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The KXGN series box - type fixed metal - enclosed switchgear is applicable to 3.6 - 40.5kV ring - main unit power supply and double - radiation power supply systems. It can also be used for terminal power supply or installed in a box - type substation for the control and protection of electric energy. It can be used for the protection and control of electrical equipment in power plants, substations, and distribution stations of industrial and mining enterprises. When combined with relevant load switches, it can form a multi - solution ring - main power supply equipment.
Execution Standards
IEC60265 High-voltage load switches
IEC 62271-102 Alternating-current high-voltage disconnectors and earthing switches
IEC 62271-105 Alternating-current high-voltage load switch - fuse combinations
IEC 60694 General specifications for high-voltage switchgear and controlgear
GB/T11022 Common technical requirements for high-voltage switchgear and controlgear standards
GB3804 3.6 - 40.5kV alternating-current high-voltage load switches
GB3906 3.6 - 40.5kV alternating-current metal-enclosed switchgear and controlgear
GB16926 Alternating-current high-voltage load switch - fuse combinations
DL/T404 Technical conditions for ordering indoor alternating-current high-voltage switchgear
DL/T 593 Common ordering technical guidelines for high-voltage switchgear
Operating Environment
1. Altitude: ≤4000m (When the equipment operates at an altitude above 1000m, please specify it particularly so as to adjust the inflation pressure during manufacturing).
2. Ambient temperature: Maximum temperature: +55℃; Minimum temperature: -25℃; The average temperature within 24 hours does not exceed 35℃.
3. Ambient humidity: The average relative humidity within 24 hours does not exceed 95%; The average monthly relative humidity does not exceed 90%.
4. Installation environment: The surrounding air has no explosive and corrosive gases. The installation site has no severe vibration and shock. The pollution level does not exceed Class C in GB/T 26218.1.
5. Seismic intensity: 8 degrees.
Structural Features
1. The cabinet body steel plate is made of high-quality hot-dip galvanized thin steel plate processed by CNC equipment, featuring high precision, good strength, corrosion resistance, light weight, and good versatility.
2. Equipped with the FMG load switch or FRMG combination electrical appliance independently designed and developed by our company, it has high reliability, small volume, long service life, and can achieve maintenance-free operation.
3. The interlocking device is practical and reliable, fully meeting the "five-prevention" requirements.
4. It has a reliable grounding protection system, and a pressure relief channel is provided at the rear of the cabinet body to ensure personal safety.
Technical Parameter Table
Serial number | project | unit | Parameters | ||||
1 | Rated voltage | kV | 11 | 24 | 36 | ||
2 | Rated current | A | 630 | 630 | 630 | ||
3 | Rated frequency | Hz | 50 | 50 | 50 | ||
4 | Insulation level | Rated short-time power frequency withstand voltage (between phases and to ground / between open contacts) | kV | 28/32 | 50/60 | 70/80 | |
Rated lightning impulse withstand voltage (between phases and to ground / between open contacts) | kV | 75/85 | 125/145 | 175/195 | |||
5 | Rated short-time withstand current | kA/s | 25/3 | 20/3 | 16/1 | ||
6 | Rated peak withstand current | kA | 62.5 | 50 | 40 | ||
7 | Rated short - circuit making current | kA | 62.5 | 50 | 40 | ||
8 | Maximum breaking and transfer current | A | 1700 | 1400 | 630 | ||
9 | Rated closed-loop breaking current | A | 630 | 630 | 630 | ||
10 | The maximum rated current of the fuse | A | 200 | 200 | 63 | ||
11 | Mechanical life | Main switch | ops | M2(5000) | M2(5000) | M1(1000) | |
Earthing switch | ops | M1(2000) | M1(2000) | M0(1000) | |||
12 | Electrical life | / | Class E3 | Class E3 | Class E3 | ||
13 | IAC class | / | A-FLR | A-FLR | A-FLR | ||
14 | protection level | Cabinet | / | IP 4X | IP 4X | IP 4X | |
