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High-voltage cable junction box (American)DFW-12(24)

Product Description:

In the 3.6-24kV cable line system, high-voltage cable junction boxes have become the main equipment for distribution network cable engineering due to their all-insulated, fully sealed, and fully shielded characteristics, as well as their simple, convenient, and flexible connection methods. It saves investment of equipment and cable, improves power supply reliability, and ensures personal safety.

DFW series have inflatable cable junction boxes and sleeve type (European style) cable junction boxes according to their different structural forms and types of cable joints. The inflatable cable junction box is classified into two types: junction boxes with switch (load switch type, circuit breaker type) and junction boxes without switch.

The internal design of inflatable cable junction box with switch is compact, equipped with RN8 gas insulated ring network switchgear (SF6 load switch, circuit breaker) imported from Rodealer Technology in France. The circuit breaker protection is controlled by a high-performance electronic controller with self-powered relay protection capability, and is equipped with remote control, RTU etc for selection; You can also choose to gradually upgrade from manual to electric or automatic. The high-performance spring operating mechanism has a simple structure, flexible operation, reliable interlocking locking device. Its speed of opening and closing is not only fast but also unaffected by manpower. With the modular design, the internal air box can be flexibly combined into various distribution schemes to meet the needs of different and users.


Technical parameter:

Inflatable cable junction box(without switch)

No.

Component name

Unit

Technical parameter

1

Rated voltage

kV

12

24

2

Rated frequency

Hz

50

3

Rated current

A

630

4

Rated short-time duration

s

3

5

Rated short-term withstand current (effective value)

kA

20

6

Rated peak tolerant current

kA

50

7

Rated insulation level

1min power-frequency withstand voltage

phase-phase, phase-earth

kV

42

50

Isolation fracture

---

Lightning impulse withstand voltage

phase-phase, phase-earth

kV

75

95

Isolation fracture

--

Auxiliary and control circuits

kV

2

8

Rated gas pressure

Mpa

0.02

0.03

9

Annual air leakage rate


≤0.5%

≤0.1%

10

Protection degrees of the  shell

Outer box


IP33

Inflatable box

IP67

11

Maintenance cycle of inflatable box

年

30（maintenance-free）


2. 套管式（歐式）電纜分接箱

序號(hào)

項(xiàng)目

單位

參數(shù)

1

額定電壓

kV

12

24

2

額定頻率

Hz

50

3

額定電流

A

630

4

額定短時(shí)持續(xù)時(shí)間

s

3

5

額定峰值耐受電流

kA

50

6

1min工頻耐受電壓

kA

42

50

7

雷電沖壓耐壓

kA

75

95

8

防護(hù)等級(jí)


IP33


Technical features and advantages:

a. Using fully insulated, sealed, and shielded cable connections to ensure personal safety.

b. Dust proof, flood resistant, corrosion-resistant, suitable for harsh environments.

c. Small size, compact structure, simple installation, convenient operation, and maintenance free.

d. A live display can be installed to remind operators that the circuit is live.

e. Cable fault indicator can be installed for quick identification of cable faults.

f. The box is made of stainless steel with spray paint on the outside, and there are multiple colors to choose from.