Applicable operation environment and installation condition
The elevation is below 2000 m
◆The temperature of the ambient media is not higher than +40℃(+45℃ for the ship product) and is not lower than -5℃(elevation is 2000M and lower)
◆Can resist the influence from the humid air
◆Can resist the influence from the salt smog and oil smog
◆Can resist the influence from the mildew.
◆Can resist the influence from the nuclear radiation
◆Maximum lean is 22.5
◆Can reliably operate under the normal shock from the ship
◆Can reliably operate under the earthquake (4g)
◆If the media is free from the explosion danger and does not include the air to erode the metal and destroy the insulation and conductive dust.
◆The site is free from the rain and snow invasion.

Note:
◆No code is fro the distribution breaker; the protective electromotor breaker is indicated by “2”
◆No code is for direct operation of the handle; P is for the electromotor operation, “Z” is for the rotating handle
◆The product is divided into two poles (100 type and 225 type), three pole and four pole (DNM1-1250 has no four poles)
  The neutral pole type of the four-pole products is divided into four types: 
 A type: N pole is not installed by the over-current release part and N switch on all the time, and does not close and open with other three poles.
  B type: N pole is not installed by the over-current release part, and N pole will close and open with other three poles (N pole will first close, and then open)
  C type: N pole is installed by the over current release part, and N pole will close and open with other three poles (N pole will first close, and then open)
  D type: N pole is installed by the over-current release part, and N pole switches on all the time and does not close and open with other three poles.
◆Divided by the rated current (A) as 9 levels such as DNMl-63 (6),10,16,20,25,32,40,50,63A (6A specification has no over-load protection  )；
  DNMl100 is 10 levels such as (10),16,20,25,32,40,50,63,80 and 100A;
  DNMl-225 is seven levels such as 100,125,140,160,180,200 and 225A;
  DNMl-400 is five levels such as 225,250,315,350 and 400A；
  DNMl-630 is three levels such as 400,500 and 630A
  DNMl-800 is three levels such as 630,700 and 800A
DNMl-1250 is three levels such as 800,1000 and 1250A [the level with ( ) is not recommended]]；
◆It is divided into front board connection, rear board connection and plug connection by the connection mode.
◆It is divided into the heat-driven ---electromagnetic (compound) type and electromagnetic (instant) type by the current release type.
◆The breaker is divided into the break with the accessory and the breaker without accessory.
◆The accessory is divided into internal set and outside set
◆The internal set is divided into the excitation release, under-voltage release, assisted contact and alarm contact.
◆The external set is divided into the rotating handle operation mechanism, electromotor operation mechanism, interlocking machine and connection terminal of the assisted set.