PSD Substation Transformers Help
Effective Date: July 2024
Links inside This Document
FM (Factory Mutual) and UL (Underwriters Laboratories)
NGR:
VFI (Vacuum Fault Interrupter)
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DOMESTIC PREFERENCE STATUTES |
Regulation Citation |
Regulation Citation |
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Buy America Act |
Build America / Buy America (BABA) Infrastructure Investment & Jobs Act 41 USC 8301 Sec. 709001 |
Product must be manufactured in the US and cost of US components must be greater than 55% of the total cost of all components. |
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Buy America Act |
Federal Highway Administration (FHWA) 23 CFR-635.410 & 23 USC-313 |
1. Must be manufactured in the United States, 2. Must be Build America, Buy America compliant (55% domestic content), 3. If the cost of the iron/steel in the transformer is the majority (51% or more) of the cost of components, then it is considered an Iron & Steel product and must have a domestic iron & steel certification. |
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Buy America Act |
Federal Railroad Administration (FRA) 49 USC - 22905 |
If product is an integral part of an electrical distribution SYSTEM and is manufactured in the United States. |
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Buy America Act |
Federal Transit Administration (FTA) 49 CFR - 661 |
If product is an integral part of an electrical distribution SYSTEM and is manufactured in the United States. |
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Buy American (FAA) |
Federal Aviation Administration (FAA) 49 USC - 50101 |
Products are manufactured in the US and all the materials are of US Origin. Waiver allowed if materials exceed 60% of US content. |
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Buy American Act |
48 CFR - 25.1 (Supplies) 41 USC-8301 |
End product is manufactured in the US and is of the same general offering supplied to both the govt and the commercial markets. |
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Buy American Act |
48 CFR - 25.2 (Construction) 41 USC-8301 |
End product is manufactured in the US and is of the same general offering supplied to both the govt and the commercial markets. |
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Buy American Act |
American Reinvestment & Recovery Act (ARRA) 48 CFR - 25.6 |
End product is manufactured in the US and is of the same general offering supplied to both the govt and the commercial markets. |
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Buy American Act |
Balance of Payments Program 48 CFR - 252.225-7000 and 7001 |
End product is manufactured in the US and is of the same general offering supplied to both the govt and the commercial markets. |
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Buy American Act |
Free Trade Agreement 48 CFR - 252.225-7036. Also FAR 52.225-11 & 52.225-12 |
End product is manufactured in the US and is of the same general offering supplied to both the govt and the commercial markets. |
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Buy American Act |
Trade Agreements Act (TAA) 48 CFR-25.4 & 225.4 and 19 USC & 2501-2581 |
End product must be mfg in the US or country having a FTA with the US (i.e., MX, CA). |
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Inflation Reduction Act |
Inflation Reduction Act (IRA) |
Made in US and manufactured product. Direct components (raw material origin does not matter) in unit is counted toward % of total value of unit. |
FM (Factory Mutual) and UL (Underwriters Laboratories):
The following provides information with regards to Eaton’s offerings and limitations with regards to FM approval, UL listing, and UL Classification for transformers.
· Underwriters Laboratories (UL) Listed:
o Transformer will include a nameplate with ‘UL’ logo.
o Further information regarding UL requirements can be found on the UL website: http://www.UL.com
o Canada - UL Listed:
§ Eaton Cooper Power Systems holds an UL file for Canada. If UL is selected in the quotation tool and the end user is located in Canada a nameplate with a ‘cUL’ logo will be provided.
· Further information regarding cUL certification can be found at the following website: https://iq.ulprospector.com/en/profile?e=184783
o The following ratings are the maximum allowed by Eaton’s UL listing within the US and Canada for transformers:
§ Class: 35kV
§ kVA: 10,000 kVA
§ Primary: 34.5kV
§ Secondary: 95kV BIL
§ Primary BIL: 200kV
§ Secondary BIL: 95kV
· Underwriters Laboratories (UL) Classification:
o Transformer will include a nameplate with UL logo
o For substation designs transformer will include additional nameplate containing fusing information only when fusing is customer-supplied. For substation designs when fusing is provided within the transformer an additional nameplate will not be provided. (Fusing will be shown on manufacturer nameplate when provided within the transformer). For all pad mount designs, regardless of the location of the fusing, fusing information will be displayed on the main transformer nameplate.
o All UL Classified transformers are required to be UL listed.
o UL Classification requires the following features:
§ Liquid level gauge for all kVA
§ Dial type thermometer and pressure vacuum gauge for 750kVA and above
§ Rapid rise relay for 2501kVA and above
§ Pressure relief device sized according to kVA rating
§ Alarm contact for pressure relief device for 2501kVA and above
§ UL Classified nameplate
o If fusing is not provided by Eaton within the transformer the customer must provide overcurrent protection to meet the respective standard (NEC 450-23). At time of purchase order, the customer must provide type of overcurrent protection, manufacturer, part number, model, rating, and I2t value. Customer provided fusing information must be reviewed and deemed adequate with respect to (put std here) by Eaton transformer engineering group prior to release to manufacturing.
· Factory Mutual (FM) Approval:
o Transformer will include additional nameplate containing fusing information provided by the factory or the end user
o The following ratings are maximum allowed by FM Approvals standard for transformers:
§ Class: 35kV
§ kVA: 10,000 kVA
o FM Indoor requires the following selectable features:
§ FR3 fluid only
§ Liquid Level gauge for all kVA
§ Dial type thermometer and pressure vacuum gauge for 750kVA and above
§ Rapid rise relay for 2501kVA and above
§ Pressure relief device sized according to kVA rating.
§ Alarm contact for pressure relief device for 501kVA and above
§ FM Indoor nameplate
o FM Outdoor requires the following selectable features:
§ FR3 fluid only
§ Liquid Level gauge for all kVA
§ Dial type thermometer and pressure vacuum gauge for 750kVA and above
§ Rapid rise relay for 2501kVA and above
§ Pressure relief device sized according to kVA rating.
§ Alarm contact for pressure relief device for 2501kVA and above
§ FM Outdoor nameplate
o If fusing is not provided by Eaton within the transformer the customer must provide overcurrent protection to meet the respective standard (FM Standard 3990). At time of purchase order, the customer must provide type of overcurrent protection, manufacturer, part number, model, rating, and I2t value. Customer provided fusing information must be reviewed and deemed adequate with respect to (put std here) by Eaton transformer engineering group prior to release to manufacturing.
The following lists contains features that would force a unit to not be UL listed, UL Classified, or FM approved:
o Out of UL Scope (both UL listing and UL Classification)
§ Motor Operator (not controlled by relay)
§ Controls with SCADA
§ N2 preservation systems
§ Tri-plex power center units
§ External Buswork
§ Jab-O style CTs
§ Non-UL Recognized/listed parts
§ Pressure transducer
§ Mineral Oil (UL Classification only)
§ No arresters (UL Hazardous only)
§ No VFIs (UL Hazardous only)
§ No Internal Control Boxes (UL Hazardous only)
o Out of FM Scope (both indoor and outdoor)
§ Mineral Oil
Busing inserts elbow arrester interfaces: Details on the interfaces used in busing insert elbow arresters. (For more information, follow the link provided)
Loadbreak switching: Feature that allows the safe disconnection and re-connection of loads on the primary side of the system. (For more information, follow the link provided)
See segment diagram under the Primary section
Tank dimenensions and standard cooling locations
For all gauges, unless mentioned, Qualitrol branded gauges are the standard.
Liquid Level Gauge: Use to measure and monitor the fluid level within the system
Thermometer: Use to monitor temperature conditions within the system
Pressure Vacuum Gauge: Use to monitor pressure level within the system
Pressure relief device: Used to maintain safe pressure levels in the system.
Rapid Rise Relays: Used to detect sudden pressure events in order to minimize potential transformer tank damage
Drain valve with sampler: Drain valve equipped with a sampler, allowing for the collection and analysis of oil from inside the tank.
NGR (Neutral Grounding Resistor)
Selections available are designed and rated for a maximum fault current and time duration. Customer must supply both the fault current and time duration required.
NGR voltage rating should be selected for the phase-to-ground voltage value.
If a NGR with a continuous current rating is required, contact factory to add NGR to quote bill of material
If a NGR with hazardous duty rating is required, contact factory to add NGR to quote bill of material. Factory will require the group code (A,B,C or D) and the T code (maximum temperature rating). Group A is out of scope.
If the customer is requesting a complete NGR monitoring system or Ground Fault monitoring system, you must select current transformer (CT), sensing resistor, and relay.