Operation Environment Requirements. Layout of Equipment Room. Lightening Protection and Grounding Requirements, страница 4

Besides dust-proof efforts, measures also should be taken to prevent the equipment room from being corroded by harmful gases such as SO_2, H₂S, NH₃ and so on. Table A-5 shows the content limit on corrosive gases.

Table A-5 Corrosive gas content specification

To fulfill the above requirements, the following measures can be taken for the equipment room:

n  Build the equipment room way from places with high corrosive gas density such as the area near a chemical plant.

n  The air intake of the equipment room should be at the opposite side to the pollution source.

n  Place storage batteries isolated from one another. It is best to place only one battery in a room.

n  Arrange an agreement with a professional monitoring company to monitor the environment regularly.

A.6  Electromagnetic Requirements

The electromagnetic requirements are showed in Table A-6.

Table A-6 Electromagnetic specification

You can take the following measures to suppress interferences:

n  Build the equipment room way from electric transformers, high-voltage power lines and other equipment or devices with high current. For example, you may build it 20 meters or more away from the transformer, or more than 50 meters from high-voltage power lines.

n  Build the room way from high-power radio transmitters. For example,  build it at a place where there is no high-power radio transmitter within 500 meters.

n  If there is a mobile communication transmitter in the comprehensive building, make sure its interference level complies with the corresponding standard. Shielding and isolation measures can be taken for further protection if necessary.

n  Release and execute stipulations that forbid any personnel using wireless handy communication devices close to equipments in the equipment room.

A.7  Antistatic Protection

The absolute static voltage value should be less than 1000V.

To fulfill this requirement, you can take measures listed below:

n  Train all operating personnel to have the basic static knowledge.

n  Keep a 60% RH humidity or higher to reduce static influence.

n  Use antistatic floor, shoes, clothes, and wrist strap.

A.8  Lightening Protection and Grounding Requirements

Table A-7 shows the requirements on lightening protection and grounding

Table A-7 Requirements on lightening protection and grounding