5-6
BE1-67N Testing
9190700990 Rev F
1. Set the Tap Selector at position A and rotate the Tap Calibration control fully clockwise. Rotate the
Directional and Non-Directional Instantaneous Overcurrent controls fully clockwise. Set the Time Dial
at 00.
2. Adjust the I
O
current source for 0.375 Aac (low range) or 1.125 Aac (high range) and apply this
current to the sensing inputs. Voltage (V
O
= 4.0 Vac) will also need to be applied to the sensing input
of the directional element for this test. The phase angle between current and voltage should be
adjusted so that the Timing indicator lights when the pickup current is applied. Adjust the Tap
Calibration control (if required) so that the Timing indicator is lit. This sets the relay pickup for the
following steps.
3. Connect a counter to monitor the time interval from initiation of the timing condition to the output
contact transition at terminals 11 and 12.
4. Switch the sensing current to 1.875 Aac (low range) or 5.625 Aac (high range). (This is five times the
level set in step 2.) Monitor the time required for the output contact to change state and compare the
time with the appropriate value in Table 5-2.
5. Set the Time Dial at 10 and repeat step 4.
TEST PROCEDURES FOR SENSING INPUT RANGES 3 AND 4
The following paragraphs contain procedures for verifying the operation and timing curves of a BE1-67N
relay with sensing input range of 3 or 4.
Operational Test Procedure
Following a preliminary test setup, BE1-67N operational testing consists of a time overcurrent pickup test,
an instantaneous overcurrent pickup test (directional and non-directional), V
O
directional verification, and
I
O
directional verification.
Preliminary Test Setup
1. Connect the BE1-67N relay as shown in Figure 5-1.
2. Adjust the Tap Calibration control fully clockwise.
3. Set the Time Dial at 99.
4. Set the Tap Selector switch in position A.
5. Adjust the Directional, Instantaneous Overcurrent control and Non-Directional, Instantaneous
Overcurrent control fully clockwise.
6. Place the Characteristic Angle switch in the 0
°
position.
7. Set the Polarizing Source Select switch (locator A of Figure 2-2) for dual polarization (both the V
O
and
I
O
switches up).
8. Apply the proper power supply voltage to relay case terminals 3 and 4. (Refer to Section 1,
General
Information
for the voltage range for each power supply type.)
9. Insert the relay connection plugs.
10. Verify that the Power, Directional Timing Inhibit, and Directional Instantaneous Inhibit indicators are
lit.
11. Verify that the Relay Failure output contacts at case terminals 19 and 20 function properly. The
contacts should be open with relay operating power applied and closed with relay operating power
removed. When the upper connection plus is removed, the case shorting bar should place a short
circuit across terminals 19 and 20.
NOTE
The test procedures provided here for time overcurrent pickup, non-directional
instantaneous overcurrent pickup, and directional instantaneous overcurrent
pickup are performed using only voltage polarizing (V
O
) inputs.
Summary of Contents for BE1-67N
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