No official Railway Board PDF has been traced for this entry yet. The text below was read from the document held in the library.
| Type | Commercial Circular |
|---|---|
| Topic | reservation |
| Currency | Currency not verified |
route release button relay Single ACI relay units as well as two relay units, (i) with one ACI relay and one ordinary relay
IRISET
7 -SIGNA LL LING RELAY YS 5
- AND CABLES
See Indian Railways Institute of ee
= — Signal Engineering and Telecommunications — ~
PEE SECUNDERABAD-600017 =
S 19
SIGNALLING RELAYS & CABLES
Issued in November 2009
INDIAN RAILWAYS INSTITUTE OF
SIGNAL ENGINEERING & TELECOMMUNICATIONS
SECUNDERABAD - 500 017
S-19
SIGNALLING RELAYS AND CABLES
Prepared By
D. Raju IES6
Umesh V Kulkarni IES 4
Checked By
P. Sreenivasu , LS 2
Approved By
Ch. Mohan, SPS
DTP
P.V.Surya Narayana, JE-I (D)
No.of pages
141
Date of Issue
November , 2009
Revision No
A2
© IRISET
http://www.iriset.ac.in
CONTENTS
S.No
CHAPTER
PAGE NO
1.
Introduction
1
2.
Signalling Relays
10
3.
Shelf Type DC Line & Track Relays
18
4.
Plug In Type DC Line Relays (Metal-Carbon contacts)
27
5.
Plug In Type DC Line Relays (Metal-Metal Contacts )
40
6.
Lamp Proving Relays
68
7.
Time Element Relays
75
8.
Plug In Type Track Relays
79
9.
Siemen’s Thermo Flasher Unit
84
10.
Slow Acting Relays
86
11.
DC Polar Relay
89
12.
Signalling Cables
91
Annexure-A
SEM Extract of Para 614 on underground Cables
106
Annexure-B
Cable Testing Proforma
108
Annexure-C
Relay Specifications and Relay Data Sheets
109
“ This is the Intellectual property for exclusive use of Indian Railways. No part of this publication may be
stored in a retrieval system, transmitted or reproduced in any way, including but not limited to photo
copy, photograph, magnetic, optical or other record without the prior agreement and written permission
of IRISET, Secunderabad, India”
INTRODUCTION
Page 1 SIGNALLING RELAYS & CABLES
CHAPTER 1: INTRODUCTION
1.1
INTRODUCTION
Signalling systems used more mechanical signalling components. Gradually they were
reduced with the usage of electric point machines, electromagnetic relays and electric locks.
The two essential components used in this Electrical signalling are "Relays" & Cables ".
These find their application in modern control systems also.
Relay scan be classified based on type of contacts material used as-
a) Metal to Metal contact
b) Metal To Carbon (Silver impregnated graphite)
Based on the usage, the relays can be classified as-
a) Line relay
b) Track Relays
c)
Lamp Proving Relays
d) Timer Relay
e) Flasher Relay
f)
Contactor Relays
Based on polarity requirement of a relay relay can be classified as –
a) Polar Relay
b) Neutral Relay
Details may be seen in Chapter1 to 10
Cables for signalling use are mainly of two types
a) Signalling Cable
b) Power Cable
Details may be seen in Chapter No-12
Let us study certain symbols, abbreviated nomenclatures.
1.2
SYMBOLS AND NOMENCLATURE:
Symbols are brief sketches which represent the character and main function of the equipment.
These are usually accompanied by numerical and/or alphabetical terms to specify and
identify them with a particular device or its component.
Nomenclature is a collection of simple and brief designations of apparatuses to describe
their nature and location.
In an electrical circuit diagram straight lines represent the wire connections between the
specified devices or their components with their symbols and nomenclatures. These also
include the wire terminals, the separation between locations as well as the interconnections
between power sources, controls and the operated loads.
The power signalling systems on our railways conform to two practices: (1) The British
Railway practice and (2) the continental or German practice. Therefore we adopt two different
languages each peculiar to one of the two practices. There are some few common elements
between them but broadly they differ very sharply.
INTRODUCTION
IRISET
Page2
To study the various symbols and nomenclatures, the signalling gears may be broadly
classified as: -
(1) Signals (2
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