Figure 63, Equation 8 – Basler Electric BE1-11g User Manual
Page 111
9424200994 Rev N
99
π΄ππ‘π’ππ πππππ’π πΏππ£ππ =
ππππ πππ ππππ‘πππ πΏππ£ππ
π ππ π‘πππππ‘ πππππ’π πππ‘π‘πππ Γ 51 πβππ π πππππ’π πππ‘π‘πππ
Equation 8. Restraint Pickup Level
Figure 63. 51 Phase Pickup Level Compensation
Phase VT Configuration
The 51/27R function can be set to monitor either Vpp or Vpn depending upon the Phase VT Connection
settings. See the
chapter for details on how to set the phase VT connections. Table 34
shows which voltage measurements are used by each 51 element for each possible phase VT connection
and 51/27 voltage monitoring mode setting.
Table 34. Phase VT Connection Cross Reference
Phase VT Connection
51/27 Mode
51A
51B
51C
4W
Vpp
Vab
Vbc
Vca
4W
Vpn
Van
Vbn
Vcn
3W
Vpp
Vab
Vbc
Vca
AN
Vpn
Van
n/a
n/a
BN
Vpn
n/a
Vbn
n/a
CN
Vpn
n/a
n/a
Vcn
AB
Vpp
Vab
n/a
n/a
BC
Vpp
n/a
Vbc
n/a
CA
Vpp
n/a
n/a
Vca
Note
For single-phase sensing, the unmonitored phase is not restrained or
controlled. These phases are marked in the table by n/a (not
applicable).
BE1-11g
Inverse Overcurrent (51) Protection