The main supply provides the building with 13,200V that needs to be stepped down to provide both 480/277V and 208/120V respectively. The primary transformer will step down service for the HVAC mechanical units, as well as for the elevator system. A secondary transformer will step down the service further in order to power office equipment, appliances, and light in the building.
For our primary transformer, we selected a dry type transformer with a range of 9kVA to 10,000kVA. Our building's total demand based on 5W/sf is 100kVA. The electrical room is 15'x20' and has adequate space for this transformer unit.
Our secondary transformer is a 600V small general purpose transformer at 75kVA. Our demand from lighting and equipment is around 60kVA. This unit would also be found in the electrical room at the north corner of the building.
link to the website http://www.mgm-transformer.com/prod.html
Primary Transformer Selection:
|
Dry Type Substation Transformers For over two decades, MGM Transformer Company has been a reliable source for quality secondary unit substation transformers. Our standard designs cover the full range of requirements from 5kV to 34.5kV, 500kVA to 10,000kVA, in both liquid and dry type. As an engineering oriented transformer company, we maintain a large engineering staff. Our experience in working with various switchgear manufacturers enables us to design the high voltage/low voltage switchgear interface, assuring the proper match in the field. Flex connectors can be supplied. Non-standard substation designs are also available for special situations such as failed unit retrofitting or PCB replacement. All manufacturing processes are done on the premises. This advantage, along with a large inventory of electrical steel and wire, assures our customers of the industry's shortest lead times, regardless of the interface requirements. |
 |
Dry Substation 1800kVA Primary 6.3kVA Secondary 400Y/231V 50Hz; 150°C Rise; Copper Wound; Digital Temperature Moniter; NEMA 3R Louvers; Low Voltage Transition Section with Flex Leads. |
| 9kVA-10,000KVA, 2.4/5kV |
| 30kVA-10,000KVA, 15kV |
| 500kVA-7,500kVA, 34.5kVA |
Design Specifications
| Aluminum/Copper |
| 150°C/115°C/80°C |
| 220°C Insulation |
| Indoor/Outdoor |
| ANSI Standard/Special BIL Levels |
| Dip/bake or VPI (upon request) |
| UL K-factor Ratings |
| UL/CUL/CSA Listings (check with factory) |
|
Liquid Filled Drives Isolation Transformers To meet the demands of drives applications, special design and manufacturing processes are utilized. Engineering's approach is to account for worst case scenarios, assuring conservative designs leading to long transformer life, even under severe applications. Manufacturing utilizes special winding techniques and equipment along with precision assembly and blocking methods, to maintain electrical and mechanical integrity while under stress. MGM Transformer Company specializes in working with drives manufacturers to design and supply transformers to meet their exact equipment requirements. Once specifications are determined, a matrix of designs and pricing can be established for the manufacturer, streamlining the ordering process. With a product range to10,000kVA in both liquid-filled and dry type, and an engineering staff capable of designing to most any application, MGM Transformer Company is positioned as a leader in drives isolation transformer manufacturing. |
 |
Liquid Filled Drives Isolation 1,000kVA
12- Pulse Primary 4.3kVA Secondary 2,100A/2,100Y; 65°C Rise; Copper Wound; Electro-Static Shield; Mineral Oil |
| 200kVA-7,500kVA, 5kV to 34.5kV |
| ANSI C57 (applicable section(s)) |
| IEEE (applicable sections) |
| Indoor (R-temp/Silicone) |
| Outdoor |
| 6 and 12-Pulse Applications |
| 55°C,65°C and 55°C/65°C |
| OA, OA/FFA, OA/FA |
| Aluminum/Copper |
| Electro-Static Shield(s) |
| Winding Temperature Indicator |
|
Liquid Filled Substation Transformers MGM Transformer Company has built a reputation for providing rugged, conservatively designed substation transformers. Our experienced manufacturing team, backed by a rigorous QA/QC system requirement, results in a superior transformer in quality and performance. With an extensive inventory of raw materials on site, industrys shortest lead times are maintained. As a benefit to our customers, fused and non-fused 600A 15kV load interrupter switches are maintained in inventory. These can be mated to our transformers and shipped in the same short cycle lead time as transformers without switches. |
|
|
Liquid Filled Substation
7.5MVA Primary 22.9kVA Secondary 7,200Y/4,160V 60Hz; 65° Rise; Aluminum Wound; Mineral Oil; HV/LV Throats |
| 75kVA-10,000kVA, 2.4/5kV, 3 Phase only |
| 75kVA-10,000kVA, 15kV, 3 Phase only |
| 75kVA-10,000kVA, 34.5kV, 3 Phase only |
| Aluminum/Copper |
| 55°C, 65°C and 55°C/65°C |
| OA,OA/FFA, OA/FA |
| ANSI Standard/Special BIL Levels |
| Indoor (R-temp/silicone) |
| Outdoor |
| Designed per ANSI/IEEE and NEMA |
|
Dry Type Drives Isolation Transformers MGM Transformer Company has earned the respect of the major drives manufacturers as a supplier of reliable, high quality drives isolation transformers. All transformers are custom designed to meet the customer's exact specifications, using the latest ANSI/IEEE criteria for harmonic loads. Derated standard distribution transformer designs are never used. As a design-and-build transformer company, we pride ourselves on our large and experienced engineering staff. Their extensive experience in the drives industry has resulted in our success as a supplier of these special transformers. Applications ranging from pumps and fans, to heavy duty-cycle steel rolling mills, have been designed and manufactured. We manufacture both liquid filled and dry type, from 15kVA to 7.5MVA. Our customers benefit because we are able to provide the best solution for any specific application. |
 |
Dry Type Drives Isolation 750kVA 12-Pulse Primary 3.3kVA Secondary 1,700A/1,700Y 50Hz; 125°C Rise; Copper Wound; Electro-Static Shield; Thermoswitches in Coils |
| 15kVA-2,000kVA, 600V |
| 15kVA-7,500kVA, 5kV to 34.5kV |
| ANSI C57 (applicable section(s)) |
| IEEE (applicable section(s)) |
| Indoor/Outdoor |
| 6, 12and 18-Pulse Applications |
| UL K-factor Ratings |
| 220°C Insulation |
| 150°C/115°C/80°C/Special Design Rise |
| Aluminum/Copper |
| Electro-Static Shield(s) (OPTIONAL) |
| Thermal Switches (OPTIONAL) |
transformers to step down to 120/208
Secondary Transformer Selection:
|
600V Class General Purpose Transformers MGM Transformer Company has established a national distribution network with locations in 20 major cities in the continental U.S. Because of immediate availability from warehouse inventories and competitive pricing, MGM has become one of the leaders in this industry. In addition to the standard warehouse products shown on this page, each warehouse location can supply, by special order, virtually any 600V class transformer to meet customer specifications. For a sampling of the requirements that can be supplied, please refer to the Special Design Dry Type Transformers page. |
 |
600V Class General Purpose 150 kVA, 75kVA, 45kVA; Primary 480 VA, Secondary 208Y/120V 60Hz; 150° Rise; Aluminum Wound |
| 9kVA-500kVA, 480D-208Y/120V, 3 Phase |
| 9kVA-500kVA, 480D-240D/120V, 3 Phase |
| 10kVA-100kVA, 240x480-120/240V, Single Phase |
| Aluminum or Copper Windings |
| 150ºC Temperature Rise |
| 6 Primary Taps: 2-21/2% FCAN; 4-21/2% FCBN |
| 220ºC UL Insulation |
| NEMA 1/NEMA 3R (with kit) |
| UL Listed |
