Citadel 2.0 - Instruction Manual - page:
43
IM
-
C
2.0
-
12
/2
5
/3
0/
4
0/
DO
/F
X
| V
: 1
0 / 1
1 / 2
0
21
Motor-operating mechanism
(refer to Figure 18)
The spring-charging motor is bolted to the bottom of the charging mechanism’s high-
torque anti-slip gear box. This combination sub-assembly is installed in the upper
left quadrant of the operator mechanism’s housing. Neither the charging mechanism
or the motor require any maintenance, beyond noted external lubrication points (see
recomended
maintnance lubrication pages
).
As soon as the closing spring performs its function and discharges – the charging
motor is energized and called on to operate via mechanism operated micro switches.
The Citadel breaker then recharges the closing spring after a closing operation.
Motors inherently have little ability to withstand
elevated voltages.
When performing ANY type of elevated voltage -
Insulation Resistance (IR) testing (AKA - Meggering,
hi-poting etc..) of Citadel breaker secondary circuitry –
ALWAYS disconnect the motor’s circuit leads to insure
no elevated voltages appear on the motor’s terminals.
It is the sole responsibility of the testing and
maintaining person(s) to properly reconnect motor
leads before breakers are placed back into service.
CAUTION
FIGURE 18
TABLE 8
Footnote: (1)
Current at nominal voltage
Spring charging time
≤ 12 s
Close time from energizing close coil at rated
control voltage to contact touch (last pole)
Up to 15.5 kV
≤ 56 ms
Opening time from energization
of trip coil at rated control
voltage to contact parting (last
pole), not including arcing time
5-cycle interrupting time (83 ms)
Up to 15.5 kV
≤ 66 ms
3-cycle interrupting time (50 ms)
Up to 15.5 kV
≤ 38 ms
TABLE 9
ANSI/IEEE C37.06 control voltages
Charging
time
Seconds
Nominal
Ohm’s
at 20
0
Spring charging motor (A)
Run
(Average)
1
Inrush
(Peak)
24 Vdc
3.7
16.0
45.0
10
48 Vdc
4.8
8.0
24.0
10
125 Vdc
6.7
4.0
16.0
10
250 Vdc
10.2
2.0
8.0
9
120 Vac
6.7
4.5
18.0
9
220 Vac
10.2
2.5
10.0
9
Never test motor
insulation with
applied voltages
above 700V
CAUTION
C I T A D E L C O N T R O L S
