Interested to Buy Any Domain ? << Click Here >> for more details...
what is the difference between the 94 lockout relay and 86
lock out relay. I have noticed that the 94 lockout relay is
activated when the distance realy is activated and 86 is
activated when the 87T differential is activated. but why
can't the same lockouts be used for both the protection
schemes
- 10 Answers
- 72858 Views
- ABB, I also Faced
- E-Mail Answers
Answer Posted / syed furqan akhter
94 relay shall not be called out the lockout relay.It is
basically a self reset relay.Its contacts operate till the
fault persist or its coil energizes and when its de-
energizeits contact reach its normal position. Its usage is
where Autoreclosing is required to close the Circuit
breaker whenever temporary fault occurs.Therefore in
overhead lines this relay (94)is used.
While 86 relay is a lockout relay means once its coil
enrgizes its contact will be operated and will never come
its normal position until it is reset by hand or
electrically. Therefore it is used where permenant faults
occurs and no autoreclosing scheme is posible.
| Is This Answer Correct ? | 37 Yes | 1 No |
Post New Answer View All Answers
How to decide and select the different earthing wire size for the different types of earthing
design a 3 bit synchronous and asynchronous counter using T- flipflop
How much voltage we need to apply in 33kv cable during hipot test of cable
CAN U PLEASE TELL ME SOME G.D TOPICS FOR APGENCO INTERVIEW&G.D
The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?
What must be the distance between the Earth pit which are grounded from two different sources. Example: Distance between the earth pit for LV Panel-1 & 2
What is the exact minimum vale of voltage between an earth and netural which can damage or can do malfunction of the electronic equipments ? If this is mentioned in any book, pl.give reference.
Air refrigeration cycle works on the
hi friends if you have any 400KV Substation Erection and installations Drgs please send to me.My email id:kandi.suresh441@gmail.com
what is formula for calculate thermal overload in new numiricalrelay( not in bimetal relay)?
What is the main use of rotary phase converter ?
How dia computation perfomed in cold rolling mills .
Write the analogous electrical elements in force current analogy for the elements of mechanical translational system.
Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.
What is warm / cold start of HT motors. How many warm start & cold start are possible in a day?
