18
PCS100 UPS-I
User Manual
2.3.4
Voltage Operating Range
Figure 2-6 shows typical voltage operating range with Ultracapacitor Energy Storage (1.0 Power Factor when
new). For exact autonomy time at different load levels refer to the graph in section 6.1.3 which also includes aging
impact on Ultracapacitor Energy Storage.
0%
20%
40%
60%
80%
100%
120%
140%
0
1
2
3
4
5
6
7
8
PCS100 UPS-I On Line
PCS100 UPS-I Discharging
PCS100 UPS-I Discharging
100%
Load
75%
Load
50%
Load
U
ti
lit
y
V
ol
ta
ge
Typical Ride Through Time (seconds)
Adjustable
Surge Treshold
Adjustable
Sag Treshold
Figure 2
-
6: PCS100 UPS
-
I voltage operating range example
For detailed information on voltage detection and transfer performance refer to section 9.
2.3.5
Fail-Safe Bypass Operation
In an expected or unexpected PCS100 UPS-I shutdown, load current will be transferred to the Fail-Safe Bypass
(where fitted). This provides an additional level of security by placing a mechanical contact in parallel with the
Utility Disconnect.
Legend
Energy Flow
Utility Voltage
PCS100 UPS-I Voltage
Utility Disconnect
SCRs ON
Inverter
OFF
Fail-Safe Bypass
CLOSED
Utility
Load
PCS100 UPS-I Voltage
Utility Voltage
Coupling
Transformer
Output Voltage
Energy Storage
Batteries
or
Ultracapacitors
Figure 2
-
7: PCS100 UPS
-
I energy flow in case of bypass operation