Vertiv Liebert AF4 User manual

Vertiv™ Liebert® AF4
User Manual

Vertiv™ Liebert® AF4 User Manual
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If you encounter any installation or operational issues with your product, check the pertinent
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The information contained in this document is subject to change
without notice and may not be suitable for all applications. While
every precaution has been taken to ensure the accuracy and
completeness of this document, Vertiv assumes no responsibility
and disclaims all liability for damages resulting from use of this
information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods,
tools, and materials to be used in performing procedures not
specifically described in this document.
The products covered by this instruction manual are manufactured
and/or sold by Vertiv. This document is the property of Vertiv and
contains confidential and proprietary information owned by Vertiv.
Any copying, use, or disclosure of it without the written permission of
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Vertiv™ Liebert® AF4 User Manual

TABLE OF CONTENTS
1 General Instructions 1
2 Handling Instructions 3
3 Recommended Environmental Conditions 5
4 Electrical Installation Requirements 7
5 Maintenance Requirements 9
6 HMI Operating Instructions 11
6.1 Home 12
6.2 Oscilloscope 18
6.3 Harmonics 21
6.4 Phasor 24
6.5 Meter 26
6.6 Settings 28
6.7 Harmonics Selection (Harm. Sel) 34
6.8 History 35
7 Technical Specifications 37
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1 General Instructions
• Instructions and precautionary measures listed in this manual should be strictly used for the
safety of the product as well as the operators.
• All the ratings and/or variants of Vertiv™ Liebert® AF4, (Active Filter) in their open-door
condition on any side, have exposed live parts (holding/operating high voltage) such as
components, PCBs, terminals, and cables.
• The energy storage elements used in the Liebert® AF4 hold the high DC voltage even after
switching/disconnecting all the power connections.
• Only the trained and authorized electrical personnel are allowed to handle and/or install and/or
repair the Liebert® AF4.
• Improper handling and/or use and/or maintenance of the Liebert® AF4 will be hazardous to
humans as well as the product. Such instances should be strictly avoided.
1 General Instructions 1
Vertiv™ Liebert® AF4 User Manual

1 General Instructions
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2 Handling Instructions
• Equipment while in packed condition should be kept in the upright position as per the arrow
indication mark on the packing.
• Store the equipment in dry location having temperature range between -10 °C to 70 °C.
• Once received at the site on a dedicated transport vehicle, use the fork lift and/or cranes to
move the equipment as close as possible to the installation site.
• Ensure proper unpacking by the experienced personnel at site as per standard practices.
• The unpacked equipment should be physically inspected for any signs of apparent damage
either during the transportation and/or handling. In case of any such signs, do not install the
equipment, and inform the Vertiv service team accordingly.
• Each Liebert® AF4 unit is equipped with 4 eye bolts on top. Once unpacked, an appropriate eye
hook with sufficient loading capacity should be utilized to position the Liebert® AF4 at the sit.

2 Handling Instructions 3
Vertiv™ Liebert® AF4 User Manual

Figure 2.1 Eye bolt

Figure 2.2 Lifting hook

Figure 2.3 Lifting Liebert® AF4 using lifting-hook (Top View)
2 Handling Instructions
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Vertiv™ Liebert® AF4 User Manual

3 Recommended Environmental Conditions
• Equipment should be installed in a room free from water in any form such as vapor, steam,
droplets, seepage, spills, etc.
• The location should be free from vibrations and/or shocks.
• Vertiv™ Liebert® AF4 should be installed in a shaded room to avoid exposure to direct sunlight.
• The place should be well-ventilated ensuring the room temperatures (considering 3% thermal
losses from Liebert® AF4), stay below the specified product ambient temperature (< 50 °C). The
ventilation system should ensure that no direct dust deposits form in the room.
• The foundation should be able to handle the weight of the Liebert® AF4 with provisions to
facilitate bottom cable entry into the unit.
• The minimum clearance on all sides of the Liebert® AF4 should be provided to ensure proper
ventilation and maintenance space. Minimum requirements are 1000 mm at the front, 300 mm
on all three sides, and 400 mm on top.
• Approximate product weight and heat losses in the Liebert AF4 range are given in the table
below:
Rating (A)
3-Wire 4-Wire
Weight (kg) Heat Loss (W) Weight (kg) Heat Loss (W)
30 85 550 95 733
60 120 1022 132 1363
100 138 1430 190 1907
150 210 2148 244 2864
200 240 2834  
300 410 4296  
400 460 5668  
Table 3.1 Product weight and heat losses in the Vertiv™ Liebert® AF4

NOTE: The space in which the Vertiv™ Liebert® AF4 is installed should be designed to dissipate the
additional thermal losses specified in the table.
NOTE: The platform on which the Vertiv™ Liebert® AF4 is installed should be able to support twice
the original weight of the Vertiv™ Liebert® AF4 mentioned in the table.
3 Recommended Environmental Conditions 5
Vertiv™ Liebert® AF4 User Manual

3 Recommended Environmental Conditions
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4 Electrical Installation Requirements
• A provision for electrical isolation and protection for the Vertiv™ Liebert® AF4 should be kept
upstream to the Vertiv™ Liebert® AF4 connection, for the use during emergency and
maintenance periods.
• Ensure the minimum possible cable lengths between the Liebert® AF4 and its point of
connection. In typical applications, cable lengths are to be below 30 m. In case of deviations,
please contact our product application engineer.
• Recommended to use flexible copper cables for the power terminations to Liebert® AF4.
The recommended cable sizes are as follows:
Size Flexible Copper Cable C.T Cables (Sq. mm) C.T Earthing Cable
(2-Level) Size in Sq.mm 6-Core Cu. VA Loading 1-Core Cu.
30 10 2.5 15 2.5
60 25 2.5 15 4
100 50 2.5 15 6
150 70 2.5 15 6
200 120 2.5 15 10
300 240 2.5 15 10
400 2 Runs of 185 2.5 15 10
Table 4.1 Recommended sizes flexible copper cables

• Neutral cable is only needed for 3-Phase 4-Wire Liebert® AF4s, which is of the same rating as
phases.
• A 2.5 Sq. mm, 6-Core Copper Cable should be used to connect the CTs and CT terminals inside
the Liebert AF4.
• Three-phase power terminals for 3-Phase 3-Wire Liebert® AF4, Three-phase and neutral power
terminals for 3-Phase 4-Wire Liebert® AF4, three-phase CT connections, and external control
supply connections (if necessary) are located inside the enclosure on the front side. Earth
connection provision has been made at the base frame.
• Insert a current transformer (CT) on each phase of the load or main supply terminals, where the
harmonic correction should be done. P1 of all CTs should be towards the incoming side, while P2
is towards the load side.
• The same phase sequence (either RYB or RBY) should be followed while terminating three-
phase power cables and CT secondary cables.
• A proper earthing connection should be made using the cable/strip of appropriate grade and
size, as per applicable standards.
4 Electrical Installation Requirements 7
Vertiv™ Liebert® AF4 User Manual

• All the connections and terminations should be made by a qualified electrical technician.
Standard Vertiv™ Liebert® AF4 power connections will be as shown in the Figure 4.1 below:
Figure 4.1 Power connections
Denotation Description
1 CT Terminals
2 6-Core CT Cable Entry
3 Power Cable Entry (3-Core)
B Power Terminals
Y Power Terminals
R Power Terminals
4 Electrical Installation Requirements
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Vertiv™ Liebert® AF4 User Manual

5 Maintenance Requirements
• All the power and control supplies are to be kept in OFF condition, prior to any kind of service or
maintenance activities.
• Even during the OFF condition, one should strictly avoid any physical contact with the internal
components/parts, to avoid the electrical shock due to charged capacitor banks inside.
• Liebert® AF4s have air filters located on the air filter pockets of the back and side doors, which
should be periodically cleaned using forced air flow and/or suction by an authorized and skilled
technician.
• In case of any service calls and/or maintenance requirements, one should contact the email
and/or contact details printed on the product nameplate.
5 Maintenance Requirements 9
Vertiv™ Liebert® AF4 User Manual

5 Maintenance Requirements
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6 HMI Operating Instructions
The Vertiv™ Liebert® AF4 is equipped with high-performance 7-inch capacitive touch TFT display-based
Human Machine Interface (HMI). The same HMI is meant for product configuration, visualization of product
and plant parameters, and waveforms. The Default HMI screen appears as below:
Different functions of HMI are accessible through the following eight tabs:
1. Home
2. Oscilloscope
3. Harmonics
4. Phasor
5. Meter
6. Settings
7. Harmonic Selection (Displayed in short form as “Harm. Sel”)
8. History
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Vertiv™ Liebert® AF4 User Manual

The following section provides the detailed description on functionality of each tab:
6.1  Home

The Home tab is designed to display the real-time performance of the Vertiv™ Liebert® AF4 in terms of
the following parameters:
a) Current harmonics mitigation
b) Basic power parameters of the electrical system
c) Critical Vertiv™ Liebert® AF4 operating parameters
d) Control to Enable/Disable auto restart of the Liebert® AF4.
6 HMI Operating Instructions
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Vertiv™ Liebert® AF4 User Manual

The user can visualize the following parameters in real-time on the Home tab:
• Supply frequency
• True RMS values of three-line (R, Y and B) voltages (V-LL) and their respective THDs.
6 HMI Operating Instructions 13
Vertiv™ Liebert® AF4 User Manual

• Three-Phase Active (P), Reactive (Q), and Apparent (S) Powers along with Displacement
Power Factors (DPF):
Power Parameters changes roll one after other.
6 HMI Operating Instructions
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Vertiv™ Liebert® AF4 User Manual

• True RMS values of three-phase (R, Y, B, and N) load currents and their respective THDs:
• True RMS values of three-phase (R, Y, B, and N) source currents and their respective THDs:
6 HMI Operating Instructions 15
Vertiv™ Liebert® AF4 User Manual

• True RMS values of three-phase (R, Y, B, and N) currents:
• Internal DC bus voltage, and heat sink temperatures:
6 HMI Operating Instructions
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Vertiv™ Liebert® AF4 User Manual