5Th Harmonic Input Filter; Introduction; Specification; Notes On Connection - Liebert 7400 Series User Manual

Chapter 4 - Optional equipment

5th Harmonic Input Filter

5th Harmonic Input Filter
4.7
4.7.1

Introduction

4.7.2

Specification

4.7.3

Notes on connection

4-18
Issue 2
(02/98)
6310018a.02.doc
An optional input 5th harmonic filter can be added to the 6 pulse 7400
series UPS to improve the UPS input power factor and reduce the
amount of electrical noise reflected into the input three phase supply.
On units upto 200 kVA the filter components are contained in a purpose-
built cabinet which is positioned alongside the main UPS equipment and
connected in series with the UPS input supply. In the case of the 300/400
kVA models the input filter is located within the UPS as illustrated in
figure 4-12. The filter components are matched to the UPS capacity,
resulting in different part numbers for each system as follows:
80kVA filter cabinet
120kVA filter cabinet
kg.200 kVA filter cabinet
kg.300 kVA filter (internal)
400 kVA filter (internal)
Input voltage
Input voltage tolerance
Nominal frequency
Input frequency tolerance
UPS input current distortion
UPS input power factor
Dimensions (80-120 kVA)
Dimensions (200 kVA)
The 80 - 200 kVA module input filters have a manually operated isolator
I2 plus internal fuse protection. The 300 kVA and 400 kVA filter when
fitted is connected permanently in circuit between the UPS input isolator
and inductor L1. The circuit position of both types of filter are shown in
figure 4-8.
The block diagram in figure 4-9 and the models'connections in figures 4-
9, 10, and 11 , illustrate the installation with a "split bypass" supply
configuration.
Note: The input Neutral connection must always be connected to the
bypass input 'N3'on the UPS.
If the UPS is configured to operate with a "common bypass", a three
phase supply with a separate neutral, or a standard four wire input, may
be used. The bypass supplies may be linked via the input connections of
the filter input isolator I1 or at a junction box/external isolator prior to
the supplies entering the filter cabinet. Ensure all internal links between
the UPS input and bypass bus bars are removed so that the filter does not
carry any bypass supplies. The Neutral must be terminated at the UPS
bypass input terminal 'N3', as shown in figure 4-11 for the 200 kVA
model.
Note: The Neutral connection 'N1'on each input filter Isolator I1 is a
convenient point to terminate or link the Neutral cable. It is not
connected internally to the input filter.
7400 Series UPS User Manual
Single Module and One plus One Systems
Part No. Weight
5331016 C 220kg.
5331018 E 240
5331020 G 280
4641010 K N/A
4641013 N N/A
380-400-415, three phase.
15%.
50Hz.
±5%.
10% max. at full load.
>0.9 lag.
600 x 800 x 1800 mm.
600 x 800 x 1900 mm.