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C37-102-2006 interpretation of DC circuit for multifunction relay

C37-102-2006 interpretation of DC circuit for multifunction relay

C37-102-2006 interpretation of DC circuit for multifunction relay

(OP)
I just bought the IEEE GUIDE FOR AC GENERATOR PROTECTION Std C37.102-2006. The novelty is the use of multifunction relay.
I'm referring to items in bold below, Figure 6-3.
1- Are there two independent panels to MGPS #1 and MGPS #2?
2- What does it means simulltaneous trip #1 and #2 , unit separation trip?
3- generator trip means both MGPS#1 and #2 will trip same trip coil of CB generator? .
6. Multifunction generator protection systems8

6.2.3 Protection function tripping schemes

Figure 6-3 shows the implementation of tripping logic for the protection of a unit-transformer configuration
using MGPSs. The use of two MGPSs allows further flexibility in tripping logic configuration by
eliminating common mode failures, thus allowing greater dependability. Initiating different lockout relays
for the same function, such as the generator differentials on each MGPS, is an example of greater
dependability. Initiating those same lockout relays, one with a generator neutral ground overvoltage function
(59G) from one MGPS and the other MGPS with a generator neutral ground overcurrent function (50/51G),
is an example of providing redundant protection using alternative functions as a means of improving
dependability.

Figure 6-3—Typical tripping configuration for a large or important generato
r

RE: C37-102-2006 interpretation of DC circuit for multifunction relay

(OP)
I found all the explanations in 7.2.2 tripping mode. Our company takes a tripping mode quite different what led me to this thread.
It was a rush on my part. Sorry for this thread.

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