Control Devices And Voltages - GE PVDB-28kV Instructions Manual

Distribution Breaker -Sectiofl.l Electrical Checks -
7-1 Contro/Power
After the breaker has been operated several times with
the manual charging lever and the mechanism
adjustments are checked as described, the closed circuit
operating voltages should be checked at the close coil,
trip coil, and motor terminals. Control power for
electrical operation of the breaker maybe from either an
alternating or direct current source. The operating
ranges for the closing and tripping voltages as given on
the breaker namep)ate, are as follows:
7-2 Timing
Timing maybe checked by monitoring control circuit
voltage and using no more than six volts DC and one
ampere through the vacuum interrupter contact to
indicate closed or open condition. Typical time ranges
vary with coil voltage but nominal values are:
Initiation of trip signal to contact parting
35-45 Milliseconds (5 cycle)
25-30 Milliseconds (3 cycle)
Rated
Nominal
Voltage
Trip
Circuit
Min. Max.
Initiation of close signal to contact closing
45-75 Milliseconds (DC voltages)
35-65 Milliseconds (AC voltages)
Close or
Motor Circuit
M in. Max.
48 DC
125 DC
250 DC
38
90
180
56
140
280
28
70
140
56
140
280
Timing can be accomplished by most travel recorders.
In some cases, additional linkage and a transducer are
required. See Figure 18. This is available from GE. See
Renewal Parts Manual.
120 AC
240 AC
104
208
127
254
Cap trip req'd
Cap trip req'd
208-254
Trip-free operation may be checked by applying a
simultaneous close and trip signal and a minimum re-
close operation may be checked by tripping a charged
breaker open while maintaining a close signal.
Instantaneous re-close time* 100-150 Milliseconds
If the closed circuit voltage at the tenninals of the coil or
motor does not fall in the specified range, check the
voltage at the source of power and line drop between the
power source and breaker.
*Time from application of trip signal and close
signal until breaker opens and re-closes.
When two or more breakers operate from the same
control power source are required to close simul-
taneously, the closed circuit voltage at the closing coil or
motor of each breaker must fall within the specified
limits.
7-3 Opening and Closing Speed
The opening speed is modified by moving the speed
adjusting nuts on the opening spring assemblies. A
change in the opening speed affects the closing speed.
Refer to Figure 17.
The
operating speeds are as follows:
O~eration Feet Per Second
Open 5.0 nominal, 4.5 minimum
Close 3.5 nominal, 4.0 maximum
Table 1. Control Devices and Voltages
Nominal
Control
Voltage
48 VDC
125 VDC
250 VDC
120 VAG
Ch~ge Motor
Close Coil
Part No.
0177C5050GOO6
0177C5050GOO4
0177C5050GOO5
0177C5050GOO4
Range
36-56
90-140
180-280
104-127
Part No.
0209B8103GOO8
0209B8103GOO9
0209B8103GO10
0209B8103GO11*
Range
36-56
90-140
180-280
104-127
Range I
28-56 I
70-140 I
140-280 I
(Cap. trip) I
(Cap. trip)
208-254
Part No.
(5 cycle)
0209B8104GOO1
.
0209B8104GOO2
0209B8104GOO3
0209B8104GOO4
Trip Coil
Part No.
(3 cycle)
0282A8104GOO1
0282A8104GOO7
02828104GOO6
020988104GOO4
240 VAC
0177C5050GOO5
0-
208-254
0209B103GO12* 208-254
0209B8104GOO4
0209B8104GOO4
* With rectifier
20