Basler Electric BE1-700 - Manual (Page 191)

SL-62=0,0,0
SL-162=0,0,0
SL-BF=0,0,0
SL-GROUP=1,0,0,/0
SL-43=0
SL-143=0
SL-101=0
SL-VOA=0
SL-VO1=VO11
SL-VO2=50TPT
SL-VO3=51PT
SL-VO4=50TNT+50TQT
SL-VO5=51NT+51QT
SL-VO6=0
SL-VO7=0
SL-VO8=0
SL-VO9=0
SL-VO10=0
SL-VO11=50TPT+50TNT+50TQT+150TPT+150TNT+150TQT+51PT+51NT+51QT+151NT
SL-
VO12=50TPPU+50TNPU+50TQPU+150TPPU+150TNPU+150TQPU+51PPU+51NPU+51QPU+151NPU
SL-VO13=0
SL-VO14=0
SL-VO15=0
700C-OC79-A-BE (OVERCURRENT WITH RECLOSING) LOGIC SCHEME (BE1-
700C)
This logic scheme is intended for feeder breaker applications where non-directional overcurrent protection
is required. Optional automatic reclosing is included and is initiated by a protective overcurrent trip or by
an external contact to initiate reclosing (RI).
A diagram of the logic is shown in Figure 8-3. Figure 8-4 shows a one-line drawing for the 700C-OC79-A-
BE logic scheme. The components of OC with 79 logic are summarized in Tables 8-6 through 8-9. The
logic settings in Table 8-10 include the logic equations that connect the various elements (electronic
wiring) of the overcurrent with reclosing logic protection scheme.
Operation - Protection
Time (51) and instantaneous (50, 150) overcurrent function blocks are included in this logic scheme. The
overcurrent function block outputs are directed through VO11 to provide a protective trip signal at OUT1.
Overcurrent elements intended for this scheme are phase (P), neutral (N) and negative-sequence (Q)
protection. A function block is disabled by setting the pickup point at zero in each setting group.
The 150T function blocks are arranged as high-set instantaneous functions. When a 150T trip occurs, the
recloser is driven to lockout. This scheme also allows the 50TN, 50TQ, 51N, and 51Q function blocks to
be torque controlled by Contact Input IN4.
Operation - Reclosing
Reclosing logic in 700C-OC79-A-BE uses a reclose initiate (RI) scheme where each step in the reclosing
sequence is initiated by a protective trip or external initiate signal via IN3. Setting the first reclose time at
zero in the four setting groups will disable the recloser. Reclosing can also be disabled by using IN2.
Contact Input IN2 is connected to the drive to lockout (DTL) input of the recloser function block. In this
scheme, enabling the recloser after a
Aone-shot@ trip causes the recloser to be in lockout. When the
breaker is manually closed, the relay will time out to a reset condition.
Recloser lockout also occurs if any of the 150TP/N/Q functions trips (typically used for high-set
instantaneous protection). It should be noted that the 150TP/N/Q functions drive both the RI and the DTL
inputs to the recloser function block. The DTL input takes priority over the RI input.
If zone-sequence control of the recloser is desired, a logic expression should be entered for the SP-
79ZONE setting that will advance the recloser shot count when a fault is detected, regardless of whether
9376700990 Rev M BE1-700 Application 8-9