S&C PureWave Installation guide

October 9, 2017
© S&C Electric Company 2017, all rights reserved Instruction Sheet 653-506
S&C PureWave®UPS System
250 kW - 2 MW (313 kVA - 2.5 MVA)
208 - 600 Volts
Table of Contents
Section Page Section Page
Introduction
Qualified Persons ..............................2
Read this Instruction Sheet.......................2
Retain this Instruction Sheet......................2
Proper Application..............................2
Warranty .....................................2
Warranty Qualifications..........................2
Safety Information
Understanding Safety-Alert Messages ..............3
Following Safety Instructions .....................3
Replacement Instructions and Labels...............3
Hazardous Voltages ............................3
Location of Safety Labels ........................4
Safety Precautions
Insulated Hand Tools ..........................10
Emergency Procedures and Equipment ............10
Shipping and Handling
Inspection ...................................10
Components and Controls
Enclosure ...................................11
Power Electronic Switch and Switchgear Enclosure...14
Doors ......................................16
Air Control and Ventilation.......................16
Operating Controls ............................17
Monitoring Computer ..........................17
Operation
System Operation .............................18
Operating States..............................18
Transition States ..............................19
Contacts ....................................19
Remote Disable (Optional) ......................19
Operating Modes and Procedures ................20
Maintenance Bypass Procedure ...............20
Returning the PureWave UPS System
to the Ready State ..........................20
System Emergency Bypass Isolation Procedure ...20
Battery Charging Modes .....................21
Generator Interface .........................21
Alarms List and Troubleshooting Tips ..............22
Warning Alarms ............................22
Inhibit Alarms ..............................25
Bypass Alarms .............................25
Bypass Isolate Alarms .......................26
Monitoring
Overview....................................27
Monitoring Software Security ....................27
Monitoring Software ...........................27
Icons ....................................27
Displayed Parameters .......................29
Status Screen .............................29
Maintenance
Overview....................................30
Quarterly Maintenance .........................31
Annual Maintenance ...........................36
Operation and Maintenance

2S&C Instruction Sheet 653-506
Qualified Persons WARNING
The equipment covered by this publication must be installed, operated, and maintained by
qualified persons who are knowledgeable in the installation, operation, and maintenance
of electric power distribution equipment and the associated hazards. A qualified person is
one who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from nonlive
parts of electrical equipment
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltage to which the qualified person will be exposed
• The proper use of the special precautionary techniques, personal protective equipment,
insulating and shielding materials, and insulated tools for working on or near exposed
energized parts of electrical equipment
These instructions are intended only for such qualified persons. They are not intended to
be a substitute for adequate training and experience in safety procedures for this type of
equipment. Failure to comply can result in personal injury or even death.
Read this
Instruction Sheet NOTICE
Read this instruction sheet thoroughly and carefully before operating your S&C
PureWave UPS System. Familiarize yourself with the Safety Information and
Safety Precautions on pages 3 through 10. The latest version of this publication is
available online in PDF format at sandc.com/en/products/purewave-ups-systems/.
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your PureWave UPS System. Consult the supplier
of the batteries for additional safety instructions and procedures. Designate a location where
you can easily retrieve all information and refer to it. S&C PureWave UPS System and battery
instruction sheets must be available to all operators and other employees. If doors to the
electrical controllers or panels to the system enclosure must be opened, refer to the instruction
sheet for procedures for guarding against electric shock. Lockout and tagout procedures
should be developed and implemented in accordance with 29 CFR 1910.147.
Proper Application WARNING
The equipment in this publication must be selected for a specific application. The
application must be within the ratings furnished for the equipment.
Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set forth in
Price Sheet 150, plus any special warranty provisions, as set forth in the applicable product-line
specication bulletin, are exclusive. The remedies provided in the former for breach of these
warranties shall constitute the immediate purchaser’s or end user’s exclusive remedy and a
fulllment of all of the seller’s liability. In no event shall the seller’s liability to the immediate
purchaser or end user exceed the price of the specic product that gives rise to the immediate
purchaser’s or end user’s claim. All other warranties, whether express or implied or arising
by operation of law, course of dealing, usage of trade or otherwise, are excluded. The only
warranties are those stated in Price Sheet 150, and THERE ARE NO EXPRESS OR IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
ANY EXPRESS WARRANTY OR OTHER OBLIGATION PROVIDED IN PRICE SHEET 150
IS GRANTED ONLY TO THE IMMEDIATE PURCHASER AND END USER, AS DEFINED
THEREIN. OTHER THAN AN END USER, NO REMOTE PURCHASER MAY RELY ON ANY
AFFIRMATION OF FACT OR PROMISE THAT RELATES TO THE GOODS DESCRIBED
HEREIN, ANY DESCRIPTION THAT RELATES TO THE GOODS, OR ANY REMEDIAL
PROMISE INCLUDED IN PRICE SHEET 150.
Warranty
Qualifications
The seller’s warranties are contingent upon the installation and adjustment of the S&C
PureWave UPS System in accordance with S&C’s applicable instruction sheets, data sheets,
data bulletins, and/or information bulletins.
Introduction

S&C Instruction Sheet 653-506 3
Understanding
Safety-Alert
Messages
Several types of safety-alert messages may appear throughout this instruction sheet and on
labels attached to crate, packing, and equipment. Familiarize yourself with these types of
messages and the importance of these various signal words:
DANGER
“DANGER” identifies the most serious and immediate hazards that will likely result in
serious personal injury or death if instructions, including recommended precautions, are
not followed.
WARNING
“WARNING” identifies hazards or unsafe practices that can result in serious personal
injury or death if instructions, including recommended precautions, are not followed.
CAUTION
“CAUTION” identifies hazards or unsafe practices that can result in minor
personal injury if instructions, including recommended precautions, are not followed.
NOTICE
“NOTICE” identifies important procedures or requirements that can result in product or
property damage if instructions are not followed.
Following Safety
Instructions
If you do not understand any portion of this instruction sheet and need assistance,
contact your nearest S&C Sales Office or S&C Authorized Distributor. Their tele-
phone numbers are listed on S&C’s website sandc.com, or call S&C Headquarters
at (773) 338-1000; in Canada, call S&C Electric Canada Ltd. at (416) 249-9171.
NOTICE
Read this instruction sheet thoroughly and carefully
before installing or operating your S&C PureWave UPS
System.
Replacement
Instructions
and Labels
If you need additional copies of this instruction sheet, contact your nearest S&C Sales Ofce,
S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment be replaced
immediately. Replacement labels are available by contacting your nearest S&C Sales Office,
S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
Hazardous Voltages DANGER
Potentially lethal voltages are present inside the PureWave UPS System. Dc voltage
is present even without utility power connected. Hazardous voltages should also be
expected in all interconnecting components and lines.
To maintain safety, the user should use padlocks on each enclosure door. The doors and the
use of the padlocks provide protection against inadvertent contact with high-voltage circuits.
Safety Information

4S&C Instruction Sheet 653-506
Safety Information
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
AWARNING Keep out. Risk of electric shock. PE-70314
BDANGER High voltage! Keep out. PE-70236
CDANGER Hazardous voltage. PE-70315
DDANGER Keep out. Risk of electric shock. PE-70323
Location of Safety Labels
Front of the Enclosure
NOTICE
For safety labels, contact S&C Electric Company for the following:
• Exact location of the standard safety labels
• Project-specific safety labels
• Instructions on how to replace labels (reference the label part numbers as shown below)
A
A A
B
B C

S&C Instruction Sheet 653-506 5
Inside of Doors
Rear of the Enclosure
Battery bay door. Power conversion
module section
door.
Ac-filter capacitor
section door.
Control bay
left door.
Control bay
right door.
Safety Information
A
B
CC
C
C
D
C
A

6S&C Instruction Sheet 653-506
6.7 cal/cm Flash Hazard at 18 inch es
Cat 2 PPELevel. FRS HIRT & PA NTS
& COTTONU NDERWEAR
480V AC ShockH aza rd whenCo ver i s r emoved
1inch ProhibitedAppro ach - 500 V Class0 0 Gloves
58 inch Flash H azardBoundr y
42inch Limited Approach
12 inch Restricted Approa ch - 500 V Class 0 0 Gloves
EquipmentName
:PES
2
6.7 cal/cmF lashHaz ard at 18 inches
Cat 2 PPELevel. FRS HIRT &PANTS
& COTTON UNDE RWEAR
480V AC ShockHaz ard wh en Coveris removed
1inch Prohibited Approach - 500 V Cla ss 00 Glo ves
58 inc h Flash HazardBoundry
42inch Limited Approa ch
12 inch Restricted Approach - 500 V Clas s 00 Gloves
EquipmentName
: PES
2
6.7 cal/cm F lashHaza rd at18 i nches
Cat 2 PPELevel. FRS HIRT & PA NTS
& COTTON UNDERWEAR
480V AC ShockHaz ard wh en Cover is re moved
1inch ProhibitedApproach -500 V Class 0 0 Gloves
58 i nch Flash HazardBoundry
42inch Limited Approach
12 inch Restricted App roach - 500V Clas s 00 Gloves
EquipmentName
: PES
2
PureWave UPS System
TM
Front of the power electronic switch enclosure
Safety Information
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
EWARNING Arc flash and shock hazard. 6703-038
FDANGER Arc flash and shock hazard. 6703-030
GCAUTION High voltage. G-4900R2
GE F
E
F
G
E
F
GE
F
G

S&C Instruction Sheet 653-506 7
Safety Information
E
F
G
6.7 cal/cm Flash Hazard at 18 inch es
Cat 2PPEL evel. FR SHIRT& P ANTS
&COTTON UNDE RWE AR
480V A C ShockHazard whenCove r i sremoved
1inch ProhibitedApproach - 500 V Class 00 G loves
58 i nch Flash HazardBoundry
42 i nch Limited Approach
12inc h RestrictedApp roach - 500V Class 00 Gl oves
EquipmentName
:PES
2
6.7 cal/cm Flash Haza rdat 18 inches
Cat 2PPELevel. FRS HIRT &PANTS
&COTTON UNDERWEAR
480V AC ShockHaz ard when Cover is removed
1inch Prohibited Approach -5 00 V Class0 0 Gloves
58 i nch Flash HazardBoundry
42 i nch Limited Approach
12inch Restricted Approa ch -500 V Class0 0 Gloves
EquipmentName
: PES
2
E
F
G
G
Rear of the power electronic switch enclosure
6.7 cal/cmFl ashHaz ardat 18 inches
Cat 2 PPELevel. FR SHIRT& PANTS
&COTTON UNDERWEAR
480V AC ShockHazard when Coveris r emoved
1inch ProhibitedApproach - 5 00V Cla ss 00 Glo ves
58i nch Flash HazardBoundry
42inch LimitedApproa ch
12i nch Restricted Approach -500 VClass 00 Gl oves
EquipmentName
: PES
2
Left side of the power electronic switch enclosure Right side of the power electronic switch enclosure

8S&C Instruction Sheet 653-506
Safety Information
Reorder Information for Safety Labels
Location Safety Alert Message Description Part Number
HCAUTION Risk of electrical shock. PE-702121
JWARNING To reduce the risk of fire. PE-70286
KCAUTION Risk of electrical shock. PE-702100
LWARNING The bypass circuit breaker. PE-702113
MDANGER High Voltage. 6703-002
NCAUTION Risk of electrical shock. PE-70284
FUSESLOCATED
BEHINDTHISPANEL
F15 =200KA IR, 600VAC,
VSP100-2
F16 =200KA IR, 600 VAC,
VSP100-2
F17 = 200KA IR, 600 VAC,
VSP100-2
PE-702104
FUSESLOCATED
BEHINDTHISPANEL
F20-F21-F22=60A, 600 VAC,
JJS-60
PE-702105
WARNING
FUSES
LOCATED
BEHINDTHIS
PANEL
F40-F41-F42=30A,
600VAC
FNQ-R-30
PE-702139
FUSESLOCATED
BEHINDTHISPAN EL
F18-F19=8A, 600 VAC,
LPJ-8SP
PE-702108
CAUTION
RISKOFELECTRICAL SHOCK
SCRHEATSINKS ARE LIVE
DISCONNECTUPSBEFORE
SERVICING
CAUTION
RISKOFELECTRICAL SHOCK
SCRHEATSINKS ARE LIVE
DISCONNECTUPSBEFORE
SERVICING
CAUTION
RISKOFELECTRICAL SHOCK
SCRHEATSINKS ARE LIVE
DISCONNECTUPSBEFORE
SERVICING
N
J
M
S&CPureWave™UPS System
CATALOG
NUMBER
SERIALNUMBER
DATEOFMANUFACTURE
VOLTAGERATING
CAPACITYRATINGS
AMPERES
FREQUENCY&PHASE
SHORT-CIRCUITRATINGS
AMPERES,RMSSYMMETRICAL
Caution:Beforeoper ating, inspecting ormaintaining
equipment,refertothe a pplicable S &C
instructionsheet
COVEREDBYONEORMOREO FTHE FOLLOWINGU .S. PATE NTS
4,894,764 5,943,246
S&CElectricCompany
Chicago,Illinois 60626
PE-70243
MadeinU.S.A.
RISK OF ELECTRICAL SHOCK
THISUPS RECEIVES POWER FROM MORE
THANONE SOURCE - DIS CONNECTIONOF
ALLAC SOURCES AND THE DC SOURCE
IS REQUIRED TO DE-ENERGIZE THE UNIT
BEFORESERVICING.
Left side of the power electronic switch enclosure (with door open) Rear of the power electronic switch enclosure (with doors open)
Inside front door of power electronic
switch enclosure
H

S&C Instruction Sheet 653-506 9
Safety Information
T2 T3 6T5T4T T7
BR2 BR3
PT1 PT2 PT3 PT4 PT5 PT6
F01
F02
F03
F04
F05
F06
F07
F08
F09
F10
F11
F1
2
WARNING
FRQ -R - 1
FRQ -R - 1
FRQ -R - 1
FRQ -R - 1
FRQ -R - 1
FRQ -R - 3
FRQ -R - 3
FRQ -R - 3
FRQ -R - 3
FRQ -R - 3
FRQ -R - 3
FUSE INFORMATION
F07-F12 = 1A, 600V VAC
FNQ-R-1
FRQ -R - 1
FUSE INFORMATION
F01-F06 = 1A, 600V VAC
FNQ-R-1
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE AND RATINGS
OF FUSES
T1
C1
BR1
TB2
S.C.
TB3
TB4
TB5
TB6
TB7
TB8
MC/1 MC/2 2/A 2/B
97
95 98/A 98/B 83/LBX
93/LB
TB1
R1
F13
F14
PE-702100
WARNING
WARNING
FUSE INFORMATION
F13 =1A, 600 VAC,
FNQ-R-1
F14 = 1A, 600 VAC,
FNQ-R-1
S25 F26
S23 F35 F34 F37 F36 F38F29F24 F33 F32
FUSE INFORMATION
F23 = 15A, 125 VAC, FNM-15
F24 = 4A, 250VAC, FNM-4
F25 = 15A, 125VAC, FNM-15
F26 = 4A, 250 VAC, FNM-4
F29 = 2A, 250 VAC, FNM-2
F32 = 2A, 250 VAC, FNM-2
F33 = 20A, 250 VAC, TRM-20
F34 = 4A, 250 VAC, FNM-4
F35 = 4A, 250 VAC, FNM-4
F36 = 4A, 250 VAC, FNM-4
F37 = 4A, 250 VAC, FNM-4
F38 = 4A, 250 VAC, FNM-4
SS1
MAINTENANCENORMAL
THE BYPASS CIRCUIT BREAKER AND INPUT/OUTPUT
BUSBAR CIRCUITS REMAIN ENERGIZED
DURING SERVICING PROCEDURE
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE AND RATINGS
OF FUSES
RISK OF ELECTRICALSHOCK OR ELECTRIC
ENERGY - HIGH CURRENT LEVEL
DANGEROUSELECTRICAL CHARGE MAY BE STORED
IN ELECTROLYTICCAPACITORC1 AND
ASSOCIATEDCIRCUITRY.
TESTBEFORE TOUCHING
WARNING
Top control panel assembly inside the power electronic switch enclosure
Bottom control panel assembly inside the power electronic switch enclosure
J
J
K
L

10 S&C Instruction Sheet 653-506
Safety Precautions
DANGER
The S&C PureWave UPS System operates at high ac and dc voltages. Failure to
observe the precautions below will result in serious personal injury or death.
Some of these precautions may differ from your company’s operating procedures and
rules. Where a discrepancy exists, follow your company’s operating procedures and rules.
1. QUALIFIED PERSONS. Access to the PureWave UPS
System must be restricted only to qualified persons. See
“Qualified Persons” on page 2.
2. SAFETY PROCEDURES. Always follow safe operating
procedures and rules.
3. PERSONAL PROTECTIVE EQUIPMENT. Always use
suitable protective equipment such as rubber gloves,
rubber mats, hard hats, safety glasses, and flash
clothing, in accordance with safe operating procedures
and rules.
4. SAFETY LABELS. Do not remove or obscure any of
the “DANGER,” “WARNING,” “CAUTION,” or “NOTICE”
labels.
5. OPERATING MECHANISM AND BASE. The PureWave
UPS System contains moving parts that can severely
injure fingers. Do not remove or disassemble operating
mechanism or circuit breakers or remove dead-front
access panels on the PureWave UPS System unless
directed by S&C Electric Company.
6. ENERGIZED COMPONENTS.Always consider all parts
live until de-energized, tested, and grounded.
7. GROUNDING. The PureWave UPS System enclosure
must be connected to a suitable earth ground or to a
suitable building ground for testing before energizing the
unit and at all times when energized.
8. MAINTAINING PROPER CLEARANCE. Always
maintain proper clearance from energized components.
Insulated Hand Tools Insulated hand tools are required when working on or around any energized equipment. Use
only properly rated tools for the energy present. Tool inventories should be kept to ensure all
tools that enter the system enclosure are removed before energizing the system.
Emergency
Procedures and
Equipment
The owner should develop policies and procedures for handling emergency situations. It is
the responsibility of the owner to develop site-specic emergency action plans for response
to such situations.
Shipping and Handling
Inspection
After the PureWave UPS System is commissioned and the unit is online, inspection and
maintenance should be scheduled on a regular basis to ensure proper system operation.

S&C Instruction Sheet 653-506 11
Enclosure
DANGER
Do not enter the system enclosures unless trained, certified, and authorized to do so by
S&C Electric Company. Physical entry into the enclosure should never be attempted while
the system is enabled or when the modules are online. Voltages up to 600 Vdc and 15
kVac should be expected under normal operating conditions. Dc voltage is present even
without the utility power connected.
The enclosure is meant to provide access for field-troubleshooting purposes only when
properly grounded. Never, under any circumstances, open the enclosure doors while it
is online or has not been fully discharged and grounded. Failure to do this can result in
equipment damage, personal injury, or even death.
Air conditioner
Transformer bay air outlet hoods
Transformer bay
(rear of enclosure)
Ac filter capacitor section
Control bay
Power control module section
Battery bay
Figure 1. Location of the bays, sections, and components of a 2.25-MW/2.5-MVA PureWave UPS
System enclosure.
Components and Controls

12 S&C Instruction Sheet 653-506
Transformer bay
Transformer bay air inlet hoods
Figure 2. Rear view of a PureWave UPS System enclosure, showing the transformer bay air inlet
hoods.
As shown in Figure 1 on page 11 and in Figure 2, the enclosure consists of the following bays:
• Battery bay
• Control bay
• Transformer bay
Battery bay - Each battery bay contains a 250-kW battery module and a power conversion
module (PCM) section. The PCM section contains the PCM, which is comprised of one inverter
module consisting of power-conversion electronics and controls. The PCM is panel-mounted
and supported by a welded and bolted steel structural base. See Figure 3 for a view of the
battery bay.
Battery
Power conversion
module (PCM)
Figure 3. View of the battery bay (with the door open).
Components and Controls

S&C Instruction Sheet 653-506 13
NOTICE
The battery bay in Figure 3 on page 12 shows the PCM section on the right side and the
battery module on the left side of the bay. These are right-hand battery bays.
At the rear of the enclosure, the PCM section and battery module configurations are
reversed, where the PCM is on the left side and the battery module is on the right side of
the bay. These are left-hand battery bays.
Control bay - The control bay houses the control system and ac lter capacitor section.
Inside of the control bay is a control panel which has a RESET pushbutton, an HVAC TEST
pushbutton, a CPC connector, and an ENABLE/DISABLE switch See Figure 4 for a view of
the control bay.
Ac filter capacitor section
Control panel
Figure 4. View of the control bay (with the doors open).
Transformer bay - The transformer bay, which is located at the rear of the enclosure, houses
the isolation transformer used to match the voltage of the critical load once the energy from
the system batteries is converted to ac. See Figure 5 for a view of the transformer bay.
Transformer
Figure 5. View of the transformer bay (with the door open).
Components and Controls

14 S&C Instruction Sheet 653-506
Components and Controls
Power Electronic Switch and Switchgear Enclosure
The power electronic switch (PES) and switchgear enclosure houses the PES, which is used to
switch the source from the utility/generator to the PureWave UPS System and vice versa. The
bypass circuitry is also housed in this enclosure, which consists of a source circuit breaker, a
load circuit breaker, and a bypass circuit breaker. See Figure 6. See Figures 7 and 8 on page
15 for the location of the other main components of the enclosure.
Control panels
Air conditioner
Source circuit breaker
Bypass circuit breaker
Load circuit breaker
Figure 6. Power electronic switch (PES) and switchgear enclosure (front view with doors removed).

S&C Instruction Sheet 653-506 15
Figure 7. Power electronic switch (PES) and switchgear enclosure (right side view).
Cooling air outletCooling air inlet
Figure 8. Power electronic switch (PES) and switchgear enclosure (rear view with doors removed).
Cooling fans
Power electronic switch
Components and Controls

16 S&C Instruction Sheet 653-506
Doors
To open a bay door, remove the padlock from the security hasp and pull the door handle.
Once the door is opened approximately 90 degrees or 135 degrees, engage the lock bar at the
bottom of the door to prevent the door from accidentally closing. See Figure 9.
Figure 9. Lock bar at the bottom of a bay door.
To close a door, disengage the lock bar by lifting it and returning it to its storage location.
Swing the door closed and secure the door handle.
NOTICE
To open the control bay door, the ENABLE/DISABLE keylock needs to be unlocked,
which would result in disabling the system.
Air Control and Ventilation
Components such as air conditioners and air-inlet and -outlet vent/vent hoods are used to
regulate the air inside the enclosure. Periodic maintenance is required to ensure the air
conditioners, air-inlet lter, vents, and hoods are clear of debris or obstructions that can
restrict air owing in and out of the PureWave UPS System enclosure. Refer to the maintenance
instruction sheet for detailed instructions for proper air ventilation maintenance.
Components and Controls

S&C Instruction Sheet 653-506 17
Operating Controls
CAUTION
Access and operation of the controls should be performed by authorized personnel who
have been trained in using and servicing the PureWave UPS System. Failure to do so can
result in damage to the equipment.
Service operating controls are located on the control panel inside the control bay. The service
operating controls are ENABLE/DISABLE, RESET, HVAC TEST, and CPC (connection).
ENABLE/DISABLE – This toggle switch permits the operator to select whether the system
is enabled or disabled. With the switch in the Enable position, the system is enabled. With
the switch in the Disable position, the system is disabled. When the system is disabled, the
system will go to the Bypass Isolate state, connecting the utility to the load though the
bypass circuit breaker. The bypass circuit breaker will be closed, and the input and output
isolation circuit breakers will be opened.
RESET – This pushbutton allows the operator to manually reset the system alarm(s). When
the system is in the Bypass state and the RESET pushbutton is pushed, all latched alarm(s)
will be reset if the alarm(s) have cleared.
HVAC TEST – This pushbutton allows authorized service personnel to perform periodic
maintenance testing of the heating, ventilation, and air conditioning systems of the PureWave
UPS System enclosure.
CPC – This connector allows authorized service personnel to connect to the PureWave UPS
System for testing purposes.
Monitoring Computer
The monitoring computer, if purchased, is used to monitor the PureWave UPS System by
logging events and displaying active alarms and real-time parameter measurements. The
computer is installed at a location determined by the end-user.
Components and Controls

18 S&C Instruction Sheet 653-506
System Operation
Under normal conditions, power is supplied from the utility grid to the critical load through
the input circuit breaker, power electronic switch (PES), and output isolation circuit breaker.
The system’s utility disturbance monitor (UDM) continuously monitors the supply voltage
for a disturbance activity. When a disturbance occurs, the PureWave UPS System turns on the
system’s high-power inverter(s). The stored energy in the system’s batteries is converted to ac
and supplied through a voltage-matching isolation transformer while the PES is commanded
off (open) to isolate the customer’s critical loads from the faulted utility. Output power matches
the customer load for one minute at full load (or up to three minutes at reduced power) during
the utility voltage disturbance or momentary power interruption.
The entire transfer sequence occurs typically within 1 to 4 milliseconds (less than ¼ cycle).
An electrically operated bypass circuit breaker permits continued service to the customer
from the utility in the event the PureWave UPS System is out of service for maintenance. See
Figure 10 for a diagram of the PureWave UPS System.
Figure 10. Diagram of the PureWave UPS System.
Operating States
Listed in Table 1 are the operating states of the PureWave UPS System. Depending on the
alarm condition encountered, the system can be in any of these states. The user interface
shall inform the user of the system’s present state. Table 1 lists and describes each state.
Table 1. Operating States for the PureWave UPS System.
States Description
Ready In this state, the PureWave UPS System is ready to
protect the load in the event of a disturbance.
Run In this state, the PureWave UPS System is running to
protect the load from a utility disturbance. The inverters
are on, and the PES is open.
Inhibit In this state, the PureWave UPS System has been
inhibited from running; however, the load is being fed
through the PES. The bypass circuit remains open.
Bypass In this state, the bypass circuit breaker has been closed;
however, the input and output circuit breakers remain
closed.
Bypass Isolate In this state, the bypass circuit breaker is closed, and
the input and output circuit breakers are open.
Test in Bypass This state is used during the startup of the PureWave
UPS System or during service. This state permits the
system to perform runs while the load is being fed
from the utility through the bypass circuit breaker. In
this state, the bypass circuit breaker is closed, and the
output circuit breaker is open.
Operation

S&C Instruction Sheet 653-506 19
Transition States
Listed in Table 2 are the transition states of the PureWave UPS System. These temporary
states occur while the PureWave UPS control logic is transitioning from one primary state
to another primary state. Primary states are listed in Table 1 on page 18.
Table 2. Transition states of the PureWave UPS System.
States Description
Reset This state is used to reset PureWave UPS System
alarms.
Force Off PES This state is used to command the PES off. The PES
remains off for the duration of the Run state, keeping
the load isolated from the utility.
Close Mechanical Bypass This state occurs as the PureWave UPS System is
going to the Bypass state. During this transition state,
the controls are commanding the bypass circuit breaker
closed before transitioning to the Bypass state.
Soft Transfer The PureWave UPS System enters this state at the
end of a Run state. In this state, the load is being
transferred to the utility or an optional generator to
gradually prevent a voltage or frequency drop that could
potentially affect the load.
Load Decelerate This state is an optional state that will disconnect the
load from the utility if the PureWave UPS System cannot
run (because of discharged batteries or from a UPS
malfunction) and if the load is not in phase with the
utility. The purpose of this state is to prevent spinning
loads (motors) from being damaged by transferring
them from the PureWave UPS System to the utility
when the UPS output voltage is not in phase with the
utility voltage. The loads will be permitted to decelerate
before being re-energized.
Contacts
The following alarm contacts are available as standard for the PureWave UPS System and
can be used to activate a customer supplied device:
System Warning: The System Warning contact will annunciate upon any warning alarm.
Warning alarms indicate a condition that requires attention. However, the Pure Wave UPS
System remains in the Ready state, protecting the load from power disturbances.
System Fault: The System Fault contact will annunciate upon any alarm that will place
the PureWave UPS System in the Inhibit state, Bypass state, or Bypass Isolate state. System
faults indicate a condition that requires attention and that the PureWave UPS System is not
protecting the critical load from power disturbances.
The following optional contacts are available. The contacts operate as follows, if provided:
Low Battery: The Low-Battery contact will annunciate during a PureWave UPS System run
after 50% of its run-time has been used. The contact will annunciate at 30 seconds during a
run at full-load.
Load Overcurrent: The Load Overcurrent contact will annunciate an alarm when the load
current exceeds 115% of the current rating the PureWave UPS System is capable of providing.
UPS Running: The UPS Running contact will annunciate when the PureWave UPS System
is in the Run state.
Remote Disable (Optional)
If supplied, a normally closed input contact must be provided by the user to the PureWave
UPS System. Upon opening of the input contact, the system will go to the Bypass state and
an output contact will close to indicate the system has been remotely disabled.
Operation

20 S&C Instruction Sheet 653-506
Operating Modes and Procedures
The following procedures can be used to operate the PureWave UPS System:
WARNING
The following procedures should be followed by authorized personnel who are trained in
operating the PureWave UPS System. Failure to do so can result in injury or equipment
damage.
Maintenance Bypass Procedure
Use the following procedures to put the PureWave UPS System into the Bypass state:
STEP 1. Disable the PureWave UPS System by turning the ENABLED/DISABLE selector
switch to Disable mode.
NOTICE
When the switch is in the Disable position, the bypass circuit breaker will automatically
close and, after a short time delay, the output and input circuit breakers will open.
STEP 2. Verify the PureWave UPS System’s input and output circuit breakers are open and
the bypass circuit breaker is closed. If the bypass circuit breaker did not close and
the input and output circuit breakers did not open, follow the “System
Emergency Bypass Isolation Procedure” below.
Returning the PureWave UPS System to the Ready State
The following procedure provides the means for returning the PureWave UPS System to the
Ready state from the Bypass state:
STEP 1. Verify the input and output circuit breakers are open and the bypass circuit breaker
is closed.
STEP 2. Re-enable the PureWave UPS System by turning the ENABLE/DISABLE selector
switch.
STEP 3. Reset the PureWave UPS System by pressing the RESET pushbutton.
System Emergency Bypass Isolation Procedure
In the event the bypass circuit breaker does not close and the input and output circuit breakers
do not open after the maintenance bypass procedure has been implemented, the PureWave
UPS System can be placed in the Bypass state manually by using the following procedure:
STEP 1. Make sure the ENABLE/DISABLE selector switch is in the Disable position.
STEP 2. Manually close the bypass circuit breaker and isolate any external controls .
Note: The PureWave UPS System may be manually isolated from the utility and load by
manually opening the input and output circuit breakers and isolating any external controls.
NOTICE
If further assistance is needed with the above system emergency bypass isolation
procedures, please contact S&C Electric Company.
Operation
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