Adjustments of controls for relay operation – Basler Electric BE1-51 User Manual
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Step 10. Slowly adjust the test set further toward an overcurrent threshold of 40 times the front panel
TAP selector A setting until the instantaneous 1 output relay energizes. Do not disturb this
setting.
RESULT: If target Type A or B is present:
(a) The front panel FUNCTION-INST 1 target (if present) will trip.
(b) The appropriate front panel ELEMENT target A, B, or C (if present) will trip.
Step 11. Record the current reading. Remove input current (the front panel TIMING indicator should
extinguish).
RESULT: The recorded value should be greater than 40 times the front panel TAP selector A
setting for the maximum overcurrent pickup point for the instantaneous 1 overcurrent element.
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.
Step 12. For the neutral sensing, connect the relay as shown in Figures 26 and 27, 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 24 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.
BE1-51
Tests and Adjustments