Installation Environment Checklist

1

Site selection

The site of the equipment room is free of high or low temperature, heavy dust, harmful gas, inflammable or explosive materials, electromagnetic interference (nearby large-sized radar station, broadcast transmitting station, or transformer station), unstable electric voltage, and large vibration or strong noise. During engineering design, you need to consider hydrology, geography, earthquake, electric power, and transportation conditions according to the technical requirements for communication network planning and communication devices.

2

Civil construction

The space of the equipment room must be sufficient for product installation and capacity expansion. The floor must meet the bearing weight requirements. Cable troughs, ladders, and holes are installed or ready and the decoration is completed.

3

Operating temperature

• When the altitude is between -60 m and +1800 m, the ambient temperature is within 5°C to 40°C for common disk enclosures.
• When the altitude is between 1800 m and 3000 m, the temperature drops by 1ºC when the altitude increases by 220 m.

4

Altitude

• Operating altitude of disks

  SSD: -305 m to +3048 m

• Non-operating altitude of disks

  SSD: -305 m to +12,192 m

5

Particle contaminants

• ISO^a14644-1 Class 8
• You are advised to arrange a professional organization to monitor particulate pollutants in the equipment room.

6

Corrosive airborne contaminants

• Copper corrosion rate: less than 300 Å^b/month as per ANSI^c/ISA^d-71.04 severity level G1
• Silver corrosion rate: less than 200 Å^b/month as per ANSI^c/ISA^d-71.04 severity level G1
• You are advised to arrange a professional organization to monitor the corrosive airborne contaminants in the equipment room.
• The following is an example of initial evaluation for environmental corrosion risks.
  • Whether the equipment room is near any sulfurous gas emission sources, for example, porcelain factories, rubber plants, tire factories, chemical factories, sewage plants, power stations, paper mills, smelters, automobile factories, coal mines, electroplating factories, food factories, and/or tanneries? If yes, environmental corrosion risks may exist.
  • Whether the equipment room is near the sea, saline, sewer outlets, sewage treatment tanks, and/or industrial/heating boilers? If yes, environmental corrosion risks may exist.
  • Whether the equipment room was decorated in the recent six months? If yes, environmental corrosion risks may exist.
  • Whether batteries are stocked in the equipment room, and whether the storage battery leaks? If yes, environmental corrosion risks may exist.
  • Whether the equipment room is closed tightly, and whether the room windows and doors are always closed? If no, environmental corrosion risks may exist.

7

Vibration and shock

• Operating vibration
  • 5 Hz to 300 Hz: 1.5 m/s², 0.5 oct/min 3 axes, 1 sweep cycles per axis
  • 5 Hz to 500 Hz: 0.27 Grms, 3 axes, 10 min per axis
• Non-operating vibration

  5 Hz to 20 Hz, PSD: 1.0 m²/s³; 20 Hz to 200 Hz, –3 dB/oct; 3 axes, 30 min per axis

• Non-operating shock

  Half sine, 6 ms, 300 m/s², 6 directions, 3 times per direction

8

Air conditioner

If the temperature in the room exceeds 35°C, you are advised to install air conditioners (which can restart automatically after a power-off). Do not let the air conditioner blow directly toward the devices.

9

Moisture prevention

If the relative humidity is greater than 70%, install dehumidifying devices, such as the air conditioner with the dehumidification function or special dehumidifier. Ensure that the equipment room is protected from water seepage and dew.

10

Heating

For an environment where the average daily temperature is lower than 5°C for at least 90 days each year, heating devices are required. For an environment where the average temperature is lower than 5°C for 60 to 90 days each year, heating devices are recommended.

11

Ventilation and heat dissipation

A cabinet is at least 1000 mm away from the wall and 1200 mm away from another cabinet. To maintain a convective air transfer between the cabinet and the equipment room, no enclosed space is allowed in the cabinet. It is recommended that you leave 1 U space above and below each device.

12

Dust prevention

For the equipment room near dust sources (such as coal mines, country roads, or farmland), use double-layer aluminum alloy windows for proper sealing and an anti-theft and fireproof door. Separate the devices from the door with a partition board to avoid dust.

13

Ground resistance

The ground resistance is smaller than 10 ohm. The distance between the top of the ground terminal and the ground is at least 0.7 m. In the cold regions, bury the ground terminal under the layer of frozen earth. The ground resistance is measured periodically to ensure that the grounding is effective.

14

Ground lead-in

The ground bar in the equipment room is securely connected to ground cables. The ground lead-in is less than 30 m and is prepared using zinc-coated flat steel whose cross-sectional area is not smaller than 40 mm x 4 mm. The contact point is processed for insulation and anticorrosive purposes. The above-ground steel is protected from mechanical damage and is intact without soldering points for the break.

15

Neutral-ground voltage

A neutral-ground voltage lower than 2 V is recommended. The maximum value is 4 V. Ensure that the device is properly grounded.

16

Lightning protection

The equipment room is equipped with lightning conductors such as a lightning rod and lightning belt. The lightning conductors are connected to the same ground bar as the protection ground of the equipment room.

17

AC

For details, see "Electrical Specifications" in Specifications Query (https://support-it.huawei.com/spec/#/home).

18

High-voltage DC

19

Circuit breaker

To avoid unexpected power loss of storage systems connected to the same circuit breaker when a storage system has failed, the AC of the circuit breaker must be no less than 10 A.

20

AC grounding

The neutral line of a power cable is not connected to the protection ground bar of any devices in the equipment room. Leading-out terminals are deployed for the AC protection ground to facilitate device grounding.

21

AC lightning protection

The AC power system of the equipment room is equipped with a lightning arrestor with a rated discharging current of no less than 20,000 A, and the arrestor is properly grounded.

22

Transmission device

The transmission system commissioning is complete and meets all engineering requirements. The protection ground of the transmission system is securely connected to the ground bar in the equipment room.

23

Cabinet

The cabinet is a standard 19-inch one with a depth of at least 1000 mm.

a: ISO is short for International Organization for Standardization.

b: Å (short for Ångström) is a unit of length equal to 1/10,000,000,000 (one ten billionth) of a meter.

c: ANSI is short for American National Standards Institute.

d: ISA is short for Instrument Society of America.