Full Metal Enclosed Ring Main Unit
  • Full Metal Enclosed Ring Main UnitFull Metal Enclosed Ring Main Unit

Full Metal Enclosed Ring Main Unit

Keeya, a reputable manufacturer, proudly presents the Full Metal Enclosed Ring Main Unit, blending advanced technology with cost-effective solutions. We prioritize delivering high-quality products at competitive prices, ensuring that our Full Metal Enclosed Ring Main Units stand out as reliable and affordable solutions. Partner with Keeya to access top-notch manufacturing expertise, cost-effectiveness, and excellence in the realm of fully metal-enclosed ring main units. Trust us for innovative solutions that meet your needs while staying within your budget.

Model: XGN□-24KV

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Product Description

Keeya, a leading manufacturer, proudly presents the Full Metal Enclosed Ring Main Unit, combining cutting-edge technology with a commitment to cost-effectiveness. Our dedication to providing high-quality products is matched by our focus on delivering competitive prices. Keeya stands as a trusted source for cost-efficient solutions in the domain of full metal enclosed ring main units. Partner with us to access top-tier products that prioritize both quality and affordability.


Increase the capacity of main transformer and improve the power supply capacity of substation.

Improve the power transmission capacty of distrilbution lines and reduce the number of distribution lines.

Increase the power supply radius of medium voltage lines.

Improve the power supply quality of medium voltage power grid.

Reduce the power loss of medium voltage power grid.

Save nonferrous metals and land resources.


Model and meaning


Service condition

● Altitude: ≤1000m

Ambient temperature: maximum ambient temperature +40℃, minimum ambient temperature -35℃,maximum daily temperature difference 25℃;

● Relative humidity: daily average relative humidity ≤95%, monthly average relative humidity ≤90%;

● Seismic intensity: 8 degree;

Rated frequency of system: 50HZ;

Annual leakage rate of SF6: ≤0.1%;

Enclosure protection grade: IP3X;

● Note: when ordering this product beyond the above conditions, please consult with our company.


Executive standard

● GB/T156 Standard voltages

● GB 311.1 Insulation co-ordination-Part 1:Definitions,principles and rules;

● GB 38043.6kV~40.5kV High-voltage alternating current switches for rated voltage above 3.6kV and less than 40.5kV GB 3906 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV;

● GB/T 11022 Common specipcations for high-voltage switchgear and controlgear standards;

● GB/T 12,022 Sulfur hexafiuoride for industrial use;

● GB16926 High-voltage alternating current switch-fuse combinations;

● DL/T 404 Indoor AC high voltage switchgear panel Fully metal enclosed ring main unit


Technical parameter

No.

Name

Unit

Load switch cabinet

Switch-fuse combination cabinet

1

Rated voltage

kV

24

2

Rated frequency

Hz

50

3

Rated current

A

630

125

4

Rated load breaking current

A

630

125

5

Rated short-time withstand current (effective)(3s)

kA

20

6

Rated peak withstand current

kA

50

7

Closed loop breaking current

A

630

8

Maximum transfer current

A


31.5

9

Prospective short-circuit breaking current of fuse(effective)

kA


1400

10

2s short time withstand current of grounding switch

kA

20

11

Rated current breaking times

Time

≥100

12

Mechanical life

Load switch

≥2000

Grounding switch

≥2000

13

Annual leakage rate of SF6 gas

Annual leakage rate of SF6 gas

%

≤0.1






14

 Rated short-time power frequency withstand voltage(effective)

Across isolating distance

kV

64(79)

Switch opening distance

kV

64(79)

Phase to phase, phase to ground

kV

50(65)

rated lightning mpulse withstand voltage (peak)

Across isolating distance

kV

110(145)

Switch opening distance

kV

110(145)

Phase to phase, phase to ground

kV

95(125)

15

Temperature rise limit

K

According to GB/T11022

16

Operating mechanism


Manual, or electric plus manual

17

Operating voltage

V

recommended DC110, optional DC24 or DC48 AC220

18

Creepage distance of insulating parts in cabinet

mm/kV

≥20(24kV)220(calculated as per24kV)

19

Enclosure protection grade


IP3X

20

Clear air distance of bare conductor(phase to ground and phase to phase)

mm

≥180

21

Rated cable charging breaking current

A

25

22

Switching inductance current of no-load transformer

A

0~15A

23

Opening and closing asynchrony

ms

<5

24

Main circuit resistance (excluding fuse)

μΩ

<140

Note:The rated current of the switch-fuse combination is used for the complete combined apparatus of the load switch and the selected fuse.The data outside the brackets refer to the neutral point grounding system through low resistance,and the data inside the brackets refer to the neutral point grounding or ungrounded system through arc suppression coil.


Fully metal enclosed ring main unit

Outline size


Outline diagram of incoming (outgoing)line cabinet

Purpose of switch cabinet

Cabinet width(mm)

Cabinet depth(mm)

Cabinet height(mm)

Incoming cabinet

750

1020

1900

Outgoing cabinet

500

1020

1900

cabinet

500

1020

1900

Buscouple cabinet

500

1020

1900

Vice bus couple cabinet

500

1020

1900

Bus transition cabinet

500

1020

1900

Metering cabinet

1120

1020

1900

Note:

1.The nominal depth of the switch cabinet includes all the outer edges of the door panel (excluding the convex elements, locks, pins, and the convex parts of the door panel)

2.The nominal height of the switch cabinet,including all the outer edges of the head (excluding convex rings)






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