Basler BE1-11m - Page 310

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Configuration BE1-11m
BC Sensing:
°−∠⋅= 901VV
ABAN
3
1
°∠⋅= 301VV
ABBN
3
1
°
∠⋅
=
1501
VV
ABCN
3
1
CA Sensing:
°∠⋅=
1501VV
ABAN
3
1
°−∠⋅= 901VV
ABBN
3
1
°
∠⋅
=
301
VV
AB
CN
3
1
Using both the measured and calculated PN voltages, watts and vars are then computed using the
equations listed under four-wire sensing type above.
Motor Configuration Settings
The BE1-11m requires information about the power system to provide metering, fault reporting, and
protective relaying.
Power system settings are configured on the Motor Configuration settings screen in BESTCOMSPlus®. A
summary of the settings appear at the end of this section.
BESTCOMSPlus Navigation Path: Settings Explorer, System Parameters, Motor Configuration
HMI Navigation Path: Settings Explorer, System Parameters, Motor Configuration
Nominal Settings
Frequency
Nominal Frequency can be set for 25-, 50-, 60-, or 100-hertz power systems.
Phase Voltage
The nominal Secondary Phase Voltage setting is used by the 60FL element. The nominal secondary
phase voltage is defined as the secondary phase-neutral voltage for all sensing connections. That is,
even if the user has selected 3-wire, AB, BC, or CA phase-phase sensing connections, the nominal
secondary phase voltage must be set for the phase-neutral equivalent. For example, if a 3-wire open
delta voltage source with a phase-phase voltage rating of 120 volts is connected, the nominal secondary
phase voltage must be set at 120/
3
or 69.3 volts.
Auxiliary Voltage
The nominal secondary auxiliary voltage is defined as the secondary phase-phase or phase-neutral
voltage as determined by the Aux VT Connection setting on the Sensing Transformers screen in
BESTCOMSPlus.
Current
The nominal Secondary Phase Current (I
nom
) setting is used by the 60FL function and DNP3 analog event
reporting functions. I
nom
is also used in the 46 time curve calculation (K factor) of the negative-sequence
current (51-x) element.
I
nom
is the nominal phase current rating for the system corresponding to 1 pu current and is configured in
secondary amps. If 1 pu secondary current is unknown, then setting I
nom
to the secondary CT rating (1 or
5 A) is acceptable for most applications. However, this could degrade the expectation (not accuracy) of
the time curve for the 51-x negative-sequence element as I
nom
is used to directly compute multiple of
pickup (MOP) and time delay.
Power Polarity
This setting defines the polarity of metering and protection functions.
Phase Rotation Setup
Normal phase rotation can be set for either ABC rotation or ACB rotation.