Cable terminal

Explosion-proof enclosures are characterized by strong metal enclosures with special close-fitting access covers and breathers that contain an ignition to the inside of the enclosure. Field wiring in the hazardous environment is enclosed in a metal conduit of the mineral-insulated-cable type. All conduit and cable connections or cable terminations are threaded and explosion-proof. Conduit seals are put into the conduit or cable system at locations defined by the National Electric Code (Article 501) to prevent gas and vapor leakage and to prevent flames from passing from one part of the conduit system to the other. 

Immobilization of one of the phases during operation by the melting of a faulty joint such as poor cable termination... 

Rectifier housing with glass fiber-reinforced base, housing connection box, meter table, corrosion protection rectifier 10 A/20 V, terminal strips, cable terminal and wiring, completely installed DM 8500... 

All cable terminations in Division 1 areas must be sealed. This requirement is imposed by API RP 14F, when specific cables are allowed in Division 1 areas. 

Cable termination fittings are available which also are approved as sealing fittings, and often incorporate a union in their design. Particularly for space-limited installations, the difference in length requirements for such dual-purpose devices, as compared to standard sealing fitting/cable terminator/union combinations, can be consequential. 

Pressure is at normal atmospheric in the stator compartment, and so there is no particular load on the cable terminal box. However, it is specified on the assumption that it may have to withstand the system pressure and the discharge pressure of the pump and provide sealing in relation to the outside environment. This is a safety precaution to prevent any escape of fluid from the motor in the event of damage to the can, e g. in the form of corrosion or abrasion. In most applications, high-pressure canned-motor... 

Figure 6.55 High power high voltage cage induction motor with cable termination system according to Fig. 6.54 with single core cables.

Marking II 2G/2D EEx ed IIC T6 Type of protection EEx ed IICT6 Certificate LCIE 99 ATEX 6027X Cable termination compartment in increased safety - e... 

Standards do not ask for a defined way of marking. If a colour is used, however, it shall be light blue. This is the marking used for the most part in practice light blue coloured cables, terminals, markings of connections of apparatus etc. 

Figure 6.235 Schematic circuit diagram of an intrinsically safe fieldbus with power supply, field devices and cable termination (J).

Different testing circuits have been put into practice (Fig. 6.236) to investigate the spark ignition characteristic of a fieldbus power supply with and without a cable and/or cable termination. 

Figure 6.236 Different test circuits for the investigation of the ignitability of a field-bus power supply with and without cable and cable termination.

Eield junction box drawings can range in complexity from a simple cable termination box or cabinet, to a local control station containing electrical/pneumatic equipment. Complex junction boxes may require information similar to that described above for instrument panels (e.g., specifications, drawings, test certificates), depending on the level of complexity involved. 

Junction boxes used for cable termination/routing require the following drawing details ... 

Installing SCSI devices is rather complex, but you still follow the same basic steps as mentioned with the other types of drives (refer back to the previous types of hard disk interfaces if you re still unclear). The main issues with installing SCSI devices are cabling, termination, and addressing. 

Figure 12.18. Probe head based on a cube about 5 cm on a side and incorporating filters, beamsplitter, and focusing optics. The probe is designed to accept standard fiber-optic cables terminated with. SMA connectors. Designed by DLT, Inc. (23) and used to acquire Figure 12.14C.

Another process is called electro-linking, where two boreholes are drilled close to each other. An electric cable terminating in an electrode is lowered in each hole. A potential of 2,000 volts is passed through the coal. 

Separation provided between the busbars and cable terminals. 

Full details of all cable termination, gland plates and boxes. 

Application of a three-phase short circuit to the terminals of an unloaded induction motor is not a practical factory test, especially for a large high-voltage motor, because the motor can only be excited at its stator windings from the power supply. A three-phase short circuit at or near the stator terminals can occur in practice e.g. damaged supply cable, damage in the cable terminal box. The parameters of the stator and rotor windings can be obtained from other factory tests. However, the derived reactance can be defined in the same manner as those for the synchronous machine, but with... 

MV oveihead lines Poles (including traverse, insulators,...) Phase conductors Line trace - Pole-mounted switches - Cable terminations - Pole-mounted MV/LV substations... 

Mineral insulated cables terminated into accessories with approved flameproof glands. These have a longer gland thread than normal MICC glands of the type shown in Fig. 3.39. Where the cable is laid underground, it must be protected by a PVC sheath and laid at a depth of not less than 500mm. 

PVC armoured cables terminated into accessories with approved flameproof glands or any other wiring system which is approved by the British Standard. All certified flameproof enclosures will be marked Ex, indicating that they are suitable for potentially explosive situations, or EEx, where equipment is certified to the harmonized European Standard. All the equipment used in a flameproof installation must camy the appropriate markings, as shown in Fig. 3.72, if the integrity of the wiring system is to be maintained. 

This study is concerned with the application of heat-shrinkable plastics tubing and mouldings as terminations for medium-and high-voltage power cables in replacement of traditional cable termination systems. The first installations were at low voltages (240-440 V) in weather-protected... 

This study is particularly concerned with the application of heat-shrinkable plastics materials to power-cable terminations. Some of the principle types of cable involved are briefly described below. 

Raychem commenced their development of power-cable termination systems about 1961. The first applications were in MV, weather-protected situations, and were soon extended to outdoor MV applications. 

It will be clear from the above account that this development for a range or products for high-voltage power cable termination was especially demanding technically. There was, however, another feature of the development which is a little less obvious. It was that, when the development started, Raychem had no reputation in the electrical supply industry. These were not products which could be tested in the field in any casual manner, because the consequences of failure due to unforeseen faults in the product would be quite disastrous. How then, were Raychem to persuade their potential customers that these new products would be superior to the old-fashioned methods that had been in use for many years ... 

Power Cable Terminations, 305-35 accelerated ageing, 329 adhesive, 334... 

The studies have been ordered into a number of technological groups, each of which is preceded by a chapter on the relevant polymer science and technology these are the PST chapters. Many of the original studies contained such a section but to have retained them intact would have entailed undue repetition. Their assembly into separate chapters in the present work form a collection of articles on topics in polymer science and technology which it is hoped will prove useful as a sub-theme to the case-study material. In a few cases polymer science aspects have been left in their original contexts because they seemed particularly relevant or were intimately bound up with the product development. Examples are found in the chapter on Heat Shrinkable Power Cable Termination where the technology of these materials is special to the study, and the Acitainer... 

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