Figure 37 History Log Metering Report Screen - Liebert 30-130kVA Operation And Maintenance Manual

History Logs
The History log contains pertinent data recorded just before and after an event that triggers a signifi-
cant action such as an inverter failure.There are two History logs, each consisting of 64 frames. Each
frame is a sequential snapshot of UPS-generated parameters. The UPS records these frames continu-
ously at 4 millisecond intervals during normal operation. When a fault occurs, the UPS stores 40
frames prior to the triggering event, the frame of the triggering event, and 23 frames immediately fol-
lowing the triggering event.
The frames are numbered -40 +23 with frame 0 designated as the triggering event that initiates the
fault or alarm condition. The Operator can go back 40 frames from the triggering event and forward
23 frames.
There are nine possible triggering events:
• Rectifier fail
• Battery Low Transfer
• Output Overvoltage Transfer
• Output Undervoltage Transfer
• Inverter Fail
• Inverter Overload Transfer
• Heatsink Overtemp Limit
• Outlet Air Overtemp Limit
• Fault Load Transfer to Bypass
The data logged in each frame consists of metering data, machine status information, active faults/
alarms and fault/alarm conditions.

Figure 37 History log metering report screen

OUT-V
(L - N)
A
B
C
The default page is the METERING page, which provides the following data:
• 3 phase Output Volts (L-N)
• 3 phase Output I (amps)
• 3 phase Input volts (L-L)
• 3 phase Input I (amps)
• 3 phase load kVA
• DC Bus Volts, DC I (charge + discharge -)
• Input Frequency and Output Frequency
• Battery Temperature
HISTORY LOG 1 P1 - METERING
OUT IN-V
(I) (L - L) (I) ( KVA) ( KW)
120 10 208
120 10 208
120 10 208
PREV
NEXT
14 : 18: 49 02 / 10 / 00
IN LOAD
52 74 59 540 V
52 74 59 + 65 A
52 74 59 124 C
STATUS ALARMS
36
FREQ
DC
(HZ)
60.0 OUTPUT
60.0 INPUT
EXIT FRAME 0
Operation