Control, gear

A rotor fails during start-up, possibly due to a lower supply voltage than desired or a smaller accelerating torque than required or reasons leading to similar conditions. In such cases the rotor tails first, due to higher rotor currents and a prolonged acceleration time or a locked rotor. At this instant, unless the motor control gear trips, the stator may also fail due to excessive heat. Instances can be cited where even... [Pg.43]

Each electric motor and connected control gear is grounded separately at least two points. The ground resistance should be checked to ensure continuity of ground conductors. Refer to Chapter 21 for more details on grounding requirements. [Pg.235]

Automatic correction is always recommended to eliminate manual dependence and to achieve better accuracy. It also elimintites the risk of a leading power factor by a human error that may cause an excessive voltage at the motor and the control gear terminals. [Pg.765]

BS 5227, A.C. metal enclosed switchgear and control gear of rated voltage above 1 kV... [Pg.212]

A.C. metal enclosed switch gear and control gear between the voltages of 1 and 72.5 kV can be manufactured to three basic designs metal enclosed, metal clad and cubicle. [Pg.213]

The principal functions that have to be met by any type of motor control gear are ... [Pg.223]

In air conditioning circles, the tower normally represents the final heat sink in a turnkey package which would include compressors/condensers, pipework, ducting, fans, pumps, control gear, etc. Where consultants and experienced contractors are concerned, the tower specification is well defined and the purchases based upon economics related to efficiency. [Pg.528]

About three tons of control gear together with a (ton) block of titanium were projected upwards through several feet. Hundreds of square feet of glass and panelling were removed from the roof and walls of the building. The water jacket, made of i inch steel, was blown apart. [Pg.185]

Friction modifiers (1 or 2) 0.0-0.5% Controls gear shift feel and synchronizer friction durability... [Pg.341]

By the time the War Office was ready to take delivery, the development programme at Monkton Farleigh had been curtailed and it was decided to install only one of the two alternator sets in the first instance. Under-floor duct-work existed to take service pipes and cables for the second unit, should this ever be required, and the necessary control gear had been installed in the switch room a year earlier. The option to install the second unit was reviewed regularly and was not abandoned until 1946. [Pg.213]

Space was required not only to accommodate naval anti-aircraft stores, RDF equipment and Fire-Control gear previously kept at Bethel Quarry, but also Asdic equipment stored in requisitioned garage premises in Walcot Street and St John s Road in Bath, and at Batheaston slaughterhouse. The bombing of Bath on the nights of 25 and 26 April,... [Pg.272]

BS6231 Specification for PVC insulated cables for switchgear and control gear wiring. [Pg.528]

Service equipment- Main control gear at the service entrance, such as circuit breakers, switches, and fuses. [Pg.279]

It is my pleasure to present this book on optimal control geared toward chemical engineers. The apphcation of optimal control is a logical step when it comes to pushing the envelopes of unit operations and processes undergoing changes with time and space. [Pg.305]

EN 60947-5-1 1991 Low-Voltage switch gear control gear, electromechanical control circuit device... [Pg.36]

Asbestos materials may be encountered by electricians in decorative finishes such as artex ceiling finishes, plaster and floor tiles. It is also found in control gear such as flash guards and matting in fuse carriers and distribution fuse boards, and in insulation materials in vessels, containers, pipework, ceiling ducts and wall and floor partitions. [Pg.52]

To evaluate the relative worth of any capital cost impacts which do not show up in the item prices. These may for instance include costs of transport, erection and commissioning, associated foundations, electrical reticulation, instrumentation and control gear, and pipework. Normally the parallel commercial appraisal, excluded from this scope, will include such factors as impact of terms of payment, duties and taxes, foreign exchange, import/export permit availability, and terms of contract. The interface between the engineering and commercial appraisals needs to be co-ordinated. [Pg.144]

IEC60079-1 EN60079-1 UL60079-1 EM 3600 APPLICATIONS SWITCH/CONTROL GEAR CONTROL SYSTEM NSTRUMENTS... [Pg.775]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...