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Power quality is an important subject to correctly dimension protection devices and back up power systems for next generation of telecommunication network. In this paper it is presented an overview of some power quality data obtained using integrated instruments put inside Chloride's UPS, widely distributed in the world and active for quite a few years, allow statistical evaluations to derive some...
This work shows an example of power quality (PQ) data of four important telecommunication sites placed in Rome, Italy. The data are collected, elaborated and analyzed by four self made instruments developed for this purpose and inserted in four automatic telecommunication exchanges kindly at our disposal by TELECOM, the most important Italian telecommunication company. The analysis shows the active...
The solution site power saving, adopted in Telecom Italia by using Ericsson Technology, addresses the Company need of power consumption management optimization on BTS sites.
Fuel cell technology has often been viewed as a promising alternative to batteries and generators for the backup power requirements of the telecommunications industry. Recent collaboration between ReliOn-a fuel cell manufacturer with more than 850 kW of product sold to customers to date, SGS Future-the Italian distributor of ReliOn's fuel cell products, Telecom Italia and Pirelli Labs has resulted...
Customers that operate or depend on IDC service provision often require mission critical availability. Various aspects of uninterrupted power system design and implementation must be carefully considered to ensure that this requirement is met. Faithful interpretation of design standards, high quality production control, intelligent operation and maintenance are among the important factors. The use...
The development of electronic telecommunication systems and the offer of new services have pushed SIP (Italian Operating Telecommunication Company) to update the philosophy of its own power plants also taking into account the objectives of reducing installation, operation, maintenance and management costs. All the above requirements have rise to a new power plant for telecommunication systems realized...
The purpose of this paper is to quickly examine the operating characteristics of the Monolite valve regulated sealed Lead-acid batteries manufactured by FIAMM, to provide the potential user with the minimum information necessary to access the potential advantages of installing and utilizing these batteries in standby applications requiring an absolute minimum maintenance in a variety of environments.
Power supply of digital switching systems asks for a primary stand by power to mains. The stand by power is usually made of high reliability diesel generating systems, since the primary stand by power has to supply the air conditioning system of the telephone exchange rooms, essential for the exchange operation. In order to achieve high reliability levels, the performances of the control and supervision...
In telecommunication plants high reliability is requested for the whole system and, consequently, for each component. Where digital equipment is employed, air conditioning is vital. Therefore it has become essential in the latest years a general use of Diesel Engine Generator (DEG) as standby power supply, not only for telecommunication equipment, but mainly for air conditioning systems. Due to the...
Fiamm have introduced a new lead-acid battery for telecommunications duty which employs a hybrid construction, using low antimony-selenium spines for the tubular positive plates and lead calcium grids for the negative plates. The new battery features low self-discharge and good float charge characteristics. Very low water consumption combined with high electrical efficiency make the battery virtually...
Computers are widely used in telecommunications systems as process control and management units. In this kind of utilization, computers and relevant peripherals demand an uninterruptible a.c. power supply system of high reliability, performance and flexibility. Inverters normally provide uninterruptible a.c. power from the 48/60 V d.c. power source available in telecommunication plants. SIP, the Italian...
After a brief analysis of the power requirements of various telecommunication AC load this paper describes some different uninterruptible power plants presently adopted and compares them from the point of view of performances and reliability. It is then presented a type of uninterruptible AC power plant installed in many SIP (Italian Operating Telephone Company) exchange officies. It is characterized...
This paper describes a device suitable to control the output of several converters, each voltage regulated and parallel operating with forced load sharing, so that, when failure occurs, it becomes possible to identify and shut-down the failed unit without affecting to other parallel connected units. Undervoltage and overvoltage supervision is garanted by the device to avoid output voltage changes...
A new, type of lead acid battery for telecommunications is presented. Its main design features are: Multitubolar positive plate Antimony free positive grid This battery can perform very low maintenance with negligible. open circuit losses and longer service life. Results of tests are reported and significant data from field, regarding two experimental high capacity batteries, in float service since...
This paper deals with a power plant designed to provide a no-break 48 or 60 V nominal DC voltage to traditional and technically advanced telecommunication equipment to supply power ratings of up to 300 A. The power plant uses the basic circuit which was chosen by SIP, Italian Telephone Company, for medium and large power plants (1) and was designed to meet the requirements deriving from the decentralization...
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