1. Introduction

HVD7-40.5 outdoor HV AC vacuum circuit breaker has many visual advantages like reasonable design, fashionable appearance, high safety and reliability, simple maintenance, long electric life. It is the ideal upgraded products of 35KV outdoor oil circuit breakers.

HVD7-40.5 vacuum circuit breaker is applicable for three-phase power system of AC 50HZ.It is used to make and break the load current ,overload current and short-circuit current.

HVD7-40.5户外交流高压真空断路器(ZW7-40.5)，具有设计合理、外形新颖、安全可靠、维护简便、电寿命长等优点。是35KV户外多油断路器更新换代的理想产品。

    HVD7型真空断路器用于交流50Hz的三相电力系统中，作为分合负荷电流、过载电流及短路电流之用。

2. Applicable environment

2.1The ambient temperature should be -30℃~ +40℃(-40℃ in the frosty area);

2.2Altitude should not exceed 2000m(over 2000m is plateau type);

2.3The wind pressure should not exceed 700Pa(equal to wind speed 34m/s);

2.4Air pollution degree: Ⅲ,that of antifouling type:Ⅵ;

2.5The installation site should be free from the fire, explosion, chemical corrosion and serious vibration.

2．使用环境

2.1周围空气温度不高于+40℃，不低于-30℃（严寒地区-40℃）；

2.2海拔不超过2000米（2000米以上为高原型）;

2.3风压不超过700Pa(相当于风速34m/s);

2.4空气污秽程度III级，防污型Ⅳ级；

2.5无火灾、爆炸危险、化学腐蚀及剧烈振动的场所。

1. Main technical parameters

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