Vertiv Liebert Load Bus Sync Controller, User Manual

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Vertiv
™
| Liebert
®
Load Bus Sync
™
Controller Installation Manual | 2
1.0 INTRODUCTION
The Liebert
®
Load Bus Sync
™
Controller is an option designed for use in complex power source
systems consisting of different distributions and static switches supplied by Vertiv
™
and other
manufacturers. It provides synchronization between the Liebert® NX
™
225-600V and third-party
UPS systems when synchronization cannot be guaranteed by the system configuration or when
temporary conditions prevent it (e.g., during battery operation).
The Liebert
®
Load Bus Sync
™
Controller is available as an option with the Liebert® NX
™
225-600V,
either as a factory-installed option or as a kit that is installed and configured by Vertiv
™
-trained
and certified personnel.
Examples of configurations where the Liebert
®
Load Bus Sync
™
Controller can be used:
• Installation consisting of two Liebert
®
NX
™
225-600V units
• Installation consisting of a Liebert
®
NX
™
225-600V and electrical generating devices
• Installation consisting of a Liebert
®
NX
™
225-600V and third-party UPS systems.
The Liebert
®
Load Bus Sync
™
Controller option consists of an electronic unit housed in a metal
box that can be mounted near the UPS or inside the electrical distribution panel.
The Liebert
®
Load Bus Sync
™
Controller requires a 480V input reference supply and can be used
to supply two units. When installing the unit inside a distribution panel or UPS, ensure that the
metal box is secured so that it cannot fall or touch metal parts containing hazardous voltages.
Vertiv
™
recommends that the unit not be installed behind the second access panel or in front of
the Liebert
®
NX
™
air inlet vents.
The device operates by identifying one of the connected units as the master and using its
frequency as a reference for the other units (slaves). While a non-Liebert® UPS can be used as
the master, only Liebert® UPS’s can be used as slave units. Depending on their configuration, the
slave units will follow the reference frequency all the time, or only when their reserve utility supply
is out of tolerance. The reference frequency will be generated only when the master utility supply
line is within acceptable limits.
The Liebert
®
Load Bus Sync
™
Controller can drive up to two separate units. These units may be
independent of each other or connected in a parallel system. Where the installation consists of
more than two slave units, or the master/slave configuration is not the preferred option, Vertiv
™
suggests using Liebert
®
MultiBus Synchronization Module
™
(MBSM), Part No. 10B14545G1.
The Liebert
®
Load Bus Sync
™
Controller does not affect the system’s mean time between failure
(MTBF)—it is not a single point of failure for the system). The individual units will ignore this
signal if it is outside the acceptable limits.
1.1 Installation Kit - 10B14515G1
The equipment is supplied with the following components:
Table 1 Installation Kit - 10B14515G1 components
Item
Description Part #
Quantity
1 Circuit Board 10B10877G1 1
2 Metal Enclosure — 1
3 RJ-45 Short Cable 10H54910P15 1
4 Installation Manual 10H92873 1
5 Female IEC 10 A plug 10H46776P01/02 1