Operating Principles; System Layout; Internal Battery Layout - Tripp Lite SU60KX Manual

1 Basic Operation (continued)

1.3 Operating Principles

1.3.1 System Layout

MAIN
BATTERY
MAIN
BATTERY
The SU-Series 3-Phase UPS is confi gured with 3-phase 20kVA power modules that can be paralleled for redundancy or capacity upgrades. Each
KX- (Figure 1.3.1a), K- , and KTV-series (Figure 1.3.1b) UPS includes three key functions:
1) A central bypass static switch, which causes a critical load to automatically bypass any overload or fault conditions that occur.
2) A maintenance bypass switch, which eliminates UPS faults by supplying a critical load.
3) A matched transformer, which increases and decreases the input/output voltage

1.3.2 Internal Battery Layout

An internal battery pack (number of packs vary by model) supplies the UPS system with battery backup power. Each internal battery pack consists
of 40 12Vdc VRLA batteries arranged in two strings: one string of 20 positive batteries (black cable) and one string of 20 negative batteries (red
cable). The two strings are connected by a neutral (N) point (Figure 1.3.2a).
Q3
Manual Bypass
Circuit Breaker
Manual Input
Bypass Input
Q2
Bypass Input
Circuit Breaker
Main
20kVA/3U POWER MODULE
Q1
Main Input
Circuit Breaker
20kVA/3U POWER MODULE
20kVA/3U POWER MODULE
20kVA/3U POWER MODULE
Fig 1.3.1a System Block Diagram for KX models
Q3
Manual Bypass
Circuit Breaker
Manual Input
Bypass Input
20kVA/3U POWER MODULE
XFMR
Q2
Q1
Bypass Input
Main Input
Circuit Breaker
Circuit Breaker
20kVA/3U POWER MODULE
20kVA/3U POWER MODULE
20kVA/3U POWER MODULE
Fig 1.3.1b System Block Diagram for K and KTV models
12Vdc, 20pcs
Fig 1.3.2a Battery Strings
STS
STS
XFMR
B+ N B-
12Vdc, 20pcs
13
Q4
LOAD
Output
Circuit Breaker
LOAD
Q4
Output
Circuit Breaker