ABB DSTA 001A 3BSE015195R1 Connection Unit

Class I, Division 2 covers hazardous locations where flammable gases, vapors or volatile liquids are handled either in a closed system, or confined within suitable enclosures, or where hazardous concentrations are normally prevented by positive mechanical ventilation. Areas adjacent to Division 1 locations, into which gases might occasionally flow, would also belong to Division 2 (NEC (500-5[b])). Hazardous Location Any area where there is the possibility of explosion and fire resulting from the presence of flammable vapors, liquids or gas, or combustible dust or fibers

Summary of NEC Article 505 

The NEC also classifies hazardous locations for flammable gases and vapors into zones under NEC 505. This system is more in line with the European Standards, CENELEC and IEC, with the major difference being that NEC 505 only classifies gases and vapors while CENELEC and IEC also include dusts.

• Lower continuous carrying amperages are not suitable for motor control applications (typically 3A to 5A rated) 

• Contacts cannot be forced open 

• Permanent magnet attracts metallic dust and filings that can reduce the electrical creepage distance between live terminals

Explosion Proof Enclosures

Enclosures capable of withstanding an internal explosion while preventing external ignition. Enclosures designed for Class I, Div. 1 can safely be used in Class I, Div. 2 

• Higher level of protection than required for Class I Division 2 

• Higher material and installation costs 

• Conduit sealing is still required 

• Time consuming maintenance

Company product range

----------------------Ruichang Mingsheng Automation Equipment Co., Ltd----------------------

PLC module, programmable controller, CPU module, IO module, DO module, AI module, DI module

Network communication module,

Ethernet module, motion control module, analog input module, analog output module, digital input module, digital output

Module, redundancy module, power module, relay output module, relay input module, processor module

after-sales

Professional sales electric brand products around the world

Products overseas direct purchase, quality goods inventory, price concessions

After-sales warranty, models complete, the same product, different price and service.