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  • Name: Cable Distribution box KWDF10-12/24
  • Number: Transmission and Distribution 04

Overview
KWDF10 series high voltage branch box (also known as outdoor cable branch box) is outdoor high voltage electric equipment under rated 12KV or 24 KV and rated 630A, used for connection of power cable.

Structural Feature
With sulfur hexafluoride load switch and tangible shielding silica gel cable joint, the product has strong cutting-off abilities of active load, no-load cable current, and short circuit current. Lightning arrester and grounding fault indicator can be installed in accordance with the requirements of users.
Every ring network line of the product is equipped with load switches or vacuum circuit breakers. Every branch return circuit can freely be cut off and put into operation without imposing effects on other branch circuits of the ring network. Fuses can be attached to load switches. When certain branch loop goes wrong, the fuse can quickly cut off the fault circuit and hit the trip of the load switch to cut off the fault circuit. In this way, the continuity of power supply of other non-fault circuits is guaranteed. 

The Product Meets the Following Standards:
GB3804-2004  3.63kV-40.5kV High Voltage AC Load Switch
GB311.1-1997 Ordination of Insulation of High Voltage Electric Transmission and Transformation Equipment
GB11033.2-1989 Basic Technical Requirements of Rated 26/35kV and Below Power Cable Accessories
GB4208-2008  Enclosure Protection Code (IP Code)
GB11032-2000  AC Gapless Metal Oxide Arrester

Application Scope
The product is widely used in cable branch connection of 10KV or 20KV power systems. Its connection mode is simple, convenient, flexible, safe and reliable. The box body adopts 2mm stainless steel plate, sturdy and durable. In energized parts, entire insulation and sealing structure are chosen. If the flood resistant tangible cable connectors are employed, it can resist flood and greatly improve reliability of power supply. The product is widely used to the power systems of unban industrial areas, residence communities, commercial centers, mine areas, airports, railways, wind power stations, and steel and iron, petroleum, chemical industry, cenment and other industries. It’s especially suitable for the urban road power system transformation projects, greatly saving electric equipment and cable investment and improving power supply reliability.

Normal Service Conditions

  • Altitude: ≤2000m
  • Ambient temperature: +55℃~-45℃; maximum temperature difference: ≤25℃

Places without frequent violent vibration or perennial corrosion.

Main Technical Parameters

Item

Unit

Parameter

Stabilized voltage

kV

12/24

Stabilized current

kA

630

Rated short time withstand current

kA/2s

20/16

Rated peak withstand current

kA

50

Power frequency withstand voltage(effective value )

kV/1min

42/65

Lightning impulse withstand voltage

kV

75/125

Secondary loop power frequency withstand voltage

kV/1min

2

Negative polarity DC withstand voltage

kV/15min

52

Partial discharge

PC

<10

Stabilized current open and close times

Times

100

Stabilized cable charging open and close current

A

10

Stabilized closed loop open and close current

A

630

Mechanical life

Time

5000/2000

Enclose IP code

 

IP33

SF6 gas pressure(relative pressure )

MPa

0.035—0.055

Cable section

m㎡

≤400

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