Liebert
®
S t a t i c Tr a n s f e r S w i t c h 2
Power Conversion and Distribution
THE CORNERSTONE OF
HIGH-AVAILABILITY POWER SYSTEMS
Complete Front-Access
Color Touchscreen Monitor
Triple-Redundant, Self-Correcting Logic
Internal Dual-Bus Control Power
Simplified Installation & Maintenance
CORNERSTONE OF
HIGH-AVAILABILITY POWER
The solid-state bus transfer switch is the enabling technology behind dual-bus power systems. These devices are connected between
your critical load and the outputs of two independent UPS systems. If the primary UPS should fail, the switch will automatically
transfer the loads to the surviving UPS.
Liebert is the market leader in dual-bus power systems, building the world’s most reliable UPS and Static Transfer Switch products.
2
The new Static Transfer Switch 2 (STS 2) further extends our market leadership with design benefits unmatched by other products.
True Internal Redundancy
True Front-Access Design
All mechanical and electronic components of the STS 2
The STS 2 has triple-redundant logic. Each DSP
are accessible from the front of the unit. This gives you
controller is capable of working independently, and
several immediate benefits:
each helps monitor the other two. If one malfunctions,
• Greater freedom in system design. The STS 2 can be
the other two lock it out. Each controller has power
feeds from both power supplies.
placed adjacent to or in back of other equipment.
The two power supplies feature true dual-bus power
It can also be placed against a wall or partition.
• Simplified installation, with ample space for cable
connections through top and bottom access plates.
distribution. Both have dual inputs, one from each AC
input source. All power connections have diode protection,
so that internal or external faults cannot propagate.
• Less floor space required for maintenance access.
The result is a rugged, fault-resilient package that is
• Simplified maintenance, with all key components
optimized for real-world applications.
visible and accessible from the front of the unit.
One-Line Diagram
Source 2
Source 1
K2 K3
CB1
CB2
K1
K2
CB4
CB3
System Output
K1 K3
CB5
Color Touch-Screen Interface
The controls of the STS 2 are intuitive and simple. The
pop-up menus are easy to understand and provide a
wealth of operational and diagnostic information.
The color LCD monitor is divided into three segments.
In addition to a system mimic diagram, there is a
Status/Alarm panel and a section dedicated to operator
instructions and menus. You benefit from improved
operator effectiveness, reduced training time, and less
chance of operator error.
Liebert Experience:
Greater Overall Value
The design of the STS 2 reflects our decades of
leadership in critical power and environmental systems:
• Conservative design margins and excellent overload
capacity. Can also be placed against a wall or partition.
• Designed for maintainability, with all power-train
components removable and serviceable from the front,
without shutting down the connected load.
• Internal CANBUS protocol: high-bandwidth communication between system components via twisted-pair
cables. Options can be added as simple network nodes.
• Full range of communications options to fit any
monitoring strategy.
All components are thoughtfully
arranged for straightforward installation
and maintenance.
•Three-pole switch configurations are standard, with
optional four-pole configurations. Three-pole systems
are field-upgradeable to the four-pole configuration.
For units up to 600 amps, the entire
power and control module can be
removed as an assembly.
Note the separate compartment for
option modules, upper right, for safe
and convenient field access.
The Liebert Experience means a wider variety of power
system solutions from one source. Ask your Liebert
representative for information about Liebert UPS products,
Precision Power Centers, Remote Distribution Cabinets
and space-saving PDU/Static Switch combination packages.
3
S t a t i c Tr a n s f e r S w i t c h 2
Amp
Rating
Heat
Output
Poles (KW)
Uncrated Dimensions
(WxDxH)
(inches)
(mm)
Uncrated
Weight
(lbs)
(kg)
Power Conversion and Distribution
Shipping Dimensions1
(WxDxH)
(inches)
(mm)
Shipping
Weight1
(lbs)
(kg)
100
3
0.8
30x32x77
762x813x1956
780
354
48x44x80
1016x1194x2032
880
399
250
3
1.37
30x32x77
762x813x1956
780
354
48x44x80
1016x1194x2032
880
399
400
3
2.04
38x32x77
965x813x1956
1200
544
48x44x80
1016x1194x2032
1300
590
600
3
3.08
38x32x77
965x813x1956
1200
544
48x44x80
1016x1194x2032
1300
590
800
3
4.03
84x32x77
2134x813x1956
2500
1134
86x47x80
2184x1194x2032
2600
1179
1000
3
5.09
84x32x77
2134x813x1956
2500
1134
86x47x80
2184x1194x2032
2600
1179
100
4
0.8
44x32x77
1067x813x1956
1130
514
48x44x80
1016x1194x2032
1230
560
250
4
1.37
44x32x77
1067x813x1956
1130
514
48x44x80
1016x1194x2032
1230
560
400
4
2.04
52x32x77
1321x813x1956
1620
737
60x47x80
1524x1194x2032
1720
782
600
4
3.08
52x32x77
1321x813x1956
1620
737
60x47x80
1524x1194x2032
1720
782
800
4
4.03
104x32x77
2642x813x1956
3100
1409
108x47x80
2743x1194x2032
3200
1455
1000
4
5.09
104x32x77
2642x813x1956
3100
1409
108x47x80
2743x1194x2032
3200
1455
Note: 1 Shipping dimensions and weight include the pallet and packing material. Actual weights will vary depending on installed options.
Voltage: 208, 220, 240, 480 or 600 VAC
(field selectable), +/- 10%
Frequency: 50 or 60 Hz (field selectable), +/- 5%
Short-circuit Withstand Capability: 100kA at
208VAC, 65kA at 480VAC
Sense and transfer time: 4ms maximum
Overload Capability: 125% for 10 minutes,
150% for 2 minutes
Operating Temperature: 0 to 40° C
Standard Features
• All components front accessible for installation
and service; no side or rear access required
• Color touch-screen LCD interface eliminates
mechanical pushbuttons
• Intuitive user interface with drop-down
menus and dialog boxes
• Triple-redundant DSP digital logic
• Dual-redundant power supplies
• 100% rated, fuseless design
• Hot-swappable circuit breakers
1050 DEARBORN DRIVE
P.O. BOX 29186
COLUMBUS, OHIO 43229
800.877.9222 PHONE (U.S. &
CANADA ONLY)
614.888.0246 PHONE (OUTSIDE U.S.)
614.841.6022 FAX
VIA LEONARDO DA VINCI 8
ZONA INDUSTRIALE TOGNANA
35028 PIOVE DI SACCO (PD)
ITALY
39 049 9719 111 PHONE
39 049 5841 257 FAX
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138 GLOUCESTER ROAD
WANCHAI
HONG KONG
852 2 572 2201 PHONE
852 2 831 0114 FAX
LIEBERT WEB SITE
Specifications
Operating Specifications
L I E B E R T CO R P O R AT I O N
• Flash memory enables firmware updates
while supporting critical load
• CANBUS internal control wiring
• Rack-out control/power assembly on
units up to 600A, to allow maintenance,
service, or full replacement without
disrupting the critical load
• 3-pole and 4-pole configurations
• Top and bottom cable entry
• Dual-lug installation bus with pem nuts
for single-hand installation and "hot"
torque service
• UL listed
Optional Features
• Full range of Open Comms™ hardware
and software
• Internal modem for dialing out alarms to
phone or pager
• Programmable output relays for custom
customer alarms and connections
• Customizable input relays allow alarms
from other devices to be displayed on
STS 2 display
www.liebert.com
http://www.liebert.com
24
X
7 TECH SUPPORT
800 222 5877 PHONE
614 841 6755 (OUTSIDE U.S.)
While every precaution has been taken to ensure accuracy and
completeness in this literature, Liebert Corporation assumes no
responsibility, and disclaims all liability for damages resulting
from use of this information or for any errors or omissions.
© 2002 Liebert Corporation. All rights reserved throughout
the world. Specifications subject to change without notice.
All names referred to are trademarks or registered trademarks
of their respective owners.
® Liebert and the Liebert logo are registered trademarks
of the Liebert Corporation.
® Keeping Business in Business is a registered trademark
of the Liebert Corporation.
The Emerson logo is a trademark and service mark
of Emerson Electric Co.
SL-20600 (10/02)
Printed in USA