UPS in the Mid-Point Between
Utility & Critical Load
Power Station
work
UPS
Critical Load
Where do we need an UPS ?
Power Station
work
UPS
Critical Load
Alternating Voltage
Alternating Voltage (Current)
or Direct Voltage (Current)
- Computers
- Control Systems
- Safety Systems
Poor Mains Quality
High Mains
Quality
Local Emergency Diesel Generator
Local Power Distribution
Non-Critical Load
- Motors
- Heaters
- General Lighting
Typical Mains Disturbances
3% of failures are related to direct power failures. The rest is mainly due to fluctuations.
TRANSIENT
VOLTAGE
SURGE
NOISE
NOTCHES
VOLTAGE
DISTORTION
MOMENTARY
INTERRUPTION
LONG-TERM
INTERRUPTION
FREQUENCY
VARIATION
SAG
SWELL
UNDER-
VOLTAGE
OVER-
VOLTAGE
INVERTER
RECTIFIER
BATTERY
3 Phase Input Voltage 3x200... 3x690V Frequency 50 or 60 Hz 6-pulse thyristor-controlled Rectifier
Opt.: 12pulse thyr.-contr. Rect. Opt.: oversized for higher charge current or rapid charge
AC UPS Systems
Mains / Netz
AC Input
3 phase
DC Voltage
4 Standard DC Voltages: 110, 125, 220 or 400 VDC
Lead acid Type Nickel Cadmium Type
1- or 3-Phase Output IGBT-PWM-controlled Inverter
Short-circuit proof Inverter Opt.: oversized for Inverter module to interrupt bigger fuses
AC Voltage
Consumers / Load
Online Double Conversion System
AC / DC Converter
Energy Storage
DC / AC Converter
INVERTER
RECTIFIER
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