High-Performance 24kv Load Break Switch with Overload Protection

• Customization: Available
• Rated Voltage: 24kv
• Ambient Temperature: -10ºC~+40ºC
• The Height Above Sea Level: No More Than 1000m
• Seismic Intensity: Below 8 Degrees
• Transport Package: Plywood Case
• Origin: China
• HS Code: 85352100

Product Description

FN12-24DType Indoor AC High-voltage Pneumatic Type Load Break Switch

FN12-24RD Type Indoor AC High-voltage Pneumatic Type Load Break Switch-Fuse Composite Apparatus

 

1 General description

1.1 FN12-24RD series HV puffer-type load switch and its composite apparatus is AC 24kV, 50Hz indoor high-voltage switch. The load switch with high technical parameters and reliable movement, its basic operating type is by manual, but also can be equipped with electromagnet spring operating mechanism. Based on puffer arc-extinguishing principle, it can break repeatedly, no need to change vacuum interrupter. Under normal circuit condition, high-voltage load switch can make, bear and break load current, and has the ability to make short-circuit current, and bear short-circuit current in certain times.

FN12-24RD series load switch can be installed with earthing switch. The earthing switch has the same capability of short-circuit making and dynamic stability with load switch, and has strict mechanical interlock with load switch, which structure ensure no misopertion.

1.2  When FN12-24RD series load switch installed with high-voltage current-limiting fuse (with striker), make a load switch-fuse composite apparatus, as overload and short-circuit protection of load (such as power transformer). When one or more phases of fuse melted down, three phases of load switch open automatically. High-voltage load switch is suitable to install in ring main unit and other switchgear types, used as accepting and distributing power.

1.3 Applying ambient conditions:

a. Ambient temperature: -10ºC~+40ºC.

b.The height above sea level: no more than 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. Seismic intensity: below 8 degrees.

1.4 Standard

GB3804-2004 3~63kV AC HV Load Switch

GB16926-2009 HV AC Load Switch-Fuse Composite Apparatus

2 Main technical specification

Table 1 Main technical specification of load switch and earthing switch

S.N.	Name	Unit	Data
1	Rated voltage	kV	24
2	Rated frequency	Hz	50
3	Rated current	A	630
4	Max. rated current of fuse	A	100
5	Rated active load breaking current, rated closed loop breaking current	A	630
6	Rated short time withstand current (2S)	kA	20
7	Rated short circuit making current, rated peak withstand current	kA	50
8	1min power frequency withstand voltage, between phases and to ground/gap	kV	65/79
9	Lightning impulse withstand voltage (peak) between phases and to ground/gap	kV	125/145
10	rated cable-charging breaking current	A	16
11	Rated breaking no-load transformer	kVA	1250
12	Mechanical life	times	2000
13	Rated breaking transfer current	A	1050
	Rated short circuit breaking current of fuse	kA	31.5

Table 2  Main mechanical characteristics of load switch

S.N.	Name	Unit	Data		Remark
1	Phase distance	mm	300±3
2	Total stroke of conducting rod	mm	290±5
3	Contact clearance of fixed and moved contact at opening position	mm	>215
4	Electrical contact overstroke of moved contact rod	mm	42±3
5	Closing speed when first touch	m/s	2.8	+0.7
				-0.2
6	Opening speed when first touch	m/s	>1.7
7	Non-synchronism of three-phase closing	ms	≯10		Contact ofmoving contact rod and contact finger
8	Non-synchronism of three-phase opening	ms	≯5		Separation of moving contact rod and contact finger

Table 3  Main mechanical characteristics of earthing switch

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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.