Y-50 Cable
| Y-50 Cable | |
|---|---|
| Location | |
| Country | United States |
| State | New York |
| From | Dunwoodie Substation, Yonkers, New York |
| To | Glenwood Generating Station, Glenwood Landing, New York |
| Ownership information | |
| Owner | Consolidated Edison Long Island Power Authority |
| Operator | Consolidated Edison |
| Construction information | |
| Commissioned | 1978 |
| Technical information | |
| Type | Undersea; underground |
| Total length | 17.4 mi (28.0 km) |
| AC voltage | 345 kV |
The Y-50 Cable (also known as the Dunwoodie–Glenwood Line or simply Y-50) is an undersea and underground high voltage electric transmission cable between Westchester County and Long Island via the Long Island Sound and Hempstead Harbor in New York, United States.
Description
The Y-50 Cable travels between the Dunwoodie Substation in Yonkers, Westchester County to the Glenwood Generating Station in Glenwood Landing, Nassau County.[1][2] It travels under the Long Island Sound between Westchester County and Long Island. The line between Dunwoodie and the Glenwood Generating station is approximately 17.4 miles (28.0 km) – or roughly 91,000 feet (28,000 m).[1]
Y-50 is one of five undersea transmission lines connecting between Long Island and the Continental United States as of 2021 (four of which are operated by NYPA).[3] The line delivers power to – and was constructed and developed as a joint venture between – both the Long Island Power Authority (LIPA) and Consolidated Edison (ConEd).[4] As of 2026, the cable is operated by ConEd.[5]
History
The Y-50 Cable began operating in 1978.[3][4]
In 2002, the cable experienced a fault that caused a month-and-a-half interruption, after which the operators lowered its usage from its 600 MW capacity down to 400 MW for a few months.[4][6] It experienced another fault in 2021, at which point it had a 656 MW capacity.[7][3]
See also
References
- 1 2 Long Island Sound-Hempstead Harbor Transmission Cable, Con Edison-Long Island Lighting County: Environmental Impact Statement. 1975.
- ↑ "Electric Power Transmission Lines". hifld-geoplatform.opendata.arcgis.com. Retrieved 2021-08-21.
- 1 2 3 Harrington, Mark (2021-09-21). "1 failed power cable restored, another may be by mid-October, power authorities say". Newsday. Retrieved 2022-03-23.
- 1 2 3 "LIPA and Con Edison Put Y50 Cable Back In Service". Power Quality Magazine. 2002-07-01. Retrieved 2022-03-23.
- ↑ "Annual Disclosure Report of the Long Island Power Authority, Fiscal Year 2021" (PDF). Long Island Power Authority. 2021. Retrieved 2026-08-23.
- ↑ "Long Island Power Authority and Subsidiaries: Consolidated Financial Statements, December 31, 2002 and 2001" (PDF). Long Island Power Authority. p. 8.
- ↑ Harrington, Mark (2021-08-11). "LIPA discloses two new major power line failures". Newsday. Archived from the original on 2021-08-21. Retrieved 2021-08-21.