Designing 100 line exchange using uni-selector, Electrical Engineering

Assignment Help:

Q. Designing 100 line exchange using Uni-selector?

Here three different designing methods for 100 line exchange are discussed:

Design: Strowger switching system is designed using one two-motion selector for each subscriber. A subscriber is assigned a number in the range 00-99 and same number is used to identify two-motion selector assigned to him. 100 outlets of each two-motion selector are numbered as per the scheme given in table. Corresponding outlets in all the 100 two-motion selectors are commoned and folded back to corresponding inlets. For illustration a subscriber with 87 as his number is assigned two-motion selector 87. Outlet 87 which corresponds to this subscriber is connected to 7th contact in the 8th vertical position of all two-motion selectors and folded back to his inlet. Arrangement is demonstrated in figure. If subscriber 23 dials 87, his two motion selector 23 would step vertically 8 times corresponding to first digit and would step horizontally 7 times to reach contact to which the subscriber 87 is connected. This switch is non- blocking and uses only one stage of switching elements. As two-motion selector is activated by calling party, call is terminated only when the calling party disconnects the line. If a two-motion selector goes out of order, subscriber connected to it won't be able to make any outgoing calls though can receive incoming calls. Design parameters of this switch are:

S =100, SC =50, K = 1, TC =1,

EUF = 0.5, C= 200, CCI =25, PB =0.

694_Designing 100 line exchange using Uni-selector.png


Related Discussions:- Designing 100 line exchange using uni-selector

Explain about elementary direct-current machines, Q. Explain about Elementa...

Q. Explain about Elementary Direct-Current Machines? A preliminary discussion of dc machines, including Equations. The location of the brushes on the commutator arrangement con

Explain steady-state error of linear systems, Q. Explain Steady-State Error...

Q. Explain Steady-State Error of Linear Systems? If the steady-state response of the output does not agree exactly with the steady state of the input, the system is said to hav

Explain polyphase induction motor, Q. Explain polyphase induction motor? ...

Q. Explain polyphase induction motor? The polyphase induction motor operates with polyphase alternating current applied to the primary winding, usually located on the stator of

Functions of regulatory body, Functions of Regulatory Body Set sta...

Functions of Regulatory Body Set standards through setting codes, by miscellaneous orders, by license conditions and by directions in tariff orders; Determine the tari

Water technology, #question. . =calculate the calcium carbonate equivalent ...

#question. . =calculate the calcium carbonate equivalent hardness of calcium sulphate of 5gms present in one litre

Draw a schematic diagram of transformer connections, Q. Three single-phase,...

Q. Three single-phase, 10-kVA, 2400/120-V, 60- Hz transformers are connected to form a three- phase, 4160/208-V transformer bank. Each of the single-phase transformers has an equiv

Dc machince, what ''s part of dcmotor or dc generator

what ''s part of dcmotor or dc generator

Calculate the stator input current, Q. Calculate the stator input current? ...

Q. Calculate the stator input current? The parameters of the equivalent circuit shown in Figure for a three-phase, wye-connected, 220-V, 10-hp, 60-Hz, six-pole induction motor

If a feeder circuit-breaker trips what action is required, Q. If a feeder c...

Q. If a feeder circuit-breaker trips, what action is needed? Ans: First isolate the faulty feeder check the faulty area on which fault the breaker was tripped (open circuit,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd