1. Product Overview

Article 6.2.1 of GB 51348-2019 "Civil Building Electrical Design Standard (Description of Provisions)" stipulates as follows: Emergency Power Supply (Emergency Power Supply), referred to as EPS, is a power supply equipment composed of power converter, energy storage device (battery) and transfer switch (electronic or mechanical). When the AC input power is normal, the AC input power is directly output through the transfer switch.

The AC input power simultaneously charges the battery pack through the converter. In case of interruption (such as power interruption, voltage does not meet the power supply requirements), EPS uses the energy storage discharge of the battery pack to pass through the inverter transformation, and automatically switches to the emergency state to supply power to the load through the transfer switch.

2. Technical Requirements

1. Standard for Electrical Design of Civil Buildings GB 551348-2019

2. General Code for Electrical and Intelligent Building (GB 55024-2022)

3. product naming

4. product use

Emergency power supply EPS can be widely used in:

Application construction projects include hospitals, stadiums, rail subways, high-speed tunnels, hotels, government offices, airport stations, coal chemical and other engineering project systems, with a wide range of applications and strong load adaptability.

Application of new projects in the construction of emergency lighting, evacuation instructions, fire elevators, fire pumps, smoke exhaust fans, fire shutter doors, high-pressure sodium lamps, gas discharge lamps, operating tables, sewage pumps, gasification condensate pumps, chemical vacuum pumps and other important load equipment.

5. Standby Power Supply and Emergency Power Supply

Terms	Load class	I# commercial power	II# Mains	III# Independent special line mains	Self-contained power supply settings		Application conditions
					Emergency power supply	Standby power supply
Paragraph 1	Special Grade	Meet dual power requirements		Not available	Diesel generator	—	Large load capacity and long power supply time
	Special Grade	Meet dual power requirements		Not available	UPS/EPS	—	Large super load capacity, short power supply time, short switching time requirements
	Special Grade	Meet dual power requirements		Not available	Diesel generator UPS/EPS	—	Large load capacity, long power supply time, short switching time requirements
Paragraph 2	Level 1	available	Dual power requirements not available or not met	—	—	Diesel generator	Large primary load capacity and long power supply time
	Level 1	available	Dual power requirements not available or not met	—	—	UPS/EPS	The primary load capacity is small, the power supply time is short, or the switching time is required to be short.
	Level 1	available	Dual power requirements not available or not met	—	—	Diesel generator UPS/EPS	When the switching time between commercial power and diesel generator does not meet the requirements, add UPS/EPS power supply. The capacity of UPS/EPS shall meet the requirements of Class I load capacity, and the power supply time shall not be less than the switching time between commercial power and diesel generator.
Paragraph 3	Level 1	Meet the requirements of dual power supply but the switching time of two power supplies does not meet the requirements (such as two power supplies cold standby)		—	—	Diesel generator or UPS/EPS or a combination of both	The self-contained power supply shall meet the requirements of primary load capacity, power supply time and switching time.

6. emergency power supply EPS and diesel generator set comparison table

Indicators	Emergency power supply (EPS)	Standby generator set
Starting time	Quick start switching <0.25s, with load 100%.	Start for about 60 seconds, and gradually load after no-load start.
Environmental protection	No exhaust, no smoke, no noise, no vibration, no pollution.	Environmental assessment and acceptance shall be carried out, and environmental protection measures shall be added for pollution hazards such as exhaust, smoke exhaust, vibration and noise.
Fire Prevention	No burning, no fire hazard, no fire prevention measures.	Combustible oil, fire hazard, mandatory fire alarm measures
Maintenance	Unattended, automatic start and stop, a small amount of maintenance.	Special personnel are required to take care of it regularly, with monthly start-up, regular maintenance and increased costs.
Power supply condition	Supply voltage, frequency stability, good waveform, no surge.	The voltage and frequency are very unstable, the power supply quality is poor, and the electrical appliances are damaged.
Overload protection	Strong overload capacity and perfect protection function.	Weak overload capacity and poor protection function.
Reliability	The service life of power electronic components is more than 20 years, and the reliability is high.	The life of the mechanical device is about 10 years, and it cannot be started when it is critical, and the reliability is poor.
Cost of construction	One-time investment, through the sale of peak to fill the valley to save electricity, 5 to 7 years to recover the investment.	It consists of a primary investment and a secondary investment, consisting of purchase costs, auxiliary installation costs, fire fighting facilities, fuel and oil costs, labor maintenance costs, etc.
intelligent management	RS232/RS485 interface, can be remote monitoring, online monitoring of the working status, to create saving power management for users.	No cost management, increased costs.
Floor Area	8-12 square meters, the use of small area and low cost.	20-30 square meters, the use of large area and high cost.

How 7. Products Work

When the commercial power supply is normal, the EPS power supply is supplied to the important load by the commercial power supply through the output switching device, and the EPS power supply is charged or floated by the charger at the same time. When the commercial power is cut off or the voltage exceeds the power supply range, the controller starts the inverter, and the output switching device immediately switches the commercial power supply state to the inverter power supply to provide emergency power supply for the load equipment. When the commercial power is restored, the emergency power supply will be restored.

8. technical parameters

Main Technical Parameters of Products

Model		LY S-100~1500KVA
Charger	Input mains	AC380V（±15%）、50Hz±3%
	Charging voltage	DC400V-DC1000V
	Charging current	3-20A
	Charging mode	Automatic conversion of even charge and floating charge
Battery	Rated voltage	DC400V-DC1000V
	Standby time	≥ 90min, 30, 60, 90, 120min can be selected according to requirements
	Charging time	＜ 24h
Emergency Inverter	Emergency voltage	AC220/380V（±15%）、50Hz±3%
	Output waveform	Sine wave (THD ≤ 5%)
	Overload capacity	≤ 120% normal operation
	Protection function	Overcharge, charging circuit short circuit, over discharge, overvoltage, undervoltage and other protection
	Emergency switching	Mechanical switching ≤ 0.25s, static electronic switching ≤ 3ms
	Noise	Emergency ≤ 60dB

9. model specifications

Rated power （KVA）	Outline and size of main cabinet Width * Depth * Height (mm)	Battery cabinet dimensions Width * Depth * Height (mm)	Emergency time (Standard)	Single cabinet weight (including battery) Kg
2-40	600*800*2200	600*800*2200	90min	1200
50-75	600*800*2200	600*800*2200*2	90min	1200
80-100	600*800*2200	600*800*2200*3	90min	1200
110-200	800*800*2200	600*800*2200*4	90min	1200
220-300	800*800*2200	600*800*2200*6	90min	1200
310-400	1000*1000*2200	600*1000*2200*8	90min	1200
410-500	1000*1000*2200	600*1000*2200*10	90min	1200
600-750	1000*1000*2200	600*1000*2200*12	90min	1200
800-1000	1000*1000*2200	600*1000*2200*15	90min	1200
1200-1500	1000*1000*2200	600*1000*2200*20	90min	1200

Note: According to the emergency time (0.5 hours, 1 hour, 1.5 hours, 2 hours, 3 hours) configuration, select the same size of the battery cabinet and quantity, form the power pack screen system.

10. technical characteristics

1. Reasonable equipment layout, good seismic resistance and sealing performance, high reliability and stability;

2. The equipment adopts imported IPM intelligent power module assembly, with good reliability and high safety;

3. The equipment can realize fire-fighting linkage control according to user requirements, and can set up a main and a standby dual power input power supply system to switch automatically;

4. The equipment adopts plug-in design process, which is flexible in assembly and convenient in debugging and installation;

5. The panel adopts backlit LED liquid crystal display, with multi-channel analog quantity, switch quantity monitoring and protection function, real-time display of running status;

XI. Selection Scheme

1. Lighting EPS power supply unit:

Its rated output power shall not be less than 1.3 times the total capacity of the connected emergency lighting load.

2. Power equipment EPS power supply unit:

1) When the EPS power supply device has multiple motors and all of them are started, the EPS capacity = 1.05 × (the sum of the motor power directly started × the sum of the motor power started by 5 stars and triangle × 3 the motor power value started by variable frequency × 1.1)

2) When the EPS power supply device has multiple motors and they are not started at the same time, the EPS capacity = 1.05 × (the sum of the power of each motor, the power of the single motor with the largest direct starting capacity, X7 stars, the power of the single motor with the largest triangular starting capacity, the power of the single motor with the largest variable frequency starting capacity, the power of the motor with the largest variable frequency starting capacity, x 1.1)

The above motor work must also meet the following conditions:

a) The maximum single motor power for direct start is less than 1/7 of the EPS usable capacity;

B) The maximum power of a single motor for star-delta starting is less than 1/3 of the usable capacity of EPS;

c) The maximum single motor power for variable frequency start is less than 9/10 of the EPS usable capacity;

d) Adjust the capacity of EPS according to the maximum number in the above conditions to meet the working conditions of the motor. At the same time, the starting sequence of the motor shall be the first to start directly, followed by the star-delta starting, and finally the variable frequency starting.

XII. Product Pictures

1. Emergency power supply of pipe gallery industry

　　

　　

 

2. Emergency power supply in chemical industry

 

3. Emergency power supply for rail transit industry

　　

 

4. Emergency power supply for expressway industry