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Flashcards in CC UPS Deck (78):
1

Q1 Breaker

Input isolation circuit breaker, used to isolate the UPS from the main AC input (mains 1) and provide input current protection.

2

QF1 Breaker

Battery disconnect circuit breaker, external to the UPS, used to disconnect the battery from the UPS.
QF1 provides isolation and protection between the UPS and its battery system.

3

Q4S Breaker

Bypass input circuit breaker; it is used to isolate the UPS from the bypass input (mains 2) source and provide back-feed protection

4

Q3BP

Maintenance bypass circuit breaker, used to supply the attached load via the bypass source while the UPS is being serviced.

5

Power Flow

Normal Operation

During normal operation, power flows from the main AC input source (mains 1) into the UPS rectifier/battery charger section. The rectifier/battery charger converts the AC voltage to DC, maintains the charge of the battery, and feeds the DC power to the inverter. The inverter regenerates AC voltage, and supplies the attached load.

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6

Power Flow

On Battery Operation

If the main AC input source (mains 1) fails or goes out of tolerance, the charger stops. Power flows from the battery to the UPS inverter, which in turn supplies the attached load. When the main AC input source (mains 1) returns, the charger restarts automatically and the UPS resumes its normal operation. .
If the battery becomes depleted before the main AC input source (mains 1) returns, the inverter stops and the attached load is transferred to the bypass AC input source (mains 2) if it is available.

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7

Front Panel

EPO Button

 

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On the left side of the front panel, an emergency power off (EPO) pushbutton is
provided, with a protective cover to guard against inadvertent operation. This
pushbutton, when activated, disconnects the main AC input (mains 1), bypass AC
input (mains 2), and battery power to the UPS, and disconnects output power to the
attached load.

8

Front Panel

1

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(item 1) The audible alarm provides an audible warning to the operator by sounding
a pulsed “beep” when any of the following conditions occur:
◗ Load transferred to bypass (mains 2)
◗ Load supplied via battery
◗ Operating problem
During minor alarm conditions, the alarm sounds at a slow rate and a low sound
level. When the battery approaches the low-voltage shutdown level, the alarm
sounds louder and at an increased rate. If the inverter shuts down, the alarm
sounds loudly and continuously.
An audible alarm reset is located on the hidden panel. See Figure 1-7. Pressing it
will silence the alarm. Should a higher-level alarm condition occur after the reset
has been activated, the audible alarm will sound the new alarm condition.

9

Front Panel

2

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(item 2 ) This red LED turns on when any of these conditions occur:
◗ The load is no longer protected following an inverter shutdown,
or the opening of the isolation circuit breaker (Q5N).
◗ The battery circuit breaker QF1 is open, making battery power
unavailable.

10

Front Panel

3

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(item 3) This orange LED turns on when an operating problem exists, such as fan
failure; static switch power supply fault; battery temperature fault;
overload fault; or bypass AC input (mains 2) out of tolerance. The UPS
continues to protect the attached load.

11

Front Panel 

4

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(item 4) This orange LED turns on to indicate that the attached load is
being partially or completely supplied by the battery. When the main AC
input (mains 1) fails or is outside tolerance, stored battery energy is
supplied to the inverter, which in turn supplies the load.

12

Front Panel 

5

Q image thumb

(item 5) This green LED indicates that the attached load is supplied by
the inverter and protected by the battery. During normal operation, this
LED is the only one that is on.

13

Front Panel 

6

Q image thumb

(item 6) This green pushbutton is used to start the inverter. When it is pushed, the
green “load protected” LED flashes for three seconds, indicating that the start
command has been received. When the inverter has synchronized with the bypass
AC input (mains 2) source, the static switch transfers the load to the inverter output.
If the inverter cannot synchronize to the bypass AC input (mains 2) source, the load
must be forced to transfer using the hidden panel (see section 2.11, Forced
Transfers).

14

Front Panel 

7

 

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(item 7) This gray pushbutton is used to stop the inverter. When it is pressed for 3
seconds, the inverter stops and the load is transferred to the bypass AC input (mains
2) source. If the uninterrupted transfer conditions are not met, this pushbutton has
no effect and the inverter can be stopped only from the hidden panel (see Section
2.12, Forced Transfers).

15

What is this?

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Alphanumeric Display and Controls

16

Settings Button

This pushbutton is used to select the display language and adjust the LCD screen
contrast for optimal viewing.

17

Selection Button

Depending on the displayed message, the “˘” key may serve to indicate selection,
negative response, and other functions.

18

Voltage Button

This pushbutton provides access to voltage measurements, including:
◗ Main AC input (mains 1) phase-to-phase voltage
◗ Bypass AC input (mains 2) phase-to-neutral and phase-to-phase voltage
◗ Inverter output phase-to-neutral and phase-to-phase voltage
◗ Load phase-to-neutral and phase-to-phase voltage

19

Current Button

This pushbutton provides access to current measurements, including:
◗ Main AC input (mains 1) current
◗ Bypass AC input (mains 2) current
◗ Inverter output current
◗ Load current
◗ Percent current drawn by the load relative to UPS rating
◗ Crest factor per phase

20

Power/Freq. Button

This pushbutton provides access to power and frequency measurements, including:
◗ Main AC input (mains 1) frequency
◗ Bypass AC input (mains 2) frequency
◗ Inverter frequency
◗ Power drawn by the load (in kW and kVA)
◗ Load power factor

21

Battery Button

This pushbutton provides access to battery measurements, including:
◗ Battery voltage
◗ Battery current
◗ Battery ambient temperature
◗ Battery time available
◗ Battery time remaining

22

Alarm Button

This pushbutton is used to display current alarms, or to display stored alarms.
If the alarm key is pressed repeatedly, the display will scroll through the stored alarm
record, returning to the latest after the oldest is shown.
If a blinking character (!) appears in the display, the user may press the Alarm
pushbutton again to scroll through additional useful information.

23

Hidden Panel Indicators

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There are 14 led indicators and additional status pushbottons.

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24

A

Emergency Shutdown

This red LED indicates that the emergency power off (EPO) or remote emergency power off (REPO) has been activated. 

25

B

Rectifier / Charger is On

This green LED indicates that the rectifier/battery charger is on.

26

C

Rectifier / Charger Fault

This red LED indicates an alarm condition within the rectifier/battery charger. it indicates the presence of one of the
following fault conditions:
◗ Input circuit breaker Q1 open
◗ Input power protection fuse blown
◗ Rectifier/battery charger over-temperature
◗ Battery charge overcurrent
◗ Battery overvoltage
◗ Rectifier/battery charger control board fault
◗ Power supply board fault

27

D

                                   Main AC input (mains 1) outside tolerance
This orange LED indicates that the main AC input (mains 1) source is outside tolerance (voltage and/or frequency too high or too low).

28

E

Reserved for future use.

29

F

Battery Temperature Outside Tolorence

This orange LED indicates that the ambient temperature of the battery is too high or too low.

30

G

Battery Charging

This orange LED indicates that the battery is being recharged. This LED functions only when the connected battery is of the vented lead-acid type (sealed lead-acid batteries will not activate this signal).

31

H

Inverter Fault

This red LED indicates an alarm condition in the inverter, which may be one or more of the following conditions:
◗ Inverter shutdown due to output voltage out of tolerance
◗ Inverter output protection fuse blown
◗ Inverter leg fault
◗ Inverter output transformer over-temperature
◗ Inverter leg over-temperature
◗ Internal clock fault
◗ Inverter control board fault
◗ Power supply board fault

32

I

Battery Discharged

This orange LED indicates that the battery has reached the end of its autonomy, shutting down the inverter.

33

J

Inverter Desynchronized

This orange LED indicates that the inverter is not synchronized with the bypass AC input (mains 2).

34

K

Transfer Fault

This red LED indicates a transfer fault, which may be one or more of the following conditions:
◗ Inverter output static switch fault
◗ Static switch over-temperature
◗ Static switch power supply fault
◗ Transfer control board fault
◗ Power supply board fault

35

L

Overload

This orange LED indicates an alarm condition resulting from one or more of the following conditions:
◗ Inverter current above rating
◗ Output current above rating
◗ Inverter and/or static switch shutdown due to excessive load current

36

M

Bypass AC input (mains 2) outside tolerance


This orange LED indicates that the bypass AC input (mains 2) voltage and/or frequency are too high or too low.

37

N

Maintenance Position

This orange LED indicates that circuit breakers QF1, Q4S, Q5N, or Q3BP are set to the maintenance position. The UPS is not available for load protection.

38

Test Connector

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(port) This 9-pin connector is reserved for service. It is used to connect the cabinet
to a computer, allowing system calibration, personalization, and computer-aided
diagnostics

39

Clear Fault Log

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Pressing this pushbutton clears the alarms stored in memory, allowing the unit to
restart. Memorized alarms cannot be cleared until the condition causing the alarm
has been corrected

40

Audible Alarm Reset

Q image thumb

Pressing this pushbutton stops the audible alarm. Should a new fault condition at a
higher alarm level occur, the alarm will sound again.

41

Battery Charge Cycle

Button 1

Q image thumb

(pushbutton #1) Pressing this pushbutton begins a battery charging cycle. After the
cycle is complete, the rectifier/battery charger returns to float charge levels on the
battery. The battery charge cycle is not applicable to sealed lead-acid battery installations

42

Return to Float Voltage

Button 2

Q image thumb

pushbutton #2) This pushbutton can be used during a battery charge cycle to force
the rectifier/battery charger back to the float voltage level.

43

LOW LEVEL ALARM
UPS OK !

This message indicates that a problem requiring action has occurred. The load is still supplied by the inverter. The problem is listed in the secondary alarm message (see below), as indicated by the flashing exclamation mark (!). The alarm message may be viewed by pressing the “alarm” pushbutton (!)

44

UPS INPUT FAILURE
LOAD ON BATTERY !

This message indicates that the main AC input (mains 1) has failed or is outside of tolerance, and power to the inverter is being supplied from the UPS battery system. The load is still supplied via the inverter.

45

REMAINING BAT. TIME
__ MN %KW LOAD = __

This message is automatically displayed every five seconds when the UPS is on battery. It alternates with the previous message. The message provides an estimate of the available remaining time on battery, based on the percentage of full rated load being supplied, the type of battery, the battery temperature, and the battery age.

46

UPS LOW BATTERY
SHUTDOWN IMMINENT !

This message indicates that the batteries have reached the “low battery shutdown” warning level. The user must take steps to prepare the load for shutdown (load shedding, file saving and computer shutdown, etc.). This message replaces the previous two messages when the batteries are nearly depleted. When this message
appears, there are only a few minutes of battery back-up time remaining.

47

UPS ALARM
CALL SERVICE !

This indicates that the battery disconnect circuit breaker QF1 has been open or the inverter has stopped and that service is required. The problem is listed in the secondary alarm message (see below), as indicated by the flashing exclamation mark (!). The secondary alarm message may be viewed by pressing the “alarm” pushbutton (!).

48

EMERGENCY SHUTDOWN
REPO ON !

This message indicates that the UPS has been shut down because a remote emergency power off (REPO) pushbutton has been pressed and is still closed.

49

LOAD ON
BYPASS !

This message indicates that the load has been transferred to the bypass AC input (mains 2) source. The load is no longer protected.

50

BYPASS PROBLEM
CHECK FREQUENCY !

This message indicates that the bypass AC input (mains 2) source is out of frequency tolerance. The inverter has switched to free-running mode. Transfer of the load from the inverter output to the bypass AC input source requires an interruption of power to the load.

51

BYPASS PROBLEM
CHECK VOLTAGE !

This message indicates that the bypass AC input (mains 2) source is out of voltage tolerance. The inverter has switched to free-running mode. Transfer of the load from the inverter output to the bypass AC input source requires an interruption of power to the load.

52

INDEPENDENT INVERTER
FREQ. COMMAND ON !

This message indicates that the inverter has been set to free-running mode. The inverter is not synchronized to the bypass AC input (mains 2) power source. Transfer of the load from the inverter output to the bypass AC input source requires an interruption of power to the load.

53

BYPASS TRANSFER
LOCKOUT COMMAND ON !

This message indicates that the UPS has been set not to transfer from the inverter to the bypass AC input (mains 2) source. In the event of an inverter shutdown, the load will be disconnected.

54

BATTERY CABINET
OVERTEMP. !

This message indicates that the ambient temperature of the battery is out of tolerance.

55

UPS INPUT PROBLEM
CHECK FREQUENCY !

This message indicates that the main AC input (mains 1) frequency is out of tolerance. The rectifier/battery charger has shut down and the inverter is operating from its battery source.

56

UPS INPUT PROBLEM
CHECK VOLTAGE !

This message indicates that the main AC input (mains 1) voltage is out of tolerance. the rectifier/battery charger has shut down and the inverter is operating from its battery source.

57

CHARGER SHUTDOWN
COMMAND ON !

This message indicates that the rectifier/battery charger has been instructed to shut down, for example during progressive (stepped) transfer to a motor-generator set.

58

INPUT KVA LIMITED
COMMAND ON !

This message indicates that the rectifier/battery charger has been instructed to limit the power drawn from the main AC input (mains 1) source. This condition occurs, for example, when the load is being supplied by an undersized motor-generator set; the UPS battery source is called upon to make up the difference

59

BATTERY CURRENT
LIMIT COMMAND ON !

This message indicates that the rectifier/battery charger has been instructed to limit the charge current to the battery. Normal charge current to the battery will be supplied when the command is released. This condition occurs, for example, when the load is being supplied by an undersized motor-generator set.

60

QF1 BATTERY BREAKER
OPEN !

This message indicates that the battery circuit breaker QF1 has been opened or has tripped. the load is no longer protected, since battery power is unavailable.

61

LOW BATTERY
. . . !

This message indicates that the inverter has shut down, due to depletion of the batterys' stored energy.

62

CHARGER OFF
. . . !

This message indicates that the rectifier/battery charger has shut down.

63

CHARGER FAULT
CALL SERVICE !

This message indicates that a fault has occurred in the rectifier/battery charger, and that service is required.

64

Q1 UPS INPUT CB
OPEN !

This message indicates that the input isolation circuit breaker is open or has tripped. It must be closed for rectifier/battery charger start-up.

65

INVERTER OVERLOAD
CHECK P.F. AND KW

This message indicates that the inverter is in an overload condition, usually due to excessive real power (kW) being drawn by the load. The flashing “KW” indicates that the operator should check the load real power. The inverter will keep supplying the load for a certain amount of time depending on the overload level.

66

INVERTER FAULT
CALL SERVICE !

This message indicates that a fault has occurred in the inverter, and that service is required.

67

INVERTER SHUTDOWN
OVERLOAD > I MAX!

This message indicates that an overload greater than 1.5 times the full power rating of the inverter has occurred, and that the inverter has shut down.

68

INVERTER SHUTDOWN
THERMAL OVERLOAD A

This message indicates that an overload below 1.5 times the full power rating of the inverter has occurred and that the inverter has shut down. The flashing “A” indicates that the operator should check the load current.

69

I LOAD > IN
CHECK LOAD A

This message indicates that the load power being drawn is greater than the UPS full load rating. The flashing “A” indicates that the operator should check the load current. The inverter or static switch will keep supplying the load for a certain amount of time depending on the overload level.

70

TRANSFER FAULT
CALL SERVICE !

This message indicates that a fault has occurred that affects the transfer of the load between the inverter and the bypass source. Service is required.

71

PH OUT OF TOLERANCE !

This message indicates that there is an out of tolerance condition between the inverter and bypass AC input (mains 2) sources. Transfer of the load between the inverter and bypass AC input will result in an interruption of load power.

72

Q4S BYPASS SWITCH
OPEN !

This message indicates that the circuit breaker Q4S is open. Transfer of the load from the inverter to the bypass source is not possible.

73

Q5N UPS OUTPUT ISOL.
SWITCH OPEN !

This message indicates that the optional UPS isolation circuit breaker Q5N is open. The load is not supplied unless the maintenance bypass circuit breaker Q3BP is closed.

74

Q3BP MAINT. BYPASS
SWITCH CLOSED !

This message indicates that the optional maintenance bypass circuit breaker Q3BP is closed. The system is set to maintenance bypass, and the load is supplied by the bypass AC input source (mains 2).

75

STATIC SWITCH O.L.
EMERGENCY OFF !

This message indicates that the static switch has shut down following an overload condition, disconnecting the load.

76

DISPLAY NUMBER 1
UNAVAILABLE

This message indicates that the alphanumeric display is not operating properly. The status of the UPS is still correctly indicated by the LEDs of the visible panel and the hidden panel, see section 1.5 Single Module Indicators and Controls.

77

HARMONIC FILTER
FUSE FAILED

This message indicates that the fuse(s) protecting the input harmonic filter has opened and that service is required. The status of the UPS is still correctly indicated by the LEDs of the visible panel. Refer to section 1.5 Single Module Indicators and Controls for front and hidden panel indicators and controls.

78