AC power monitoring system

The AC01 AC power monitoring system is a multifunctional monitoring system developed to meet the increasing power monitoring needs of various data centers. It monitors the full power parameters of A+B incoming lines and up to 144 outgoing lines. When a limit exceeding event occurs, the system alarm is immediately triggered.

The AC01 AC power monitoring system consists of a main controller, a 7-inch 16.7M color industrial touch screen, and multiple AC collectors. The dynamic loop system communicates with the main controller using RS-485, and the main controller communicates with the human-computer interaction screen using RS232. The main controller communicates with the AC collector using RS-485, with a maximum of 100 nodes. Each communication collector is reserved with RS-485 communication, which can be connected to the device for communication as needed. The communication collector has full power parameter collection and supports three-phase/single-phase applications.

The system modules are shown below and can be configured as needed.

1、 Functional characteristics‍

a) Fully modular design, with built-in redundant power supply systems that are completely independent of the main and backup circuits, allowing any energized system to operate;

b) Industrial grade 32-bit ARM processor with advanced technology, high reliability, and strong computing and processing capabilities;

c) A 7-inch, 65K color industrial grade color touch screen with a powerful all Chinese interface and user-friendly human-computer interaction;

d) The system is equipped with a built-in Chinese input method, which can input and define the name of each output load on site, and can also be remotely modified by connecting to the upstream RS485 of the dynamic environment monitoring, effectively improving maintenance convenience;

e) Input monitoring parameters: phase voltage, line voltage, phase current, neutral current, zero to ground voltage, current to load ratio, active power, reactive power, apparent power, power factor, active energy, frequency, voltage imbalance, current imbalance, etc;

f) Output monitoring parameters: voltage, current, current to load ratio, power factor, active power, active energy, etc;

g) The incoming line monitoring can be set to single/dual incoming lines, with the functions of voltage, current, power demand and maximum value statistical analysis;

h) Complete sound and light alarm function: The main control module integrates an alarm buzzer inside, supporting the output of cabinet top running lights and alarm lights;

i) Alarm for voltage exceeding limit, phase loss, frequency exceeding limit, neutral current exceeding limit, zero to ground voltage exceeding limit, temperature exceeding limit, voltage imbalance exceeding limit, current imbalance exceeding limit, and two-level current exceeding limit. The alarm threshold for each output branch can be set separately;

j) Query and list the current alarm events, and manually clear switch events generated by testing;

k) Query and list 5000 historical alarm events, with permanent power-off saving function;

l) RS485 interface for high-level ESD protection, standard Modbus RTU protocol, unified access to the dynamic environment platform for centralized monitoring;

2、 Technical indicators‍

1. Usage conditions‍

Working power supply: 85-265VAC, power consumption less than 15W, built-in redundant power supply system with completely independent main and backup circuits;

Working environment: Under normal use, the ambient air temperature around the equipment should not be lower than -10 º C and not higher than+45 º C;

Under storage conditions, the ambient air temperature shall not be lower than -25 º C and not higher than+55 º C;

Relative humidity: The average humidity at 45 ℃ shall not exceed 50%, and the maximum humidity at room temperature shall not exceed 90%;

Mean time between failures (MTBF):>50000 hours;

2. Measurement range‍

Incoming voltage: The rated phase voltage is 220VAC (10%~120%), and the measurement accuracy is better than 0.5% (0.5S);

Input current: 0-100mA or 0-5A, with an external transformer to expand the range and a measurement accuracy of better than 0.5% (0.5S);

Output current: 0-100mA, expanded range through external transformer, measurement accuracy better than 0.5% (0.5S);

Active power of incoming/outgoing lines: measurement accuracy better than 0.5% (0.5S);

Input/output reactive power: measurement accuracy better than 1% (1S);

Active energy of incoming/outgoing lines: measurement accuracy better than 0.5% (0.5S);

3. Switch status input‍

Main incoming switch: Use auxiliary contacts (OF, SD, OF+SD) or determine the status through the voltage of the lower port of the incoming switch;

Incoming lightning arrester: Use auxiliary contacts, normally open contacts, and the number of lightning arrester groups can be set in the system menu;

Lightning arrester switch: using auxiliary contacts, the system automatically recognizes whether monitoring is needed;

Outgoing switch:

1) Using SD48 switch acquisition module, supporting wet or dry contacts, with internal photoelectric isolation;

2) Using the AC24 communication acquisition module, determine the current switch status by measuring the voltage at the lower end of each switch;

4. Communication interface‍

RS232: Connected to touch screen, with a fixed baud rate of 115200bps;

Downlink 485 (with acquisition module): RS485, with a fixed baud rate of 115200bps;

Uplink 485 (Link Monitoring): RS485, supports baud rates of 9600bps (default), 19200bps, 38400bps

115200bps, communication protocol using Modbus;