EXPO MiniPurge D758-ES, Руководство пользователя

Страница: 33 / 39

ML358 v9 13-Nov-19
MiniPurge Interface Unit MIU/e
User Instruction Manual
Manufacturer: Expo Technologies Ltd , Unit 2 The Summit, Sunbury on Thames. UK.
Model Type & Rating:
Certificates:
Hazardous Area Marking
Code:
APPLICATION SUITABILITY
The MiniPurge Interface Units – MIU/e are certified for use in Hazardous Areas where the Hazardous Area is non-mining (i.e.
above ground) and the hazard is caused by flammable gasses or vapours.
The systems may be used in ATEX/IECEx Gas Zones 1 & 2, Gas Groups IIA, IIB & IIC and in Dust Zones 21 & 22, Dust Groups
IIIA, IIIB & IIIC.
The following materials are used in the construction of MIU/e: Stainless Steel, Steel, Brass, Copper, Polyamide, Silicone. If
substances that will adversely affect any of these materials are present in the surrounding environment, please consult Expo
Technologies for further guidance. This equipment is designed for use under normal industrial conditions of ambient
temperature, humidity and vibration. Please consult Expo Technologies before installing this equipment in conditions that may
cause stresses beyond normal industrial conditions.
WARNING - Only install, commission, inspect, maintain or fault find when safe to do so.
INSTALLATION
The MIU/e shall be installed in accordance with relevant standards, such as IEC 60079-14 and any local codes of practice that
are in force.
The MIU/e shall be connected to the Purge and Pressurization system in accordance with the instructions given in the handbook
supplied with the pressurization system.
The external earth connection of the MIU/e shall be connected to earth using minimum 4mm
2
conductor.
SELECTION OF CABLE, CABLE GLANDS AND CONDUCTORS IN CONDUIT
Cable glands or other cable entry devices shall be appropriately certified and suitable for the cable and the conditions of use
and be installed in accordance with the manufacturer’s instructions.
When the MIU/e application requires the hazardous area marking code:
Ex eb IIC T5 Gb, Tamb -20°C to +55°C there is no further guidance for the selection of cable and cable glands or conductors in
conduit.
When the MIU/e application requires the hazardous area marking code:
Ex eb IIC T4 Gb, Tamb -20°C to +60°C the user shall select cable and cable glands or conductors in conduit that have a higher
temperature rating than 83.2°C.
TERMINALS
MIU/e may be fitted with a combination of:
WDU2.5 terminals certified to DEMKO 14 ATEX 1338U & IECEx ULD 14.0005U.
SAK2.5 terminals certified to KEMA 97 ATEX 1798U & IECEx KEM06.0014U.
WPE2.5 Earth terminals certified to DEMKO 14 ATEX 1338U & IECEx ULD 14.0005U.
For all type of terminals: Tightening torque range: 0.4 to 0.8 Nm (WDU & WPE) & 0.4 to 0.6 Nm (SAK).
Conductor cross section maximum 2.5 mm
2
, minimum 1.5 mm
2
.
Type of connection is screwed - Solid copper conductors to be used.
Stripping length shall be 10 mm.
Only one conductor is allowed at each side of a terminal. Multiple conductors shall be crimped
together before screwed into the terminal.
Maximum number of terminals: For Model MIU/e1 – Up to 18 current carrying terminals.
For Model MIU/e2 – Up to 33 current carrying terminals.
For Model MIU/e1/MO – Up to 13 current carrying terminals.
COMMISSIONING
The installation of the cable glands, electrical and earth connections shall be inspected for correct installation before the unit is
put into service. The lid shall be correctly fitted.
MAINTENANCE
The condition of enclosure and associated cable glands shall be inspected for damage every six months. The terminals shall be
inspected for tightness and gaskets inspected for damage.
FAULT FINDING
When wiring or signal fault occurs, check each terminated wire, terminals for tightness and gaskets for damage.
External faults such as broken switches within the Control Unit may also require investigation.
MIU/e1 MIU/e2 MIU/e1/MO
400V / 7A 400V / 7A 400 V / 2A
IECEx EXV 19.0057X ExVeritas 19 ATEX 0542X TUV 12.1463
Ex eb IIC T5 Gb
Ex tb IIIC T100°C Db
Tamb -20°C to +55°C
II 2 G
Ex eb IIC T5 Gb
II 2 D
Ex tb IIIC T100°C Db
Tamb -20°C to +55°C
Ex e IIC T5 Gb
Ex tb IIIC T100º Db IP66
Tamb -20°C to +55°C
Ex eb IIC T4 Gb
Tamb -20ºC to +60ºC
II 2 G
Ex eb IIC T4 Gb
Tamb -20°C to +60°C
Ex e IIC T4 Gb
Tamb -20ºC to +60ºC