ABB PCS100 UPS-I - Page 88

88 PCS100 UPS-I User Manual
Factory
Setting:
110%
Note:
If the input RMS voltage raises above the value of this parameter the PCS100 UPS-I will
transfer to backup storage. Response time is about one half cycle i.e. 10 ms for a 50 Hz
supply or 6.2 ms for 60 Hz
Setting up:
Set to the highest supply variation that the load can withstand. If adjusted too fine the
PCS100 UPS-I will switch to the energy storage unnecessarily and there will be less storage
available during critical surges.
Parameter:
533 Frequency Limit
Function:
Specifies the acceptable frequency limits for the utility supply
Access:
Operator
Range:
0 to 100%
Units:
% (base = Parameter 122 Utility Frequency).
Factory
Setting:
+/-5%
Note
Frequency detection typically is only used on generator supplies where the frequency can
vary widely. The default threshold setting is such that the detection will not be triggered
when connected to a grid.
Parameter:
534 Transient Value
Function:
Displays the present level of instantaneous voltage
Access:
Tech (Read-only)
Range:
+/- 100%
Units:
% (base = Parameter 121 Utility Voltage (instantaneous))
Note:
Updates when entering the menu.
Parameter:
535 Transient Threshold
Function:
Sets the maximum instantaneous voltage error threshold beyond which the PCS100 UPS-I
will switch the load from the utility to the energy storage (fast response)
Access:
Operator
Range:
0 to 200
Units:
% (base = Parameter 121 Utility Voltage (instantaneous))
Factory
Setting:
20%
Note:
This is an instantaneous voltage error detection designed to detect sub cyclic (or
transient) errors in the supply voltage. It provides a more rapid response but more coarse
detection than the RMS detection. The response time is about 1.1 ms.
Transient
Threshold
Setpoint
voltage vector
Magnitude error
Setting up:
20% is an average setting. 30% may be required in the presence of notching or other high
order harmonics. Refer to document 2UCD120000E014.