Basler Electric BE1-11t - Manual (Page 420)

408 9424200995 Rev H
Setting Value BESTCOMSPlus Screen Description
Circuit 1 Tap 2.00 System Parameters, Transformer
Setup Sets the tap for circuit 1 to
2.00 A secondary
Circuit 2 Tap 2.00 System Parameters, Transformer
Setup Sets the tap for circuit 2 to
2.00 A secondary
Mode Percent
Differential Protection, Current, Phase
Differential (87) Sets the type of operation
protection to traditional
phase current differential
Slope Mode Average Protection, Current, Phase
Differential (87) Sets the element to operate
using average restraint
current
Min. Rest. Pickup
(MOT) 0.10 Protection, Current, Phase
Differential (87) Sets the minimum amount
of operate current required
for a trip to 0.10x tap
Restraint Slope 1
(%) 20 Protection, Current, Phase
Differential (87) Sets the 1 st slope of the
restraint characteristic to
20%
2 nd Slope Pickup
(MOT)
3.00 Protection, Current, Phase
Differential (87) The 2 nd slope is active when
the measured maximum
restraint current is greater
3x tap
Restraint Slope 2
(%) 40 Protection, Current, Phase
Differential (87) Sets the 2 nd slope of the
restraint characteristic to
40%
(Optional)
Unrestrained
Tripping Mode Enabled Protection, Current, Phase
Differential (87) Enables the unrestrained
element
(Optional)
Unrestrained
Tripping Pickup 2 Protection, Current, Phase
Differential (87) Sets the operate current
pickup for unrestrained
tripping to 2x tap
Time Delay (ms) 100 Protection, Current, Phase
Differential (87) Sets the trip time delay to
100 ms
(Optional)
Harmonics Mode Shared Protection, Current, Phase
Differential (87) Sets the harmonic restraint
for shared phase operation
(Optional) 2 nd
Harmonic (%)
12 Protection, Current, Phase,
Differential (87) Sets the second harmonic
restraint threshold to 12%
of the fundamental
(Optional) 5 th
Harmonic (%)
35 Protection , Current, Phase
Differential (87) Sets the fifth harmonic
restraint threshold to 35%
of the fundamental
Step 2: Use BESTCOMSPlus to configure the BESTlogicPlus programmable logic previously shown in
Figure 265.
Step 3: Prepare to monitor the 87R function operation. Operation can be verified by monitoring OUT2
(see Figure 265).
Step 4: To test the Minimum Restrained Pickup setting, connect two balanced three-phase current
sources to the BE1-11t in ABC rotation: 0.5
∠0°, 0.5∠–120°, 0.5∠120° amps to terminals D1
through D6 and 0.5
∠180°, 0.5∠60°, 0.5∠–60° amps to terminals F1 through F6 (0.25x tap).
Phase Current Differential (87) Test BE1-11t