27 kV MASTERCLAD® Medium
Voltage Metal-Clad Switchgear with
Type VR Vacuum Circuit Breakers
Class 6055
CONTENTS
Description
Page
Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Product Description
RATINGS
•
•
•
•
•
•
16.5 to 27 kV
1200-2000 Amperes Continuous Ratings
16, 25 and 40 kA Symmetrical Interrupting Capacity
125 kV BIL, peak (impulse) dielectric withstand
60 kV, rms 1 minute 60 Hz dielectric withstand
NEMA Type 1 – Indoor enclosure
APPLICATIONS AND STANDARDS
MASTERCLAD® medium voltage metal-clad switchgear is used in a wide
variety of switching, control and protective applications including electric
utility generation and distribution systems, industrial plants, commercial
buildings, hospitals, municipal pumping stations, wastewater treatment
plants, transportation systems and pipeline stations.
MASTERCLAD offers a standard two-high breaker arrangement,
incorporating a series of basic modular units, control packages and
instrumentation that can be assembled in combinations as needed to satisfy
user application requirements.
MASTERCLAD switchgear with VR circuit breakers meets or exceeds the
design standards of ANSI, IEEE, NEMA and IEC. The switchgear is tested in
accordance with both ANSI C37.20.2 and IEC 298. The VR circuit breakers
are tested per ANSI C37.09 and IEC 56.
STANDARD FEATURES
Metal-Clad Switchgear as defined by ANSI C37.20.2 includes:
•
•
•
•
•
•
•
•
•
Removable (Drawout) Circuit Breaker
Fully Compartmented Construction
Grounded Metal Barriers enclose all live parts
Automatic Shutters over primary contacts
Fluidized-Bed Epoxy Insulated Bus
Mechanical Interlocks
Disconnect Type Voltage Transformers
Fixed Control Power Transformer with Drawout Primary Fuses
Grounded Breaker Truck in and between Test-Disconnected and
Connected Positions
• Low Voltage Instrument/Control Compartment isolated from primary
voltage areas
2
© 2000 Schneider Electric All Rights Reserved
1/00
Dimensions
27 kV LAYOUT DIMENSIONS/CONFIGURATION GUIDE
Vertical sections are 36” wide
1.75
95.12
(44)
(242)
1.75
95.12
(44)
(242)
36.35
36.35
(923)
(923)
1.00
(25)
58.25
1.00
16.06
(1480)
(25)
(408)
58.25
16.06
(1480)
(408)
110.50
110.50
(2807)
(2807)
AUX VT/Circuit Breaker Section
1200/2000 A, 2000/1200 A Circuit Breaker Section
1.75
95.12
(44)
(242)
95.12
(242)
Bus to
Incoming
Line
36.35
(923)
1.00
(25)
58.25
16.06
(1480)
(408)
.80
(20)
110.50
58.25
(1480)
110.50
(2807)
(2807)
Blank/Circuit Breaker Section
95.12
AUX VT/AUX VT Section
95.12
(242)
(242)
Bus to
Incoming
Line
1.00
(25)
110.50
58.25
(2807)
(1480)
110.50
AUX CPT Section
(2807)
Blank/AUX Section
Dimensions are in inches (millimeters).
3
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© 2000 Schneider Electric All Rights Reserved
Ratings
VR 27 kV Vacuum Circuit Breakers Rating Table on Symmetrical Current Rating Basis
Description
Preferred Ratings per ANSI C37.06-1997 q
Insulation Level
Rated Withstand Rated
PermisRated
VoltInterImpulse sible
Max.
age
rupting Low
1.2 x
Tripping
Voltage Range
Time
Freq. 50 µs
Delay
kV rms Factor k Cycles kV
kV
Y
rms
Crest
Sec.
a
Rated Transient
Current Values
Recovery Voltage
Circuit
Breaker
Catalog
Number
Rated
Rated
Short
(Ref.)
Cont.
Circuit
Three
Current Current
Phase
60 Hz
(at rated
MVA
A rms
Max. kV)
kA rms
Rated
Crest
Voltage
E2
kV
Crest
Rated
Time to
Crest
T2
MicroSec
Maximum
Sym.
Interrupting
Capability
kA rms
3 Sec.
ShortTime
Current
Carrying
Capability
kA rms
Close
and
Latch
Rating
Momentary
kA
Crest f
VR2701612
750
1200
16
27
1.0
3
60
125
2
51
105
16
16
43
VR2701620
750
2000
16
27
1.0
3
60
125
2
51
105
16
16
43
VR2702512
1250
1200
25
27
1.0
3
60
125
2
51
105
25
25
68
VR2702520
1250
2000
25
27
1.0
3
60
125
2
51
105
25
25
68
VR2704012
2000
1200
40
27
1.0
3
60
125
2
51
105
40
40
108
VR2704020
2000
2000
40
27
1.0
3
60
125
2
51
105
40
40
108
q
a
f
Also tested per IEC 56
These values apply with circuit breaker in or out of enclosure.
Close and Latch Rating (Momentary) Amperes rms = 2.7 k (Rated Short Circuit Current)
Breaker Identification
36.00
4.50
27.00
(114)
4.50
(686)
(914)
Rear
Aisle
8.00
(203)
20.00
(508)
(114)
8.00
VR
27
025
12
3.50
(203)
(89)
Continuous Current Rating
Top Breaker Below
Bottom Circuit Breaker Above
(Conduit Area)
kA Rating
9.00
Voltage Rating
(229)
53.30
(279)
28.00
4.00
(711)
(102)
Circuit Breaker Type
11.00
(1354) 1.00
(25)
4.00
(102)
Top Breaker Above
Bottom Circuit Breaker Below
(Conduit Area)
110.50
Weight (Approximate)
Section (less circuit breaker)
2600 lbs. (1179 kgs.)
(2807)
(6) .75 Dia.
Mounting Holes
1200 A circuit breaker
600 lbs. (272 kgs.)
2000 A circuit breaker
630 lbs. (286 kgs.)
Recommended
4.00 Mounting Channels
(3) Places
(By Customer)
54.70
(1389)
Control Conduit Area
(Bottom)
8.00
(203)
1.00
2.00
(51)
(25)
Door
1.75
8.00
(44)
(203)
1.50 2.50
72.00 (38)
(64)
64.00
(23)
(1829)
Front Aisle
(1626)
(Minimum)
34.20
(869)
.90
2.00
.90
(561)
(23)
36.00
(914)
NOT FOR CONSTRUCTION
Typical Indoor 1200/2000 A
Floor Plan
2.50
(64)
Control Conduit Area
(Top)
Dimensions are in inches (millimeters).
Square D Company
330 Weakley Road
Smyrna, TN 37167
615-459-5026
1-888 Square D (1-888-778-2733)
www.squared.com
Catalog No. 6055CT9901 January 2000