Citadel 2.0 - Instruction Manual - page:
124
IM
-
C
2.0
-
12
/2
5
/3
0/
4
0/
DO
/F
X
| V
: 1
0 / 1
1 / 2
0
21
Checking the primary power path;
The primary power path pole assembly consists of the three vacuum interrupters in an
insulated molded mounting assembly for 6” pole spacing breakers. A primary power
paths are open air heatsink clamped VI’s for 10” centers. For drawout Citadel breakers,
each pole assembly has an upper and lower moving primary disconnect (finger cluster).
These components should all be checked for cleanliness and condition. Finger clusters
should be checked for strength of spring tension and should have conducting grease
applied.
The vacuum interrupters are also checked for vacuum integrity.
To perform the contact-erosion check – it may be a good practice to couple this with
the manual spring-charging check of the operator, since charging of the spring is
necessary to place the contacts in the CLOSED position.
Note
– depending on the way the Citadel element is mounted– especially when using
a fixed Citadel element for vacuum conversion of legacy air and oil breakers – it may
not be possible to see the contact erosion dot.
15KV
Closing data
Opening Data (ms)
Contact
Resistance
Contact
Resistance
MAX
Closing
time
Pole
spread
Main con-
tact part
Pole
spread
Open coil
Res (Ohm)
1200A
< 60 ms at
rated Aux
voltage
< 2.0 ms.
< 50 ms at
Rated aux
voltage
< 2.0 ms.
44..0 Ω
(125v DC)
< 40 µΩ
Plus
100%
2000A
< 60 ms at
rated Aux
voltage
< 2.0 ms.
< 50 ms at
Rated aux
voltage
< 2.0 ms.
44..0 Ω
(125v DC)
< 40 µΩ.
Plus
100%
3000A
< 60 ms at
rated Aux
voltage
< 2.0 ms.
< 50 ms at
Rated aux
voltage
< 2.0 ms.
44..0 Ω
(125v DC)
< 40 µΩ.
Plus
100%
4000A
< 60 ms at
rated Aux
voltage
< 2.0 ms.
< 50 ms at
Rated aux
voltage
< 2.0 ms.
44..0 Ω
(125v DC)
< 25 µΩ
Plus
100%
TABLE 19
M A I N T E N A N C E
