Fracture insulation is divided into two categories. First, refers to the circuit breaker fracture. Internationally. This means that it only refers to the level of insulation that the circuit breaker arc extinguishing unit should have in order to meet the arc extinguishing requirements. When the fracture insulation only means that only the breaking effect, does not include the "safety distance" guarantee. That is to say, although the breaker's opening is in the opening position. However, staff members are not allowed to do their homework (climb to the EQUIPMENT for homework, etc.), which can not afford "isolation". Compared to the corresponding voltage level of the isolating switch. Its insulation level is low. The other category is called "off-day isolation from the insulation level." Jane you "isolated fracture", this fracture insulation isolation switch by the insulation requirements. When the circuit breaker has such a level, it acts as a disconnector (but must be a "visible fracture" and does not have a fracture threshold or fracture capacitance). Therefore, the voltage level of the insulation level of circuit breakers were made on this respectively. Generally speaking. It is difficult to distinguish between operating conditions: what does not require isolation, and when isolation is required, but the circuit breaker used for both systems must be "isolated". The advent of a product, the use of the situation is different. To a fixed structure of the product to meet a variety of different requirements, would rather fracture insulation will be set as "isolated fracture" level. However, it is uneconomical to do so when the voltage exceeds a certain level because of the excessive size increase sometimes.
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