INPLANT TRAINING PRESENTATION

ROHIT BHARGAVA07BEC286BTECH ECE

ROURKELA STEEL PLANT

Rourkela Steel Plant (RSP), the first integrated steel plant in the public sector in India

Was set up with German collaboration with an installed capacity of 1 million tonnes.

RSP was the first plant in India to incorporate LD technology of steel making.

currently has the capacity to produce 1.9 MT of steel

PLANT PRODUCTS

Plate Mill Plates HR Plates HR Coils ERW Pipes SW Pipes Sheets & Coils Galvanized Sheets Electrolytic Tin-Plates Silicon Steel Sheets Total Saleable Steel

COMMUNICATION IN PLANT

Telephone

Public address system Mobile

Loud Speaker Push to talk (PTT)

Base communication

VHF RADIO COMMUNICATION

Radio frequency range - 30 MHz to 300 MHz. Ideal for short-distance terrestrial communication The VHF devices used by the plant were PTT and

BASE COMMUNICATION VHF is also less affected by atmospheric

noise and interference

PUSH TO TALK(WALKY –TALKY)

MOTOROLA GP338---- With 128 channels

advanced model

MOTOROLA GP328---- With 16 channel

PUSH TO TALK(WALKY –TALKY)

PTTs are easily programmable Plant has to pay a yearly subscription fee to the

Government of India range around 3-4 Km PROFFESIONAL RADIO CPS (customer

programming software) which is provided by the company MOTOROLA itself.

Devices can also be cloned. 

PROFFESIONAL RADIO CPS

PTT MODES

CSQ or Carrier Squelch is communications with no codes. Codes help filter out unwanted transmissions. Its open to all

TPL or Tone Private Line modulates at a low frequency.

DPL or Digital Private Line modulates a series of binary codes.

Both users must be on the same TPL or DPL to communicate

Advantage of TPL is that DPL takes too long to decode

BASE STATION

Is one end of a communications link

The other end is a movable vehicle-mounted radio or walkie-talkie

upto 255 channels.

12 volts power supply.

range -- 100 to 200 km- so need antenna at height

mouthpiece -- programmable port

LOUD SPEAKER

very common method of communication short distance communication -- address a congregation

of employees Its general purpose is to amplify the sound of user It cannot reproduce sound <200hz. consists of a line matching transformer

PUBLIC ADDRESS SYSTEM

Traditionally used for staff announcements and background music, safety warnings from fire and bomb alerts

The plant PA system handle upto 80 stations . The stations are set by the telephone exchange

the most fastest way of communicating

PUBLIC ADDRESS SYSTEM

TELEPHONE EXCHANGE

The plant maintained two exchanges The one in the plant provided the

intercom and public address services along with the connection with the town exchange with the help of junction cable.

The township exchange was present in the town and from there the lines were distributed throughout the town .

EXCHANGE LAYOUT

EXCHANGE

power supply -- 3 phase . Emergency supply also available but variation is high .A step down transformer is used to step down the voltage required to acceptable level

The battery room provides a back up in case of power failure . Supply voltage is 48v . There are two sets of battery sets in the exchange one is connected and second charging

The technology used here in the exchange is pulse code modulation and time division modulation . Prior to this the technology used was C.bot

Cards used in exchange are TONE SENDING card and TIME SWITCH card The tone sending card is responsible for the dial tone A card can hold upto 8 numbers of users. When a person calls, the light

for that no on the card flashes in the exchange. The distribution unit consists of many relays and wires mounted on a

rack which is grounded to make it lightening proof. From here the wires are sent to the users to their home. When person wants to have his no changed this is done by relocating the wires here.

CARDS

OPERATOR CARD- interface analog suscriber line with digital switch. TRUNK CARD- same as OC but interfaces with analog trunk lines ANNOUNCEMENT CARD- tones stored PROCEDURE CARD- digital switch ,connects two users, TDM SIGNAL CARD- receive /send info to/from terminal cards in multiplexed

fashion CONFERENCE CARD- party conference POWER SUPPLY CARD- energy source for cards

CABINET

C BOT

DISTRIBUTION UNIT

The distribution unit consists of many relays and wires mounted on a rack which is grounded to make it lightening proof. From here the wires are sent to the users to their home. When person wants to have his no changed this is done by relocating the wires here.

OUTDOOR EQUIPMENTS

Underground jelly filled cable Junction box Junction Cable- between two Exchange Relay unit Telephone instruments—Krone tool ,

Cable Fault Locator , Cable joining Kit

JELLY FILLED CABLE

1 .Better insulation resistance value 2 . low capacitance 3.lower capacitive coupling 4 .Reduced maintenance cost 5.High safety against corrosion

JOINING TWO CABLES

Preparation-mark on both ends,remove jacket

steel tape armor ,polyAl sheets

Conductor joining-twist 2 rounds, cut extra

conductors.

Sealing-make bag of polyethylene sheet over

joint, pour jelly , wrap with pvc. Wrap armour wire then solder it

Cleaning- wrap aluminium tape around sheet.

smooth ---else it cracks

RAILWAY SIGNALLING

POINT MACHINE--- is used to change tracks .The one in the plant is supplied by Siemens

POINT MACHINE

WORKING

Operator operates from control room ,the induction motor gets supply through different relays .It operates in one direction and is stopped by limit switch .When machine works perfectly the operator gets steady indication light on the Control board and the train moves. If any trouble i.e. the operator gets a flashing light and a person is immediately send to get it repaired.

If there remains a gap between the tongue rail and the fixed rail then there is a fault with the machine.

The safety switch when turned on cuts off supply in the 2 out of three phases of motor’s supply.

CONTROL ROOM

to control the changing of the tracks Tracks are selected by pressing the buttons on the to

be selected lines light indicator shows the lines status whether active

or not and if it flashes there is some error in the line

 RELAY ROOM

Contains the complex circuitry Relays arranged to form relay logic Each box has 3 relays

THE END