Liebert SmartSwitchTM User Manual
OWER PROTECTION
P
SmartSwitch™
Automatic Transfer Switch
Installation and
Operation Manual
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.2 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1.3 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 UNPACKING AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Input and Output Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4 Control Wiring Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.0 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Description of SmartSwitch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 RS-232 Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.0 OPERATOR CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1 Bypass/Transfer Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.0 OPERATING GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
i
FIGURES
Figure 1 Typical SmartSwitch One-Line Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2 Typical 15 to 20 Amp SmartSwitch Rackmount Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3 Typical 25 to 60 Amp SmartSwitch Underfloor / Wallmount Unit . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4 Typical Input and Output Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5 Control Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6 Bypass / Transfer Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TABLES
Table 1 SmartSwitch™ Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Table 2 SmartSwitch Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 3 RS-232 ASCII Communication Port Customer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4 Example View Status Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 Example View Event Log Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6 Example View Settings Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 7
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MPORTANT SAFETY INSTRUCTIONS
I
WARNING
!
THERE ARE NO USER-SERVICEABLE PARTS INSIDE THE
REMOVABLE ELECTRONICS MODULE. OPENING OR
REMOVING THE COVER OF THE REMOVABLE ELECTRONICS
MODULE MAY EXPOSE HAZARDOUS VOLTAGES, EVEN WHEN
THE SMARTSWITCH™ IS IN BYPASS. DO NOT ATTEMPT TO
SERVICE THIS PRODUCT YOURSELF. REFER ALL SERVICING
TO QUALIFIED SERVICE PERSONNEL.
NOTE
Read the entire User’s Manual before installing and operating the
SmartSwitch. Adhere to all operating instructions and warnings on the
unit and in this manual.
Liebert Corporation neither recommends nor knowingly sells this product
for use with life support or other FDA-designated “critical” devices.
The SmartSwitch is suitable for indoor use only. Protect unit from
excessive moisture and install in an area free from flammable liquids,
gases, or corrosive substances.
The unit is designed to operate from solidly grounded AC power sources
only. Provide input overcurrent protection in accordance with the unit
ratings. Wire and ground the unit according to national and local
electrical safety codes.
CAUTION
!
The unit is supplied by two power sources. Unit may be
electrically live if either of the two input sources is ON, even
when the electronics module is removed. To isolate the unit, turn
OFF and lock out BOTH input power sources.
CAUTION
!
If unit is furnished with input power plugs, the ground (earth)
leakage current must not exceed 2.75 milliamperes. Most
information technology equipment meets this requirement if no
more than 4 pieces of equipment are powered from this unit. Note:
These instructions may be modified by local wiring regulations.
CAUTION
!
This unit complies with the limits for a Class A digital device,
pursuant to Part 15 Subpart J of the FCC rules. These limits
provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates
radio frequency energy and, if not installed and used in
accordance with this instruction manual, may cause harmful
interference to radio communications. Operation of this unit in a
residential area may cause harmful interference which the user
must correct at his own expense.
1
1.0 I
Figure 1 Typical SmartSwitch One-Line Diagram
NTRODUCTION
The SmartSwitch™ is an automatic transfer switch designed to provide fast automatic transfers
between two independent, synchronous AC power sources to provide continuity of AC power to
critical equipment, such as information technology equipment, despite irregularities in either of
the two AC input power sources. The transfer is accomplished with sense and transfer times of
less than 6 milliseconds. The SmartSwitch is available in a 2, 3, or 4 pole configurations, with
ampacities of 13, 15, 20, 25, 30, 50, or 60 amps, in a floor, wall, or rack mount packages. Inputs
may be hardwired or plug connected to the two input branch circuits. Outputs may be receptacles
or hardwired connected to the load equipment.
The SmartSwitch consists of two modules, a fixed module containing the input and output connections and bypass switch with a compartment that holds the plug-in and removable electronics/
switching module. Figure 1 shows a typical one-line schematic diagram of the SmartSwitch.
1.1 Specifications
1.1.1 General Specifications
• Manual and Automatic Transfers.
• Sense and Transfer Time: Less than 6 milliseconds.
• Break-Before-Make Switching.
• Selectable Preferred Source.
• Selectable Auto/Manual Retransfer.
• Retransfer Time Delay: 1 to 60 seconds adjustable.
• In-Phase Transfer Window: 1 to 20 degrees adjustable.
• Output Overload Transfer Inhibit: 1 to 10 times full load current adjustable.
• Programmable Switch Self Test.
• Convection Cooling.
2 Introduction
1.1.2 Electrical Specifications
• Nominal input voltage
120 or 208 volts single phase 2W+G, 60 Hz
220, 230, or 240 volts single phase 2W+G, 50 Hz
208/120 volts single phase 3W+G, 60 Hz
208 volts three phase, 3W+G, 60 Hz
208/120 volts three phase, 4W+G, 60 Hz
380, 400, or 415 volts three-phase 3W+G, 50 Hz
380/220, 400/230, or 415/240 volts three phase 4W+G, 50 Hz
Solidly grounded power sources
• Branch circuit breaker rating
15, 20, 30, or 60 amps, 60 Hz
13, 25, or 50 amps, 50 Hz
• Maximum continuous current
12, 16, 24, or 48 amps, 60 Hz
13, 25, or 50 amps, 50 Hz
• Load power factor range: 0.5 to 1.0, leading or lagging.
• Load crest factor: up to 3.5.
• Source voltage distortion: up to 10% THD.
• Overload capability: 125% of continuous current for 2 hours, 1000% for 2 cycles minimum.
• Overcurrent Protection: External overcurrent protection provided by the supply branch cir-
cuit breakers.
• Short circuit withstand capability: up to 20,000 symmetrical amps, protected by internal fus-
ing.
• Withstands Transient Voltage Surges up to 6 kV as defined by IEEE C62.41 for Category A3.
• Meets FCC Part 15 Class A Emission Limits.
• ETL Listed under UL Standard 1008.
• 50 Hz units are CE marked for compliance with the EMC and Low Voltage Directives.
• Redundant Control Power Supplies.
• Integral Maintenance Bypass.
• Eight Isolated Normally Open, Form A Switch Status Contacts.
• RS-232 Communications Port
• Hot-Swap, Plug-In Electronics Module.
1.1.3 Environmental Specifications
• Storage temperature range: -40° to +60°C
• Operating temperature range: 0° to 40°C.
• Relative Humidity: 0 to 95% without condensation
• Operating Altitude: up to 5000 feet (1500 meters) above sea level without derating.
• Storage/Transport Altitude: up to 40,000 feet (12,000 meters) above sea level.
• Audible Noise: less than 45 dBA at 5 feet (1.5 meters).
Introduction 3
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