Application of centralized power supply emergency lighting power system
At 5kW, the input voltage is three-phase 380V%, and the output voltage is 220V*%10% (single-phase three-way). The input voltage of other EPS is single phase 220V±25%. The output voltage is working properly. Less than 55dB. Style, floor type. When there is utility power, the utility power is output through the KM, and the charger charges the maintenance-free battery. Emergency lighting is an important measure to ensure the safety of people and property in buildings when the controller detects the electrical design of the mains power outage or owing to civilian buildings. Article C.3.1 of the Appendix to the Electrical Design Code for Civil Buildings (JGJ/T16-92) stipulates that after normal power failure, the power conversion time of the emergency lighting should meet: evacuation lighting 15s. (2) standby lighting 15s, financial transaction The 1.5s. emergency lighting power supply mainly includes: a feeder line from the power grid that is effectively separated from the normal power source. The product type EPS is suitable for emergency power supply devices that provide centralized power supply for evacuation lighting, safety lighting, and accident lighting in the event of a building fire or other emergency. Product features are easy to maintain and manage, and can be left unattended. The supply voltage is stable, ensuring stable illumination. Low overall cost (20% 30% compared with built-in battery type lamps), no smoke, no noise, no vibration, no pollution (compared with oil machine). It can be linked with fire protection. When the microcomputer voltage is implemented, the inverter works to switch the KM to the emergency output state to continuously supply power to the load. 5 Application wiring diagram (1) is a single-phase input single-phase output single-loop wiring diagram. Normally, the circuit breaker QF is closed (the same below) to control the working state of the lamp. QT is the automatic transfer switch. When the M is powered, the QT is connected to 1, the normal power supply, the M is de-energized or a fire occurs (specification: fire When the power of the relevant layer is cut off, QT is connected to 2, and the emergency power supply EPS is supplied. When the load is short-circuited and overloaded, QF is disconnected. Since there is still electricity in M, QT is no longer connected. 2. When the load leakage is grounded, QF does not disconnect but there should be a signal. (2) Single-phase input single-phase output multi-circuit wiring diagram. Normally, the circuit breakers QF and QF2 are closed, and QF2 controls the working state of each circuit lamp. When there is electricity at M, QT is connected to 1, and the power is supplied normally; when power loss occurs in M ​​or fire occurs, QT is connected to 2, and emergency power supply EPS is supplied. When the load is short-circuited and overloaded, QF2 is disconnected. Since there is still electricity in M, when the load leakage is grounded, QF2 does not open but there should be an alarm signal. (3) Three-phase input three-phase output, single-phase three-way output wiring diagram. Three-phase input three-phase output, single-phase multi-output wiring diagram. However, the power supply of the transfer switch QT in both figures should be quoted from the front of the circuit breaker QF. (4) Single-phase input single-phase output for multi-layer wiring diagram. Centralized power supply for multi-layer or multiple load power, QF and QF2 can control the normal working state of the lamp. KM is an automatic conversion AC Contactor , which is located in the layer Distribution Box ; when the KM is powered, its contact is connected to 1, KM loses power or fire occurs, its contact is connected 2. The automatic transfer switch QT loses power at M When connected to 2, powered by EPS. (5) Single-phase input single-phase output field control wiring diagram: When the utility power is normal, the circuit breaker QF is normally closed, the automatic transfer switch QT is connected to 1, the normal power supply, by the field double control (or delay) switch S1 and S2 Control the lighting of the luminaire. When the mains loses power or a fire occurs, the automatic transfer switch QT is connected to 2, EPS is supplied, and the on-site switches S1 and S2 are out of control, and the emergency lights are often. Only the two parts of the dotted frame XZ cannot be connected in the same power supply loop. Otherwise, the control of the luminaires by the field switches S1 and S2 will interfere with each other. However, it has two major advantages: First, the emergency light can be kept on without the need to cut off the mains in the fire (the secondary control contacts are closed, and the L line has all electricity). Second, when the mains loses power and no fire occurs, the automatic transfer switch QT is connected to 2, EPS power supply, but the field switches S1 and S2 can still control the switch and close of the lamp, so the energy is more energy efficient.
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