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DRM-24 SF6 Gas Insulated Switchgear 24KV
High Voltage Switchgear Series

DRM-24 SF6 Gas Insulated Switchgear 24KV

DRM-24  The DRM-24 inflatable SF6 metal enclosed fully insulated series ring network switchgear independently developed and produced by the company has passed the type test of the national high voltage electrical test center,Widely used in 24kV power distribution system, it is the preferred switch product for all kinds of users in urban and rural areas.

The switchgear is modular unit mode, which can be combined according to different uses; it consists of fixed unit combination and expandable unit to meet the needs of flexible use of compact switchgear in various substations.

The DRM-24 inflatable switchgear is a completely sealed system with all live parts and switches enclosed in a stainless steel housing. The entire switching device is not affected by external environmental conditions, thus ensuring operational reliability and personal safety, and achieving maintenance-free. By selecting an expandable bus, any combination can be achieved to achieve full modularity, Extended bus safety insulation and shielding ensure high reliability and safety,. DRM-24 inflatable switchgear can also provide TV-oriented automation solutions, forming the concept of intelligent switches, and minimize the workload of on-site installation and commissioning.
The design life of operation under indoor conditions (20'c) is more than 30 years.

    Model and meaning

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    Product conformity

    ◆International standard

    IEC60056,IEC60298,IEC60129,IEC60420,IEC60265,IEC60694,etc.

    ◆Chinese standard

    GB3804,GB3906,GB11022,etc.

    Normal service condition

    suitable for high and low temperature (+40°C ~-40°C), wet, dusty, salt pollution, mine, high altitude (less than 4000 meters) and other environments.short-term immersion within 24 hours does not affect the use.

    Note: If the altitude is higher, please indicate the specific altitude.

    Main features of product

    ◆DRM-24 series gas cabinet SF6 gas as arc extinguishing and insulation medium.

    ◆Switch cabinet is fully sealed, fully insulated structure; Bus bars, switches and live parts are completely enclosed in stainless steel housing.

    ◆The chamber is filled with 0 04Mpa SF6 gas, the protection level is up to IP67: The whole switch device is completely unaffected by the external environment, even in extreme cases such as short-term flooding can ensure the normal operation of the switch, and the product is maintenance-free for life.

    ◆The switchgear has a perfect "five prevention" interlock device, which completely prevents personnel and equipment operation failures caused by human error.

    ◆All switchgear has a reliable safe pressure relief channel, which can guarantee the personal safety of the operator even in extreme circumstances.

    ◆Switchgear is divided into two categories: fixed unit combination and expandable unit combination.

    ◆The switch cabinet usually enters and exits from the front, and can also realize side exit or side expansion according to different installation positions.

    ◆The size of the cabinet is easy to install, and can be suitable for small space and poor environmental conditions.

    ◆The switch cabinet can be configured with electric, remote control and monitoring devices according to different needs of users.

    Flexible outlet and expansion methods

    All DRM-24 modules can be connected by side outlet and side expansion or side outlet and top expansion according to user requirements, which meets the needs of power supply schemes to the maximum extent.

    Performance index

    Sf6 gas pressure                                     The absolute pressure at 20°C is 0.04Mpa

    Annual gas leakage rate                               0.05%

    Class of protection                                          IP67

    Air chamber stainless steel thickness        The 3.0 mm

    Bus bar

    Switchgear inside the bus                             400mm²Cu

    Switchgear ground bus                                  150mm²Cu

    colour

    Switch cabinet front panel                                                RAL 7012

    Side panel and cable room front cover plate              RAL 7035

    Meet the criteria

    GB/T11022 GB3906 GB1985 GB3309

    GB16926 GB38041 GB1984

    IEC60056 IEC60129 IEC60256

    IEC60298 IEC60420 IEC60694

    Normal operating environment conditions

    Maximum temperature                                     40℃

    Minimum temperature                                      To 40 °C

    Maximum mean relative humidity                 ≤ 95%

    Sea level                                                               ≤ 2000 m

     

    Main technical parametersin

    Name

    C module

    F module

    V module

    CB module

    Load switch

    Combination apparatus

    Vacuum switch

    Isolation/ground switch

    Vacuum circuit breaker

    Isolation/ground switch

    Rated voltage kV

    24

    24

    24

    24

    24

    24

    Rated frequency Hz

    50/60

    50/60

    50/60

    50/60

    50/60

    50/60

    Power frequency withstand voltage(phase/ fracture)kV

    65/79

    65/79

    65/79

    65/79

    65/79

    65/79

    Lightning impulse withstand voltage kV

    125/145

    125/145

    125/145

    125/145

    125/145

    125/145

    Rated current A

    630

    note

    630

    630

    630

    630

    Breaking capacit

    Rated closed-loop breaking current A

    630

     

     

     

     

     

    Rated cable charging breaking current A

    10

     

     

     

     

     

    Rated short circuit closing current(peak)A

    50

     

     

     

     

     

    Rated peak withstand current kA

    50

    80

     

     

     

     

    Rated short-time withstand current kA/3s

    20

     

     

     

     

     

    Rated short circuit breaking current kA

     

    31.5

    20

     

    20

     

    Rated transfer current A

     

    1400

     

     

     

     

    Fuse maximum current A

    -

    63

     

     

     

     

    Loop resistance-n

    ≤200

    ≤400

     

     

     

     

    Mechanical life(second)

    5000

    3000

    5000

    5000

    5000

    5000

    (Note: 1) depends on the current rating of the fuse.

    DRM-24 type switch cabinet structure

    20241106-德锐电气(2024版)(中英文)最终定稿版-35.jpg

    1- Fuse room

    2-Capacitive voltage indicator

    3- Short circuit ground fault indicator (accessories)

    4-Pressure indicator

    5-Standard with serial number

    6-Analog circuit diagram

    7- Fuse fuse indicator

    8- Padlock device on the panel

    9- Cable room

    10- RTU installation room

    11-interlocking(Accessories)

    12-Circuit breaker operating hole

    13- Load switch operating hole

    14- Ground switch operation hole

    15-lsolation switch operating hole

    16-Switch button

    17- Closing button

    All kinds of non-extended standard combination unit cabinets

    Non-extended standard module

    The following 15 standard package combinations are available

    Each module of the DRM-24 switchgear has the following configurations

    D Cabinet - Lifting module

    Standard configuration and features in "Cable Connection Module without ground Knife'

    Cabinet C- Load switch module

    Standard configuration and features in "'Load Switch Module"

    Cabinet F - load switch fuse combination electrical module

    Standard configuration and features in "Load Switch Fuse Combination Electrical Module"

    V Cabinet -Vacuum switch module

    Standard configuration and features in Vacuum Switch Module

    Each module of the DRM-24 switchgear has the following configurations

    ◆Capacitive voltage indicator for inlet bushing

    ◆Install a pressure gauge for monitoring Sf6 density in each air chamber

    ◆Lifting lug for lifting

    ◆Operating handle

    Assorting

    ◆Electric operating mechanism

    ◆Cable short circuit and ground fault indicator

    ◆Current transformer and meter

    ◆Remote monitoring and connection

    All kinds of non-extended standard combination unit cabinets

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