Page 152 - Power Quality in Electrical Systems

134 Chapter Nine

Commercial equipment
The following are examples of commercial UPS equipment in order of
power ratings:
■ Rating, 1000 to 2200 VA (Figure 9.3)
■ Delta battery-inverter
■ 120- and 240-V single-phase models
■ AVR, automatic voltage regulator, topology, voltage compensation
(See Chapter 10)
■ Hot swappable batteries
■ Rating, 3 to 10 kVA (Figure 9.4) [9.5]
■ Battery-inverter
■ Double-conversion (online rectifier-inverter)
■ Various input and output voltages, three-phase
■ Monitor and control via the Web browser
■ Rating, 120 kVA (Figure 9.5) [9.6]
■ Battery-inverter
■ 480 V, three-phase
■ Run-time: full load, 8 minutes; half load, 22 minutes
■ Interphase port, DB-25, RS-232
■ Rating, 1000 kVA, (Figure 9.6) [9.6]
■ Battery inverter
■ 480 V, three-phase
■ Configurable for N 1 internal redundancy

The slim 2U shape and advanced networking and remote
control options make this UPS the perfect choice for
networking or process control racks. The S3K2U series
UPS’s protect against most severe power disturbances
including over/under voltages through state of art sinewave,
S3k2u
line-interactive technology. Utility power is continually
protected by the S3K2U series while internal battery power
is maintained for deep sag conditions.
The built-in protection for under and over voltage conditions
of the S3K2U units includes low-energy lightning surge
protection on the input power source. They are provided with
an input circuit protector and a pair of surge protected data
line connectors (RJ-45).
The S3K2U series include an automatic bi-weekly test
function to ensure the capability of the battery to supply power
in deep sag situations. Should the battery fail this test, the
UPS will display a warning to indicate that the battery needs
to be replaced.
Figure 9.3 Delta line-interactive UPS, 1000VA to 2200 VA.
[Courtesy Sola/Hevi-Duty]