Type GCS low-voltage withdrawable switchgear (hereinafter referred to as device) is two joint design according to the department in charge of industry, the majority of power users and design units developed in accordance with the requirements of design conditions, with high technical performance indicators, can adapt to power market development needs and can compete with the introduction of existing product low voltage draw-out switch cabinet.The device has been widely used by power users.
The equipment is suitable for power distribution system in power plant, petroleum, chemical industry, metallurgy, textile, high-rise building and other industries.In large power plants, petrochemical systems and other places with high degree of automation and requiring computer interface, it can be used as a low-voltage set for distribution, centralized control of motors and reactive power compensation in power and power supply systems with three-phase ac frequency of 50(60)Hz, rated working voltage of 380(400, 660)V and rated current of 4000A or below.
Ambient air temperature not higher than +40℃, not lower than -5℃.The average temperature within 24 hours shall not be higher than +35℃.When exceeding, the capacity shall be reduced according to the actual situation.
Indoor use, the altitude of the use area must not exceed 2000m.
Delta surrounding air relative humidity at the highest temperature of +40℃ is not more than 50%, at a lower temperature allowed to have a larger relative humidity E such as +20℃ is 90%, should be considered due to the temperature change may occasionally produce condensation.
Delta device installation with the tilt of the vertical plane is no more than 5%, and the whole cabinet is relatively flat (in line with gbj232-82 standard).
Delta devices should be installed without severe vibration and shock and insufficient electrical components should not be subject to corrosion.
Delta users have special requirements, can negotiate with the manufacturer to solve.
Basic technical parameters
Basic technical parameters are shown in table 1
Main circuit scheme: the main circuit scheme of the device has a total of 32 groups and 118 specifications (see table), excluding the schemes and specifications derived from the control and protection of auxiliary circuits.Including the needs of power generation, power supply and other power users, the rated working current is 4000A, suitable for 2500KVa and below distribution transformer selection.In addition, the capacitor compensation cabinet is designed to meet the need of increasing power factor.Considering the need of comprehensive investment, the reactor cabinet is designed.