Product overview
RM6-40.5 fully enclosed full insulated gas filled ring main unit is a new generation of switchgear produced by our company as a complete set of indoor 12~40.5kV three-phase AC 50Hz equipment for receiving and distributing electric energy. It is mainly used for power transformation and transmission of medium voltage power systems such as various power plants, substations, industrial and mining enterprises, subways, civil and commercial buildings for control, protection and monitoring. It is characterized by reliable performance, strong adaptability and small size.
Compliant standards
● GB 3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV
● DL/T 404 Indoor AC high voltage switchgear panel
● IEC 62271-200:2003 AC metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV
● 1016001/003-0000-00 Material Procurement Standard of State Grid Corporation of China for 12kV, 24kV
● 1016001/003-0000-00 Materials Procurement Standard of State Grid Corporation of China for 12kV, 24kV 40.5kV High Voltage Switchgear
● 1016001/003-0000-00 General Technical Specifications
Service condition
● Ambient temperature: the maximum temperature is 40℃, the minimum temperature is -25℃, and the average value measured within 24h does not exceed 35℃;
● Relative humidity: the average value of relative humidity measured within 24h shall not exceed 95%, and the average value of monthly relative humidity shall not exceed 90%.
● Condensation may occur when the temperature changes rapidly during high humidity. The average value of water vapor pressure measured within 24h shall not exceed 2.2kPa, and the average value of monthly water vapor pressure shall not exceed 1.8kPa;
● Altitude: no more than 1000m
● Seismic intensity: no more than 8 degrees
● The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kV
● The surrounding air is not obviously polluted by dust, smoke, corrosive and combustible gases, steam or salt mist.
Note: When the use conditions exceed the above provisions, the solution can be determined through consultation with the user.
Technical parameter
| No. | Item | Unit | Technical parameter | |||
|---|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 12 | 40.5 | ||
| 2 | Rated current | A | 1250~3150 | 1250~2500 | ||
| 3 | Rated frequency | Hz | 50 | |||
| 4 | Rated short-time withstand current | kA | 25、31.5 | |||
| 5 | Rated peak withstand current | kA | 63、80 | |||
| 6 | Rated short-circuit current duration | s | 4 | |||
| 7 | Rated short-circuit breaking current | kA | 25、31.5 | |||
| 8 | Rated short-circuit making current | kA | 63、80 | |||
| 9 | Duration of arcing | s | 0.5 | |||
| 10 | Mechanical life | Circuit breaker | time | 2000 | 10000 | |
| Isolating switch | 3000 | |||||
| Grounding switch | 3000 | |||||
| 11 | Electrical life of circuit breaker | time | 30 | |||
| 12 | Rated filled gas pressure (gauge pressure at 20℃) | MPa | 0.05 | |||
| 13 | Minimum functional pressure (gauge pressure at 20℃) | MPa | 0.03 | |||
| 14 | Annual leakage rate of SF6 gas | – | ≤ 0.5% | |||
| 15 | Rated insulation level | Rated power frequency withstand voltage (effective) | Phase to phase, phase to ground | kV | 42 | 95 |
| Isolating distance, vacuum opening | 48 | 118 | ||||
| Rated lightning impulse withstand voltage (peak) | Phase to phase, phase to ground | kV | 75 | 185 | ||
| Isolating distance, vacuum opening | 85 | 215 | ||||
| 16 | Auxiliary control circuit | Rated voltage | V | 12 | 40.5 | |
| 1min power frequency withstand voltage | – | 1250~3150 | 1250~2500 | |||
| 17 | Cabinet protection grade | Cabinet housing | – | 50 | ||
| Gas filled compartment | 25、31.5 | |||||
| 18 | Category of loss of operation continuity | A | 63、80 | |||
| 19 | Temperature rise test | 4 | ||||
| 20 | Main circuit resistance | 1250 | uΩ | 25、31.5 | ||
| 2000 | year | |||||
| 2500 | 0.5 | |||||
| 3150 | 2000 | 10000 | ||||
| 21 | Partial discharge | Test voltage | kV | 3000 | ||
| Single insulating element | pC | 3000 | ||||
| Complete set | 30 | |||||
| 22 | Service life | year | 0.05 | |||
Note:
1. The rated short-circuit breaking current of 40.5kV/2000A is 31.5kA; rated short-circuit breaking current of 12kV/3150A is 31.5kA
2. The parameters of rated peak withstand current and rated short-time withstand current of current transformer shall be assessed separately:
3. The circuit resistance refers to the measured value measured from the outgoing line of the bus coupler socket (including the bus coupler) to the outgoing line side of the cable socket (including the current device). When the bus coupler and the current device are not included, the value in the table should be subtracted by 20
Outline and structure diagram of switchgear
Note: a (cabinet width): 600mm, 800mm; b (cabinet depth): 1420 in depth for 12kV; 1620 in depth for 40.5kv.
