Appendix B: Glossary
Term Definition
AC Alternating current
BCB Battery circuit breaker
CSA Cross sectional area
DC Direct current
EIB External interface board
EMC Electromagnetic compatibility
EMI Electromagnetic interference
EOD End of discharge
EPO Emergency power off
I/O Input/output
IGBT Integrated gate bipolar transistor
LBS Load bus synchronizer
LCD Liquid crystal display
LED Light emitting diode
PC Personal computer
PE Protective earth
RCCB Residual current circuit breaker
RCD Residual current detector
REPO Remote emergency power off
SCR Silicon controlled rectifier
SNMP Simple network monitoring protocol
STS Static transfer switch
SVPWM Space vector pulse width modulation
UPS Uninterruptible power system
VRLA Valve regulated lead-acid
Appendices Proprietary and Confidential ©2023 Vertiv Group Corp. 177
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
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