ZW10-12、ZW12-12、ZW27-12 outdoor HV Vacuum Circuit Breaker are three-phase ac outdoor hv switching devices,the breaker is mainly used for distribution systems in country or city network,mines,railway and ports with 12kv level,rated current 630a,rated frequency 50hz,especially for outdoor overhead line ,it switches on/off load current and over load or short current to switch and protect electic networks ,maching with a disconnecting switch,the preaker can be a combined switch,the disconnecting switch is installed on the side of the breaker body,combining with the breaker by the angle iron underframe.on the transmission shaft,the interlocking device is installed for matching with breaker’s mechanism,so it can prevent from incorrect manipulation
matching with a reclosing controller or segmentation controller,the breaker becomes a recloser(or sectionalizer)interlligerce breaker,matching with a reclosing controller and PT ,the breaker has three segment compound protection of switch on rush current control,over current protection and short quick break,and it has 1~3times of reclosing ,low current ground protection,wired supervisory control functions ,it can slso remote control under the pole ,and comtinuously regulate parametersof the breaker ,it os an ideal choice for spot switch and simple measurement switch outside country network wubstations .
Nomal working environment1、ambient temperature:+40℃~-40℃；
2、altitude:≤2000M，it should be custom-made for >2000M
3、wind pressure: ≤ 700PA(equivalent to wind speed 34m/s)
4、relative humidity:day value ≤95%,month value≤90%
5、pollution class: Ⅳ
6、surrounding air id not poluted by corrosive gas or inflammable gas seriously;
7、no frequent excessive vibration.
ITEM UNIT PARAMETER rated voltage KV 12 rated current A 630/1250 power frequency withstand voltage KV 42/48 lightning impulse withstand voltage(peak value) KV 75/85 rated short circult breaking current KA 12.5 16 20 / 20 25 31.5 rated short current switching current (peak value) KA 31.5 40 50 / 50 63 80 rated short time withstand current KA 12.5 16 20 / 20 25 31.5 rated peak value withstand current KA 31.5 40 50 / 50 63 80 breaking current frequency under rated shout circlt TIMES 30 mechanism life TIMES 10000
Dimension and mounting
- [book id=’27’ /]
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