ZW26-12 series outdoor high-voltage vacuum circuit breakerDetailed product description：

·Product Overview:

The ZW26-12 series outdoor high-voltage vacuum circuit breaker combines the advantages of domestic column mounted vacuum circuit breakers and avoids the disadvantages of three-phase public box type that may cause accidents in harsh external environments. Absorbing mature experience in circuit breakers from ABB and COOPER companies, leading in performance compared to similar domestic products. It better meets the needs of the electricity sector and is the new generation of outdoor high-voltage vacuum circuit breakers that China is leading in this field.  

This circuit breaker is suitable for three-phase power systems with AC 50Hz of 12KV and below, and is used for breaking and closing load currents, overload currents, and short-circuit currents. It can also be combined with distribution automation devices to form reclosers, sectionalizers, and achieve "four remote" control functions, forming intelligent control equipment.  
·Model and its meaning:

·Usage environment:
1. Altitude: not greater than 2000 meters (3000m is the height prototype).
2. Surrounding air temperature; Upper limit+40 ℃, lower limit -40 ℃.
3. Relative temperature: daily average not exceeding 95%, monthly average not exceeding 90%.
4. Wind speed: not exceeding 700Pa (equivalent to a wind speed of 34m/s).
5. Ice thickness: 10mm.
6. Earthquake intensity: not exceeding 8 degrees.
7. Pollution level: Level IV.
8. Condensation may occur inside and outside the box during high humidity periods when there is a sudden drop.

·Main technical parameters of ZW26-12 series outdoor high-voltage vacuum circuit breaker:

Project	unit	ZW26-12/630-20	ZW26-12/1250-20
stable voltage	KV	twelve	twelve
rated current	A	six hundred and thirty	one thousand two hundred and fifty
rated frequency	HZ	fifty	fifty
Rated short-circuit breaking current	KA	16. 20	twenty
Rated short-circuit breaking current breaking times	time	thirty	thirty
Rated short-circuit closing current (peak)	KA	40, 50	fifty
Rated peak withstand current	KA	40, 50	fifty
Rated short-time withstand current	KA	16. 20	twenty
Rated short-circuit duration	S	four	four
Power frequency withstand voltage for 1 minute	KV	forty-two	forty-two
Lightning impulse withstand voltage (peak value)	KV	seventy-five	seventy-five
Total breaking time	S	<0.125	<0.126
mechanical life	time	ten thousand	ten thousand
Rated operating sequence		Min-0.3s HeFen-180s HeFen	Min-0.3s-181s-18s-1 on-off
Secondary circuit withstand voltage for 1 minute	KV	two	two
Top operating voltage and auxiliary circuit	V	AC/DC 220V, 110V, 48V, 24V	AC/DC 220V, 110V, 48V, 25V
Overcurrent tripping current	A	five	five
Six DC resistors per phase	μΩ	≤200	≤200

·ZW26-12 series outdoor high-voltage vacuum circuit breaker external installation dimensions: