Output Contact And Opto-Input Tests; Sixteen Fault Data; Out-Of-Step Block (Osb) Logic - ABB REL300 Instruction Manual

The RI1 relay is normally used for the single-pole trip scheme. A Breaker Failure Reclosing
Block (BFRB) feature is available for pilot systems if RB is required for breaker failure
squelch. Refer to section 3.21 for the detailed information.

3.4.15 Output Contact and Opto-Input Tests

A "Push-to-Close" feature is included in order to check all output relay contacts, which include
TRIP, BFI, RI1, RI2, RB, AL1, AL2, GS, Carrier Send, Carrier Stop and all programmable con-
tacts (OC1 to OC8).The relay contact check is supplementary to the self-check because the
Microprocessor self-check routine cannot detect the output hardware. In order to enable the
contact test, jumper (JMP5) on the Microprocessor module must be connected. There are sev-
en opto-inputs for 52a, 52b, Ext. Reset, RCVR-1, RCVR-2, PLT ENA AND SBP. Applying a rat-
ed dc voltage to any opto input(s), the display will show a non-zero code on the TEST mode to
indicate the correspondent input path(s). (See Appendix A, 1.1.1.13 (page A-16), Steps 35 and
36 for detailed procedures.)

3.4.16 Sixteen Fault Data

The REL300 system saves the latest sixteen fault records for all zones. The latest two fault
records can be accessed either via the front panel or via the communication port. Fault records
3 thru 16 can only be accessed via the communication port. On the front panel, the "LAST
FAULT' information is of the last fault, the "PREVIOUS FAULT" information is of the previous
fault. These displays contain target information. When targets are available, the LAST FAULT
LED flashes. It flashes once per second if only the LAST FAULT contains targets. It will flash
twice per second if two or more fault records are contained. These records can be deleted by
applying a rated voltage to the Ext. Reset Terminals (TB5/5 and TB5/6), or through a remote
communication interface. By pressing the Reset pushbutton, the LED will be reset to the Me-
tering mode and the fault information will still be retained.
The activation of fault data storage is controlled by the selection of TRIP/Z2TR/Z2Z3 in the
FDAT function, where:
TRIP ---
Z2TR ---
Z2Z3 ---

3.4.17 Out-of-Step Block (OSB) Logic

The Out-of-Step Blocking (OSB) logic (power swing block supervision) in REL300 is a double
blinder scheme. It contains two blinder units, providing 4 blinder lines. The nature of the logic
(shown in Figure 3-18a, page 3-40) is that the outer blinder 21BO must operate 50ms or more
ahead of the inner blinder 21BI, in order for an OSB condition to be identified. The OSB logic
is also supervised by the medium set (IM) phase overcurrent signal (AND-122 on Figure 3-
18a). The OSB signal is a negated input to the AND-131 (Z1P), AND-147 (Z2P), AND-160
(Z3P), and AND-176 (PLTP) for supervising the 3-phase distance trip. In addition to controlling
the OSB logic, the blinder units also may be used to supervise distance relay tripping. Phase
distance unit tripping cannot take place unless 21BI operates. This prevents operation of the
3φ-unit of the distance relay on load. The OSB signal is also applied to the reclosing logic for
initiating RB.
start to store fault data only if trip action occurs.
start to store fault data if Zone 2 units pick up or any trip action occurs.
start to store fault data if Zone 2 or Zone 3 units pick up or any trip action occurs.
I.L. 40-385.7
3-13