5-8
BE1-51 Tests and Adjustments
9137200997 Rev D
Step 12. For the neutral sensing, connect the relay as shown in Figures 5-3 and 5-4, then repeat Steps 2
through 11, substituting the following:
(a) The front panel
TAP (NEUTRAL)
selector instead of the front panel
TAP
selector (Step 3).
(b) The front panel
INST 1 (NEUTRAL)
control instead of the front panel
INST 1
control
(Step 4).
Step 13. Reconnect the test setup to the INST 2 output terminals (11 and 12) as shown in Figure 5-1,
then repeat Steps 4 through 11, substituting the following:
(a) Front panel
INST 2
control instead of the front panel
INST 1
control (Step 3).
(b) Front panel
FUNCTION-INST 2
target instead of the front panel
INST 1
target (Step 4).
(c) Instantaneous 2 output relay instead of the instantaneous 1 output relay (Step 2).
ADJUSTMENTS OF CONTROLS FOR RELAY OPERATION
The following procedures set up the relay for use in a protective scheme. The procedures are arranged in
a logical sequence that prevents upsetting previous control settings. For relays not having certain options,
skip the corresponding adjustment paragraph. These paragraphs are identified by their headings.
TAP and TAP (NEUTRAL) Selector Setting
Step 1.
Connect the test setup to the relay according to the sensing input type present in the relay as
follows:
(a)
Sensing Input Type K:
Refer to Figure 5-1. Because the relay front panel
TIMING
indicator
provides the needed pickup indication, do not connect the test setup to the output
terminals. The current sense terminals for the desired range (HIGH or LOW), however,
should be connected to the relay.
(b)
Sensing Input Types I or X:
Refer to Figure 5-4. Because the relay front panel
TIMING
indicator provides the needed pickup indication, do not connect the test setup to the output
terminals. The front panel
TAP
selector is ganged and the adjustment of one input phase
automatically aligns the other, thus, only one set of current sense terminals need be
connected. For adjustment of the front panel
TAP (NEUTRAL)
selector, the relay is
reconnected for neutral sensing by this procedure.
(c)
Sensing Input Type G:
Refer to Figure 5-2. Because the relay front panel
TIMING
indicator
provides the needed pickup indication, do not connect the test setup to the output
terminals. The desired range terminals (HIGH or LOW), however, should be connected to
the relay. The front panel
TAP
selector is ganged and the adjustment of one input phase
automatically aligns the others, thus, only one set of current sense terminals need be
connected.
NOTE
For relays having neutral sensing (Sensing Input Types H, I, V, or X) perform
Step 12. For relays with option 1-2 (INST 2 elements), perform Step 13.
Otherwise, the test ends here.
NOTE
Selection of one of the specific overcurrent pickup points provided by the front
panel
TAP
selector (and with the front panel
TAP CAL
control fully CW) will
permit a pickup point within
±
5% of the selector value without having to connect
the relay to a test setup to verify the setting. If present, the front panel
TAP
(NEUTRAL)
selector and the front panel
CAL (NEUTRAL)
control provide this
function for the neutral overcurrent pickup point
However, if the desired pickup point falls between these front panel
TAP
selector
settings, or if the instantaneous overcurrent option 1-1 or 1-2 is present, the relay
should be connected to a test setup for a precise setting, then the following steps
should be performed.