High Voltage Fzw28-12f Sf6 Electric Electrical Air Automatic Recloser Vacuum Circuit Breakers Interrupter Auto Recloser Load Break Switch

Product Description

Our factory

We are professional manufacturer of current transformer ,voltage transformer, Vacuum Circuit Breakers/Recloser,Isolation switches,Dropout Fuse Cut-out,Lightning Arresters,High and Low Voltage Cabinets,Metering Devices,Power Distribution Transformers  etc.


General
 

1.1  New problem of the distribution network as below:

1. When the main trunk circuit is modified, the branch line failure rate is rising;
2. Due to the failure of branch line user and protect mismatch, spread to the whole feeder power outages and lead to liability disputes;
3. Transformer substation grounding selected-line equipment can not satisfy quick find grounding point demand;
4. Due to protective circuits with multilevel add delay, worsening of power network working.
FZW28-12F type excellent solves the problem as above.


1.2  Function of boundary switch (watchdog).

Automatic removal of single-phase grounding fault
When a single-phase grounding fault occurs in the branch line of the user, the tap changer will automatically open, and the users of the substation and other branches on the feeder line will not feel the occurrence of the fault.

Automatic isolation of phase-to-phase short circuit fault
In case of a phase-to-phase short-circuit fault of the user's branch line, the boundary switch shall be opened immediately after the outgoing line protection of the substation trips. After the substation is reclosed, the fault line is automatically isolated, and other branch users on the feeder line quickly recover the power supply (equivalent to a transient fault).

Quickly locate the fault point
After the boundary switch protection action is caused by the fault of the user's branch line, only the responsible user is responsible for the power failure. The fault information shall be actively submitted by the user, and the power company can quickly send personnel to the site for troubleshooting; If the boundary switch is equipped with a communication module, it will automatically send the information to the power management center.

Monitor user load
The boundary switch can be configured with wired or wireless communication accessories to transmit the monitoring data to the power management center to realize remote real-time data monitoring of the user's load.

1.3  The boundary switch complies with GB / T 3804-2004 (3.6kV ~ 40.5kV high voltage AC load switch) and DL (Remote terminal of distribution automation system)

Model Description
 
Main Technical Paramters
 

No.	Item		Unit	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630
4	Rated short-time power frequency withstand voltage	Interphase, to earth(wet)	kV/min	34/1
		Interphase, to earth(dry)		42/1
		Fracture (dry)		49/1
		Secondary circuit to earth		2/1
5	Rated lightning impulse withstand voltage	Interphase, to earth	kV	75
		Fracture		85
6	Rated short-time withstand current and duration		kA/s	20/4
7	Rated peak withstand current		kA	50
8	Rated short-circuit making current(peak)			50
9	Annual Air leakage rate		MPa	≤ 500
10	Main circuit resistance		μΩ	≤550
12	Mechanical life		Times	10000
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

Outline And Installation Dimension

Test Reports
All products have undergone professional testing and certification.
Our Customer

Our customers are located all over the world.
Photos of Product