Voltage Operating Range; Fail-Safe Bypass Operation - ABB PCS100 UPS-I User Manual

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.
140%
120%
100%
80%
60%
40%
20%
0%
0
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.
Utility Voltage
Utility
PCS100 UPS-I Discharging
PCS100 UPS-I On Line
PCS100 UPS-I Discharging
75%
100%
Load Load
1 2 3
Typical Ride Through Time (seconds)
Figure 2-6: PCS100 UPS-I voltage operating range example
Fail-Safe Bypass
CLOSED
Utility Disconnect
SCRs ON
Energy Storage
Figure 2-7: PCS100 UPS-I energy flow in case of bypass operation
50%
Load
4 5 6
Coupling
PCS100 UPS-I Voltage
Transformer
Inverter
OFF
Batteries
or
Ultracapacitors
Adjustable
Surge Treshold
Adjustable
Sag Treshold
7 8
Load
Output Voltage
Utility Voltage
PCS100 UPS-I Voltage
Legend
Energy Flow