10 Years Manufacturer FTHN-12 (XGN15-12) Metal Closed Box ing High Voltage Switchgear to Borussia Dortmund Factories
Exterior and dimensions
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FTHN-12 Indoor exchange metal closed box ring high voltage switchgear is Complete sets of power distribution equipment with 3.6 ~ 12Kv, three-phase, AC 50Hz. It is widely used in the power distribution system of construction and transformation of urban power grids also used in the power supply system of the industrial and mining enterprises, high-rise buildings, residential quarters, hospitals, schools, parks etc for the use of the power acceptance and distribution.
Mainly used for ring network power supply system, for the use of power acceptance and distribution.
Mainly used for ring network power supply and terminal power supply, also suitable for installing into the assembly substation.
This product complies with GB3804-1990, GB3906-2006, GB16926-1997, GB / T11022-1999, GB15166.2-1994, GB1985-1989, GB3309-1989, IEC420-1990 and other standards, and passed all type of test.
Operating environmental conditions
A) Ambient temperature
Maximum temperature: + 40 ℃
Minimum temperature: -15 ℃
Daily average: ≤35 ℃
B) Ambient humidity
Daily average relative humidity: ≤ 95%
Monthly average relative humidity: ≤90%
Daily average vapor pressure: ≤2.2X10-3 Mpa
C) Altitude: no more than 1000m;
D) earthquake intensity does not exceed 8 degrees;
E) Operating place without water dripping, no flammable and explosive hazards, no chemical corrosion of gas and no severe vibration.
“Highline,” an overview of BPA’s role as a transmission system operator, includes a tour of BPA’s Ross Substation and aerial photography. It tells the story of building the transmission system in the voice of a self-titled “transmission man” who is taking his nephew Bill around for a look at what BPA is doing. There are appearances by Dr. Paul J. Raver, BPA’s second administrator, and Sol Schultz, first chief engineer, as well as Abraham Osipovich. Osipovich made substantial contributions to BPA, including the innovation of vibration dampers on transmission towers, which help reduce wind noise. It was the first color film produced by BPA’s Motion Picture Information Division and the final film written by information officer Stephen Kahn before he left the agency. Learn about other BPA films at: www.bpa.gov/goto/Films.
The simplest case is a switch to connect a motor to a power source, such as in small appliances or power tools. The switch may be manually operated or may be a relay or contractor connected to some form of sensor to automatically start and stop the motor. The switch may have several positions to select different connections of the motor. This may allow reduced-voltage starting of the motor, reversing control or selection of multiple speeds. Overload and over current protection may be omitted in very small motor controllers, which rely on the supplying circuit to have over current protection. Small motors may have built-in overload devices to automatically open the circuit on overload. Larger motors have a protective overload relay or temperature sensing relay included in the controller and fuses or circuit breakers for over current protection. An automatic motor controller may also include limit switches or other devices to protect the driven machinery.
More complex motor controllers may be used to accurately control the speed and torque of the connected motor (or motors) and may be part of closed loop control systems for precise positioning of a driven machine. For example, a numerically controlled lathe will accurately position the cutting tool according to a preprogrammed profile and compensate for varying load conditions and perturbing forces to maintain tool position.