Manufacture of Q-SERIES RAILWAY SIGNALLING RELAYS to meet all types of Signaling Circuit Application
Manufacturing of Q SERIES RAILWAY SIGNALLING RELAYS to meet all types of Signaling Circuit Applications such as Route Relay Interlocking, Panel Interlocking, Automatic Signalling, Point Operation and Track Circuiting. Each individual type of relay undergoes extensive TYPE TESTING by Research Design and Standards Organization (R.D.S.O., Lucknow) of the Indian Railways and approved for use in Railway signalling circuits.
Manufacture of RDSO Approved QN1 Neutral Line Relays
Manufacture of RDSO Certified QN1 Neutral Line Relay
Manufacture of RDSO Approved QNA1 Neutral Line Relays
Manufacture of RDSO Certified QNA1 Neutral Line Relay
Manufacture of RDSO Approved QS3 Neutral Line Relays
Manufacture of RDSO Certified QS3 Neutral Line Relay
Manufacture of RDSO Approved QN1K Neutral Line Relays
Manufacture of RDSO Certified QN1K Neutral Line Relay
Manufacture of RDSO Approved QNN1 Neutral Line Relays
Manufacture of RDSO Certified QNN1 Neutral Line Relay
Manufacture of RDSO Approved QNNA1 Neutral Line Relays
Manufacture of RDSO Certified QNNA1 Neutral Line Relay
Manufacture of RDSO Approved QNA1K Neutral Line Relays
Manufacture of RDSO Certified QNA1K Neutral Line Relay
Manufacture of RDSO Approved QT2 Track Relays
Manufacture of RDSO Certified QT2 Track Relay
Manufacture of RDSO Approved QTA1 Track Relays
Manufacture of RDSO Certified QTA1 Track Relay
Manufacture of RDSO Approved QTA2 Track Relays
Manufacture of RDSO Certified QTA2 Track Relay
Manufacture of RDSO Approved QBAT Track Relays
Manufacture of RDSO Certified QBAT Track Relay
Manufacture of RDSO Approved QBA1 Biased Relays
Manufacture of RDSO Certified QBA1 Biased Relay
Manufacture of RDSO Approved QBBA1 Biased Relays
Manufacture of RDSO Certified QBBA1 Biased Relay
Manufacture of RDSO Approved QBCA1 Biased Relays
Manufacture of RDSO Certified QBCA1 Biased Relay
Manufacture of RDSO Approved QUCX1 Lamp Proving Relays
Manufacture of RDSO Certified QUCX1 Lamp Proving Relay
Manufacture of RDSO Approved QECX51 Lamp Proving Relays
Manufacture of RDSO Certified QECX51 Lamp Proving Relay
Manufacture of RDSO Approved QECX52 Lamp Proving Relays
Manufacture of RDSO Certified QECX52 Lamp Proving Relay
Manufacture of RDSO Approved QECX53 Lamp Proving Relays
Manufacture of RDSO Certified QECX53 Lamp Proving Relay
Manufacture of RDSO Approved QECX61 Lamp Proving Relays
Manufacture of RDSO Certified QECX61 Lamp Proving Relay
Manufacture of RDSO Approved QFPR1 Lamp Proving Relays
Manufacture of RDSO Certified QFPR1 Lamp Proving Relay
Manufacture of RDSO Approved QECX20 Lamp Proving Relays
Manufacture of RDSO Certified QECX20 Lamp Proving Relay
Manufacture of RDSO Approved QECX2 Lamp Proving Relays
Manufacture of RDSO Certified QECX2 Lamp Proving Relay
Manufacture of RDSO Approved QECX3 Lamp Proving Relays
Manufacture of RDSO Certified QECX3 Lamp Proving Relay
Manufacture of RDSO Approved QL1 Latch Relays
Manufacture of RDSO Certified QL1 Latch Relay
Manufacture of RDSO Approved QSPA1 Slow In Action Relays
Manufacture of RDSO Certified QSPA1 Slow In Action Relay
Manufacture of RDSO Approved QSRA1 Slow In Action Relays
Manufacture of RDSO Certified QSRA1 Slow In Action Relay
Manufacture of RDSO Approved QNHX1 Relays
Manufacture of RDSO Certified QNHX1 Relay
Manufacture of RDSO Approved QNHXC1 Relays
Manufacture of RDSO Certified QNHXC1 Relay
DESCRIPTION RELAY TYPES DETAILS
Neutral Line Relays QN1,QNA1,QS3,QN1K,QNN1,QNNA1,QNA1K
Track Relays QT2,QTA1,QTA2,QBAT
Biased Relays QBA1,QBBA1,QBCA1
Lamp Proving QUCX1,QECX51,QECX52,QECX53,QECX61,QFPR1,QECX20.QECX2,QECX3
Latch Relays QL1
Slow In Action Relays QSPA1,QSRA1
Other Relays QNHX1,QNHXC1
PLUG IN TYPE RELAY
- Introduction
A relay is an electromagnetic device, which is used
for closing or opening of an electrical circuit. The
relay may be classified as Shelf type and Plug-InType
Plug-in-type relays which are plugged in to prewired terminal boards. It works on electromagnetic
principle. Each relay has a base electromagnet,
armature, contact spring, contacts, transparent cover,
and handle. A non-magnetic residual pin is fixed on
the inner face of armature, in all relay except
magnetic latch relays.
When current is applied through the coil, it sets up a
magnetic flux through the bar magnet, core, L shape
heelpiece and armature.
The flux causes armature to attract towards the pole
face. Armature picks up and fronts contact closes.
The residual pin maintains small air gap in attracted
position.
When current interrupts, magnetic flux collapses the
contact spring fixed above the armature helps in
restoring to its full released position thus front
contacts open.
1.1. Classification of Signaling Relays
Relays may be classified into various ways
depending upon the following factors:
i) Mounting of relay
• Shelf Type
• Plug –in type
ii) Feed source
• DC Relay
• AC Relay
• Electronic Relay
DC relays are further classified as under
• Neutral
• Polar
• Neutral Polar
iii) Contact material
• Proved Type
• Non proved Type
iv) Application
• Track
• Line
• Special
v) Importance / vitality
• Vital
• Non Vital
Now a days Electronic relays are also used in
signalling circuit to achieve time delay.
1.2 Definition
i) Non – fusible contacts
A pair of contacts in which one contact element
comprises of non – fusible material which present
practically no risk of welding of contacts.
ii) Carbon contacts
“Carbon” in the expression “ Carbon to metal
contacts” is used as a general term covering graphite
and compounds and mixtures of carbon and metals.
iii) Metal contacts
Metal in the expression “Carbon to metal contacts”
and “Metal to Metal contacts” is used as a general
term covering the use of silver, silver cadmium
oxide, tungsten, platinum or any other suitable
material to an approved specification.
iv) Front contact
That contact which is made with the arm contact
when the relay is energised.
v) Back contact
That contact which is made when the relay is de
energised.
vi) Arm contact (Armature contact)
That contact which is the movable part of the pair of
contacts and makes with front contact when the relay
is energised and with back contact when the relay is
de-energised.
vii) Arm
The movable part of the pair of contacts.
viii) Dependent contact
The condition in which a movable arm contact
connects to a front contact when the relay is
energised. And the same arm contact connects to a
back contact when the relay is de-energised.
ix) Independent contact
The condition in which the movable arm contact
connects to either a front or a back contact but not to
both.
x) Pickup value (Operate value)
The value of the current or ampere turns which is
just sufficient to close all the front contacts of relay
under specified conditions.
xi) Drop –away (release) value
The value of the current or ampere turns at which all
the front contacts of relay get open under specified
conditions.
xii) Proved type Relay
Means a relay having Metal to Metal contacts. They
are used for controlling non vital circuits and hence
also called as non vital relays.
xiii) Non proved Relays
Means a relay having Metal to Carbon contacts, as
front contact. They are used for controlling vital
circuits and hence also called as vital relays.
Regards,
CONTACT PERSON :
MUKESH SHAH
Director
Mobile No. 0091 – 9820292499
Email – marketing@rolexmetals.com
ROLEX METAL DISTRIBUTORS
57-A Khatargalli
Thakurdwar
Mumbai – 400 002 India
0091-22-23858802
0091-22-23823963
0091-22-23898724
marketing@rolexmetals.com
www.rolexmetals.com