ABB 216MB66 HESG324510M1 equipment rack.In order to supply the electronic units with power the protection must be connected to an external auxiliary d.c. supply (station battery). The auxiliary d.c. supply unit 216NG61, 216NG62 or 216NG63 (DC/DC converters) steps the station battery voltage down to 24 V and provides electrical insulation between input and output voltages. The 24 V supply is distributed to the units inserted in the protection equipment rack via the B448C parallel bus. The 216NG61, 216NG62 or 216NG63 power supply unit also supplies the electronic circuits on the I/O units. A 216MB66 equipment rack can be equipped with just one or with two redundant 216NG61, 216NG62 or 216NG63 auxiliary d.c. supply units. Redundant units can be connected to the same or to two different station batteries.
To learn more about this product click on the file below or download the file:
REG216, REG216 Compact REC216 Digital Generator Protection Digital Control Unit.pdf
Equipment rack 216MB66/216MB68 and parallel bus B448C The main features of the parallel bus B448C are:
• Specification based on IEEE P 896 (future bus)
• Time multiplexing of addresses and data(16 bit)
• Asynchronous data transmission with handshake
• Integrity checking of each data exchange.
• Up to 32 master units having equal status, actively accessing the bus
• Common internal 24 V auxiliary supply for all electronic units; redundant 24 V are possible.
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