High efficiency, low energy consumption, advanced performance, durability and reliability, made of green materials should be used for electrical equipment.
Distribution transformers should be selected D, yn11 junction group of transformers, it is appropriate to choose amorphous alloy core type low loss transformer.
Three-phase distribution transformer should meet the current national standard "three-phase distribution transformer energy efficiency limit value and energy efficiency class" GB 20052 energy saving evaluation value requirements. Dry-type transformers should be self-contained ventilation and cooling facilities.
Pumps, fans and other equipment and other electrical devices should meet the relevant current national standards for energy efficiency rating. Selection of small and medium-sized three-phase asynchronous motor in the rated output power and 75% of the rated output power efficiency should not be lower than the current national standards, "small and medium-sized three-phase asynchronous motor energy efficiency limit and energy efficiency class" GB 18613 energy-saving evaluation value.
The suction power of the AC contactor should not be higher than the current national standard "AC contactor energy efficiency limit value and energy efficiency class" GB 21518 energy-saving evaluation value.
Reasonable selection of motor starting mode, in order to avoid a large voltage impact on the power grid. When using soft start or frequency conversion starting mode, it should manage the harmonics generated by itself, and the amount of harmonics injected into the power grid shall not exceed the permissible value stipulated by the national standard.
When possible, the power of 200kW or more motor should be selected high-voltage motor.
When the system short-circuit capacity or transformer capacity is small, high-power motors should be used constant frequency voltage soft start, or other control measures to reduce the starting current, improve the starting characteristics.
In the low-voltage distribution system, it is appropriate to choose the green energy-saving combination of electrical appliances, reduce the size of the box (cabinet), reduce the complicated wiring, not only to save materials and improve the safety and reliability of the system.
Emergency lighting power supply (EPS) and uninterruptible power supply (UPS) battery, should be used closed maintenance-free battery to avoid liquid leakage of environmental pollution.
When the use of diesel generators as an emergency power supply, should choose a small size, low noise, fast start, energy saving and environmental protection, as well as ancillary equipment supporting a complete unit.
It is appropriate to analyze the passenger flow according to the functionality of the building, service floors and service objects, and reasonably select the elevator and escalator models, operating speed, number of units and control management programs. It is appropriate to adopt energy-saving technology for elevators, and for high-speed elevators, it is appropriate to adopt "energy-regenerative" elevators.
A single elevator should have energy-saving control measures such as set selection control, idle stop operation, automatic control of lights and fans. When 2 or more elevators are centrally arranged, they should have group control function which is centrally regulated according to the specified procedures.
Escalators and moving walks shall have energy-saving drag and energy-saving control devices, and shall be suspended or run at low speed when all sections of the whole line are empty, and shall be set up to automatically control the start and stop sensing devices of escalators and moving walks.
Long-term continuous work of water pumps, fans, should take frequency control measures.
The air-conditioning cold (heat) source system should take energy-saving control measures, including the control of the chiller according to the cold (heat) load and frequency conversion control of the circulating water pump.
Electric water boilers and other electric heating equipment, it is appropriate to set up timing control devices.
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