A) Separation of electricity units of a building
This mode is mostly used in projects where it is not possible to receive branch electricity from the relevant electricity department, for example, commercial buildings that have a large number of consumers or projects that use electricity generation systems such as CHP or CCHP. The cabling structure is much simpler and less expensive if a smart electricity meter is used, so that electricity can be delivered from the entrance of the building to the distribution boards installed on the floors through a central cable or bus duct. And by using the separation electricity meter at the entrance of the units, he implemented the operation of separation of electricity.
Among the merits of implementing this system, the following can be mentioned
- No need to buy electricity distribution and reduce the initial cost
- No need to allocate space for installing entrance meters (especially in commercial buildings), which will significantly save the cost of the desired space.
- No need to allocate space for installing entrance meters (especially in commercial buildings), which will significantly save the cost of the desired space.
- The possibility of using a bus duct system with a much higher quality than the usual methods
b) Power separation of chillers, water supply booster pumps, engine room, etc.
One of the applications of the energy meter system is the separation of the common electricity consumption of the building between the units based on the exact amount of consumption, for example, the electricity consumption of the compression chiller or the electricity consumption of the engine room, since in most cases the electricity meter of the common areas (elevator, lighting, etc.) is connected with the facilities section (engine room). , chiller, etc.) is common, for this reason, the amount of the common share of the facilities should be separated at first, and then the share of the facilities should be divided among the consumers based on the consumption of each unit. For this reason, it is necessary to use intelligent electricity separation meters for different parts of facilities such as compression chillers, engine room or booster water supply pumps.
The way of dividing common electricity between units can be defined as follows:
- Distribution of common electricity consumption (elevator, lighting, etc.) between units based on unit size, number of people, equal, etc.
- Distribution of chiller electricity consumption between units based on fan coil consumption (using energy meters)
- Dividing the electricity consumption of the engine room between the units based on the cooling and heating energy consumption of fan coils and sanitary hot water (using energy and sanitary hot water meters)
- Dividing the electricity consumption of booster water supply pumps between the units based on the water consumption of each unit (using sanitary hot and cold water meters)
Technical specifications of single phase meter
Rail single-phase meter without disconnect relay
Measurable items
- Total energy consumption Kwh
- Input energy consumption Kwh and output (return) energy consumption Kwh
- Voltage V – Current AC – Frequency Hz
- On-Off relay
- Modbus communication network (RTU)
Technical specifications of the three-phase meter
STANDARD CURRENT | RATED VOLTAGE | CLASS | type |
---|---|---|---|
3×1.5(6)A | 3×100V | Class 1.0 or Class 2.0 | Three Phase Three Wire |
3×1.5(6)A |
3×380V | ||
3×1.5(6)A |
3×57.7/100V | Three Phase Four Wire | |
3×1.5(6)A |
3×220/380V | ||
3×2.5(10)A |
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3×5(20)A |
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3×10(60)A |
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3×20(80)A |
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