DC & AC DISTRIBUTIONS
Example 1
Distribution 220 VDC, 3 level of selectivity
STRUCTURE:
– The first level of distribution selectivity, battery protection against overload, short circuit and deep discharge MCCB, 20 A to 630 A, 30 to 50 kA
– Second level of distribution selectivity, protection of loads from overload and short circuit MCCB, 20 A to 160 A, 30 to 50 kA MCB, 10 A to 60 A, 5 to 15 kA
– Third level of distribution selectivity, protection of loads from overload and short circuit MCB, 10 A to 60 A, 5 to 15 kA
– Fourth level of distribution selectivity, protection of loads from overload and short circuit MCB, 1 A to 25 A, 5 kA or fuses 1 A to 10 A, FF, F or T characteristic
General technical data
VOLTAGE:
AC voltage
– 230 V, 50 Hz
– 3 x 400 / 230 V, 50 Hz
One or more DC voltage
– 24 VDC,
– 48 VDC,
– 60 VDC,
– 110 VDC,
– 125 VDC,
– 220 VDC,
CURRENT
1 A to 630 A / 5 kA to 50 kA
Example 2
After that, medium-sized consumers will be excluded.
Distribution 3 x 400 / 230 V, 50 Hz
SELECTIVE SWITCHING OFF / ON OF LOADS
Due to the rational use of the rechargeable battery, when the battery is powered, less important appliances must be switched off first.
After that, medium-sized consumers will be excluded.
The most important consumables will be disconnected from the battery at the latest.
For example:
The least important consumer will be disconnected when the battery voltage drops below 1.9 to 2 V.
Medium consumables will disconnect from the battery when the battery voltage drops below 1.8 to 1.9 V.
The highest priority consumers will be disconnected from the battery when the battery voltage drops below 1.65 to 1.8 V.
In this way, the electricity of the battery is rationally used and prevents the process of deep discharge of the battery.
The power loads will be turned on again when the battery chargers are working.
Battery monitoring and the process of turn on / turn off the groups of circuit breakers ie the loads is performed by a central microprocessor unit.