Liebert LDM User Manual

Liebert Distribution Monitoring (LDM)

User Manual

AC Power
For Business-Critical Continuity™

TABLE OF CONTENTS

SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.0 GLOSSARY OF ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2.0 PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.0 MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3.1 Branch Circuit Monitoring Control Board (BCB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 Panel Board Voltage-Current Board (PBVI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3 Large Interface Board (LIB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.4 Branch Circuit Monitoring Sensor Module (BSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.5 Power Supply Assembly (with EMI Filter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

4.1 Installing a BSM (CT Module Assembly) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.1.1 Connecting Panelboards A and B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2 Installing a Solid-Core Current Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.3 Connecting a Current Transformer to the PBVI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.4 CT Table for PBVI Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.5 Connecting a Current Transformer to the LIB Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.6 CT Table for LIB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

5.1 Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.2 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.1 LDM Setup Port Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2.2 Modbus Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.3 Downloading the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.4 Using the Monitor Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.4.1 Starting the Monitor Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.4.2 Monitor Menu Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.4.3 Panel Status and Real-Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.4.4 Main Breaker Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4.5 Breaker Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4.6 Mode Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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5.5 Using the Configuration Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.5.1 Starting the Configuration Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.5.2 Main Configuration Window Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.5.3 Load a Configuration File from Disk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5.4 Install Configuration Changes in the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5.5 Save the Configuration File to Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.5.6 Select Panel to View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.5.7 Select Breakers to View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.5.8 Edit the Liebert LDM Unit Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.5.9 Edit the Panel Properties or Set a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.5.10 Edit the Breaker Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.5.11 Add or Delete a Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.12 Adding a Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.5.13 Adding a Subfeed Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.5.14 Delete a Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.6 Upgrading the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.0 TROUBLESHOOTING / FAQS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

TABLES

Table 1 CT matrix for the Liebert LDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 2 Wiring configuration of large branch circuit breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 3 Wiring configuration for LIB 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 4 Wiring configuration for LIB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 5 Parameters monitored for breakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 6 Alarm conditions and factory setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 7 Monitor menu options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 8 Monitor mode buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 9 Overview of main Configuration window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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SAFETY INSTRUCTIONS

WARNING

!

As with all types of electrical equipment, dangerous voltages exist within the equipment
where the Liebert Distribution Monitor (LDM) is installed. For maximum safety, ensure
power is removed and circuit breakers/disconnects are tagged/locked out per all applicable
national, state and local electrical codes prior to working inside equipment.

The area around the equipment must be free of any debris or standing water.

All power and control wiring must be installed by a qualified electrician in accordance with
the NEC and all applicable national, state and local codes.

ONLY qualified service personnel should perform maintenance and/or service on the Liebert
LDM. When performing maintenance and/or service on any component, verify test equipment
is insulated and has been inspected prior to use.

To avoid damage to the circuit boards, personnel handling these components should be
wearing an Electrostatic Discharge strap or other approved protective device.

When replacing or installing a solid core Current Transformer (CT), power must be removed
from equipment to prevent damage to the CT and/or circuit board. If the CT is a split-core
design, follow proper electrical safety procedures.

These safety precautions are to be used in conjunction with NEC and local/state electrical
code.

1

1.0 GLOSSARY OF ABBREVIATIONS

The following abbreviations are used in this manual.

BCB Branch Circuit Monitoring Control Board

BCMS Branch Circuit Monitoring System

BMS Building Management System

BSM BCMS Sensor Module

DSP Digital Signal Processor

GUI Graphical User Interface

IGM Information Gathering Module

LDM Liebert Distribution Monitor

LIB Large Interface Board

OCWC OpenComms Web Card

PBVI Panelboard Voltage Current

PCD Power Conditioning Device

PDU Power Distribution Unit

STP Service Terminal Protocol

Glossary of Abbreviations

2

2.0 PRODUCT OVERVIEW

The Liebert Distribution Monitor (LDM) monitors the main panelboard circuit breaker and individual
panelboard branch circuit breakers. The measurements are used to report the current and alarm con­ditions for each breaker. The Liebert LDM utilizes branch circuit sensor modules and individual cur­rent transformers (CT) to monitor current. In addition, the Liebert LDM monitors options like
subfeed and output circuit breakers and provides a full array of power parameters and alarms.

The Liebert LDM is available as an option for the Liebert PPC™ Precision Power Center, Liebert
FDC™, Liebert FPC™ and Liebert RDC™ Remote Distribution Cabinet.

Product Overview

The Liebert LDM system can communicate with a Building Management System (BMS) and Liebert
SiteScan

®

Web.

The Liebert LDM consists of a control board, panelboard voltage and current board, power supply
boards and sensor modules and can monitor two 42-pole panelboards and three subfeed breakers.

The Liebert LDM is capable of receiving input from 21-pole current sensor modules; two sensor mod­ules are required to monitor one 42-pole panelboard. The sensor module (BSM) contains twenty-one
50A current transformers (CTs) capsulated in an epoxy-filled plastic enclosure designed to be
mounted next to the panelboard. Sensor modules are designed to work with Square D™ and GE pan­elboards. If a sensor module CT fails, connections are provided for up to six replacement CTs. The
optional CTs can be attached directly to the load cable feeding the failed CT.

For branch breakers larger than 50A, discrete 100A rated large branch current transformers can be
added. Higher-rated CTs can be used for monitoring optional subfeed circuit breakers. For subfeed
breakers, like main panelboard breakers, the Liebert LDM monitors not only the 3-phase current but
also the ground and neutral current. These subfeed circuit breakers are in addition to the 42 panel­board circuit breakers that can be monitored through the BSM. The Liebert LDM can accommodate
18 individual large current transformers.

If your Liebert power center is supplied with a Square D I-Line

®

panelboard, the Liebert LDM can
also monitor it as well as its output breakers. A large interface board (LIB) replaces the panelboard
voltage and current board and can monitor up to 42 poles. Each LIB can monitor eight 5-wire I-Line
and/or subfeed breakers including ground and neutral current. There can be 1 or 2 LIBs per control
board that can monitor a total of sixteen 5-wire I-Line and/or subfeed breakers.

The Liebert LDM has a Modbus port on the BCB for direct communication with a building manage­ment system (BMS). The Liebert LDM can communicate with Liebert SiteScan by using a Liebert
SiteLink™ communication device. A Liebert SiteLink-2E™ is available as an option with the Liebert
LDM and is mounted in the power center. Modbus Registry Summary documentation can be found at:

http://www.liebert.com/product_pages/ProductDocumentation.aspx?id=72

Click on the link for the Liebert Distribution Monitor (LDM Toolkit). Save the file to a desktop or lap­top computer (PC) and extract the contents.

3

3.0 MAJOR COMPONENTS

3.1 Branch Circuit Monitoring Control Board (BCB)

The BCB is the main processing and storage circuit board of the Liebert LDM. It is a DSP-based logic
controller with internal flash memory and non-volatile memory. The BCB also includes a battery­backed real time clock.

Major Components

One of the power parameters, kilowatt-hours (kWh)
board mains, subfeeds and each branch circuit breaker. A Modbus command is provided to reset all
accumulated power usage.

, data is accumulated on this board for the panel-

4

3.2 Panel Board Voltage-Current Board (PBVI)

The PBVI board monitors two panelboards and provides the voltage attenuators for the two panel­board voltages. The two sets of panelboard main breaker CTs are connected to the PBVI board.

Connections for the 18 large branch CTs are located on the PBVI board. The nine CTs on the A side of
the board are normally associated with the A-side voltages for power calculations. The B-side CTs are
normally associated with the B-side voltages. A cross-configuration tool allows changing that associa­tion for subfeeds.

Major Components

The 18 large branch CT inputs can also be used to monitor up to three subfeed circuit breakers. This
is configured using the Configuration tool (see 5.5 - Using the Configuration Tool). The CTs from
the B side of the PBVI are cross-configured to the A side so that the three sub-feeds appear within the
A-side panelboard register space. The 18 large branch breakers require CTs with 1A secondary.

WARNING

!

Before connecting a large CT to the PBVI board, note the CT MUST have 1A secondary.
Connecting a 5A secondary type CT will damage the board and the CT.

To ensure the proper current ratio and accuracy, the CTs should be purchased through
Emerson Network Power. See Table 1 for details. Contact your local Emerson Network
Power representative or call Liebert Services at 1-800-LIEBERT (1-800-543-2378).

Table 1 CT matrix for the Liebert LDM

Part Number Description Phase CT Ground CT Neutral CT

528415G1-L 3 pole 100A Subfeed Breaker 5W CT Kit 23" Frame 100:1 100:1 200:1

528415G2-L 3 pole 125-225A Subfeed Breaker 5W CT Kit 23" Frame 200:1 100:1 500:1

528415G3-L 3 pole 250-400A Subfeed Breaker 5W CT Kit 23" Frame 500:1 100:1 500:1

531461G6-L 3 pole 0-100A I-Line & Subfeed Breaker 5W CT Kit 47" Frame 200:1 100:1 200:1

531461G9-L 3 pole 125-225A I-Line & Subfeed Breaker 5W CT Kit 47" Frame 200:1 100:1 500:1

531461G12-L 3 pole 250-400A I-Line & Subfeed Breaker 5W CT Kit 47" Frame 500:1 100:1 500:1

531461G18-L 3 pole 0-225A I-Line Breaker 3W CT Kit 47" Frame 200:1 — —

531461G19-L 3 pole 250-400A I-Line Breaker 3W CT Kit 47" Frame 200:1 — —

528461G13-L 1 pole 0-100A Branch Breaker CT Kit 100:1 — —

528415G14-L 2 pole 0-100A Branch Breaker CT Kit 100:1 — —

528415G15-L 3 pole 0-100A Branch Breaker CT Kit 100:1 — —

5

3.3 Large Interface Board (LIB)

The LIB provides the voltage attenuators for Square D I-Line panelboard
voltages. The LIB monitors the current for the I-Line panelboard. The
panelboard input CTs are connected to the LIB board. There are 42 CT
inputs provided. The current inputs require the use of 1A secondary CT.

WARNING

!

Before connecting a large CT to the PBVI board, note the CT
MUST have 1A secondary. Connecting a 5A secondary type CT
will damage the board and the CT.

To ensure the proper current ratio and accuracy, the CTs should
be purchased through Emerson Network Power. See Table 1 for
details. Contact your local Emerson Network Power
representative or call Liebert Services at 1-800-LIEBERT
(1-800-543-2378).

There can be up to two LIB boards per control board for a maximum total of sixteen 5-wire output
breakers.

3.4 Branch Circuit Monitoring Sensor Module (BSM)

The BSM—more commonly referred to as the CT Module—is packaged in an epoxy-filled plastic
assembly. There are two designs: one for 1" center-to-center GE panelboards and one for 3/4" center­to-center for Square D panelboards. Each contains twenty-one 50A CTs that are rated up to 50A RMS
50/60 Hz.

Major Components

NOTE

The diameter of each CT hole is 0.354" (9mm). Wire diameter and thickness of insulation
cannot be larger than the CT opening.

For the 42-breaker position in-line panel boards, the Square D CT Module is designed to interlock end
to end to maintain alignment between the breaker poles and the CT Module.

3.5 Power Supply Assembly (with EMI Filter)

The power supply assembly is 120-240VAC (range +6, -13%) 50/60 Hz input, 24VDC output to provide
logic level power for the BCB.

6

4.0 INSTALLATION

WARNING

!

Dangerous voltages exist in power distribution units and power conditioning units. To ensure
maximum safety, all circuits breakers in the panelboard should be removed of power and the
input feeder breaker should be turned off and locked-out in accordance with NEC and local/
state code.

NOTE

Installation of Liebert LDM components or other monitoring devices should be performed by
qualified personnel only.

This section provides instructions for installing and connecting Liebert LDM current transformers. If
service needs to be performed on any Liebert LDM component, contact Emerson Network Power Lie­bert Services at 1-800-LIEBERT (1-800-543-2378) for assistance.

4.1 Installing a BSM (CT Module Assembly)

In most cases the BSM—the CT Module—is factory-installed and no further work is required. If you
need to add a CT Module, it attaches easily to the side of a panelboard to monitor any combination of
1-, 2- and 3-pole circuit breakers.

• For side-by-side panelboards (21 circuits on each side), attach one
CT Module to each side of the panelboard, ensuring that the center of
the CT hole lines up to the branch circuit breaker connection.

• For SqD Inline panelboards (42 circuits in a row), the two CT Mod­ules must be interlocked to monitor 42 inline circuits. Flip the second,
lower CT Module so that the two cutout sections line up, then attach
the screws to secure the CT Modules to the panelboard.

• For GE Inline type panelboards, the two CT Modules fit end to end.
Flip the second, lower CT Module so that the 50-pin ribbon cable con­nector, mounted on the bottom of the CT Module, lines up with the hole
in the panelboard mounting bracket.

Installation

Install the circuit breakers according to the manufacturer’s documentation.
Route the circuit wire through the center of the CT and attach securely to
the circuit breaker.

4.1.1 Connecting Panelboards A and B

The CT Module connects to the BCB via a 50-pin ribbon cable
attached to the back of the CT Module. Route the ribbon cable
and attach to the appropriate connector (see figure at right).

There are four connectors that are labeled for easy identification:
two for Panelboard A (A1 and A2) and two for Panelboard B
(B1 and B2).

• Connect the CT module that will monitor Circuits 1-21 to the
A1 or B1 connector, depending on whether the CT Module is
connected to Panelboard A or B.

• Connect the CT module that will monitor Circuits 22-42 to
the corresponding A2 or B2 connector.

Circuits
Monitored

1-21 A1 B1

22-42 A2 B2

To configure branch circuits, see 5.5.12 - Adding a Circuit Breaker.

Panelboard A

Connector

Panelboard B

Connector

7

4.2 Installing a Solid-Core Current Transformer

WARNING

!

A solid-core CT cannot be installed on a wire while current is flowing through the wire.
Damage to burden resistor and CT will occur. Power needs to be removed prior to installing
and/or removing any CT. CTs should be installed by qualified electricians only.

The CT for the panelboard main input circuit breaker is hard-wired to the connectors. Removing CT
wires from the connector requires a pin extraction tool. Contact Liebert Services at 1-800-LIEBERT
(1-800-543-2378) for assistance.

Installation

NOTE

When replacing or installing a CT, ensure the replacement CT has a secondary rating of 1A—
for example, 100:1, 200:1 or 500:1. Using a higher-rated CT—for example, 100:5 or 500:5—will
damage the burden resistors on the PBVI board.

Typically the three-phase and neutral wires utilize a CT rating of 100:1, 200:1 or 500:1, while the
ground wire utilizes a CT rating of 100:1.

Route the circuit wire through the core of the CT and wire-tie the CT to the cable. Refer to the manu­facturer’s documentation for proper orientation to ensure accurate readings. Generally, CTs have an
arrow, white dot or similar marking to indicate how to position the CT.

For the Liebert LDM, CTs have a white dot that must face the source on the three-phase wires and
must face the load on the neutral and ground wires.

NOTE

When installing CTs for a large branch circuit breaker or subfeed, verify which monitoring
board is installed.

• A PBVI board can support one subfeed per panelboard (if neutral and ground will be
monitored) or up to three subfeeds if neutral and ground are not monitored.

• One LIB can support up to eight output and/or subfeed breakers.

• Two LIB boards are provided to support up to 16 output and/or subfeed breakers.

8