ZW32-24 Outdoor Vacuum Circuit Breaker

Selection

Operating conditions

1. Ambient air temperature: The daily temperature variation: -40℃ ~+40℃ diurnal variation of temperature less than 25℃; 2. Altitude: no more than 2000 meters 3. Wind speed is no more than 35m/s (equivalent to 700Pa on the surface of the cylindrical); 4. Ice cover thickness no more than 10mm; 5. The intensity of sunshine not more than 1000W/m ² 6. Pollution degree no more than GB 5582 IV class 7. Seismic intensity does not exceed 8 class 8. No flammable, explosive, chemical corrosion and severe vibration place 9. the conditions of use exceed the above-mentioned regulations, it shall be determined through consultation between the user and the manufacturer.

Quoted standard

1. GB 1984-2003 AC high voltage circuit breaker 2. GB 3309-1989 Mechanical test of high voltage switchgear at room temperature 3. GB 5582-1993 The pollution level of insulating high voltage electric power equipment 4. GB 1985-2004 AC high voltage isolation switch and earthing switch 5. GB/T 11022-1999 Common technical requirement for high voltage switch equipment and control equipment standard 6. GB 16927.1-1997 The first part of high voltage test techniques: General test requirements 7. DL/T 402-2007 Technical conditions for AC high voltage circuit breaker order 8. DL/T 593-2006 The common technical specification of high voltage switch equipment and control equipment standards

Technical data

Table 1

Item					Unit	Parameter
Rated voltage					kV	24
Rated insulation level		1min Power frequency withstand voltage		Dry test	kV	65/79 (isolation fracture)
				Wet test	kV	50/64 (isolation fracture)
				The auxiliary circuit and control circuit	kV	2
		Lightning impulse withstand voltage (peak)			kV	125/145 (isolation fracture)
Rated frequency					Hz	50
Rated current					A	630, 1250
Rated operating sequence						O-0.3s-CO-180s-CO
Rated short-circuit breaking current					kA	16	20	25
Rated short-circuit closing current (peak)					kA	40	50	63
Rated peak withstand current					kA	40	50	63
Rated short-time withstand current					kA	16	20	25
Rated short circuit duration					S	4
Rated short-circuit breaking current times					Times	20/25
Breaking Times of rated current					Times	10000
Closing time					ms	20~80
Opening time	Under maximum operating voltage				ms	20~80
	Under rated operation voltage				ms	20~80
	Under lowest operating voltage				ms	20~80
Full off time					Times	≤100
Mechanical life					J	10000
Switch on power					W	70
Energy storage motor rated input power					V	≤70
Rated operational voltage and auxiliary circuits rated voltage					V	DC, AC 220
Energy storage time under rated voltage					S	≤8
Overcurrent release			Rated current		A	5
			Tripping current accuracy		%	±10

Circuit breaker after assembly and adjustment should meet the requirements of Table 2

Item	Unit	Parameter
Open clearance between contacts	mm	13±1
Contact overtravel	mm	3±1
Average opening speed	m/s	1.5±0.2
Average closing speed	m/s	0.8±0.2
Contact closing bounce time	ms	≤3
Three-phase tripping over the same period of time	ms	≤2
DC resistance of circuit for every phase (with isolating switch)	μΩ	≤60(150)
Allowable wear thickness for dynamic and static contact	mm	3
Phase center distance	mm	380±1.5
The closing state rated contact spring pressure	N	2000±200

Circuit breaker equiped isolation switch rated parameters

Item		Unit	Parameter
Rated voltage		KV	24
Rated frequency		Hz	50
Rated current		A	1250
Rated peak withstand current		kA	50
Rated short-time withstand current		kA	20
Rated short circuit duration		s	4
Mechanical life		Times	2000
Isolation switch fracture operation torque		N*m	≤300
Contact blade spring pressure		N	300±30
Rated terminal static mechanical load	Horizontal longitudinal load	N	500
	Horizontal transverse load	N	250
	Vertical force	N	300

Overall and mounting dimensions(mm)

1. lower outlet 2. current transformer 3. upper inlet 4. insulating pillar 5. the vacuum interrupter 6. wire guides 7. flexible connection 8. insulated tension pole 9. actuator 10. case