Disclaimer   
Forum Super Search
 ♦ 
×
HashTag:
Member:
Posting Date From:
Posting Date To:
Train Type:
Train:
Station:
ONLY with Pic/Vid:
Sort by: Date:     Word Count:     Popularity:     
Public:    Pvt: Monitor:    RailFan Club:    

Search
  Go  
Full Site Search
  Search  
 
Tue Jan 24, 2017 12:48:31 ISTHomeTrainsΣChainsAtlasPNRForumGalleryNewsFAQTripsLoginFeedback
Tue Jan 24, 2017 12:48:31 IST

Blog Entry# 1939412  
Posted: Jul 23 2016 (20:30)

2 Responses
Last Response: Jul 23 2016 (22:51)
  
★  Info Update
0 Followers
34079 views
Jul 23 2016 (20:30)  
 

Indian Railways the life line of our Nation~   10318 blog posts   133 correct pred (85% accurate)
Entry# 1939412            Tags   Past Edits
What happens when a passenger pull the Alarm Chain (Emergency Chain) in a coach? (ACP, Alarm Chain Pulling)?
The alarm chain in a passenger coach is designed to create a break in the continuity of the brake pipes (whether vacuum or air brakes), immediately resulting in a loss of brake pressure (or vacuum) and thereby cause the train brakes to be applied. With vacuum brakes, a clappet valve is provided that is released by the pulling of the alarm chain, and with air brakes, there is a similar passenger emergency valve that can vent the brake pipe to the atmosphere.
At
...
more...
the locomotive, in addition to a warning lamp or buzzer being sounded, in most locos the master controller undergoes auto-regression, with the notches falling to zero rapidly as the locomotive's motive power is switched off. The guard may also notice the loss of brake pressure (although he may not know it is due to the pulling of the alarm chain) and is expected to apply his brakes as well immediately. It is possible for a driver to override the alarm chain pull in a few circumstances, and this is in fact done in a few cases where it is known that miscreants resort to pulling the emergency chain solely to get the train to stop at a point convenient for themselves (but note that such an act by the driver or guard of deliberately ignoring an indication of alarm chain pulling is a serious offence).
In recent years, locos have been fitted with emergency flashers on the roof of the cab, and these flashers are also activated when the brake pipe pressure is lost for any reason other than the driver's application of the brake valve (A9). This alerts drivers of oncoming trains of the possibility of a derailed or parted rake which may foul other tracks, since the brake pressure may have been lost for those reasons as well, and at the locomotive it is not possible to tell whether the loss of brake pressure is due to the pulling of the alarm chain.
ACP also causes a small lever to be released near the emergency brake valve (usually mounted near one end of the coach) which does not retract to its normal position even when the chain is released. This allows the driver or guard to find out in which coach the ACP actually occurred. When the coach is isolated, the lever needs to be manually reset. Until this is done, the lamp and buzzer in the locomotive cab are continuously activated. A circuit breaker controls the lamp and alarm bell in the locomotive cab; in cases where defective equipment causes the lamp and bell to go off, the driver can disable them by placing the MCB in the 'off' position; despite the obvious safety hazards, sometimes this is resorted to by drivers when driving trains through sections where spurious ACP incidents ae very common.

  
1318 views
Jul 23 2016 (21:33)
Indian Railways the life line of our Nation~   10318 blog posts   133 correct pred (85% accurate)
Re# 1939412-1            Tags   Past Edits
#Admins #Moderator sir if find this suitable then add it in FAQ Section

  
1065 views
Jul 23 2016 (22:51)
TT of Goa Tejas is Disastrous*^~   12932 blog posts   15193 correct pred (74% accurate)
Re# 1939412-2            Tags   Past Edits
Added to FAQ.

ARP (Advanced Reservation Period) Calculator

Reservations Open Today @ 8am for:
Trains with ARP 10 Dep on: Fri Feb 3
Trains with ARP 15 Dep on: Wed Feb 8
Trains with ARP 30 Dep on: Thu Feb 23
Trains with ARP 120 Dep on: Wed May 24

  
  

Rail News

New Trains

Site Announcements

  • Entry# 2136570
    Yesterday (12:25AM)


    Several new features have been introduced recently to the Forum, and we are forever striving to make Member experience here more productive and satisfying. With the recent introduction and success of the new FM System, it has been observed that small groups of highly involved and enthusiastic members are far more...
  • Entry# 2134907
    Jan 21 (02:46PM)


    It has been over 2 weeks since the appointment of the current batch of FMs and 750 Complaints have been handled so far. It gives me immense pleasure in congratulating them for running the team diligently, professionally, competently and above all, without a shred of controversy or bias. The FM position...
  • Entry# 2133126
    Jan 20 (01:29AM)


    The modification to the TL Update scheme - i.e. the introduction of the new RAC System - has led to some efficiency with TL Updates. More TLs are being discussed, and quickly moved up. However, we still have on Average, about 300 Waitlisted TLs in the backlog at any time, and our hard-working and diligent TLMs...
  • Entry# 2126247
    Jan 13 (11:57PM)


    Here are some guidelines for members regarding the new Report button and the revamped FM system: 1. If you have ANY complaint about a blog or ANY other issues, please USE the Report button and file a Complaint. Most complaints are resolved by FMs within seconds/minutes. (Some require further discussion). FMs have...
  • Entry# 2125399
    Jan 13 (08:58AM)


    Often we have some TL Entries seemingly in WaitList forever. Usually, the reason for this is that TLMs have already looked at the TL Entry but are not confident enough to Confirm it or are looking for more inputs from the Member regarding the source, etc. And this delay eventually causes...
  • Entry# 2122843
    Jan 10 (10:15PM)


    This is to address persistent and lingering questions about FM Appointments: . 1. Being an FM is a service. It is NOT supposed to be some kind of "reward" or "medal" to "deserving" members. The ULTIMATE OBJECTIVE of the process is to promptly handle/look into Reports filed by members, which is expected to...
Scroll to Top
Scroll to Bottom


Go to Mobile site