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Explains UPS operation during normal AC mains supply.
Explains UPS operation when AC mains power fails.
Explains sensor's role in detecting battery temperature for charging voltage adjustment.
Details how to attach the sensor probe to the battery casing.
Describes testing the sensor's response to heat sources.
Ensure MCBs and maintenance switch are off before proceeding with installation.
Connect battery wires to BATT+/BATT-, confirming correct polarity.
Arrange cables and place batteries in compartment; installation is complete.
The DAIREN Uninterruptible Power Supply (UPS), specifically the EBOPS Vision Model SSW 24-4ND, is designed to provide continuous power to a load, ensuring operation even during mains power failures. This UPS system integrates a rectifier, a set of batteries, and an inverter to achieve its primary function.
In its normal operational state, referred to as "Standby Mode," the UPS acts as a bridge between the AC mains supply and the connected load. During this mode, the rectifier component of the UPS is responsible for charging the internal batteries. Simultaneously, the system ensures a steady supply of power from the mains to the load. This setup allows the batteries to remain fully charged and ready for immediate use, while the load receives power directly or through a regulated path from the AC mains.
When an AC mains failure occurs, the UPS seamlessly transitions into "Emergency Mode." In this critical phase, the system's internal batteries take over as the primary power source. The stored DC energy within the batteries is converted into AC current by the inverter, which then supplies power to the connected load. This transition is designed to be instantaneous, preventing any interruption to the load's operation. Once the AC mains supply is restored, the UPS automatically reverts to Standby Mode. An electrical change-over contact facilitates this switch, allowing the mains to once again supply the loads directly, and the rectifier immediately begins recharging the batteries to ensure they are prepared for any subsequent power outages.
The UPS is equipped with a battery temperature sensor, which plays a crucial role in optimizing battery charging and extending battery lifespan. This sensor continuously monitors the temperature of the battery casing in real-time. If the battery temperature exceeds a predefined maximum threshold during float charging, the UPS intelligently adjusts its charging voltage. Specifically, the charging voltage is reduced to compensate for the increased temperature, preventing overcharging and potential damage to the batteries caused by excessive heat. This feature ensures that the batteries are charged under optimal conditions, contributing to their longevity and reliability.
The UPS features a clear and intuitive LED panel display that provides essential operational information. This panel typically shows the voltage and current readings, allowing users to monitor the system's status at a glance. A "Timer Switch" button is integrated into the control panel, which, when pressed, configures the LED panel to display voltage and current for a duration of 4 hours. This feature can be useful for specific monitoring periods or diagnostic purposes.
For electrical connections, the UPS provides a terminal block with clearly labeled connections for AC supplies, load, and battery. The "220V_L" and "220V_N" terminals are for the mains line and neutral wires, respectively, with a recommended cable size of >1.5 sq.mm. An "E" terminal is provided for the Earth wire, requiring a larger cable size of >2.5 sq.mm for safety. The load connections are designated "LS/LT" for the loads line wire and "NS/NT" for the loads neutral wire, both requiring >1.5 sq.mm cables. Battery connections are marked "BAT+" and "BAT-" for positive and negative terminals, respectively, with a recommended cable size of >4.0 sq.mm, indicating the higher current draw associated with battery power. Additionally, terminals "P1/P2" and "N1/N2" are provided for DC loads positive and negative, respectively, requiring >1.5 sq.mm cables.
The device also includes various control port terminals for advanced integration and monitoring. "Volt+" and "Volt-" terminals connect to the TMS02 card, likely for voltage sensing. "AMP+" and "AMP-" terminals are also present, presumably for current sensing. "P75+" and "P75-" terminals are dedicated to connecting to an elevator control system, indicating the UPS's suitability for critical applications like elevator power backup. "T_P" and "T_S" terminals are designated as NC (Normally Closed) for auxiliary power, providing status signals. A +5V output indicates successful emergency operation, while 0V signifies an emergency operating failure, offering clear status feedback for external systems.
The UPS incorporates an Input MCB (Miniature Circuit Breaker) on the left side of the door panel, which serves as the main switch for the 230VAC input to the UPS. An Output MCB is located on the right side of the door panel, controlling the 230VAC output to the load. These MCBs provide essential overcurrent protection and allow for manual disconnection of power.
A crucial maintenance feature is the battery switch, also referred to as the maintenance switch. This switch is designed to isolate the AC supply from the rectifier and, more importantly, to cut off the DC supply to the inverter. This isolation capability is vital during maintenance procedures, particularly when replacing batteries. It is explicitly recommended to turn off this battery switch, along with all other UPS circuit breakers, before commencing any battery replacement or other maintenance tasks to ensure the safety of personnel and prevent damage to the equipment.
The installation of the battery temperature sensor is straightforward, requiring the metal probe to be taped onto the side of the battery casing. This simple installation method ensures accurate temperature readings for effective charging compensation. To test the sensor's functionality, users can bring the metal probe close to a heat source. An increase in the sensor's temperature should result in a reduction of the float charging voltage, confirming that the temperature compensation mechanism is working correctly.
For initial startup with AC present, a specific sequence of steps is outlined to ensure proper system initialization. First, the AC supply at the AC distribution panel must be switched on. Next, the Battery Switch on the UPS itself needs to be switched on. Upon doing so, the DC Voltmeter on the panel will display the battery terminal voltage, the "MAINS ON" LED indicator will light up, and the DC Ammeter will reflect the battery charge current. Finally, the "OUTPUT ON / OFF" MCB on the panel should be switched to the "ON" position. To ensure the UPS operates according to specifications, it is critical that the batteries are charged for a minimum of 24 hours after initial setup or after a significant discharge.
The manual also describes a procedure for simulating a mains failure, which is valuable for testing the UPS's emergency response. This simulation involves switching off the input MCB. When this occurs, the inverter Red LED indicator will light up, while the mains Green LED indicator will turn off, clearly signaling the transition to battery power. Concurrently, the DC Ammeter will show the battery output discharge current. For extended testing of the UPS under emergency conditions, it is advisable to switch off the AC supply to the UPS. Once testing is complete, switching on the AC supply to the UPS will resume its normal operation.
The UPS is designed to operate within a specific environmental range to ensure optimal performance and longevity. Its operating temperature range is specified from -10°C to 60°C, and it can function in ambient humidity levels of 20% to 90% (non-condensing). For storage, the device can withstand temperatures from -25°C to 55°C. These environmental specifications highlight the robust design of the UPS, allowing it to be deployed in various industrial and commercial settings.
Battery installation and wiring procedures are detailed to ensure correct setup. Before connecting batteries, both the INPUT MCB and OUTPUT MCB on the UPS door panel, as well as the MAINTENANCE SWITCH on the PCB card, must be in the "off" position. The positive and negative wires of the battery are connected to the "BATT+" and "BATT-" terminals on the PCB card, respectively. Battery cables should be connected one by one, carefully confirming the positive and negative polarity of each battery. After wiring, the battery cables should be neatly arranged, and the batteries pushed into the cabinet battery compartment. A critical note emphasizes that before turning on the OUTPUT MCB, it is essential to ensure that the AC load is not short-circuited or overloaded (exceeding 120W) to prevent damage to the system.
General| Topology | Line Interactive |
|---|---|
| Operating Temperature | 0-40 °C |
| Frequency | 50 or 60 Hz |
| Battery Recharge Time | 4-6 hours to 90% capacity |
| Communication Interface | USB |
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