Related professional requirements
[1] [single choice in 2009 (below)] Which of the following is correct about the building requirements of 10kV substation? ( )
A. natural lighting windows should not be set in the high-voltage distribution room.
B the door between the low-voltage distribution rooms should be able to be opened in both directions.
C natural lighting windows should not be set in the low-voltage distribution room.
D the door between the high and low voltage transformer room should be opened in the direction of the low voltage transformer room.
Answer: b
Analysis: 6.2. 1 The high-voltage distribution room should be provided with natural lighting windows that cannot be opened, and the window sill should not be less than1.8m from the outdoor terrace; The low-voltage distribution room can be provided with an openable natural lighting window. It is not advisable to open the window on the street side of the distribution room.
6.2.2 The doors of transformer room, distribution room and capacitor room should be opened outwards. When there is a door between adjacent power distribution rooms, the door should be able to open in both directions.
[2][20 10, 20 1 1] In the design of a machining workshop 10kV substation, the designers put forward the following requirements for fire protection and building. Which items do not meet the specification requirements? ( )
A the fire resistance rating of the combustible oil-immersed transformer room is Grade I, the fire resistance rating of the high-voltage distribution room and the high-voltage capacitor room is not lower than Grade II, and the fire resistance rating of the low-voltage distribution room and the low-voltage capacitor room is not lower than Grade III.
B the transformer room is located in the building, and the doors of the oil-immersed transformer room are designed as Class B fire doors.
C the combustible oil-immersed transformer room is equipped with an oil storage tank with a capacity of 50% of transformer oil.
D a natural lighting window that cannot be opened is set on the street side of the high-voltage distribution room, and the window sill should be no less than 1.7m from the outdoor ground.
Answer: b, c, d
Analysis: 6. 1. 1 The fire resistance rating of the combustible oil-immersed power transformer room should be Grade I. The fire resistance rating of the high-voltage distribution room, high-voltage capacitor room and power transformer room using incombustible (or flame-retardant) media should not be lower than Grade II. The fire resistance rating of low-voltage distribution room and low-voltage capacitor room should not be lower than Grade III, and the roof load-bearing members should be Grade II.
6. 1.2 Under any of the following circumstances, the door of the oil-immersed transformer room shall be a Class A fire door:
First, the power distribution room is located in the workshop.
Second, the power distribution room is located where combustible dust and combustible fibers are easy to deposit.
3. Near the power distribution room, there is an open-air yard with a large number of flammable items such as grain and cotton piled up.
Four, the distribution room is located in the building.
There is a basement under the distribution room.
6. 1.5 The combustible oil-immersed transformer room in the auxiliary substation in the civil main building and the substation in the workshop shall be equipped with oil storage tanks with the capacity of transformer oil 100%.
6.2. 1 The high-voltage distribution room should be provided with natural lighting windows that cannot be opened, and the window sill should not be less than1.8m from the outdoor ground; The low-voltage distribution room can be provided with an openable natural lighting window. It is not advisable to open the window on the street side of the distribution room.
[1] [2009 multiple choices (1)] 10kV design scheme of shunt capacitor device in substation, which of the following does not meet the specification requirements? ( )
A. The high-voltage capacitor bank adopts star connection with neutral point grounded.
B a single high-voltage capacitor is equipped with a special fuse as the internal fault protection of the capacitor, and the rated current of the fuse is considered as 2.0 times of the rated current of the capacitor.
C due to the small capacity of the capacitor bank, the high-voltage capacitor device is arranged in the high-voltage distribution room, and the distance from the high-voltage capacitor device is not less than1.0m. when the complete capacitor cabinet is arranged in a single row, the distance from the front of the cabinet to the wall should not be less than1.5m.
D. If the high-voltage capacitor device is arranged in a separate room, when the complete set of capacitor cabinets are arranged in a single row, the distance from the front of the cabinet to the wall should not be less than1.5m..
Answer: a, b, c