Drive Isolation Transformers
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- Lawrence Cain
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1 Drive Isolation Transformers The Acme Drive Isolation Transformers are specifically designed to accommodate the special voltages and kva sizes unique to AC and DC motor drive applications.
2 DRIVE ISOLATION TRANSFORMERS The Acme Drive Isolation Transformers are specifically designed to accommodate the special voltages and kva sizes unique to AC and DC motor drive applications. Why use a Drive Isolation Transformer? Motor drives are popular because they are easy to control and help save energy. The basic motor drive uses a rectifier, made up of diode bridges or silicon controlled rectifiers (SCR), to convert AC to DC. In three-phase circuits, there is a brief moment when more than one SCR is on at the same time creating a momentary short. This short puts stress on the upstream transformer and causes a distorted voltage waveform, which can have a damaging effect on the transformer itself and electrical equipment connected to the circuit. What is a Drive Isolation Transformer? The Acme Drive Isolation Transformers are specifically designed to handle the mechanical stresses, voltage distortions, and harmonics associated with AC and DC variable speed drives. Acme s Drive Isolation Transformers maximize the power quality benefits gained from standard isolation transformers by: Preventing overheating due to harmonics Limiting harmonic peaks Increasing the ground fault tolerance of connected variable frequency drives Minimizing the transfer of inverter switching noise ACME ADVANTAGE Wound Cores and Strip Winding mean lower losses All Acme DITs above 7.5 kva are wound with strip windings to ensure the lowest possible eddy current losses. All our DITs 440 kva and larger use stacked core. This superior design has very low losses and quiet operation. Both of these features combine to significantly reduce losses and operating costs compared to other types of constructions. Copper terminations provide trouble-free operation All Acme DITs up to and including 0 kva have copper terminations. The transition from aluminum strip coil conductors to copper terminations is accomplished by a bonding process known as Koldwelding. This process has been used by Acme for over 5 years to provide a trouble-free, permanent bonding of the two metals. Stress relief Acme uses strip conductors (above 7.5 kva) instead of wire for a DIT series that easily accommodates the severe electrical and mechanical stresses found in today s AC & DC motor drives. The inherent excellent line isolation of these transformers is further enhanced with the extra protection of Acme s Electrostatic Shield free in all H.P. DIT s. kva Lower losses The harmonic currents generated by AC & DC drives increase eddy current losses (heat) in transformer windings. The thicker the winding conductor, the greater the losses. Acme uses one turn per layer of thin strip conductor which provides lower eddy current losses than comparable wire wound units. Lower losses = cooler operation and longer transformer life. Reduced short circuit forces Strip windings minimize axial short circuit forces that can cause mechanical displacement of the windings under fault conditions. For extra protection all designs 7.5 kva and above use primary and secondary coils of equal axial length. This feature tends to negate axial short circuit forces, further improving transformer life expectancy
3 Features n UL Type R Enclosures with Weather Shield on Ventilated Units (above 0 kva). Type Enclosure without weather shield. UL Listed and CSA certified kva are encapsulated, UL R. n -Phase 60 Hertz. n 80 C and 0 C insulation systems. n Encapsulated and ventilated designs. All ventilated units, are of strip wound construction. Acme s reinforced core assemblies enhance quiet operation. n Nominally 6% impedance. n Designed for use with AC, adjustable frequency or DC drives. n Full capacity taps are featured on all units. On 7.5 through 0 kva units, taps are -5% ANFC and -5% BNFC. On 7 through 880 kva units, taps are - / % ANFC and - / % BNFC. n Full range of kva ratings cover all standard drive systems. n Ample wiring compartment for easy cable entry. n Optional wall mounting brackets for certain sizes. kva 0V Delta 0Y/ Catalog Number Height Width Depth Weight (Lbs.)(Kg.) Mounting Type (Wall)(Floor) Weather Shield Dimension Drawing 7.5 DTFA7S (6) 5. (8.6) 9.5 (48.9) 7.7 (8.7) 80 (8.6) W NA F.0 DTFA0S 8.86 (48.0) 0.0 (5.6) 9.0 (.9) 65 (0.0) F NA I 4.0 DTFA04S 8.86 (48.0) 0.0 (5.6) 9.0 (.9) 65 (0.0) F NA I 0.0 DTFA00S 0.77 (5.8) 0.94 (5.) 0.8 (5.9) 45 (97.0) F NA I 7.0 DTFA074S (59) 5.48 (64.8) 4.9 (6.0) 9.40 (49.) 0 (7.0) F WSA E 4.0 DTFA044S 5.48 (64.8) 4.9 (6.0) 9.40 (49.) 0 (50.0) F WSA E 40.0 DTFA0404S 5.48 (64.8) 4.9 (6.0) 9.40 (49.) 70 (68.0) F WSA E 5.0 DTFA054S 9.40 (74.7) 8.5 (7.5).40 (56.9) 75 (70.0) F WSA E 6.0 DTFA064S 9.40 (74.7) 8.5 (7.5).40 (56.9) 495 (5.0) F WSA E 75.0 DTFA0754S 9.40 (74.7) 8.5 (7.5).40 (56.9) 55 (8.0) F WSA E 9.0 DTFA094S 5.40 (89.9).90 (8.0) 6.90 (68.) 685 (.0) F WSA E 8.0 DTFA084S 5.40 (89.9).90 (8.0) 6.90 (68.) 70 (.0) F WSA E 45.0 DTFA0454S 4.5 (05.5).90 (8.6) 9.90 (75.9) 980 (445.0) F WSA4 E 75.0 DTFA0754S 4.5 (05.5).90 (8.6) 9.90 (75.9) 0 (504.0) F WSA4 E 0.0 DTFA004S 4.5 (05.5).90 (8.6) 9.90 (75.9) 0 (508.0) F WSA4 E Optional wall mounting kits part # PL 799 Optional wall mounting kits part # PL 799 The number in ( ) s following the catalog number is the electrical wiring diagram number.
4 kva 460V Delta 0Y/ 460V Delta 460Y/66 Height Width Depth Weight (Lbs.)(Kg.) Mounting Type (Wall)(Floor) Weather Shield Dimension Drawing Catalog Number Catalog Number 7.5 DTGA7S (7) DTGB7S (4) 5. (8.6) 9.5 (48.9) 7.7 (8.7) 80 (8.6) W NA F.0 DTGA0S DTGB0S 8.86 (47.9) 0.0 (5.6) 9.0 (.9) 65 (0.0) F NA I 4.0 DTGA04S DTGB04S 8.86 (47.9) 0.0 (5.6) 9.0 (.9) 70 (.0) F NA I 0.0 DTGA00S DTGB00S 0.77 (5.8) 0.94 (5.) 0.8 (5.9) 45 (97.0) F NA I 7.0 DTGA074S (8) DTGB074S (5) 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 0 (45.0) F WSA E 4.0 DTGA044S DTGB044S 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 40 (54.0) F WSA E 40.0 DTGA0404S DTGB0404S 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 95 (79.0) F WSA E 5.0 DTGA054S DTGB054S 9.90 (75.9) 8.5 (7.5).7 (56.8) 400 (8.0) F WSA E 6.0 DTGA064S DTGB064S 9.90 (75.9) 8.5 (7.5).7 (56.8) 550 (50.0) F WSA E 75.0 DTGA0754S DTGB0754S 9.90 (75.9) 8.5 (7.5).7 (56.8) 570 (59.0) F WSA E 9.0 DTGA094S DTGB094S 5.90 (9.).90 (8.0) 6.88 (68.) 685 (.0) F WSA E 8.0 DTGA084S DTGB084S 5.90 (9.).90 (8.0) 6.88 (68.) 765 (47.0) F WSA E 45.0 DTGA0454S DTGB0454S 4.5 (05.5).90 (8.6) 9.88 (75.9) 990 (449.0) F WSA4 E 75.0 DTGA0754S DTGB0754S 4.5 (05.5).90 (8.6) 9.88 (75.9) 00 (499.0) F WSA4 E 0.0 DTGA004S DTGB004S 4.5 (05.5).90 (8.6) 9.88 (75.9) 0 (508.0) F WSA4 E 75.0 DTGA00754S DTGB00754S (5.8) 9.50 (00.) 5.50 (90.) 090 (948.0) F WSA5 E 0.0 DTGA004S DTGB004S (5.8) 9.50 (00.) 5.50 (90.) 090 (948.0) F WSA5 G DTGB04404S (46.9) (5.6) 4.49 (05.4) 95 (04.) F WSA7 G DTGB05504S (46.9) (5.6) 4.49 (05.4) 580 (7.7) F WSA7 G DTGB06604S 6.84 (59.6) (7.) 4.49 (05.4) 700 (678.) F WSA6 G DTGB07704S 6.84 (59.6) (7.) 4.49 (05.4) 4044 (88.) F WSA6 G DTGB008804S 6.84 (59.6) (7.) 4.49 (05.4) 40 (9.7) F WSA6 G DTGB990S 6.84 (59.6) (7.) 4.49 (05.4) 485 (947.7) F WSA6 G Optional wall mounting kits-part # PL799 Optional wall mounting kits-part # PL799 The number in ( ) s following the catalog number is the electrical wiring diagram number. 4
5 kva 575V Delta 0Y/ 575V Delta 460Y/66 Height Width Depth Weight (Lbs.)(Kg.) Mounting Type (Wall)(Floor) Weather Shield Dimension Drawing Catalog Number Catalog Number 7.5 DTHA7S (40) DTHB7S (4) 5. (8.6) 9.5 (48.9) 7.7 (8.7) 80 (8.6) W NA F.0 DTHA0S DTHB0S 8.86 (47.9) 0.0 (5.6) 9.0 (.9) 65 (0.0) F NA I 4.0 DTHA04S DTHB04S 8.86 (47.9) 0.0 (5.6) 9.0 (.9) 70 (.0) F NA I 0.0 DTHA00S DTHB00S 0.77 (5.8) 0.94 (5.) 0.8 (5.9) 45 (97.0) F NA I 7.0 DTHA074S (4) DTHB074S (44) 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 0 (45.0) F WSA E 4.0 DTHA044S DTHB044S 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 40 (54.0) F WSA E 40.0 DTHA0404S DTHB0404S 5.50 (64.8) 4.9 (6.9) 9.7 (49.) 95 (79.0) F WSA E 5.0 DTHA054S DTHB054S 9.90 (75.9) 8.5 (7.5).7 (56.8) 400 (8.0) F WSA E 6.0 DTHA064S DTHB064S 9.90 (75.9) 8.5 (7.5).7 (56.8) 550 (50.0) F WSA E 75.0 DTHA0754S DTHB754S 9.90 (75.9) 8.5 (7.5).7 (56.8) 570 (59.0) F WSA E 9.0 DTHA094S DTHB094S 5.90 (9.).90 (8.0) 6.88 (68.) 685 (.0) F WSA E 8.0 DTHA084S DTHB084S 5.90 (9.).90 (8.0) 6.88 (68.) 765 (47.0) F WSA E 45.0 DTHA0454S DTHB0454S 4.5 (05.5).90 (8.6) 9.88 (75.9) 990 (449.0) F WSA4 E 75.0 DTHB0754S 4.5 (05.5).90 (8.6) 9.88 (75.9) 00 (499.0) F WSA4 E 0.0 DTHB004S 4.5 (05.5).90 (8.6) 9.88 (75.9) 0 (508.0) F WSA4 E 75.0 DTHB00754S (5.8) 9.50 (00.) 5.50 (90.) 090 (948.0) F WSA5 E 0.0 DTHB004S (5.8) 9.50 (00.) 5.50 (90.) 090 (948.0) F WSA5 G DTHB04404S (57.5) (5.6) 4.49 (05.4) 580 (7.7) F WSA7 G DTHB05504S (57.5) (5.6) 4.49 (05.4) 640 (00.0) F WSA7 G DTHB006604S 6.84 (59.6) (7.) 4.49 (05.4) 700 (678.) F WSA6 G Optional wall mounting kits-part # PL799 Optional wall mounting kits-part # PL799 The number in ( ) s following the catalog number is the electrical wiring diagram number. 5
6 Windings, Terminals and Construction kva Winding Winding Insulation System Termination Enclosure Construction Core 7.5 CU wire CU wire 80 C CU wire Epoxy encapsulated Wound/distributed gap -0 AL foil AL foil 80 C CU wire Epoxy encapsulated Wound/distributed gap 7-0 AL foil AL foil 0 C CU bus Ventilated Wound/distributed gap 75-0 AL foil AL foil 0 C AL bus Ventilated Wound/distributed gap AL foil AL foil 0 C AL bus Ventilated Butt stacked/step lap 6
7 WIRING DIAGRAMS 4 PRIMARY: 460 Volts Delta SECONDARY: 460Y/66 Volts TAPS: -5% ANFC and BNFC H H 5 PRIMARY: 460 Volts Delta SECONDARY: 460Y/66 Volts TAPS: - /% ANFC and BNFC H H 7 PRIMARY: 460 Volts Delta SECONDARY: 0Y/ Volts TAPS: -5% ANFC and BNFC H H 8 PRIMARY: 460 Volts Delta SECONDARY: 0Y/ Volts TAPS: - /% ANFC and BNFC H H , X, X 66 & X & X & X X , X, X 66 & X & X & X X , X, X & X & X & X X , X, X & X & X & X X 40 PRIMARY: 575 Volts Delta SECONDARY: 0Y/ Volts TAPS: -5% ANFC and BNFC 4 PRIMARY: 575 Volts Delta SECONDARY: 0Y/ Volts TAPS: - /% ANFC and BNFC 4 PRIMARY: 575 Volts Delta SECONDARY: 460Y/66 Volts TAPS: -5% ANFC and BNFC 44 PRIMARY: 575 Volts Delta SECONDARY: 460Y/66 Volts TAPS: - /% ANFC and BNFC H H H H H H H H , X, X & X & X & X X , X, X X & X & X & X , X, X 66 & X & X & X X , X, X 66 & X & X & X X 59 PRIMARY: 0 Volts Delta SECONDARY: 0Y/ Volts TAPS: - /% ANFC and - /% BNFC 6 PRIMARY: 0 Volts Delta SECONDARY: 0Y/ Volts TAPS: -5% ANFC and -5% BNFC H H H H , X, X & X & X & X X , X, X & X & X & X X DIMENSION DRAWING D D D D H H H H W W W W Design E Design F Design G Design I 7
8 N85 W545 Westbrook Crossing Menomonee Falls, WI hubbell-acmeelectric.com Hubbell Canada Inc Hubbell de Mexico, S.A. de C.V ACM_BRO_00_06
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