High-Voltage and Low-Voltage Pre-Assembled Substations (European Type)
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Service Conditions
●Altitude not exceeding 2000 m;
●Ambient temperature: -25°C to +40°C;
●Relative humidity: at 25°C, the daily average shall not exceed 95%, and the monthly average shall not exceed 90%;
●Installation environment: Locations free from fire, explosion hazards, conductive dust, corrosive chemical gases, and severe vibrations. If not, users may
consult with our company
Functional features
●The high-voltage switchgear, distribution transformer, low-voltage switchgear, energy metering device, and reactive power compensation device are combined according to configuration,
resulting in a highly integrated system.
●It has complete high/low voltage protection, ensures safe and reliable operation, and requires simple maintenance.
●Small land occupation, low investment, short production cycle, and easy movement;
●Flexible and diversified wiring schemes;
●Unique structure: The honeycomb-shaped double-layer (composite board) housing has high mechanical strength, good thermal insulation and heat dissipation, strong ventilation, beautiful appearance, and high protection grade.
The housing materials can be made of stainless steel-titanium alloy, aluminum alloy, cold-rolled sheet, and color-coated steel sheet.
●Multiple arrangement forms available: ordinary type, villa type, compact type, etc.
●The high-voltage ring main unit can be equipped with a power distribution automation terminal (FTU), which can reliably detect short-circuit and single-phase grounding faults, and has the "four-remote" function, facilitating
automation transformation of the distribution network.
transformer
Intelligent integrated substations use low-loss, oil-immersed, fully sealed S9, S10, S11 series transformers, or environmentally friendly dry-type
transformers with resin insulation or NOMEX paper insulation. Some have a trolley for easy installation and removal of the
transformer.
high-voltage side
Smart integrated substations generally adopt load switch-fuse combined protection on the high-voltage side. When a fuse in one phase is blown, the three phases are
simultaneously cut off. The load switch can be pneumatic, vacuum, sulfur hexafluoride, etc., and can be equipped with an electric operating mechanism to achieve automation. The fuse
is a high-voltage current-limiting fuse with an impactor, which has reliable action and high breaking capacity. See the table below for main technical parameters. For transformers with capacity over 800 KVA, vacuum circuit breakers such as ZN12, ZN28, and VS1 can be selected
low voltage side
The main switch on the low-voltage side adopts a universal or intelligent circuit breaker with selective protection. The outgoing switch adopts an advanced molded case switch, with small volume,
short arc, and up to 30 outgoing lines. The intelligent automatic reactive power compensation device is available in both contactor and non-contact types for users.
selection
