The contact box is formed by epoxy resin with APG technology, it is used for insulation, isolation & connection transition in various kinds of handcart switchgear.
Working conditions
1.Altitude: ≤1000m
2.Ambient temperature at -30℃ to +40℃, the daily average temperature should not more than 30℃
3.The daily average of relative humidity is less than 95%, the average monthly is less than 90%.
4.Working environment should be without steam, gas, chemical corrosive deposition, salt fog, dust, dirt and other dangerous explosive media, which will severely impact on insulation and conductivity of products.
5.Working environment should not be regular vibration or serious bumps
Drawing
1.The coper contact to earth shall withstand power frequency test voltage(effective value )of 42kv for 5 minutes and lightning impulse vpltage (peak value)of 75KV
2.The temperature of lead-out terminal shall not bemore than 65℃ if the contact box is used for long time in rated current condition