Power supply units
In the course of the modernization and automation of coal mining operations the number of electrical consumers used has been increasing. These consumers, however, require a sufficient supply of electric power.
For this purpose, Tiefenbach Control Systems offers the power supply units of the dNTA series. These are characterized by an extremely rugged design and their flameproof enclosure system. Furthermore, they can be operated with different voltages at the primary side which facilitates integrating them into an existing system.
The power supply units are available for input voltages from 24 VAC to 230 VAC at an output voltage of 12 VDC / 0.6 A, 1.0 A or 1.5 A.
![[Translate to Englisch:] dNTA 42](/fileadmin/products/bergbau/dNTA_03.jpg "[Translate to Englisch:] dNTA 42")
dNTA 42
The dual power supply unit includes two modules which each generate the 12 VDC output power. Both modules come integrated with all components required for converting the primary voltage into intrinsically safe output voltage. Thus, the[...]
The dual power supply unit includes two modules which each generate the 12 VDC output power. Both modules come integrated with all components required for converting the primary voltage into intrinsically safe output voltage. Thus, the modules operate totally independent of each other which helps to essentially increase their functional reliability. The voltage output is short circuit proof. The modules are installed in a flameproof housing. The heat resulting from the power loss is dissipated thermically via the module housings and the flameproof enclosure.
Two explosion-proof cable entry glands are available for the mains power connection with one cable gland designed as lead-through to further power supply units.
In order to permit a fast diagnosis if a fault occurs the power supply unit can be equipped with a test switch. The switch can be used to cut off the mains power to the downstream power supply units after an earth leakage occurred.
The intrinsically safe circuits are led out via plug-type connectors. Further connection to the individual consumers is effected using the SKK-24 hoseline which has a proven track record in mining.
dNTA 81
The power supply unit includes a module in which the 12VDC output power is generated. This module comes integrated with all components required for converting the primary voltage into intrinsically safe output voltage. The voltage output is[...]
The power supply unit includes a module in which the 12VDC output power is generated. This module comes integrated with all components required for converting the primary voltage into intrinsically safe output voltage. The voltage output is short circuit proof. The heat resulting from the power loss is dissipated thermically via the module housing and the flameproof enclosure.
In order to permit a fast diagnosis if a fault occurs the power supply unit can be equipped with a test switch. This switch can be used to shut off the downstream power supply units after an earth leakage fault.
The intrinsically safe circuit is led out via a plug-in socket which has an explosion-proof screw connection to the power supply enclosure. Further connection to the individual consumers is effected using the SKK-24 hoseline which has a proven track record in mining.