Itc32

1. SCOPE This instruction addresses the particular requirements of installation systems for electrical equipment of cranes, lifting equipment, transport and other similar equipment such as escalators, conveyors, bridges trailers, winches, scaffolds, electrical, etc.. 2. GENERAL REQUIREMENTS. The whole installation can be put out of service by a general pole switch manual control, located on the main circuit. This switch must be located in readily accessible from the ground, in the same room or enclosure where electrical equipment is located and operated and are readily identifiable by a label indeleble.Las pipeline spanning from the general protection device to the computer electric lift or drive shall be designed so that engine starting does not cause a voltage drop exceeding 5%. Only in the case of machinery intended for the carriage of goods do not have cages for transport, switches allow the installation of suspended from the tip of the pipe conduits móvil.Las mobile command and signaling may be placed under the same protective envelope of the other mobile lines, even if they belong to different circuits, provided they meet the conditions established in the Instruction ITC-BT-20.En facilities abroad for mobile services using flexible cords coated polychloroprene or similar as per UNE or UNE 21.150.Los lifts 21,027, the structures of all motors, lifting equipment, combiners and metal roofs of all electrical devices inside the boxes or on them and in the hole, connect to grounded considered tierra.Se equipment mounted on metal structure elements of the building if the structure has been previously connected to ground and satisfies the following requirements: electrical continuity is assured, either by construction, either through proper connections, so they are protected against mechanical damage, chemical or electrochemical. its conductivity must be suitable for this use can only be cleared if compensatory measures are foreseen has been studied and adapted for this use The steel structure of the box supported by the lifting cables passing through metal pulleys or drums of hoisting machine shall be considered grounded to provide a security condition in the electrical connections between them and earth. If this is not fulfilled will install a special driver protection.The runways of all crane workshop will be attached to a local protection.The driver, pens, etc.. in which the equipment is installed electric drive, must be accessible only to qualified persons. When its dimensions allow it to penetrate, adequate provision for facilities in the affected local electric service as set out in the ITC-BT-30. These sites will place a wiring diagram of the installation. 3. SEGURIDAD.3.1 TO ENSURE PROTECTION. Protection against direct contact in the collecting system and set of slip rings, cables and bus bars, and assemblies of the runways must be

locked or removed, so that anyone with access to relevant areas of the facility, for example, the corridors of the sliding guides or aisles portagrúa beam, including points of access, must protect against direct contact with the live parts, in accordance with paragraph 2 of the ITC-BT-24.In areas where access is only supported by specially trained persons should be protected by placing out of reach for removal, in case of cables or bus bars, in accordance with paragraph 2.4 of the ITC-BT-24 . In this case, the volume limit accessibility to the surface less susceptible of occupation by people, ending superficie.La the limits of that protection by placing out of reach is designed only to prevent accidental contact with live parts. The cables and busbars must be arranged or protected so that even with an oscillating charge can not come into contact with the rigging to hoist or any control cable, chain drive, similar elements that are electrical conductors. 3.2. Overcurrent protection. The electrical equipment will be protected by one or more devices acting automatic protection in case of an overcurrent caused by overload or short circuit. This requirement does not apply to equipment designed to withstand current surges if mismos.El operation of overcurrent protective devices for mechanical brake actuators produce simultaneous disconnection of motion actuators correspondiente.Los protective devices including excessive temperature temperature-sensitive elements (eg temperature-dependent resistors or bimetallic contacts) and are mounted in or on the motor windings in combination with a contactor can not be regarded as sufficient protection against a short circuit current. 4. Section and cut. 4.1. Court for mechanical maintenance. The switches must be cut omnipolar and must have the means to prevent any tension commissioning of facilities so imprevista.En the supply side of the slip rings or bars must be installed a switch that allows isolation and disconnect all line conductors and the driver installation wiring neutro.Las cranes and lifting appliances and transport, must be equipped with an off switch that allows the wiring becomes disconnected during maintenance and reparación.Los switchgear assemblies should be able to be disconnected. This disconnect should include power circuits and Control.Load cutting means must be located in the vicinity of the joint aparamenta.Las active parts of switchgear assemblies that for reasons of safety or maintenance must remain in service after the opening, should be marked with a label indicating that they are protected with tension and no direct contact after intencionado.Si circuit disconnect switches pass through the rings or bus bars, they should be protected from direct contact with a degree of protection of at least IP2X.Puede dispensed with maintenance disconnect switches if the switches specified in emergency