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Electric Components Prescribed Condition
Aug 01, 2017

Can meet the electrical requirements of cabinet equipment; Electric Components because the components listed on the brand name of the electrical parameters refers to: a single electrical components according to the instructions used in the normal installation of the installation of the ambient air temperature limit does not exceed +40 ℃ lower limit of not less than - Electrical parameters in the 5 ° C environment. Electric Components (If the components are installed in a closed cabinet, the ambient air temperature will be higher than +40 ℃, or the two electrical components are installed together, etc.) are required to be installed according to the electrical components of the instructions Derating treatment, derating the electrical parameters after treatment is not necessarily able to meet the requirements.

With large-scale electrical components instead of small size electrical components, Electric Components electrical components should be different types of treatment:

A) For appliances that do not have protective functions such as isolating switches, contactors, etc., to meet the requirements of large generation.

B) For electrical components with automatic protection function, Electric Components the adjustment of the action settings can be adjusted, such as circuit breakers with electronic over-current releases, thermal relays, etc. When the action setting value can be adjusted to meet the protection function, Electric Components Small is able to meet the requirements.

C) For electrical components with automatic protection function, the adjustment of the action setting value can not be adjusted, such as molded case circuit breakers with overload thermal release, can not meet the overload protection requirements. For example: cm1-63, in = 40a Molded Case Circuit Breaker Overload protection characteristics: overload current of 1.3in = 1.3 × 40a = 52a in 1h must be action, Electric Components if the use of cm1-63a, in = 63a instead of when the overload current 52a When never action, can not play a protective role.

1) the rated current of the circuit breaker (depending on the load rated current);

2) the protection characteristics of the circuit breaker (depending on the nature of the object to be protected, such as power distribution or control motor), Electric Components if the circuit is connected with electrical appliances such as refrigerators, washing machines, air conditioners, Such as the choice of dz47-63 c10 circuit breaker may trip, Electric Components because it is c class release, does not apply to the power circuit.

3) The rated short-circuit breaking capacity of the circuit-breaker (including the rated limit short-circuit breaking capacity and the rated operating breaking capacity) shall be consistent with the rated short-time withstand current of the low-voltage unit.

Installation of circuit breakers:

1) If the operating instructions do not indicate that the circuit breaker allows reverse line installation,Electric Components but the operator will connect it into a reverse line, may cause the circuit breaker short circuit breaking capacity, can not meet the design circuit electrical parameters.

2) When the circuit breaker is installed, the arc spray distance can not be guaranteed, or the leakage nozzle orifice may cause a short circuit between the arcs of each phase,Electric Components to trip the upper circuit breaker, or to the adjacent components Or zero, components on the components or zero, parts burned.

3) Two molded case circuit breakers should be installed together according to the installation instructions of the circuit breaker to take the derating measures,Electric Components if not take measures may make the circuit breaker temperature rise is too high, may also affect the thermal overload release protection characteristics The If necessary, Electric Components add an arc plate between the adjacent arcs of the two circuit breakers to prevent the arcs from being ejected onto adjacent circuit breakers when a circuit breaker is short-circuited.

4) from the brittle material made of electrical components to install the bottom plate, in the installation of cushioning material to be made of cardboard or rubber band, Electric Components the installation plane can not be absolutely flat, if not buffer zero, parts in the electrical components installed Stress may be generated in the soleplate to cause breakage of the brittle backplane.

5) When the electrical components are installed, Electric Components the screws (including the unconnected screws) are locked because the vibration caused by the equipment during transport or operation may cause the screw assembly to come off and cause a short circuit.





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