Basler Electric BE1-51/27R - Manual (Page 57)

9137200999 Rev F 51
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
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.
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 M or N: Refer to Figure 29. 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 Type Y or Z: Refer to Figure 34. 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 Types B, C, R, or S: Refer to Figures 30 and 32. 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.
(d) Sensing Input Types E, F, U, or W: Refer to Figures 31 and 33. 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 others, 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.
Note
For three-phase relays, ensure that the test signals are connected to
both the current and voltage terminals for the same phase.
BE1-51/27R Tests and Adjustments