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Blog Entry# 1580716
Posted: Sep 02 2015 (22:34)

3 Responses
Last Response: Sep 03 2015 (00:49)
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Sep 02 2015 (22:34)   CRJ/Chittaranjan (3 PFs)
 
guest   6387 blog posts
Entry# 1580716            Tags   Past Edits
#railwayengineering
------------ ANATOMY OF WAG-7(ELDER BROTHER OF WAG-9)---------------
This BLOG describes the Interiors of a WAG-7 Locomotive with Pictures :
Courtesy
...
more...
of ALL Pics: Zubin Dotivala
1 Three Phase Blower Motor
Link : click here
2 Compressor Motor
Link: click here
3 Arno Rating Plate
Link: click here
4 Blower Fan
Link: click here
5 Brake Pressure Gauges
Link: click here
6 Switches in Cab
Link: click here
7 Compressor
Link: click here
8 Arno
Link: click here
9 Connector
Link: click here
10 Connector 2
Link: click here
11 Fuse
Link: click here
12 Cab Heater
Link: click here
13 Interior Switches
Link: click here
14 Loco Direction Reversing Contactor
Link: click here
15 Signaling Relays
Link: click here
16 Part of Rectifier
Link: click here
17 Relays
Link: click here
18 Selector Switches
Link: click here
19 Selector Switches 2
Link: click here
20 Silicon Rectifier
Link: click here
21 Flasher Light Panel
Link: click here
Thumbnail View of all images

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Sep 02 2015 (22:49)
guest   6387 blog posts
Re# 1580716-1               Past Edits
Can anybody tell me what is the Function of "Three Phase Blower Motor" in Conventional Loco WAG-7?
What is the Functionality of "Silicon Rectifier" in WAG-7 ?
Image Link: LGD WAG-7
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Sep 03 2015 (00:47)
TheMadrasMail~
TheMadrasMail~   6349 blog posts
Re# 1580716-2              
In the context of DC motor based locos, Silicon rectifiers or Silicon-controlled rectifiers are used to convert AC voltage into DC voltage to power the traction motors. ( Conversion of AC to DC is called rectification, hence the name rectifier). In simple terms these are just switches that conduct current only in one direction ( basically DC currents) and a type of Thyristors. GTO thyristors used in the earlier WAP5 designs are also a type of Silicon rectifiers.
All the components of an electric locomotive like the transformers, starting resistances ( in case of DC motor based locos), static converter and VFD circuitry (in 3 phase locos) and mainly the traction motors generate a LOT of heat.
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more...
Especially for higher power locos, more power is extracted from the locomotive by pumping more current into it rather than using heavier and more powerful equipment ( as the weight is limited by the maximum bearing capacity of the track). This generates even more heat making cooling extremely necessary. Blower motors are used to cool the Traction motors and the other equipment in the locomotive.

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Sep 03 2015 (00:49)
guest   6387 blog posts
Re# 1580716-3              
Understood Completely.
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