Figure 55, Equation 8 – Basler Electric BE1-11t User Manual
Page 93
9424200995 Rev H
81
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 55. 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 28
shows which voltage measurements are used by each 51 element for each possible phase VT connection
and 51/27 voltage monitoring mode setting.
Table 28. 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
BE1-11t
Inverse Overcurrent (51) Protection