45
O U T L I N E D R AW I N G S
Circuit diagram of enclosure for 38 kV circuit breakers
Graphical symbols for electrical diagrams (IEC 60617 standard)
Circuit diagram of enclosure for 38 kV circuit breakers
Reference designation of objects in electrical documents in compliance
with standard IEC 81346-2 and ABB technical standard 2NBA000001/ANSI
Represented operational state
The diagram indicates the following conditions:
• Circuit breaker off and connected
• De-energized circuits
• Discharged closing springs
Caption
□ = Reference number of diagram figure
* = See note indicated by the letter
Desig.
IEC
Desig. ANSI
BER
Device for the supervision of shunt opening release coil continuity (see note B)
BGB1
52a, 52b
Circuit breaker auxiliary contacts
BGB4
52b
Auxiliary passing contact (closing momentarily when circuit breaker opens)
BGB11
Contact to break the -BGB4 signaling during manual opening operation
BGS1
33LSa, 33LSb
Limit switch of spring charging motor
BGS2
33LSa, 33LSb
Limit switch signaling closing springs charged or discharged
FCM2
Miniature breaker with thermomagnetic O/C release (ABB S202M-K..UC)
MAS
88M
Motor for closing charging springs (see note A)
MAT
Motor drive for racking circuit breaker in and out of cell
(direct current supply) allocated on circuit breaker’s truck
MSC
52X
Shunt closing release
MB01
52TC1
First shunt opening release (see note B)
MB02
52TC2
Second shunt opening release (see note B)
MBU
27UV
Instantaneous undervoltage release (see note C)
PFG
LED signaling circuit breaker in isolated position
PFR
LED signaling circuit breaker in connected position
PFY
LED signaling circuit breaker in test position
PFW
LED signaling circuit breaker in racking
QAB
52
Main circuit breaker
RLE2
Locking magnet on truck (if de-energized, prevents circuit
breaker from racking in or out mechanically)
RLE2.1,...,3
Contacts activated from -RLE2
SFC
Push button or contact for circuit breaker closing
SFC3
Push button for circuit breaker rack in
SFC4
Push button for circuit breaker rack out
SFO
Push button or contact for circuit breaker opening
XDB1, 2
P1, P2
Connectors for circuit breaker circuits
XDB12
P12
Spring charging motor connector
XDB4, 6, 7, 8, 13, 14
P4, P6, P7, P8, P13, P14
Connectors of accessories
MV1
Rear fan
BW1
Flow sensor
XDB5455
Fan and sensor connector
BGT15
Auxiliary contacts for signaling: connected–extracted (TOC)
TB
Thermal contacts for fan motor overheating