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China DSR6 Series SF6 Gas Insulated Switchgear - Reliable Supplier & Factory for Medium Voltage Solutions
Model and meaning
Work environment
Altitude: ≤ 5000m (when it runs at an altitude over 1000m, pay special attention).
Ambient temperature: Highest +50°C, lowest -25°C, 24h average ≤ 35°C.
Ambient humidity: 24h relative humidity average ≤ 95%; monthly relative humidity average ≤ 90%.
Electromagnetic interference: The amplitude of electromagnetic interference induced in the secondary system ≤ 1.6kV.
Installation environment: No explosive or corrosive gas in ambient environments, no frequent violent vibration or shock in the area to install.
Note: for any deviation from these ambient environment conditions above, consult with the company to customize.
Note: for any deviation from these ambient environment conditions above, consult with the company to customize.
Main technical parameters
| Item | Unit | Parameter | |||
|---|---|---|---|---|---|
| Rated voltage | kV | 12 | 24 | 40.5 | |
| Rated frequency | Hz | 50 | |||
| Rated current | A | 630/1250/2500/3150/4000 | 630/1250/2500 | ||
| Rated insulation level | Power frequency withstand voltage (phase-to-phase and phase-to-ground) | kV | 42 | 65 | 95 |
| Power frequency withstand voltage (insulation breaking) | kV | 48 | 79 | 118 | |
| Lightning impulse withstand voltage (phase-to-phase and phase-to-ground) | kV | 75 | 125 | 185 | |
| Lightning impulse withstand voltage (insulation breaking) | kV | 85 | 145 | 215 | |
| Rated power frequency withstand voltage of auxiliary circuit | kV | 2 | |||
| Rated instantaneous withstand current | kA | 25/31.5/40 | |||
| Rated short-circuit period | s | 3 | |||
| Rated peak withstand current | kA | 63/80/100 | 63/80/100 | 50/63/80 | |
| Rated short-circuit breaking current of circuit breaker | kA | 25/31.5/40 | 25/31.5/40 | 25/31.5 | |
| Rated short-circuit closing current of circuit breaker (peak) | kA | 63/80/100 | 63/80/100 | 50/63/80 | |
| Rated cable charge breaking current | A | 25 | |||
| Rated operating sequence | - | 0-0.3s-CO-3min-CO | |||
| Insulation gas | - | - | SF6 | ||
| Mechanical life | Circuit breaker | Time | 10000 | ||
| Three-position switch | Time | 5000 | |||
| SF6 gas rated pressure (abs.20℃) | Rated charge pressure (abs,20℃) | MPa | 0.14 | ||
| Minimum charge pressure (abs,20℃) | MPa | 0.12 | |||
| Protection grade | Sealed enclosure | Grade | IP67 | ||
| Switchgear shell | Grade | IP4X | |||
| Annual relative leak rate of dry air | %/year | ≤0.1 | |||
| Rated power voltage of auxiliary circuit | V | DC48/110/220 AC220 | |||
The general external dimensions of switchgears
| Rated voltage (kV) | Main bus rated current (A) | Type of cabinet | a (mm) Width | b (mm) Depth | d (mm) Height | Remark | |
|---|---|---|---|---|---|---|---|
| 12/24/40.5 | 630/1250 | Incoming, sectional, insulated, outgoing | 600 | 1600 | 2400 | PT tertiary | |
| (PT)Bus(PT) | 1000 | - | |||||
| Metering cabinet | Gas tank | 600/1000 | According to voltage transformer | ||||
| Air | |||||||
| 2500/3150/4000 | Incoming, sectional, insulated, outgoing Bus(PT) | 800/1000 | 1800 | 2400 | PT tertiary | ||
Min technical parameters
| NO. | Scheme | Description | Function |
|---|---|---|---|
| 1 |
|
Cable feeder cabinet 1 lower incoming 1 upper incoming |
With three-position switch, circuit breaker, closing and breaking cable and bus, can close and break the rated current; the bus on both sides can expand. In the circuit breaker gas chamber, 3 female sockets are reserved to plug in/out the plug-in cable; the arrester, potential transformer and the unused sockets can be blocked. The cable has upper incoming or lower incoming. Can cancel or block the grounding switch. |
| 2 |
|
Sectional circuit breaker cabinet 1 left link 1 right link |
With three-position switch, combined the sectional circuit breaker cabinet, to sectionalize and link the bus; can cancel or block the grounding switch. |
| 3 |
|
Sectional insulation cabinet 1 left link 1 right link |
With three-position switch, combined with sectional circuit breaker cabinet, to sectionalize and link the bus; can cancel or block the grounding switch. |
Main technical parameters
| NO. | Scheme | Description | Function |
|---|---|---|---|
| 4 |
|
Insulation upgraded cabinet 1 lower incoming 1 upper incoming |
With three-position switch, connect or insulate cable and bus; the bus on both sides can expand. Can cancel or block the grounding switch if grounding isn't required. |
| 5 |
|
Insulation cabinet | With three-position switch, female socket is reserved in the gas tank to plug in the plug-in arrester and potential transformer. |
| 6 |
|
Metering cabinet | With built-in current transformer and plug-in potential transformer, it can be combined with other functional units. |
| 7 |
|
Main bus grounding cabinet 1 left link 1 right link |
With grounding switch, ground the main bus; usually the bus on one side can expand to connect with the main buses of other functional units. |
Main technical parameters
| NO. | Scheme | Description | Function |
|---|---|---|---|
| 8 |
|
Cable incoming/outgoing cabinet (for non-separable structure of gas tank) | With three-position switch, circuit breaker, grounding and breaking cable and bus, can close or break the rated current, the bus on both sides can expand. On the bus side, can plug in/out the plug-in arrester or potential transformer and the unused sockets can be blocked. Can cancel or block the grounding switch if grounding isn’t required. |
| 9 |
|
Sectional+insulation cabinet -sectional circuit breaker cabinet and sectional insulation cabinet combined |
With three-position switch, circuit breaker and built-in current transformer, to sectionalize and link the bus. Can cancel or block the grounding switch if grounding isn’t required. |
Note: These functional modular units above are available for OEM partners.
Model number: Add rated voltage and branch bus rated current into the model number of the gas tank. If the main bus rated current and the branch bus rated current are different, indicate in the brackets.
For example:
- XGN(DSR6) -12/1250: 12kV switchgear, branch bus, main bus rated current is 1250A;
- XGN(DSR6) -12/1250 (2500): 12kV switchgear, branch bus rated current is 1250A, main bus rated current is 2500A;
Frequently Asked Questions (FAQ)
What are the ambient temperature requirements for this switchgear series?
The ambient temperature should range from a highest of +50°C to a lowest of -25°C, with a 24-hour average temperature not exceeding 35°C.
Can this equipment be installed at altitudes higher than 1000 meters?
Yes, the switchgear is rated for altitudes up to 5000m. However, for operations above 1000m, special attention must be paid, and customization options should be discussed with the manufacturer.
What type of insulation gas is used and what is the rated pressure?
The switchgear utilizes SF6 gas as the insulation medium. The rated charge pressure is 0.14 MPa (absolute at 20°C), with a minimum charge pressure of 0.12 MPa.
What is the mechanical life of the circuit breaker and the three-position switch?
The circuit breaker has a mechanical life of 10,000 operations, while the three-position switch has a mechanical life of 5,000 operations.
Are the functional modular units compatible with OEM specifications?
Yes, all listed functional modular units (such as cable feeder, sectional circuit breaker, insulation, and metering cabinets) are fully available for OEM partners.
What are the protection grades for the enclosure and the shell?
The sealed enclosure features a protection grade of IP67, while the outer switchgear shell is rated IP4X.