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ISOLATORS-EX[GD] Series
4. Mains Electrical features
(see table 3)
4.1 Switch Contacts
Switching Chamber
Switching Chamber Level
Level
1
2
Table 4
[*] Technor ZBWE suitable only for ambient temperature from -20°C to +60°C.
Cortem M-053x suitable only for ambient temperature from -40°C to +60°C.
4.2 Cross Sectional Areas Conductors & Torque
Terminals Contacts - Torque
Type COMMAND-EX (In)
Cross Sectional Areas Conductors
10mm² finely-stranded
32A
25 mm² finely-stranded
63A
10mm² finely-stranded
Earth Terminal - 32A (*)
WPE 10
35mm² finely-stranded
Earth Terminal - 63A (*)
WPE 35
Table 5
For stainless steel enclosure up to 40A, is advisable to dismount the switch body from the bottom
plate in order to wiring the switch contacts. When the switch is wired, take and put-back in place
inside the enclosure and be sure that all screws are tightened as table 4, and check carefully the
screws to fix the switch on the bottom plate.
4.3. Cable Entries
Rated
Poles
Cable Entries
Current
2
20 A
2xM25x1,5mm
3/4
2
25 A
2xM25x1,5mm
3/4
2
2xM25x1,5mm
32 A
3/4
2xM32x1,5mm
2
2xM32x1,5mm
40 A
3/4
2xM40x1,5mm
2
2xM40x1,5mm
63 A
3/4
2xM50x1,5mm
3/4
2xM50x1,5mm
Table 6
(*) Optional on request.
For stainless steel enclosures cable entries are not threaded.
4.4. Auxiliary contacts
They are optional accessories with ATEX/IECEx/EAC Ex separate certificates. Installation and maintenance shall
be done as prescribed by manufacturer documents. Creepage and clearance distances shall comply with IEC/EN
60079-7 / ГОСТ Р МЭК 60079-7-2012 at Table 1, current and maximum dissipated power shall not exceed
the maximum value allowed.
4.5. How to install Auxiliary Contact – Late-Make & Early-Break
See Figure 4
4.5.1 Electrical Parameters - Auxiliary Contact
The parameters relating to the safety, available only for ATEX certification, is not possible to mount auxiliary contacts
for IECEx certification.
For Russian Market the auxiliary contacts must be certified EAC Ex.
4.5.2 ATEX Certification – Auxiliary Contact
Type
V max - I max
protection
EX-TECH SOLUTION
ZBWE-....
415V – 4A
Ex db eb IIC Gb
CORTEM
M-053x
400V – 4A
Table 7
4.5.3 IECEx Certification – Auxiliary Contact
Tipo
V max - I max
protection
CORTEM
M-053x
400V – 4A
EX-TECH SOLUTION
ZBWE-....
415V – 4A
Ex db eb IIC Gb
Table 8
MP39682
Auxiliary contacts [*]
Main Contacts
2
4
Tightening Torque - (Nm)
16mm² single-wire
35 mm² single-wire
16mm² single-wire
35mm² single-wire
Auxiliary
Breather/Drain
Entries (*)
Valve (*)
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
M20x1,5mm
Mode of
ATEX
Certificate
INERIS 02 ATEX 9007U
Ex d e IIC
CESI 09 ATEX 016 U
Mode of
IECEx
Certificate
Ex d e IIC
IECEx CES 11.0031U
IECEx INE 13.0063U
5. Installation
Installation shall be carried out by suitably-trained personnel in accordance with the
applicable code of practice (e.g. IEC EN 60079-14) and the provisions of the national safety
and accident prevention regulations and this instruction manual.
5.1 Safety Instructions
Use the switch only for its intended purpose. Incorrect or impermissible use or noncompliance with these
0
instructions invalidates our warranty provision. No changes to the switch impairing its explosion protection are
1
permitted. Fit and operate the switch only if it is clean and undamaged.
2
The contact element must be replaced after each short-circuit in the switch main circuit.
This is because the device is hermetically sealed and the state of the switching contacts
0
cannot be checked. Any damage can invalidate the Ex protection.
1
5.2 Accessories
2
• Auxiliary Contacts type see topic 3.1.
• Mounting bracket for DIN-GUIDE.
• Isolated Earth Plated.
• Earth-Stud only for GRP enclosure.
• Breather/Drain valve.
Earth Stud and L Earth Plate only for metal cable gland.
Only approved and genuine SCAME accessories must be used.
5.3 Terminal fitting
0,8
All wiring must be carried out in accordance with the code of practice and installation standards in hazardous
areas like IEC EN 60079-14. Use the correct size of tool and torque (see manufacturer documents) for
tightening the terminal clamps (screwdriver or spanner). Creepage and clearance distances shall comply
2,5
with IEC/EN 60079-7 / ГОСТ Р МЭК 60079-7-2012 (table 1), electrical parameters shall not exceed the
maximum allowed.
2,4
Note: Minimum creepage and clearance distances that shall be maintained to conductive parts or other live
parts are those of Material group I (CTI = 600):
5
250 V
400 V
500 V
630 V
Table 9
Note: Voltages are nominal voltages – the working voltage may exceed by 10% the voltage level given.
5.4 Earth-Stud Terminals
The external terminal earth provide effective connection of conductor with a cross-sectional area of at least
4mm² and is located in the following place : See Figure 5 - Stainless Steel – Aluminium - GRP
ISOLATORS-EX[GD]shall be subject to a routine dielectric streght test of 1000 V + 2U rms or
1500 V rms, whichever is the greater applied for a period of 60 s as required by clause 6.1 of
IEC EN 60079-7 / ГОСТ Р МЭК 60079-7-2012. Alternatively, a test shall be carried out at 1.2
times the test voltage, but maintained for at least 100 ms.
5.5 Cable Glands
Use only Ex e and/or Ex t IIIC approved glands (as relevant). Certified cable glands can only be fitted with a
suitable IP rating commensurate with IP rating of the enclosure.
Ensure that all the cable-glands used, shall be suitable for the cable in order to prevent self-loosening and
ensure permanent sealing to avoid moisture ingress.
Refer to the instructions of cable glands manufacturer.
For Russian Market the cable glands, blanking plug, enlarger and reducer must be certified EAC Ex.
5.5.1 Blanking Plugs
Any unused entries must be blanked using a suitably approved blanking plugs with separate certificate.
5.6 Drain / Breathing valves
Drain/breathing valves have ATEX / IECEx / EAC Ex separate certificate. Installation and maintenance shall be
done as prescribed by manufacturer documents. Can be use only Drain/Breathing valves supplied by SCAME.
6. Servicing and maintenance and repairing
Inspection and maintenance of this equipment shall be carried out by suitably trained
personnel in accordance with the applicable code of practice (e.g. EN 60079-17 and EN
60079-14). Repair of this equipment shall be carried out by suitably trained personnel in
accordance with the applicable code of practice (e.g. EN 60079-19). During servicing, it is
particularly important to check those components upon which the type of protection depends.
6.1 Routine Maintenance
Routine maintenance is required in order to guarantee the efficiency of the enclosure and to maintain the
required level of protection.
1) Check that the lid seal is in place and not damaged each time the enclosure is opened
Ambient
2) Check that all the lid fixing screws are in place and secured each time the enclosure is closed
Temperature
3) Check that the mounting screws/bolts are tight and free of corrosion annually
4) Check the security of all cable glands annually
5) Check the enclosure for damage annually
-50°C / +75°C
6) In zones with presence of combustible dusts it is necessary to periodically clean the upper surface of the
box, limiting the depth of the layer to less than 5 mm.
Storage conditions
- 40°C / +60°C
Storage Temperature : from -50°C to +70°C for products with minimum ambient temperature -50°C.
Storage Temperature : from -20°C to +70°C for products with minimum ambient temperature -20°C.
Relative Humidity : ≤95%RH
Storage time 20 years.
Ambient
The estimated product lifetime is 10 years if maintenance and storage condition are respected and all
Temperature
prescriptions specified applied in this instructions .
6.2 Resistance to chemical agent
Consideration should be given to the environment in which these enclosures are to be used to determine the
- 40°C / +60°C
suitability of these materials to withstand any corrosive agents that may be present.
6.3 Disposal
-50°C / +75°C
Disposal and recycling of the product shall be done according to national regulations for waste disposal and
recycling.
6
Minimum creepage
5 mm
8 mm
10 mm
12 mm
Minimum clearance
250 V
5 mm
400 V
6 mm
500 V
8 mm
630 V
10 mm
ZP90903-4
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