Basic Info.

Model NO.

LW

Model NO.

LW

Product Desciption

 

•1.General structure

•

•The product of type LW-170 HV SF6circuit breaker , with single break structure, adopts self energy  arc interrupting principle in its interrupter . The operating mechanism is of three-phase  electrical group operation. The three poles are install on one frame and controlled by one  spring mechanism.

•The upper of the product is interrupter and the middle is support insulator bushing and frame, and the spring mechanism is in the middle of the frame.

•The electrical control device, density device  and the mechanism energy store device are in the mechanism box.

•                       2.Technical data

•Rated voltage                                           170kV

• Rated frequency                                     50HZ

• Rated current                                         3150A

•Rated short circuit breaking current    31.5kA  ,40kA

•Rated short time withstand current      31.5kA  , 40kA

•Rated short circuit making current      80 kA   ,  100kA

• Rated peak withstand current      80 kA   ,  100kA

• Power frequency withstand voltage for 1 min       325 kV

• Rated Lightning impulse withstand voltage   750 kV

• Rated SF6 gas pressure(200C)      0.6MPa (Required 0.64MPa)

•Total travel                                               180 MM

•Circuit breaker distance                        145 MM

•Operation mechanism                         type CT20-III(X)P spring mechanism

TECHNICAL SPECIFICATIONS CIRCUIT BREAKER
ITEM	CHARACTERISTICS	UNIT	TOTORAS (1) ESMERALDAS (1) PORTOVIEJO(1)	OFFERED TECHNICAL SPECIFICATIONS
			TYPE - C
1	TYPE OF CIRCUIT BREAKER REQUIRED
1.1	Type (similar to)		170 MHM-20 C	LW-170
1.2	Detail type		Tank Live, Single-Phase in SF6	Tank Live, Single-Phase in SF6
1.3	Use		GeneraL	GeneraL
1.4	Opening		Single-Phase	Single-Phase
1.5	Arc extinguishing medium		SF6	SF6
2	REQUIRED QUANTITY		3	3
3	INSTALLATION		Outdoor	Outdoor
4	CHARACTERISTICS OF CIRCUIT BREAKER
4.1	Number of Poles		3	3
4.2	Nominal voltage	kV	170	170
4.3	Dielectric strength and atmospheric impulse at sea level	kVpic	750	750
4.4	Industrial frequency dielectric, a minute at sea level	kV	325	325
4.5	Minimum distance of contouring (pollution level III)	mm	3625	3625
4.6	Nominal frequency	Hz	60	60
4.7	Rated normal current	A	1250	1250
4.8	Nominal current interruption of line vacuum	A	63	63
4.9	Nominal current interruption of cable in vacuum	A	160	160
4.10	Rated short circuit interruption
	-Effective value of the alternating component	kArms	20	20
4.11	Opening of the first polo factor		1.3	1.3
4.12	Reason for increase of the recovery voltage to 100% of the rated breakig capacity	kV/us	2	2
4.13	Nominal capacity of closing short	kA	104	104
4.14	Rated operating sequence		O- 0.3"/CO- 3'-CO	O- 0.3"/CO- 3'-CO
4.15	Rated duration of short circuit	s	1	1
4.16	Rated interruption in discordance of Poles	kA	10	10
4.17	Maximum total interrupt time	ms	50	50
4.18	Mechanism of operation (closing - Shooting)		Engine - Spring	Engine - Spring
4.19	Drive mechanism		Single-Phase	Single-Phase
4.20	Number of circuits independent of firing 125 Vdc		2	2
4.21	Mechanical strength (standard IEC 62271-100) class		M2	M2
4.22	Kind of electrical resistance (standard IEC 62271-100)		E2	E2
4.23	Voltage control and engine	VDC	125	125
4.24	Voltage of auxiliary services	VAC	120	120
4.25	Terminal connector for AAC 1033 kcmil conductor	YES/NO	Yes	Yes
4.26	Insulators material		Porcelain	Porcelain
4.27	Metal support structure	YES/NO	Yes	Yes