should consider the particularity of the generator when converting the power supply between the city power and the generator. it is confirmed that the generator will start automatically after the city power is cut off. it can be output only when the index of the generator power supply reaches a stable value and has an interconnection device. select and use ats according to conversion time. selection and use of

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p from     1. according to the relevant national and industry specifications, the faster the conversion time is, the better. however, considering the current technical conditions of power supply in china, it is stipulated that the conversion time is within 30 seconds. when fire fighting equipment is in operation, sudden power failure will inevitably lead to power conversion. because the long time of conversion will stop fire fighting equipment and affect its use, it is necessary to add secondary control links to ensure that fire fighting equipment continues to work. therefore, when selecting ats, priority should be given to products with fast conversion time.

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p from     2. for emergency lighting, according to the current design time practice in china, the power supply of urban power grid is generally used as emergency lighting power supply. in order to meet the needs of use and for safety, it is allowed to use urban power grid for power supply. however, when using ats as emergency lighting, the power conversion time should be satisfied after the normal power supply is cut off: evacuation lighting < 15s (shorten the conversion time when conditions permit), standby lighting < 15s (financial commodity trading place < 1.5s), and safe lighting < 0.5s.

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    3. when the generator unit is used as emergency lighting power supply, the total time of start-up and conversion of the generator should not exceed 15s. selection and use of quadrupole ats.

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   according to the regulation of iec 465.1.5, the switch between normal power supply and standby generator shall be quadrupole switch. from     to   double power supply switch with leakage protection should adopt quadrupole switch. when two power switches have leakage protection, the lower power switch should adopt quadrupole switch

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p from     the power switch between two different grounding systems should adopt quadrupole switch. _tn-s and tn-c-s systems generally do not require quadrupole switches. according to the above requirements, when selecting ats,

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should determine whether to use quadrupole ats

or not according to the specific functions and requirements.