Terminal Box Knockout Tester/Junction Box Orifice Cover Strike off Testing Machine/testing Equipment for pv Module

Terminal Box Knockout testerJunction box Orifice cover strike off testing machinetesting equipment  for pv module

Standard

According to IEC 61730:2-2004 and EN 168

purpose

Removable hole covers in the walls of module terminal enclosures (knockouts)shall remain in place under nominal force application and also be easily removed for the field appliction of permanent wiring system components 

specifications

1. 38mm length,diameter 6.4mm flat-heat circular shaft 
2.Connection box clamp
3.Weights automatic lift and fall device 

Specimen conditional :
With a knock-off orifice’s polymer connection box sample will in the temperature 25ºC being test .

With another knock-off orifice’s polymer connection box sample will in the -20±1ºC Placed 5h

After placed , the connection box should repeat above testing immediately

Test procedure as following :
First , use the shortest Length 38mm,Diameter 6.4mm flat-head circular shaft against 

knock-off cover apply 44.5N force,continue apply force 1min

Apply force direction with orifice cove plane vertical , its add maybe cause knock-off orifice cover 

move place , after 1 h , measurement orifice cover with connection box wall dislocation

Second , use a screw knife as chisel , Open the knock-off cover , knockoff after allow the screw 

knife blade edge along already opened inner wall scratch a circle. In order to clear the edge’s debris 

Third , For another two knock-off cover repeat the first step and second step 

If connection box’s knock-off cover can have more diameter trepan , when small diameter knock

off cover is opened , big diameter knock-off cove should not move , qualified determination 

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