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 Electric trace heater
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 The document of electric  heating
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 The meaning of defending  rate symbol
 explosion  protectionequipment
 Accessories
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  The Common Sense of Explosion Protection Equipment  
       
Principle for explosion protection
       
Type Principle for explosion Diagrammatize Applying examples
Separated
explosion
“d”
It is a kind of electrical apparatus, or Explosion protection
which can bear the ignite mixture breaker,switch,light,
blasting inside of the shell, and keep button,operating pole,
good. Also it cannot ignite the xplosive match electric case,
gas atmosphere formed by one or more gas electric-machine
steam through any plane or structure hole  
Increased
safety
“e”
Electrical apparatus can improve the And
EPjunctionbox,
safety for some electrical equipment, connector,pullline
which under the normal working condition box,transition case,
cannot produce electricity arc, sparkle. flexibility tube,light,
  can avoid the somewhere dangerous,   electric-achine
  electricity arc; sparkle inside or utside    
  of the equipment.    
Obverse
press
“p”
It is a kind of electrical apparatus that
EP analyzing room,
in order to be safety, which is keeping large electromotor,
the press of the inside rotective gas match electric, meter
higher than the around explosive gas controller
atmosphere.  
Essence
safety
“i”
Electrical light and heat domino offect
EP communication
caused by equipment inside circuit under equipment,sensor,
the normal working or the decided roubles adjuster, surveying
of the testing all impossible to ignite and controlling
equipment of  the explosive gas or steam. equipment
Watering
envelop
“m”
Watering the electricity arc,sparkleorhigh Explosion protection
temperature parts that maybe ignite the transformer, resistor
explosive compound  
     
Explosion protection examples
3.1 Explosion protection symbol ExdⅡ BT6,Explosion protection electric equipmentⅡB
Separating explosion T6
3.2 Explosion protection symbol ExeⅡ T3,Explosion protection electric equipment Ⅱ Increase
safety T3
3.3 Explosion protection symbol ExeⅡ CT4,Explosion protection electric equipment using ⅡC
double explosion protection type, that is using main Increase safety, and inside installing
separating explosion and Ex element
3.4 Explosion protection symbol ExdeⅡ BT5,Explosion protection electric equipment using
double explosion protection type, that is using main separating explosion, connecting is
Increase safety.
3.5 Explosion protection symbol ExpⅡ T4,Explosion protection electric equipmentⅡ Obverse
press T4 。
 
Cable outer Dia corresponding to cable import-setting
nominal diameter The scope of outer Dia for retrench cable
mm Inch mm
15 ¢5-¢9
20 ¢8-¢12
25 1 ¢10-¢18
32 ¢12.5-¢20
40 ¢16-¢24.5
50 2 ¢18-¢36
70(65) ¢24-¢51
80 3 ¢44-¢63
100 4 ¢60-¢85
125 5  
150 6  
     
Note :1寸=8分,3/4寸=6分,1/2寸=4分
     
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