Products:

• Suspended mining locomotive
  -DLZ110F
• Mining railway locomotive
  -DLP140F (DLP140F13t)
  -DLP50F
  -P70 E
  -P70
• Ground rail locomotive
  -PLP50F
• Roadheading machine
  -PSU9000
• Coal crushers
  -DUF1
  -DUF2
• Mining diesel manipulators
  -ŠA-MAN-D.1E
  -DMZ50F
• Electro-hydraulic manipulator
  -ŠA-MAN-01
• Hydraulic transport vehicle
  -TZH8/16
  -NZH2/4
• Arched mine support trimmer
  -SK1
• Mine support bender
  -ODP 5
• Flameproof alternator
  -NAF28V/15A
  -NAF28V/7A
• Universal flameproof lamp
  -NSU14/28
  -NSU-D 12/24
• Non-explosive key controller
  -NTO24V, NTO24V-2
• Hydraulic distributor
  -NEV24V...
• Set of cabins for personal transport
  -type SK
  -type DZK20F
• Braking carriages for heavy suspension lines
  -BTs
• Suspension line
  -MPD24F
• Beam trolleys
  -NV5
• Diesel and electric rack rail system
  -EHT180

 

Flameproof alternator NAF28V/15A

NAF28V/15A flameproof alternator, hereafter referred to as NAF, are designed to be operated as a source of electric current for Diesel-powered monorail and surface locomotives, and/or other mine machinery.

The flameproof NAF alternator may be used in environments involving hazards of methane and coal dust explosion. According to the Government Statute No. NV 23/2003 (Direction of European Parliament and Counsel of European Union EU 94/9/ES) is equipment ranked with group I, category M2 and meets all requirements NV 176/2008 (Direction of European Parliament and Counsel of European Union EU 2006/42/ES) and must be switched off once an explosive atmosphere emerges.

The NAF alternator is an electric device, an alternator enclosed in a flameproof rigid enclosure, powered by an external drive, such as a combustion engine, via a belt gear. The NAF alternator consists of a modified multi-pole generator with self-excitation and a flameproof housing with a busbar space. There, inside in the houses of alternator are installed a diode block, a voltage controller and 4 bushings issuing to the busbar space. The electrical connection between the busbar space of alternator and external devices is made through flameproof bushing (one or two, according to the modification).

The body of the alternator has brackets welded onto it to be fixed to the machine. The alternator band wheel fitted with a cooling propeller may be designed for either one or two drive belts.          

Technical data
Nominal current	10A
Nominal voltage	28V
Nominal output	140 W
Prevention from incidental touches	low SELV voltage
Weight	15 kg
Drive speed	1100 - 3650 min-1
Dust and water protection	IP54
Type of flameproofing	ex I M2, Exd I

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This project is financed by European Fund for Regional Development and Department of Trade and Industry of Czech Republic.