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Engineering Problem Solving Course

The document discusses power routing diagrams for a BTS site and automatic transfer switch components. It includes diagrams of power routes for a BTS site with inputs from the mains and generator, and outputs to various site equipment. It also details the components of an automatic transfer switch, including contactors, timers, and indicators for power source availability and load transfer status.

Uploaded by

Salih Ahmed Obeid
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPT, PDF, TXT or read online on Scribd
372 views20 pages

Engineering Problem Solving Course

The document discusses power routing diagrams for a BTS site and automatic transfer switch components. It includes diagrams of power routes for a BTS site with inputs from the mains and generator, and outputs to various site equipment. It also details the components of an automatic transfer switch, including contactors, timers, and indicators for power source availability and load transfer status.

Uploaded by

Salih Ahmed Obeid
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PPT, PDF, TXT or read online on Scribd
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Objectives

The Objective of this course is to give


Field Teams a ‘hands on’ experience of
solving engineering problems.
Power routes for BTS Site

63A
E.L.C.B
D 10A, 2P
Mains ATS I In/Out door Lights
(WAPDA 03 Φ)
S
Generator T 10A, 2P Tower Lights
(03 Φ)
R
I 10A, 2P Emergency Lights
B

RF Antenna
U M/W
10A, 2P Fire Device Antenna
T
I 16A, 2P E.L.C.B. 25A Sockets
O
N BTS Cabinet
Microwave
32A, 2P ACs IDU

P
A 10A/32A
Spares
2P (each)
N DC Supply

E 32A, 4P
-54V
Rectifier
L

LVD
(AC Supply)
Battery
(D.P) Backup
CONTENTS

 ………… Introduction

 ………… Equipment Description

 ………… Installation and Wiring

 ………… Maintenance and Component Replacement

 ………… Handling
ATS

Generator Load
(Standby Source)

WAPDA
(Normal Source)
AUTOMATIC TRANSFER SWITCH
ATS

Cable Glands

Ducting for Power Cables


ATS Components 0

3 1

Fuses
ATS Selection Switch

Electromechanically Relay Timer Delay Relays

Magnetic Contactors

3 Phase Monitor (UVR)


Indicators Circuit Breakers
Auxiliary Contact Block
Interlock Unit

Front Mount

Magnetic Contactor Coil


Contacts Status
ATS Selection Switch Position Mains control (Φ)
Gen set control(Φ)
Gen Auto Start

Input (1) Output (A1)


OFF Input (2) Output (B2)
Input (3) Output (C3)

Input (1) Output (A1)


1 Input (2) Output (B2)
(Mains) Input (3) Output (C3)

Input (1) Output (A1)


2 Input (2) Output (B2)
(Auto) Input (3) Output (C3)

Input (1) Output (A1)


3 Input (2) Output (B2)
(Gen) Input (3) Output (C3)
ATS Selection Switch Position:

Four positions;
0 = OFF
1 = Normal Source
2 = Auto Function
3 = Emergency Source

Power Source Availability:


Provides LEDs to indicate if a power source is available. LEDs
may be Red, Yellow & Blue for 03 phases.
(a) Normal Source (WAPDA) – Available
(b) Emergency Source (Generator) – Available

Load Transferred Availability:


Two LEDs for Normal & Emergency Source.
POWER CABLES BEFORE & AFTER PM

Before PM After PM
Wapda phase (In)
Gen phase (In)

N (0) N (00)

Coil Coil

NC
v

NC
Wapda Gen
Magnetic Magnetic
Contactor Contactor

Interlock (Mechanical & Electrical)


MCB Order Information

S25 1S C10

Type Rated Current

Pole

17.5 mm 4 Pole
Catalog number explanation

A9-30-10-84

Frame size Coil voltage


(see coil voltage selection chart)
Power pole
30 = 3 NO
Auxiliary contacts
40 = 4 NO
22 = 2 NO & 2 NC 10 = 1 NO & 0 NC
01 = 0 NO & 1 NC
11 = 1 NO & 1 NC
00 = No auxiliary provided

Coil voltage selection chart


Hz 12 24 48 110 120 125 208 220 240 277 380 415 440 480 500 600

50 81 83 84 84 34 36 80 42 86 86 51 53 55

60 81 83 84 80 85 86 55
SINGLE GENSET ATS
DUAL GENSETS ATS
Thank You

20

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