general SQ and SQ... interlocked switched socket-outlets for industrial purposes General characteristics Mechanical features - Mechanical resistance This chapter illustrates the technical characteristics of SQ interlocked socket-outlets Verified with the provisions of Clause 24 of standard EN 60309-1 (IEC 60309-1) available in horizontal (SQ), vertical (SQE, SQV and SQA with circuit breaker) and SQT - Resistance to chemical agents configuration (with toroid safety transformer). See table on page 8 These socket-outlets offer tested reliability and can be used, along with PLUSO plugs and FM and FC enclosures for industrial use, as modular solutions to configure dis- - Degree of protection tribution boards for industrial socket-outlets. ILME socket-outlets are designed to be IP44 and IP55, in accordance with EN 60529 (see information note on page 7) used for: - Resistance to glow-fire - Industrial applications Compliant with IEC 60695 -1 -2: 850 C for enclosures 960 C for inserts - Services applications (commercial, exhibitions, etc.) - Temperature - Agricultural and livestock breeding applications ambient: -25 C - +40 C limit of materials: -40 C - +125 C - Residential and similar applications (i.e. common areas of condominiums, cellars, - Self-extinguishing capacity garages, community buildings, kitchens, etc.) UL 94 classification: V2 for enclosures and inserts Socket-outlets are supplied in models for board-mounting and without base box - ILME ZG 32 switches-disconnectors (optional). All models have a compact modular design that enables them to be (on SQ and SQE socket-outlets) and ILME ZF 32 switches-disconnectors with installed in the following four types of installations: 10x38 fuses (on SQV socket-outlets). Compliant with EN 60947-3, AC-22A category - In FM and FC enclosures for distribution boards of use. - On machinery with a suitable fixing window - On walls by means of the optional single box - Magnetothermal circuit breakers, curve C, compliant with EN 60898-1 - Flush-mounted by means of the optional single box Siemens series 5SX2 (IMQ, VDE certification, etc.- on SQA socket-outlets) The following types of socket-outlets are available: Materials Horizontal 15 x 115 mm socket-outlets - Enclosures and inserts in insulting thermoplastic material 1) - SQ types with interlock and without fuse carrier , IP44 - Anti-aging elastomer gaskets - Self-centring holes in brass with galvanised steel pressure spring Vertical 231 x 89 mm socket outlets - Zinc-plated fixing screws 1) - SQE and SQE.5 types with interlock and without fuse carrier , IP44 and IP55 - Terminals with zinc-plated screws retained in their seats when unscrewed 2) - SQV and SQV.5 with interlock and fuse carrier , IP44 and IP55 - 32A socket-outlets with two fixing screws on terminals provided as protection 3) - SQA and SQA.5 types with interlock and magnetothermal circuit breaker against accidental loosening (Siemens), IP44 and IP55 4) - SQT 16220 types with safety transformer IP44 and IP55 The package The socket-outlets are supplied with: - Oil-proof and anti-aging gaskets Electrical Features - Self-threading fixing screws for flush-mounting Rated frequency: The following may be supplied on request: 0 Hz (direct current), and from 50 Hz to 500 Hz - Single box for wall- or flush-mounting, with cable gland, gaskets, lock nuts, sealing plugs and self-threading screws Rated operating voltage: - Rubber frame for flush-mounting on boxes (SQC 923 CS) of SQE, SQV, SQA and the standard identifies two main types of use: SQT socket-outlets - Extra-low voltage socket-outlets (and related plugs), (SELV safety requirements, in - ILME enclosures for FC and FM distribution boards accordance with CEI 64-8 installation standard), for max. rms voltage values of 50V - Low voltage socket-outlets (and plugs) for rms voltage values above 50V and up to a maximum of 690V Polarity: models are designed with: - 2 poles (for extra-low voltage, 2P) - 3, 4 e 5 poles (low voltage, 2P+m, 3P+m, 3P+N+m) Rated current: 16A (extra-low voltage) 16A, 32A (low voltage) Rated insulating voltage: - 690V for low voltage interlocked socket-outlets (types SQ, SQE) - 500V for interlocked socket-outlets (SQV types), limited by the fuse cartridge installed - 440V for low voltage socket-outlets with magnetothermal circuit breaker (SQA types), limited by the latter - 50V for extra-low voltage (SQT 16220 type), limited by extra-low voltage socket- outlets and safety transformer Minimum surface insulation distance: 10 mm (EN 60309-1) Minimum air insulation distance: 8 mm (for rated operating voltages higher than 500V) 1) The switchgear linked to the interlock is a series Z switch-disconnector (ZG 32) 2) The switchgear linked to the interlock is an ILME switch-disconnector with Z fuses, code ZF 32, for industrial fuses (not supplied) sized 10x38, in accordance with EN 60269-3-1, type gG, up to 25A. 3) The switchgear linked to the interlock is a magnetothermal Siemens circuit breaker, series 5SX2, compliant with standard EN 60898-1. 4) The 24V output is interlocked by means of a microswitch that disconnects the primary circuit of the transformer if the plug is not inserted. The safety trans- former is automatically protected by a self-resetting device and must be used to supply Class III portable lamps only. Breaking capacity: Socket-outlets have mechanical interlocks that prevent the plug being removed while voltage is present or from being inserted when the socket-outlet is live. This explains why no breaking capacity is required. The socket-outlets parts (inserts and holes) are the same as those of the PLUSO series and have therefore a breaking power 1.25 times the rated current and 1.1 times the rated operating voltage. 131SQ and SQ... interlocked switched socket-outlets Selecting socket-outlets Socket-outlets should be selecting taking into account the following parameters: Rated frequency of the device to supply with the plug and socket-outlet coupling Rated supply voltage and type of distribution (single or three-phase, with or without neutral) to determine the number of poles and hour position. The 1 hour position is available for all 50V voltages and voltage ranges > and for frequencies and frequency ranges not covered by standards. Site of installation for the determination of the protection class (IP44 or IP55) and voltage (in some areas installation standards require an extra-low safety voltage). SQ and SQ... socket-outlets have an IP44 and IP55 protection class. Socket-outlets with IP55 class of protection have a bayonet fastening cover, traditionally defined as water-tight, and must be used with with IP67 plugs (with locking ring and gasket) to guarantee a high protection of the connected equipment (IP55). All equipment must be installed following state-of-the-art procedures and in compliance with the manufacturers assembly instructions. If components with varying classes of protections are installed, the protection class of the resulting distribution board corresponds to that of the unit with the lowest class of protection. This has been assessed and applies: - To socket-outlets when a plug with equivalent class is inserted or the cover is closed - To enclosures, when all covers are closed ILME accessories for SQ and SQ.. socket-outlets ILME offers the following range of socket-outlets and plugs for SQ and SQ socket-outlets: - Simple socket-outlets for industrial use in two versions with IP44 and IP67 protection class (PE and PEW types) - Enclosures for distribution boards for groups with IP55 protection class (FM and FC types) - Simple enclosures for the individual assembly of socket-outlets with IP55 protection class (SQC 1114 CS and SQC 923 CS types) All enclosures and socket-outlets cover the installation requirements specified in standard CEI 64-8 (series Cenelec HD 384, IEC 60364). Type of installation The structure of SQ and SQ... socket-outlets is designed to allow them to be mounted in four different configurations as illustrated below: - In FM and FC enclosures (Figure 1) - On equipment or pre-assembled enclosures (Figure 2) - In boxes for wall-mounting (Figure 3) - In boxes for flush-mounting (Figure 4) (Figure 1) (Figure 2) (Figure 3) (Figure 4) *) Protection against indirect contact through complete insulation Article 7.4 of standard EN 60439-1 (class. 17-13/1) defines the protection measures against electric shocks that have to be incorporated in the boards. Protection against indi- rect contacts can be guaranteed only by completely insulating the installation b (Art.7.4.3.2.2), which implies complying with the following: a) Units should be completely enclosed in insulated material. Enclosures should be marked with the b symbol, which must always been visible from the outside. b) Enclosures must be made in insulating material suitable to withstand the mechanical, electric and thermal stresses to which they may be exposed during ordinary or extra- ordinary operating conditions and must be age-proof and flame resistant. c) Enclosures should have no conducting parts to prevent fault voltages from being transmitted outside the unit. d) Enclosures should have at least an IP3XD class of protection e) Exposed conductive parts inside the unit should not be connected to the protective earth conductor.These parts must always be connected to a protection system that implies the use of a protective conductor. This also applies to built-in units, even if they have a connection terminal for the protective earth circuit. f) If doors and covers of the enclosure can be opened without wrenches or other tools, it is necessary to install a safety barrier in insulating material to guarantee the neces- sary protection against accidental contacts not only with life accessible parts, but also with components that become accessible only after the removal of the covers. The barrier must be removable with the use of a tool only. The metal screws used for the assembly of socket-outlets of enclosures for FM and FC distribution boards are not connected with the interior of the board. If the units are wall- mounted using the blanking plugs supplied and in accordance with the above provisions, the assembled equipment will provide protection against indirect contacts. *) According to sub-clause 413.2.1.1 of standard IEC 60364-4-41, it is equal to that of equipment of class II, see standard IEC 60536. 132 general