China DSR6-12/24/40.5 SF6 Gas Insulated Switchgear Suppliers - Reliable Factory Solutions for Medium-Voltage Power Distribution
Model and meaning
Work environment
Altitude≤ 5000m (when it runs at an altitude over 1000m, pay special attention).
Ambient temperatureHighest +50°C, lowest -25°C, 24h average ≤ 35°C.
Ambient humidity24h relative humidity average ≤ 95%; monthly relative humidity average ≤ 90%.
Electromagnetic interferenceThe amplitude of electromagnetic interference induced in the secondary system ≤ 1.6kV.
Installation environmentNo 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.
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) | 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 | UP4X | |||
| 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 formulation: 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 is the maximum operational altitude for this switchgear?
The switchgear is designed for installation at altitudes ≤ 5000m. However, special attention must be paid and consultations made if it runs at an altitude exceeding 1000m.
What type of insulation gas does the switchgear use and what is its pressure?
The switchgear uses SF6 (Sulfur Hexafluoride) insulation gas. The rated charge pressure is 0.14 MPa (abs. 20℃) and the minimum charge pressure is 0.12 MPa (abs. 20℃).
What are the protection grades of the sealed enclosure and the switchgear shell?
The sealed enclosure is rated at IP67, providing high protection against dust and water immersion. The outer switchgear shell is rated at UP4X.
What is the mechanical life of the core switching elements?
The circuit breaker has a mechanical life of 10,000 operations, and the three-position switch is rated for 5,000 operations.
Are these modular switchgear units available for OEM customization?
Yes, all the listed functional modular units (including cable feeder, sectional, insulation, metering, and grounding cabinets) are fully available for OEM partners.