Electrical Cabinet Operating Conditions Guide

1) Normal working atmospheric conditions

① Ambient temperature:
Indoor: -10~55″C
Outdoor: -24~55″C
② Relative humidity: 5%~95% (no condensation or ice inside the cabinet)
③ Atmospheric pressure: 80~110 kPa

2) Storage and transportation atmospheric conditions

The extreme range of the ambient temperature of the cabinet during storage and transportation should be -40~70″C, and the relative humidity should not exceed 85%; the ambient temperature for long-term storage should be -10~55″C.

3) Other conditions of use

① The place of use shall not be subject to explosive, corrosive, conductive, or insulating and surface coating damage media, and serious mold is not allowed to exist
② The place of use shall not be subject to mechanical vibration and impact exceeding the severity level of DL4, and collision exceeding the severity level of K2

Note：Special conditions of use shall be negotiated by the supply and demand parties and stipulated in the supply contract

Replace Generic Limits With Project Data

Temperature, humidity, altitude and atmospheric conditions should come from the installation specification. Values used for one cabinet or standard should not be copied to every project.

Address Condensation

Rapid temperature change can create condensation even when average humidity seems acceptable. Drainage, heaters, insulation or controlled ventilation may be needed based on the system design.

Separate Operation From Storage and Transport

Shipping and storage can expose cabinets to different temperature, humidity, shock and vibration. Packaging and lifting provisions should match the route and duration.

Document Mechanical and Chemical Exposure

Record vibration, impact, salt, dust, corrosive media and cleaning practices. These inputs influence material, finish, fasteners, seals and anchoring.