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1250A 2000A HV High Voltage Disconnecting Switch For 145kV Substation

Categories High Voltage Disconnecting Switch
Brand Name: HERONG ELECTRIC
Model Number: GW4
Certification: ISO9001
Place of Origin: XI'AN CHINA
MOQ: 1PC
Price: Negotiable
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 1000SET/YEAR
Delivery Time: 30-45 DAYS
Packaging Details: Export wooden packing
Type: High-voltage
Structure: Double-column Disconnector
Installation: Outdoor High-voltage
Operation: Electric
Grounding Mode: Grounding
Movement Mode: Horizontal Rotary Type
Company Info.
herong electric
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    1250A 2000A HV High Voltage Disconnecting Switch For 145kV Substation

    GW4-145/1250, 2000 outdoor high voltage disconnector


    1. General
    1.1 Model
    GW4-145/1250, 2000 outdoor high voltage disconnector
    1.2 Function
    Type GW4-145 disconnector is used to switch for the high-voltage line under off-load circumstance, as well as electric isolation between electric equipment as high voltage busbar, circuit breaker being maintained. It provides visible insulation distance in accordance with safety requirement.
    1.3 Operation mechanism and model
    Each disconnector equips one CJ6B motor drive mechanism or CS17 manual mechanism. For single earthing switch, it should be equipped one CS17 manual mechanism and for double earthing switch, it should be equipped two CS17.
    1.4 The products are widely applied to 145kV substation depends on its simple structure, convenient installation and reliable running.
    2. Environment requirement
    2.1 Environment temperature: -25ºC~+40ºC;
    2.2 Altitude: ≤4500m.
    2.3 Wind pressure: ≤700Pa.
    2.4 Thickness of covered ice: ≤10mm.
    2.5 Creepage distance of insulator: 2.5cm/KV, 3.1cm/KV
    2.6 No frequent sharp shock or harmful materials such as flammable, explosive, and chemical corrosion around the installation site.
    3. Technical data
    3.1 Main technical data

    Data Model
    Item
    GW4-145Remark
    Rated voltage (kV)145
    Rated current (A)12502000
    Rated short-time withstand
    current of disconnector (kA)
    31.5403s
    Rated peak value withstand
    current of disconnector (kA)
    80100
    Rated short-time withstand
    current of earthing switch (kA)
    31.5403s
    Rated peak value withstand
    current of earthing switch (kA)
    80100
    Rated insulation levelPower frequency withstand voltage (1min, kV) (Effective value)To earth275
    To break315
    Lightning impulse
    withstand voltage (kV) (1.2/50μs, peak value)
    To earth650
    To break750
    Rated mechanical load of connection terminal (N)750750
    *Resistance of main switch circuit (μΩ)≤140≤95
    **Resistance of earthing switch circuit (μΩ)≤300≤300

    3.2 Main technical parameter
    Table 2

    ModelChecked pointsSizeRequirement of three poles close on the same time
    GW4-145Distance between disconnector breaks≥1550≤15mm
    Distance between earthing switch breaks≥1320≤15mm

    4. Category
    The product can be categorized into three types:
    Without earthing, single earthing (left earthing or right earthing) and double earthing
    Structure and operation principal:
    GW4 series disconnectors are characterized by horizontal rotary, making and breaking, two-pole; it mainly consists of supporting base, rotary insulator, conducting components and operation mechanism. The insulators on the both ends of each pole are fitted on the bearing support of supporting base; inside the bearing support is rolling bearing, which is flexible and light to be operated. There are fixed and moving contacts and in-and-out outlets. The operation mechanism will turn one insulator an angle of 90°, another insulator of same phase will be reversely driven by cross linking rod at an angle of 90°, thus the disconnector will open or close towards one direction, the linking rod on each pole of the other two ones will make or break after its linkage. An interlocking device is equipped between the main switch and earthing switch to guarantee only one of both switches can make or break when another one acts effectively.
    According to customers, the manual mechanism can be affiliated with electromagnetic lock to realize the interlocking among the main switch, earthing switch and breaker; therefore, thus preventing the incorrect operation from occurring, meanwhile, motor drive mechanism also can be used together with this switch..
    Major features:
    1. The supporting and revolving plate of porcelain insulator adopts the precise casting technique to take place of the usual welding technique, improving the ability of corrosion-resistance, strength and shape.

    2. The base frame and bearing support: the base frame, made of shape steel, is connected with bearing support by assembling method; the surface of base frame adopts hot galvanizing technique to improve the corrosion resistance. Excellent sealing performance of bearing support with superior lubrication oil filled inside it, with which it can maintain flexility for the long time when it turns, and even will not be blocked due to rust.

    5. Terminal block adopts flexible connection instead of previous roller movement, thus, improve reliability of the whole switch.

    7. Adopt the connection of lathe dog between main switch and mechanism, they are easily operated and not in need of welding on site.

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