SW2 (BYPASS ISOLATOR)
FEED FROM
STANDBY UPS
STATIC SWITCH
R
CB2 (RESERVE INPUT)
N
DC CHOKE
INVERTER
SW1
CAPACITORS
L
(OUTPUT ISOLATOR)
SAFETY
CONTACTOR
S
T
N
INVERTER TRANSFORMER
CB1 (RECTIFIER INPUT)
N
HOT STANDBY CONCEPT:
BATT.
NORMALLY THE PRIMARY UPS WILL CARRY THE LOAD.
THE PRIMARY UPS WILL USE POWER FROM MAINS TO
CHARGE THE BATTERY AND TO POWER THE DC LINK.
THE INVERTER WILL DRAW POWER FROM THE DC LINK
AND SUPPLY CLEAN RE-CREATED VOLTAGE TO THE LOAD.
DURING MAINTENANCE OR FAULT, THE PRIMARY UPS's
STATIC SWITCH WILL PROVIDE A NO BREAK TRANSFER OF
THE LOAD TO THE SECONDARY (STANDBY UPS).
THE SECONDARY UPS WILL ONLY CARRY LOAD WHEN
THE PRIMARY UPS IS OFF OR IN BYPASS - HENCE THE TERM
HOT STANDBY.
TOWER HOT STANDBY
UPSCOM
Unregistered Shareware
Page 1 of 1
OUTPUT TO LOAD
R
FEED FROM
MAINS SUPPLY
RECTIFIER
SW2 (BYPASS ISOLATOR)
STATIC SWITCH
CB2 (RESERVE INPUT)
SW2 (BYPASS ISOLATOR)
STATIC SWITCH
DC CHOKE
INVERTER
SW1
CAPACITORS
R
FEED FROM
MAINS SUPPLY
RECTIFIER
(OUTPUT ISOLATOR)
SAFETY
CONTACTOR
S
CB2 (RESERVE INPUT)
T
CB1 (RECTIFIER INPUT)
INVERTER TRANSFORMER
DC CHOKE
FEED FROM
MAINS SUPPLY
L
(OUTPUT ISOLATOR)
SAFETY
CONTACTOR
S
T
N
CB1 (RECTIFIER INPUT)
INVERTER TRANSFORMER
N
BATT.
Unregistered Shareware
SW1
OUTPUT TO LOAD
BATT.
INVERTER
CAPACITORS
R
N
RECTIFIER