System Performance with Advanced Microprocessor Controls

4.4Load Control Features

4.4.1Short Cycle Control

The control system monitors the compressor and prevents it from turning on within 3 minutes of being turned off. If this (on, off, on) occurs too often, 10 times in one hour, a Short Cycle alarm could occur.

4.4.2Sequential Load Activation Control

The control allows only one load output to be energized at a time on a restoration of power or micro- controller reset. Each additional load output will be activated at one second intervals until desired operating conditions have been met.

4.5Additional Features

4.5.1Connecting the Analog Sensors

The sensor inputs are factory set to accept a 4 - 20 mA signal. However, the inputs can be changed by removing the appropriate jumpers on the control circuit board. See Table 14, Figure 5 and Figure 6.

The user supplied analog sensors MUST have their own power supply. To reduce the effects of inter- ference from any noise source, the sensor input wiring should be shielded twisted pair and the shield tied to earth ground at one end.

Analog input terminals for field connections are factory wired to the microprocessor board if specified when ordered. Eight terminals are located in the field wiring compartment of the unit. Wire sensors to the terminals as follows:

Table 14 Analog input terminals

Terminal

Signal

 

 

41

Input #1 (+)

 

 

42

Input #1 (–)

 

 

43

Input #2 (+)

 

 

44

Input #2 (–)

 

 

45

Input #3 (+)

 

 

46

Input #3 (–)

 

 

47

Input #4 (+)

 

 

48

Input #4 (–)

 

 

Consult your Liebert supplier for a field installation kit to add these connections after unit delivery, if required.

Table 15 Additional connections available after unit delivery

 

Input #1

Input #2

Input #3

Input #4

 

 

 

 

 

4–20 mA

Jumper P50.1 & 2

Jumper P50.5 & 6

Jumper P50.9 &10

Jumper P50.13 &14

 

and P50.3 & 4

and P50.7 & 8

and P50.11 & 12

and P50.15 & 16

0–5 VDC

Jumper P50.1 & 2

Jumper P50.5 & 6

Jumper P50.9 & 10

Jumper P50.13 & 14

 

 

 

 

 

0–10 VDC

NO Jumper

NO Jumper

NO Jumper

NO Jumper

 

on P50.1 & 2

on P50.5 & 6

on P50.9 &10

on P50.13 & 14

 

and P50.3 & 4

and P50.7 & 8

and P50.11 & 12

and P50.15 & 16

34

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Liebert 3000 manual Load Control Features, Additional Features, Short Cycle Control, Sequential Load Activation Control
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

One of the standout features of the Liebert 3000 is its high-efficiency design. With an efficiency rating of up to 94%, the system minimizes energy loss, resulting in lower operational costs and a reduced carbon footprint. This is particularly important in today's environmentally conscious climate, as organizations strive to meet sustainability goals while maintaining top-tier performance.

The Liebert 3000 employs advanced technologies to enhance its functionality. It incorporates online double-conversion technology, which provides a continuous supply of clean and regulated power. This technology ensures that connected loads receive stable voltage and frequency, shielding them from voltage spikes, sags, and outages. Additionally, the UPS offers features such as automatic battery testing, which helps ensure peak battery performance and reliability.

Another key characteristic of the Liebert 3000 is its modular design, allowing for flexible scalability. This means that organizations can easily expand the capacity of their UPS system as their power needs grow, without the need for extensive system overhauls. The modular architecture also facilitates simplified maintenance and reduces downtime, as individual modules can be serviced without interrupting power to the critical load.

The system is equipped with comprehensive monitoring and management capabilities. The Liebert 3000 provides real-time data on power usage, battery status, and system performance, enabling facility managers to make informed decisions and proactively address potential issues. The integration of remote management tools allows for seamless monitoring from anywhere, providing peace of mind for operators.

Overall, the Liebert 3000 combines high efficiency, advanced technology, and flexible design to deliver a robust power protection solution. Its reliability and performance make it a preferred choice for organizations seeking to protect their critical infrastructure while enhancing operational efficiency and sustainability. As businesses continue to rely on technology for their everyday operations, the Liebert 3000 stands out as a dependable safeguard against the uncertainties of power quality.
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