PowlVac® Circuit Breakers
ANSI CIRCUIT BREAKERS FOR ALL POWLVAC SWITCHGEAR 5kV THROUGH 38kV
NEW STANDARDS
The ANSI standards have evolved from the 1945 revision
when breakers were rated based on interrupting MVA.
In 1964 the standards established varying K factors to
adjust interrupting rating as a function of the voltage.
The K factor reflects the performance of the oil and air
interrupting technologies available at that time.
CONSTANT INTERRUPTING RATING
This practice ended with the 1999 change, where circuit
breaker K factors were all set at a value of one. The K
factor of 1.0 results in all medium voltage breakers,
tested to ANSI standard C37.09, having a constant
interrupting rating irrespective of nominal system
voltage.
DESIGNS TO MEET ANY REQUIREMENT
K Factor = 1.0 for constant interrupting
rating
Tested for 10,000 operations
Low Maintenance Current Transfer
Fits Into Existing PowlVac © Switchgear
2 Second Short-Time
UL and C-UL Listed
Wide variety of racking options
• Type STD - Standard - 5kV and 15kV standard design
which requires an open cubicle door to rack the
circuit breaker between the test, connected and
disconnected positions.
• Type ND - Narrow Design - 26” wide standard design
for use in PowlVac-ND® switchgear and provides the
ability to rack the circuit breaker between the test,
connected and disconnected positions with the
cubicle door closed.
• Type CDR - Closed Door Racking - 5kV and 15kV
designs which provides the ability to rack the circuit
breaker between the test, connected and
disconnected positions with the cubicle door closed.
• Type CDA - Closed Door Automatic - 5kV and 15kV
designs which combines the telescopic racking arm
and front mounted secondary disconnect slider in lieu
of the secondary umbilical.
• Type CDS - Closed Door Standard - 5kV through
38kV designs which allows the ability to rack the
circuit breaker with the door closed.
• Type ARM - Automatic Racking Mechanism - 5kV
through 38kV designs and is the latest and most
advanced version on the market. A breaker mounted
motor racks the breaker by remote command.
Powered by Safety®
Standard Design PowlVac® and PowlVac-AR® (36” wide) - Types STD, CDR, CDA and ARM
15kV
5kV
Breaker
Type
05PV36STD
05PV36CDR
05PV36CDA
05PV36ARM
05PV50STD
05PV50CDR
05PV50CDA
05PV50ARM
05PV63STD
05PV63CDR
05PV63CDA
05PV63ARM
15PV25STD
15PV25CDR
15PV25CDA
15PV25ARM
15PV36STD
15PV36CDR
15PV36CDA
15PV36ARM
15PV50STD
15PV50CDR
15PV50CDA
15PV50ARM
15PV63STD
15PV63CDR
15PV63CDA
15PV63ARM
15PV63STA(e)
Cell Width
(in/mm)
Maximum
Voltage
(kV)
Nominal
Voltage
(kV)
Symmetrical
Interrupting
Rating
(kA rms)
(a)
Obsolete
MVA Rating
Continuous
Current
(A rms)
(b)
Power
Frequency
Withstand
(kV)
BIL Crest
(kV)
Momentary
Close &
Latch
Rating
(kA Crest)
% DC
Interrupting
Current
(c)
Rated
Interrupting
Time
(cycle/msec)
(c)
Short Time
Current
2 sec
(kA)
Back to Back
Capacitor
Switching
(A)
(d)
36/914
4.76
4.16
36
250
1200, 2000,
3000, 4000
19
60
94
50
3/50
36
1800
36/914
4.76
4.16
50
350
1200, 2000,
3000, 4000
19
60
130
50
3/50
50
1800
36/914
4.76
4.16
63
-
1200, 2000,
3000, 4000
19
60
164
50
3/50
63
1800
36/914
15.0
13.8
25
500
1200, 2000,
3000, 4000
36
95
65
50
3/50
25
1800
36/914
15.0
13.8
36
750
1200, 2000,
3000, 4000
36
95
94
50
3/50
36
1800
36/914
15.0
13.8
50
1000
1200, 2000,
3000, 4000
36
95
130
50
3/50
50
1800
36/914
15.0
13.8
63
-
1200, 2000,
3000, 4000
36
95
164
50
3/50
63
1800
48/1219
15.0
13.8
63
-
5000(e)
36
95
173
78
3/50
63 @1 sec
1800
5kV
(Narrow Design) PowlVac-ND® and PowlVac ND-AR® (26” wide) - Type ND
Breaker
Type
Cell Width
(in/mm)
Maximum
Voltage
(kV)
Nominal
Voltage
(kV)
Symmetrical
Interrupting
Rating
(kA rms)
(a)
Obsolete
MVA Rating
Continuous
Current
(A rms)
(b)
Power
Frequency
Withstand
(kV)
BIL Crest
(kV)
Momentary
Close &
Latch
Rating
(kA Crest)
% DC
Interrupting
Current
(c)
Rated
Interrupting
Time
(cycle/msec)
(c)
Short Time
Current
2 sec
(kA)
Back to Back
Capacitor
Switching
(A)
(d)
05PV36SND
26/660
4.76
4.16
36
250
1200, 2000
19
60
94
50
3/50
36
-
05PV50SND
26/660
4.76
4.16
50
350
1200, 2000
19
60
130
50
3/50
50
-
Breaker
Type
Cell Width
(in/mm)
Maximum
Voltage
(kV)
Nominal
Voltage
(kV)
Symmetrical
Interrupting
Rating
(kA rms)
(a)
Obsolete
MVA Rating
Continuous
Current
(A rms)
(b)
Power
Frequency
Withstand
(kV)
BIL Crest
(kV)
Momentary
Close &
Latch
Rating
(kA Crest)
% DC
Interrupting
Current
(c)
Rated
Interrupting
Time
(cycle/msec)
(c)
Short Time
Current
2 sec
(kA)
Back to Back
Capacitor
Switching
(A)
(d)
27PV25CDS
27PV25ARM
40/1016
27.0
23.0
25
-
1200/2000
60
125
65
50
3/50
25
-
27PV25CDS
54/1372
27.0
23.0
25
-
3000
60
125
65
50
3/50
25
-
27PV40CDS
27PV40ARM
40/1016
27.0
23.0
40
-
1200/2000
60
125
104
50
3/50
40
430
27PV40CDS
54/1372
27.0
23.0
40
-
3000
60
125
104
50
3/50
40
430
38PV40CDS
38PV40ARM
40/1016
38.0
34.5
40
-
1200, 2000
80
150
104
50
3/50
40
430
38PV40CDS
54/1372
38.0
34.5
40
-
3000
80
150
104
50
3/50
40
430
38kV
27kV
PowlVac 38™ and PowlVac 38-AR™ (40” / 54”wide) - Type CDS and ARM
(a) Interrupting current constant for all voltages less than the maximum voltage. Rated voltage range K Factor = 1.0.
(b) Forced air cooling fans required for currents in excess of 3000A in 36” wide switchgear.
(c) 5 cycle breakers available at the same % DC ratings.
(d) Back to back capacitor switching rating is applicable for 1200, 2000, 3000, and 4000 continuous current ratings. For 1200A circuit breakers the continuous current limits the capacitor switching current.
(e) 5000A stationary mounted generator circuit breaker and is 54” wide.
Powered by Safety®
Publication No. 06057
Powell Electrical Systems, Inc.
8550 Mosley Road
Houston, Texas 77075
713.944.6900
Powell Canada Inc.
53032 Range Road 263A
Acheson, Alberta T7X 5A5
780.948.3300
Powell (UK) Ltd.
Ripley Road
Bradford, West Yorkshire BD4 7EH
+44.(0).1274.734221
11/2014 v7
powellind.com
info@powellind.com
©2014 Powell Industries, Inc.. all rights reserved.