what happens after the 51 element trips?

[mbaxter1]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

[Warrengarber]

It is really hard to see but the two 50/51 elements in the SR relay operate and next will operate the 86-1 and the 86-2 lock out relays. The two lock out relays will then energize the trip coil (TC). So I think the answer should be C.

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

[Nick1234]

It is really hard to see but the two 50/51 elements in the SR relay operate and next will operate the 86-1 and the 86-2 lock out relays. The two lock out relays will then energize the trip coil (TC). So I think the answer should be C.

This is what i see too, though there are some NO and NC contacts before and after the 86-1 and the 86-2 lock out relays which are not labeled. Depending on which state they are in could change the answer

[GreenHornet]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

looks like there is 2 51 relays so like which ever one operates trips the associated 86/lockout which trips the breaker

[GreenHornet]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

looks like 2 51 relays, each trip their own 86/lockout which trips the breaker

[akumaleon]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

A)Trip coil energizes and opens the breaker

B and D are correct! Relay 86-1 will operate due to the closed contact and will energize TC.

C and E are wrong. Relay 86-2 will never operate due to the open contact.

[keatigp]

This is what i see too, though there are some NO and NC contacts before and after the 86-1 and the 86-2 lock out relays which are not labeled. Depending on which state they are in could change the answer

The normally closed contacts surrounding a lockout coil in most cases are contacts that open on the operation of a lockout to protect its own coil.

[Izeldeen]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

D) 86-1 relay operates

[hmathis1976]

If you review the schematic there are two elements that are mapped to two N.O contacts which upon exceeding the threshold the relay should close both outputs which in turn will roll both 86-1 and 86-2 LO Relays. Please Advise.

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

[chils15]

Given a circuit breaker schematic what happens after the 51 element trips?

A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates

its hard to read this diagram can anyone help?

When the relay operates on a 51 function both the 86-1 & 86-2 will get 65V+. The coil of the 86-2 will not be energized since there will be no negative voltage going to it with the contact points below are still open. The question is "after" the function asserts, so the very next thing that happens is the 86-1 coil operates. The trip coil would be after that.