Auto-Transformer defined: A transformer which has only one winding per phase, part of which is common to both primary and secondary circuits. Using an Auto-Transformer is an economical and compact means of connecting electrical equipment to a power supply or a different voltage. Part of the winding is common to both primary and secondary circuits so there is no isolation between the two. This may be acceptable on some power systems that do not have a grounded neutral on the secondary side of the main power transformer. Typical applications include motor loads of industrial machinery, electric heating, air conditioners, etc.

• Performs the same function as an isolation transformer of same KVA and voltage rating without the isolation feature
• Ventilated openings in the enclosure are coordinated with the cooling ducts in the coils to ensure proper natural circulation of air for long life and minimum losses.
• General purpose indoor ventilated steel enclosure (Nema-1 or CSA-1) suitable for dry locations. After fabrication, the enclosure is finished in ASA61 gray powder paint suitable for most industrial and commercial installations.
• Transformers up to size #7 enclosure may be readily hung on H-columns, walls, shelves or floor mounted to suite each typical installation. Most units have lifting lugs, conduit knockouts and removable front and back covers for easy access to terminals. Transformers in size #8 enclosure and above are supplied with brackets suitable for floor or platform mounting only.
• Transformer terminations rated below 330A are supplied with suitable hardware and lugs for cable connection. Terminations above 330A are supplied with termination pads.
• Generally quieter than the equivalent isolation transformer
• May be used in either step-up or step-down configuration
• Low regulation (typically less than 3%)
  • Class 220 Insulation
  • CSA certified, File No. LR34493
  • UL Listed, File No. E108255
  • ISO9001 Quality Certification
  • Available in Copper Windings

 

	600/480 Volts				600/240 Volts				240/208 Volts
Typical Sizes	Part Numbers	Enclosure Size	Approx. Weight		Part Numbers	Enclosure Size	Approx. Weight		Part Numbers	Enclosure Size	Approx. Weight
3KVA	RC3JH	#0	21LBS		RC3JC	#1	40LBS		RC3CB	#0	18LBS
6KVA	RC6JH	#1	34LBS		RC6JC	#1	75LBS		RC6CB	#0	21LBS
9KVA	RC9JH	#1	45LBS		RC9JC	#3	120LBS		RC9CB	#1	30LBS
15KVA	RC15JH	#1	65LBS		RC15JC	#3	155LBS		RC15CB	#1	52LBS
30KVA	RC30JH	#3	115LBS		RC30JC	#5	225LBS		RC30CB	#3	70LBS
45KVA	RC45JH	#3	135LBS		RC45JC	#6	265LBS		RC45CB	#3	125LBS
75KVA	RC75JH	#5	200LBS		RC75JC	#6	400LBS		RC75CB	#5	135LBS
112½KVA	RC112JH	#6	225LBS		RC112JC	#7	550LBS		RC112CB	#5	180LBS
150KVA	RC150JH	#6	265KBS		RC150JC	#7	610LBS		RC150CB	#6	200LBS
225KVA	RC225JH	#7	450LBS		RC225JC	#8	970LBS		RC225CB	#6	240LBS
300KVA	RC300JH	#7	525LBS		RC300JC	#9	1300LBS		RC300CB	#7	300LBS

 

	600/208 Volts				480/240 Volts				480/208 Volts
Typical Sizes	Part Numbers	Enclosure Size	Approx. Weight		Part Numbers	Enclosure Size	Approx. Weight		Part Numbers	Enclosure Size	Approx. Weight
3KVA	RC3JB	#1	45LBS		RC3HC	#1	65LBS		RC3HB	#1	65LBS
6KVA	RC6JB	#1	70LBS		RC6HC	#1	85LBS		RC6HB	#1	85LBS
9KVA	RC9JB	#3	130LBS		RC9HC	#3	110LBS		RC9HB	#3	110LBS
15KVA	RC15JB	#3	130LBS		RC15HC	#3	125LBS		RC15HB	#3	130LBS
30KVA	RC30JB	#5	210LBS		RC30HC	#5	200LBS		RC30HB	#5	200LBS
45KVA	RC45JB	#6	250LBS		RC45HC	#5	225LBS		RC45HB	#5	225LBS
75KVA	RC75JB	#6	360LBS		RC75HC	#6	325LBS		RC75HB	#6	325LBS
112½KVA	RC112JB	#7	555LBS		RC112HC	#7	450LBS		RC112HB	#7	450LBS
150KVA	RC150JB	#8	650KBS		RC150HC	#7	550LBS		RC150HB	#7	550LBS
225KVA	RC225JB	#8	920LBS		RC225HC	#8	675LBS		RC225HB	#8	675LBS
300KVA	RC300JB	#9	1330LBS		RC300HC	#8	900LBS		RC300HB	#8	900LBS