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2. High-voltage switchgear - Wikipedia

   en.wikipedia.org/wiki/High-voltage_switchgear

   750 kV high-voltage switchgear. High-voltage switchgear is any switchgear used to connect or disconnect a part of a high-voltage power system.This equipment is essential for the protection and safe operation, without interruption, of a high voltage power system, and is important because it is directly linked to the quality of the electricity supply.

3. Hitachi Energy - Wikipedia

   en.wikipedia.org/wiki/Hitachi_Energy

   In July 2020, ABB divested its power grid business and sold 80.1% of that to Hitachi Ltd., leading to the formation of Hitachi ABB Power Grids. [1] In October 2021, Hitachi ABB Power Grids changed its company name to Hitachi Energy. In December 2022, it was confirmed that Hitachi acquired the remaining 19.9 percent shares from ABB Ltd. [2]

4. Switchgear - Wikipedia

   en.wikipedia.org/wiki/Switchgear

   A switchgear may be a simple open-air isolator switch or it may be insulated by some other substance. An effective although more costly form of switchgear is the gas-insulated switchgear (GIS), where the conductors and contacts are insulated by pressurized sulfur hexafluoride gas (SF 6). Other common types are oil or vacuum insulated switchgear.

5. Washington Metro rolling stock - Wikipedia

   en.wikipedia.org/wiki/Washington_Metro_rolling_stock

   The 7000-series cars, the system's newest, have an operator's cab in only one of each married pair's cars and operate in groups of three or four. [1] The system's track gauge is 4 ft 8 + 1 ⁄ 4 in (1,429 mm) – 0.25 inches (6 mm) narrower than 4 ft 8 + 1 ⁄ 2 in (1,435 mm) standard gauge. [2]

6. Hitachi - Wikipedia

   en.wikipedia.org/wiki/Hitachi

   Hitachi, Ltd. [nb 1] (Japanese pronunciation: [çi̥taꜜtɕi]) is a Japanese multinational conglomerate founded in 1910 and headquartered in Chiyoda, Tokyo.The company is active in a range of industries, including digital systems, power and renewable energy, railway systems, healthcare products, and financial systems. [4]

7. List of telephone switches - Wikipedia

   en.wikipedia.org/wiki/List_of_telephone_switches

   EMS-1 (The ITEC Electronic Modular Switch is an electronic direct control switching system. The modules are combined to form a complete switch or any of the modules can be added to your present Step-by-Step Systems.) EMS-2 (The EMS-2 RURAL SWITCH is a stored program control analog switch designed to be cost-effective in small exchanges.

8. Hybrid switchgear module - Wikipedia

   en.wikipedia.org/wiki/Hybrid_switchgear_module

   High-voltage switchgears have been traditionally distinguished according to the medium used to extinguish the arc. In the case of the hybrid switchgear modules, this device developed during last 90’s uses two different types of technologies: one to extinguish the arc and the other to connect to the other equipment of the high voltage substation, for pursuing the goal of maximizing the ...

9. Hitachi Monorail - Wikipedia

   en.wikipedia.org/wiki/Hitachi_Monorail

   Type Capacity Axle load Track beam Maximum grade Turning radius; Large: 415: 11 t (11 long tons; 12 short tons) 0.85 m × 1.5 m (2 ft 9.46 in × 4 ft 11.06 in)