Cutler-HammerJanuary 2001Vol. 1, Ref. No. [0329]
TransformersDrive Isolation TransformersThree-Phase, Type MD, 60 Hz
Table 9-53. Drive isolation Transformers
HP kVA Full Cap. Taps
FCAN FCBN
Type °CTemp.Rise
Dimensions (Inches)
H W D
Wt.Lbs.
Dimensions (mm)
H W D
Wt.Kg
Frame WiringDiagramNumber
Weathershield
CatalogNumber
PriceU.S.S
CatalogNumber
PriceU.S.S
208 A Volts to 460Y/266 Volts
57.510
152025
304050
6075100
125150200
250300
7.51114
202734
405163
7593118
145175220
275330
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3
150150150
150150150
150150150
150150150
150150150
150150
252525
30-1/830-1/830-1/8
30-1/839-3/839-3/8
39-3/839-3/846-1/8
46-1/85656
5675
20-1/820-1/820-1/8
20-1/820-1/820-1/8
20-1/826-1/826-1/8
26-1/826-1/828
2831-1/431-1/4
31-1/444-1/2
14-1/814-1/814-1/8
14-1/814-1/814-1/8
14-1/819-1/819-1/8
19-1/819-1/823
2324-1/424-1/4
24-1/436
152152152
230230310
310480480
480600760
76011001200
13002200
635635635
765765765
76510001000
100010001171
117114221422
14221905
511511511
511511511
511663663
663663712
712793793
7931130
358358358
358358358
358485485
485485585
585616616
616914
696969
104104140
140217217
217272344
344499499
5891000
909909909
910A910A91 2A
912A914B914B
914B915B916A
916A917917
918919
286S286S286S
286S286S286S
286S286S286S
286S286S286S
286S286S286S
286S©
WS31WS31WS31
WS31WS31WS31
WS31WS33WS33
WS33WS33WS19
WS19WS34WS34
WS34WS35
303.303.303.
303.303.303.
303.303.303.
303.303.303.
303.688.688.
688.1,175.
MD075E86MD11E86MD14E86
MD20E86MD27E86MD34E86
MD40E86MD51E86MD63E86
MD75E86MD93E86MD118E86
MD145E86MD175E86MD220E86
MD275E86MD330E86
1,560.1,715.1,995.
2,115.2,640.3,295.
3,575.4,065.4,915.
5,330.5,680.7,105.
7,920.12,045.14,215.
16,620.17,615.
230 A Volts to 230Y/133 Volts
57.510
152025
304050
6075100
125150200
250300400
500600700800
7.51114
202734
405163
7593118
145175220
275330440
550660770880
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%
1-5%1-5%1-5%1-5%
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3
DT-3DT-3DT-3DT-3
150150150
150150150
150150150
150150150
150150150
150150150
150150150150
252525
30-1/830-1/830-1/8
30-1/839-3/839-3/8
39-3/839-3/846-1/8
46-1/85656
5675©
00
00
20-1/820-1/820-1/8
20-1/820-1/820-1/8
20-1/826-1/826-1/8
26-1/826-1/828
2831-1/431-1/4
31-1/444-1/2©
00
00
14-1/814-1/814-1/8
14-1/814-1/814-1/8
14-1/819-1/819-1/8
19-1/819-1/823
2324-1/424-1/4
24-1/436®
©0
0©
152152152
230230310
310480480
480600760
76011001200
13002200©
©0
0©
635635635
765765765
76510001000
100010001171
117114221422
14221905©
©0
0©
511511511
511511511
511663663
663663712
712793793
7931130©
©0
©©
358358358
358358358
358485485
485485585
585616616
616914©
©@
©0
696969
104104140
140217217
217272344
344499499
5891000©
©©
©0
909909909
910A91 OA912A
91 2A914B914B
914B915B916A
916A917917
918919©
0©
©©
286A286A286A
286A286A286A
286A286A286A
286A286A286A
286A286A286A
286A©©
©Q
©©
WS31WS31WS31
WS31WS31WS31
WS31WS33WS33
WS33WS33WS19
WS19WS34WS34
WS34WS35©
©0
©©
303.303.303.
303.303.303.
303.303.303.
303.303.303.
303.688.688.
688.1,175.
—
MD075E88MD11E88MD14E88
MD20E88MD27E88MD34E88
MD40E88MD51E88MD63E88
MD75E88MD93E88MD118E88
MD145E88MD175E88MD220E88
MD275E88MD330E88MD440E88
MD550E88MD660E88MD770E88MD880E88
1,560.1,715.1,995.
2,115.2,640.3,295.
3,575.4,065.4,915.
5,330.5,680.7,105.
7,920.9,850.
11,630.
13,440.14,260.20,305.
36,830.65,350.80,900.93,000.
© Refer to your Cutler-Hammer sales office.
'. • <•>' r,.r:' i?/(}i--fy. ip t'fyf.cK HI >':K-V«',X p| |Si !
Discount Symbol DT-1
CAT.200.01.T.E For more information contact Cutler-Hammer: www.ch.cutler-hammer.com/catalog IT Y.BI
Cutler-HammerJanuary 2001Vol. 1,Ref. No. [0327]
TransformersDrive Isolation TransformersThree-Phase, Type MD, 60 Hz
Three-Phase, Type MD, 60 Hz
Type MD
m Suitable for indoor or outdoorapplications (with weathershield)
m Ventilated enclosuresm 220°C Insulation system, 150°C Rise
standard (self extinguishing)H Available in ratings from
7.5 through 1500kVA
Application DescriptionDrive isolation transformers are specif-ically designed for use with AC and DCadjustable speed drives. Two windingdrive isolation transformers provide:
• Electrical isolation between theincoming line and the drive circuitry
m Voltage conversion of input line tostandard drive input voltages
m Minimized line disturbances causedby SCR (silicon controlled rectifiers)firing
• Reduced short circuit currents andvoltage line transients
Drive isolation transformers are specif-ically sized to the drive kVA require-ments and are braced to withstand themechanical stresses of current rever-sals and short circuits associated withSCR drives.
Features, Benefitsand Functions• UL Listed• 60 Hz operation
(50/60 Hz operation available)m Short-term overload capability as
required by ANSI3 Primary and secondary terminals
are front accessible for fast and easyconnection
H Slotted screw mounting holes inenclosure and cover reduce installa-tion time
m Sound dampening pads, whichisolate the core and coil from thecase, reduce noise levels to meetNEMA ST-20
m Core laminations of precisionsheared grain oriented silicon steelare hand stacked to insure quietoperation
• Terminations are clearly marked foreasy identification
m Three-phase transformers have one5% full capacity tap above andbelow nominal voltage for incomingsource adjustment
• Units are suitable for continuousoperation in a 40°C ambient maximum
H Full current neutrala Thermoguard protection embedded
in coils to indicate that high temper-atures (approximately 190°C) arepresent. Three-phase transformershave three thermoguards.
H Three coil delta-wye configurationsare used throughout the product line.
Standards and Certificationsm ANSI C89.2m NEMA ST-20m UL506• UL1561
Seismic QualifiedAll Cutler-Hammer dry type distributiontransformers are seismically qualified,and exceed requirements of theUniform Building Code (UBC) andCalifornia Code Title 24.
Options and Accessoriesm Copper windingsm Non-standard voltagesm 50/60 Hz designsm Delta-delta configurationH 80°C or 115°C rise designsm Totally enclosed non-ventilatedm Special impedances for certain
regenerative drive applicationsH Electrostatic shields
Please refer to Page 9-112.
Cutler-Hammer standard dry typedistribution transformers are designedfor 60 Hertz operation. Transformersrequired for other frequencies areavailable and must be specificallydesigned.
Overload Capability
Short-term overload is designed intotransformers as required by ANSI.Dry type distribution transformerswill deliver 200% nameplate load forone-half hour; 150% load for one-hour;and 125% load for four-hours withoutbeing damaged provided that a con-stant 50% load precedes and followsthe overload. See ANSI C57.96-01.250for additional limitations.
Continuous overload capacity is notdeliberately designed into a trans-former because the design objective isto be within the allowed winding tem-perature rise with nameplate loading.
Insulation System and Temperature Rise
Industry standards classify insulationsystems and rise as shown below:
Table 9-50. Insulation System ClassificationAmbient
40°C40°C40°C40°C
+WindingRise
55°C80°C115°C150°C
+HotSpot
10°C30°C30°C30°C
—Temp.Class
105°C150°C185°C220°C
The design life of transformers havingdifferent insulation systems is thesame — the lower temperature systemsare designed for the same life as thehigher temperature systems.
CAT.200.01.T.E For more information contact Cutler-Hammer: www.ch.cutier-hammer.com/catalog B'T.M
TransformersDrive Isolation TransformersThree-Phase, Type MD, 60 Hz
Cutler-HammerJanuary 2001
Vol. 1, Ref. No. [0328]
EnclosuresCutler-Hammer ventilated transformers,Type MD, utilize a NEMA 2 rated(drip-proof) enclosure as standard,and are rated NEMA 3R with the addi-tion of weathershields.
Sound LevelsAll Cutler-Hammer 600 volt classgenera! purpose dry type distributiontransformers are designed to meetNEMA ST-20 levels listed here.
Table 9-51. Sound LevelskVA
0-910-5051-150151-300
301-500501-700701 - 10001001-1500
NEMA Average ®Sound Level in dB
40455055
60626465
® Applies to general purpose transformers only.
Product SelectionAdditional Product Selection information begins on Page 9-120.
Table 9-52. Drive Isolation Transformers
Winding TerminationsPrimary and secondary windings areterminated in the wiring compartment.Ventilated transformers have leadsbrought out to aluminum pads that arepre-drilled to accept Cu/AI lugs. Lugs arenot supplied with these transformers.Cutler-Hammer recommends externalcables be rated 75°C for ventilateddesigns.
Technical Dataand SpecificationsPlease refer to Page 9-114.
HP kVA Full Cap. Taps
FCAN FCBN
Type °CTemp.Rise
Dimensions (Inches)
H W D
Wt.Lbs.
Dimensions (mm)
H W D
Wt.Kg
Frame WiringDiagramNumber
Weathershield
CatalogNumber
PriceU.S.S
CatalogNumber
PriceU.S.S
208 A Volts to 230Y/133 Volts
57.510
152025
304050
6075100
125150200
250300
7.51114
202734
405163
7593118
145175220
275330
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
1-5%
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
DT-3
150150150
150150150
150150150
150150150
150150150
150150
252525
30-1/830-1/830-1/8
30-1/839-3/839-3/8
39-3/839-3/846-1/8
46-1/85656
5675
20-1/820-1/820-1/8
20-1/820-1/820-1/8
20-1/826-1/826-1/8
26-1/826-1/828
2831-1/431-1/4
31-1/444-1/2
14-1/814-1/814-1/8
14-1/814-1/814-1/8
14-1/819-1/819-1/8
19-1/819-1/823
2324-1/424-1/4
24-1/436
152152152
230230310
310480480
480600760
7601100
1200
1300
2200
635635635
765765765
7651000
1000
1000
1000
1171
1171
1422
1422
1422
1905
511511511
511511511
511663663
663663712
712793793
7931130
358358358
358358358
358485485
485485585
585616616
616914
696969
104104140
140217217
217272344
344499499
5891000
909909909
910A
910A
912A
912A
914B
914B
914B
915B
916A
916A
917917
918919
286L286L286L
286L286L286L
286L286L286L
286L286L286L
286L286L
[286L
286L®
WS31
WS31
WS31
WS31
WS31
WS31
WS31
WS33WS33
WS33WS33WS19
WS19
WS34WS34
WS34WS35
303.
303.
303.
303.
303.
303.
303.
303.
303.
303.
303.
303.
303.
688.
688.
688.
1,175.
MD075E85MD11E85MD14E85
MD20E85MD27E85MD34E85
MD40E85MD51E85MD63E85
MD75E85MD93E85MD118E85
MD145E85MD175E85MD220E85
MD275E85MD330E85
1,560.1,715.1,995.
2,115.2,640.3,295.
3,575.4,065.4,915.
5,330.5,680.7,105.
7,920.12,045.14,215.
16,620.17,615.
® Refer to your Cutler-Hammer sales office.
•I . : ; ! HY \'•.:•<• •::"•'• <•.;'•••f^: (• ::.,> HV;.., I,M, : : • : :
i^sfci W-;^ :,:•»;& %- x-S;, fis*J^:;j:S->V .
• I -\.fe: || • - ' f&V-S-feiJW-V. (H Discount Symbol DT-1
EiT« For more information contact Cutler-Hammer: www.ch.cutler-hammer.com/catalog CAT.200.01.T.E
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