Interested to Buy Any Domain ? << Click Here >> for more details...
Can any body tell me what is use of END OF LINE RESISTOR in
fire alaram circuit?
- 2 Answers
- 7434 Views
- I also Faced
- E-Mail Answers
Answer Posted / kevin hackart
THE END-OF-LINE RESISTOR IS USED IN MOST ALARM SYSTEMS AS A
CABLE FAULT MONITORING DEVICE, EG.CABLE CUT BY INTRUDER.
THE MAIN CIRCUIT USES A SPECIFIED RESISTANCE AND THE MOMENT
THAT VALUE ALTERS OR DISAPPEARS IT TRIGGERS THE ALARM. ALSO
WHAT COULD BE USEFUL IN FIRE ALARMS IS IF THE CABLE IS
BURNT OFF OR HEATED THUS CHANGING THE RESISTANCE FURTHER
DOWN THE LINE IT WILL ALSO TRIGGER THE ALARM AND COVER FOR
A FAULTY DETECTOR. MAINLY THE RESISTOR IS FOR TAMPERING AS
MOST SYSTEMS USE A NORMALLY CLOSED LOOP AND SO IT IS EASY
FOR SOMEONE TO JUST SHORT OUT THAT CIRCUIT WITH A PIECE OF
WIRE, A SPECIFIC RESITANCE MAKES IT TOUGHER TO BE BYPASSED.
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
all interview questions with answers of ntpc (2000-2009
How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?
WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.
in a solar power plant,we are going to step up the voltage 350V to 33kv, and to 132kv GSS. i want to ask that if it is possible that 315v/33kv is not possible because we also use 315v/11kv. or it should be 415v/33kv? is it effects generation or losses? the second question is-generation is depends on LV winding? or LV winding design for generation voltage?
What is the function of capacitor in electrical circuits?
How halogen & merquery lamp works.
hi friends i m from electrical branch and seeking for tech. + apti. both papers of hpcl plz get it available as soon as possible
Usage of flywheel diode in relays
What are the difference between normal application Transformer and Solar application Transformer?
Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?
what is the effect of power factor of machines in starting current
Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?
raleigh method
1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done
how to calculate micom relay earth falt time and current sertting
