Bender LINETRAXX PEM575 Series, Manual

Page: 57 / 172

Application/inputs and outputs
57 PEM735_D00084_00_M_XXEN/02.2015
7.5.1 Max/Min values per demand period
The PEM575 records the min and max values of the following measurements for
each demand period
 
three-phase voltages
 
three-phase currents
 
three-phase frequencies
 
three-phase power
 
three-phase power factors
λ
 
Voltage unbalance
 
Current unbalance
 
Total harmonic distortion, voltage (THD
U
)
 
Total harmonic distortion, current (THD
I
)
All recorded measuring values can be accessed via the communications interface.
7.6 Setpoints
The PEM575 features 24 user-programmable control setpoints (registers
6600…6839) which provide extensive control by allowing a user to initiate an ac-
tion in response to a specific condition. The alarm symbol
at the right side of
the LC display is lit if there are any active setpoints.
The first 16 setpoints (1…16) are standard setpoints, the other setpoints (17…24)
are high-speed setpoints .
Typical setpoint applications are alarming, fault location and power quality moni-
toring (PQ monitoring).
Setpoints can be programmed via the
communications interface.
The following setup parameters are provided:
1. Setpoint type: Specifies the monitoring condition (over setpoint or under
setpoint) or is disabled.
2. Setpoint parameters : Specifies the parameters to be monitored;
for standard setpoints all parameters are available, for high-speed setpoints
only the keys 1…14 apply.