Indoor AC High-Voltage Sulfur Hexafluoride Ring Main Unit Switchgear
XGN15-12Customized according to drawings and needs
The XGN15-12 indoor AC high-voltage sulfur hexafluoride ring main unit (hereinafter referred to as "switchgear") is designed for ring or radial power supply systems with a rated voltage of 12kV and a rated current of 630A or less. It is particularly suitable for installation in prefabricated substations as a control and protection device for power systems. This product is equipped with an FLN36-12D type sulfur hexafluoride load switch or FLN36-12D type circuit breaker-fuse combination unit with an insulating enclosure. It features a compact size, light weight, easy operation, low operating force, reliable interlocking, and maintenance-freel operation. It represents a new generation of high-voltage switchgear required for urban power grid renovation and construction.
This product complies with the following standards: GB3906 "Metal-enclosed Switchgear for AC 3-35kV". GB/T11022 "Common Technical Requirements for High-voltage Switchgear and Controlgear", IEC62271-200 "Metal-enclosed Switchgear and Controlgear for AC Voltages up to 50kV", and DL/T404 "Technical Conditions for Ordering Indoor AC High-voltage Switchgear".
-
Structural Features
Switchgear is composed of a cabinet, main switch (SF6 load switch or combined electrical apparatus), grounding switch, instrument room, busbar and other electrical components and auxiliary components. The cabinet is formed and assembled by aluminum-zinc coated steel plates through modularization. A pressure relief channel is provided at the back of the cabinet to protect the operator in case of internal faults. The busbar in the busbar room is covered with insulation and directly connected to the terminal of the load switch. The three-phase busbars are arranged longitudinally, allowing the switchgear to be expanded on the left side at will and making it easy to change its layout. The instrument room is located at the top of the switchgear, and current meters, voltage meters, indicator lights and electric operating mechanisms can be installed inside.
Usage environmentAmbient air temperature: -15°C to +40°C, altitude: 1000m and below, humidity conditions: daily average no more than 95%, water vapor pressure daily average no more than 2.2kPa, monthly average no more than 90%, water vapor pressure monthly average no more than 1.8kPa, seismic intensity, no more than 8 degrees, no corrosive or flammable gases or other obvious pollution. Note: When the normal use conditions exceed the above, users can negotiate with our company.
-
Item
Unit
Parameter
XGN15-12（F）
XGN15-12（FR）
Rated Voltage
kV
12
12
Rated Frequency
Hz
50
50
Main Busbar Rated Current
A
630
630
Maximum Rated Current of Fuse
A
----
125
Rated Short-Time Withstand Current /
Rated Short-Time Withstand Time
kA/s
20/3
---
Rated Short-Circuit Breaking Current
kA
----
31.5
1-minute Power Frequency Withstand Voltage、 Phase-to-Phase, Phase-to-Ground / Break
kV
42/48
42/48
Lightning Impulse Withstand Voltage, Phase-to- Phase, Phase-to-Ground / Break
kV
75/85
75/85
Protection Grade
IP 3X
IP 3X
Item
Unit
Parameter
XGN15-12（F）
XGN15-12（FR）
Rated short-time withstand current of grounding circuit / rated short-circuit duration
kA/s
20/2
20/2
Rated peak withstand current and rated short -
circuit making current
kA
50
50
Rated active load breaking current
A
630
630
Rated closed-loop breaking current
A
630
630
5% rated active load breaking current
A
31.5
31.5
Rated cable charging current
A
10
10
Rated breaking capacity of no-load transformer
kVA
----
1250
Rated transfer breaking current
A
----
1700
Mechanical life
operations
2000
2000