Glossary
G — 3
86-504004-00 B03
NFPA
National Fire Protection Association.
NO. or No.
Part number.
On-line mode
Inverter output power is the primary energy source to load.
Off-line mode
Inverter output is off, and the load connected at the inverter output receives power
from utility line via a static transfer switch or maintenance bypass relay.
OSHA
Occupational Safety and Health Agency.
PCA
Printed circuit assembly.
PCB
Printed circuit board.
PWM
Pulse Width Modulation.
SCR
Silicon controlled rectifier.
Shipping damage
Any damage done to an article while it is in transit.
SPDT
Single Pole Double Throw.
Static Transfer
An solid state switching mechanism electronically controlled to pass AC power direct-
ly from the utility to an output load.
Technician
Refers to an electronic technician qualified to maintain and repair electronic equip-
ment. Not necessarily qualified to install electrical wiring.
Test connector
DB-9 type connector on the LCD panel allowing MGE UPS SYSTEMS Customer
Support Service technician to access programmable and diagnostic features of the
system.
V
Volts
VA
Volt amperes
VA
Volt-amps, unit for apparent power measurement, equal V x I.
VAC or Vac
Voltage of AC type.
VDC or Vdc
Voltage of DC type.
ve
Battery voltage.
Via
By way of.
Installation and User Manual
Summary of Contents for STS 400A
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