IP degree of protection.
10) Torque the cable gland / cable clamp to guarantee the correct IP degree.
11) Torque the cable gland / cable clamp screw (where provided) of an appropriate force to prevent
an accidental unscrewing.
12) Store these instructions in a safe location for future reference.
4.2 Inserting the cables
Insert the cables into the plug, providing the individual conductors with suitable length.
WARNING: The cable entry point may reach 85°C for product 32A; 95°C for product 63A;
90°C for product 125A. Suitable precaution should be taken when selecting the cable.
4.3 Wiring of the terminals
The wiring must be carried out up to standard.
Use only properly sized equipment to perform the wiring.
Each terminal can host a single conductor.
The electrical cables must have insulation suited for the voltage.
Unused terminals must be tightened completely.
5. Use, maintenance and repair
Inspection and maintenance of this plug must be carried out by suitably trained personnel
in compliance with the standards (e.g., EN 60079-17). During routine maintenance, always
check the components responsible for the degree of protection.
All repairs of this apparatus must be carried out by suitably trained personnel in compliance with
the standards.
5.1 Interlocked sockets to be used
Use only ATEX certified sockets suitable for use in Zone 22 (D) with degree of protection IP66.
5.2 Plugs ring nut
When unplugged the cover ring nut must be screwed off to the socket body bottom.
When plug inserted the plug ring nut must be screwed off on the socket body bottom.
5.3 Interlocked sockets ring nut
When unplugged the cover ring nut must be screwed off to the socket body bottom.
5.4 Routine maintenance
Routine maintenance is necessary in order to guarantee proper operation and preservation of the
plug’s degree of protection.
1) Check that the gasket is intact each time the enclosure is opened.
2) Check that the closing screws or “snap-on” coupling device are all in position and well-
tightened each time the enclosure is closed.
3) Check the seal of the cable glands every year.
4) Check for any damage to the enclosure every year.
5) Check that the screw terminals are tightened as indicated by the manufacturer.
6) In environments with the presence of combustible dust, the surface of the enclosure’s top wall
must be cleaned periodically, preventing the deposited dust from reaching a thickness of more
than 5 mm.
5.5 Chemical aggression
The plugs of the OPTIMA-EX series are made using:
- thermoplastic alloy (PC-XILOXANE) for the handle, the plug insert, cover ring nut and cable gland;
- thermoplastic rubber SEBS H.T. for the knob gasket;
- EPDM rubber for the plug gasket;
- silicon rubber for the handle gasket.
The environment in which the interlocked sockets will be installed must be considered carefully in
order to determine the sustainability of these materials in the presence of chemical agents or
corrosive atmospheres.
5.6 Disposal
The product must be disposed of in compliance with national rules on the disposal and recycling
of industrial waste.
24V OPTIMA-EX Series