12kv Pneumatic Type Load Break Switch-Fuse Composite Apparatus

• Customization: Available
• Rated Voltage: 12kv
• Ambient Temperature: -25ºC~+40ºC
• Model NO.: FKRN12A-12D
• The Height Above Sea Level: ≤1000m
• Pollution Grade: II
• Transport Package: Plywood Case
• Trademark: JET
• Origin: China
• HS Code: 85352100

Product Description

Product Description

 

FKRN12A-12D/T125-31.5 Type Indoor AC High-voltage Pneumatic Type Load Break Switch-Fuse Composite Apparatus

 

General Description

FZN12A-12D/T630-20 type indoor AC high-voltage pneumatic type load break switch is three phases AC 50Hz, rated voltage of 12kV. It is used for CO load current, closed-loop current, no load transformer and cable charging current, making short circuit current. With earthing switch, the switch can withstand making short circuit current.

The operating mechanism can be operated by electrical or manual, which is easy to realize remote control.

General Description

FZRN12A-12D/T125-31.5 type indoor AC high-voltage pneumatic type load break switch-fuse composite apparatus is a electrical equipment that combining load break switch and HV current-limiting fuse. Combining any overcurrent between breaking working current and short circuit current; load break switch breaks working current, fuse breaks short circuit current; through striker, the fuse make load break switch to open.

With earthing switch, the switch can withstand making short circuit current.

The operating mechanism can be operated by electrical or manual, which is easy to realize remote control.

Main application

FZN12A-12D type indoor AC high-voltage pneumatic type load break switch is suitable to 12kV and below three-phase power distribution system, as control and protection for transformer, cable and overhead line. It is particularly suitable for terminal substation and box-type substation, and suitable for ring main unit, dual radiation power unit.

FZN12A-12D type pneumatic type load break switch can open and close load current and overload current.

FZN12A-12D type pneumatic type load break switch-fuse composite apparatus can open and close load current, overload current and breaking circuit short circuit current.

Applying ambient conditions

a. Ambient temperature: -25ºC~+40ºC 

b.The height above sea level≤1000m.

c.Relative humidity: the average humidity of a day should be no more than 95%; the average humidity of a month should be no more than 90%.

d. Earthquake intensity: no more than 8 degree.

e.It should be installed in the place without dust, fire, chemical erosion, explosion, vapor and salt spray.

g. Pollution grade: II

Structural features

1. It combines LBS, earthing switch and fuse on one frame. It is compact and with small volume, easy to installation.

2. Direct-acting isolating fracture, high dynamic and thermal stable current;  it can be operated at one time due to unique linkage operating procedures.

3. With insulation cover of fixed contact, it isolates ring main unit on structure, saves isolation plate between phases and gaps, can preventing arc short circuit in switchgear

4. With unique shutter structure, when LBS opening, earthing switch closed and shutter closed, with good protective performance.

5. Load break switch, earthing switch and fuse are in accordance with "5 prevention" mechanical interlock, which can prevent misoperation and is safe and reliable.

6. Charged energy by spring operating mechanism, can closing and opening by electrical and by manual.

Main technical specification

Table 1

S.N.	Name		Unit	Data
				FZN25-12D/T630-20	FZRN25-12D/T200-31.5
1	Rated voltage		kV	12
2	Rated frequency		Hz	50
3	Rated current		A	630	125
4	1min power frequency withstand voltage		kV	between phases and to ground 42; between gaps 48.
5	Lightning impulse withstand voltage (peak)		kV	between phases and to ground 75; between gaps 85
6	Rated short time withstand current (thermal stability current)	LBS	kA		-
		ES	kA	20
7	Rated short circuit duration	LBS	s	4	-
		ES	s	2
8	Rated short circuit making current		kA	50	-
9	Rated active load breaking current		A	630	-
10	Rated closed loop breaking current		A	630	-
	5% active load breaking current			31.5	-
11	Rated cable charging breaking current		A	10	-
12	Rated breaking no load transformer capacity		KVA	1250
13	Rated short circuit breaking current (current-limiting fuse)		kA	-	31.5
14	Rated transfer current		A	-	1200
15	Fuse striker output energy		J	-	1+0.5
16	Mechanical life		times	20000

Table 2

S.N.	Name	Unit	Data
			FZN25-12D/T630-20	FZRN25-12D/T200-31.5
1	Gap clearance	mm	≥175
2	Phase center distance	mm	210±2
3	Air distance between phases	mm	≥125
4	Stroke	mm	210±4
5	Overstroke	mm	≥40
6	Inherent opening time of shunt release	ms	40~65
9	Main circuit resistance	μΩ	≤130

 

FAQ

Q: Could I have prices of your products?
A: Welcome. Please feel free to send us inquiry here. We will reply you within 24 hours
Q: Can l get a sample before the bulk order?
A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.
Q: Can we print our logo/ company name on products?
A: Yes, of course, we accept OEM, then need you to provide brand authorization to us
Q:Do you accept product customization?
A: Yes, of course, please provide specific drawings or parameters, we will quote you after evaluation
Q: What is the lead time?
A: The lead time depends on the quantities ordered, generally within 7-20 days after receiving the payment.
Q: What is your Trade Terms?
A: We accept EXW, FOB, CIF, FCA, etc.
Q: What is your payment method?
A: We accept T/T, Western Union, Paypal, irrevocable L/C at sight, etc
Q: Do you inspect the finished products?
A: Yes, each step of production and finished products wil be came out inspection by Qc department before shipping. And we willprovide goods inspection reports for your reference before shipment
Q: How to solve the quality problems after sales?
A: Take photos of the quality problems and send to us for our checking and confirming, we will make a satisfied solution for you within 3 days.