ZW8-12(G)□ series outdoor high-voltage AC intelligent vacuum circuit breaker (hereinafter referred to as "intelligent circuit breaker"), suitable for three-phase power system of three-phase AC 50Hz, voltage 12kV, used for breaking and closing load current, It has overload and short-circuit protection, quick-break protection, fixed-time delay protection, automatic reclosing function, and can also be equipped with lightning arrester or isolating switch according to user needs.

Smart circuit breakers comply with GB 1984-2014 《High Voltage AC Circuit Breaker》, DL/T 402-2016 《High Voltage AC Circuit Breaker》, DL/T 403-2000 《12kV 40.5kV High Voltage Vacuum Circuit Breaker Ordering Technical Conditions》 and DL/T 721-2013 《Distribution Automation System Remote Terminal》 and other standards.

★ Altitude: no more than 1000m, if the altitude is higher than 1000m, the rated insulation level should be corrected accordingly;

★ Ambient temperature: upper limit +45℃, lower limit -40℃, maximum daily temperature difference 25K

★ Wind pressure: 700Pa;

★ Humidity: Daily average relative humidity ≤95%, monthly relative humidity average ≤90%;

★ Pollution level: e level;

★ Solar radiation intensity: ≥0.1Wcm2

★ Ice coating thickness: ≤10mm

★ Wind speed: 34m/s

★ Earthquake resistance: horizontal acceleration 0.3g, vertical acceleration 0.2g

★ Adopt ceramic vacuum arc extinguishing chamber, strong arc extinguishing ability and short circuit breaking ability;

★ It has the advantages of explosion-proof, anti-condensation, anti-fouling and environmental protection;

★ Using air-silicon rubber and engineering plastic composite insulation to avoid the possibility of insulation accidents caused by oil quality deterioration in oil insulation;

★ The main body can be equipped with an isolating switch to form a "combined electrical appliance" with obvious breaks. On the isolating switch, users can choose to use a silicone rubber insulating sheath, which has the advantages of rain, snow, wind and sand resistance, and strong resistance to pollution and corrosion. Effectively improve the anti-freezing and anti-oxidation ability of the isolating switch;

★ It can realize three-stage protection, zero-sequence earth protection, reclosing and remote communication.

No.	Item		Unint	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630/1250
4	Rated short-time power frequency withstand voltage	Interphase,to earth(wet)	kV/min	42/1
		Interphase,to earth(dry)		48/1
		Break(dry)		34/1
		Secondary circuit to earth		2/1
5	Rated lightning impulse withstand voltage	Interphase,to earth	kV	75
		Break		85
6	Rated short-circuit breaking current		kA	20/25
7	Rated short-circuit making current(peak)			50/63
8	Rated short-time withstand current and duration		kA/s	(20/25)/4
9	Rated peak withstand current		kA	50/63
10	Rated short-circuit breaking current breaking times		Times	30
11	Rated operating voltage and rated voltage of auxiliary circuit		V	AC/DC220、DC48、DC24
12	Main circuit resistance	Without isolation	μΩ	≤80
		with isolation		≤120
13	Mechanical life		Times	10000
Note:if altitude over than 1000m, the rated insulation level should be modify as appropriate