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CNBackup power monitoring: Ensuring your power supply is continuous and reliable.
What is UPS?
A UPS (Uninterruptible Power Supply) is an emergency power supply device that integrates power conversion, energy storage, and control. It's a complete power supply protection system that integrates a
rectifier, inverter, battery, static switch, and control circuit.
Its core functions are twofold: First, when the mains power is normal, it filters out voltage fluctuations, surges, harmonics, and other grid interference, outputting a stable and clean power supply.
Second, when the mains power is interrupted, it seamlessly switches power supply through battery energy storage (online UPS switching time <10ms), ensuring that the load equipment does not fail and
data is not lost.
Main Application Scenarios:
1. Power Industry: Substation control circuits, circuit breaker operating power supply;
2. Industry: Power supply for protection devices in factory power distribution rooms;
3. Buildings: Power distribution control power supply for high-rise buildings.
Q: Most DC power supplies are equipped with a Battery Management System (BMS), so why is an external monitoring device still needed?
Modern UPS systems, especially mid-to-high-end online UPS systems, have a fairly complete built-in Battery Management System (BMS) that can monitor key parameters such as voltage, internal resistance,
and temperature.
However, in actual critical infrastructure (such as data centers, communication equipment rooms, and hospitals), external independent battery monitoring equipment is still standard equipment, and even
a mandatory requirement.
The reason is that the two have completely different positioning, depth, reliability, and management dimensions; they are complementary rather than substitutive.
Which parts of a DC system need monitoring?
1. System insulation status (specific to DC power supply units)
Regular monitoring involves monitoring the insulation status of the positive and negative terminals to ground. However, some DC power supply units require AC inrush monitoring, which our products currently
do not support.
Purpose: To prevent short circuits from damaging equipment, to prevent circuit breaker tripping, to prevent protection malfunctions, and to prevent protection failures.
2. Battery bank health status and ambient temperature (battery room) (lead-acid battery monitoring)
3. Bus voltage and current (DC meters)
Voltage monitoring: To prevent battery overcharging and over-discharging.
Current monitoring: To identify sudden load changes and internal faults (circuit breaker closing causes inrush current, short circuit).
Acrel Products:
1. Battery monitoring
https://www.acrelglobal.com/Dc-energy-meter/djsf1352-rn-din-rail-dc-energy-meter506
