5-8
BE1-25A Testing
9146600990 Rev M
NOTE
A stopwatch is recommended for the following steps.
NOTE
Always load in all new bre aker timer setting s, a nd alw ays verify the active breaker by
mom entarily selecting item d from the MCU readings menu. (Breaker settings, unlike other
setting s, m ust be load ed b efore they can take effect.)
Lockout and Reset Verification Test
Step 15. Set the bus input to 120 Vac at 60.00 hertz; the generator input to 120 Vac at 60.04 hertz; the MAX
SLIP setting to 0.25 0 he rtz; the generator 2 breaker time to 0.40 seconds; the GENERATOR
SELECT control to 2; and LOCKOUT ON/OFF (setting 6) to ON.
Step 16.
Sim ulate a breaker trip using a normally-closed pushbutton switch in series with the 52b test jacks.
After the SYNC LED turns ON, depress the 52b pushbutton sw itch and re lease the sw itch within
15 seconds. The LOCKO UT LED should turn ON, and the SYNC LED should quit flashing.
Step 17. Pressing the front panel LOCKO UT RESE T pushbutton switch should clear the lockout and enable
the sync output.
Step 18. Repe at step 16, but depress the switch for a minimum of 17 secon ds. No locko ut should occu r.
Step 19. Set the LOCKOUT (enable) setting to OFF, then repeat step 16. This time the LOCKOUT LED
should not turn ON. Return the LOCKOUT setting to ON.
Advance Angle Verification Test
Step 20. Set the bu s inpu t to 120 Vac at 60.0 hertz; se t the ge nera tor inpu t to 120 Vac at 60.1 hertz.
Step 21.
Connect a counter or an oscilloscope to the front panel SIG/COM jacks. Adjust the counter or scope
to mea sure negative pulse width. Set generator 3 breaker time for a characteristic closing time of
0.800 seconds. Turn the GENERATO R SELECT knob to 3.
Step 22. Short out the 52b jacks to induce a closure cycle. At closure (or sync), the length of the negative
12 V pulse at the SIG/COM jacks should be 800 ±5.0 ms.
Step 23. Repeat step 22 except, while the SIG/COM pulse is still negative, open and immediately close the
52b jacks. This should terminate the sync pulse. Lockout will occur if autom atic lockout (setting 6)
is enabled. The lockout can be canceled by raising the RESET switch.
Step 24. Set the generator 4 breaker time to 0.020 seconds. Turn the GENERATO R SELECT kno b to 4.
Re pea t step 22. T he S IG/C OM pulse width sho uld be 250 ±2 m s (m inimu m p ulse dura tion).
Step 25. A 40°-inh ibit feature preve nts a closure o utpu t for any ad van ce a ngle intern-ally calculated to be
greater than 40°. Arrange a tes t for this as follows. (a) Increase the generator input to 60.2 hertz.
(b) Set generator 5 breaker time to the maximum value — 0.800 seconds. (c) Turn the
GE NER ATO R SE LEC T knob to 5. (d) Set the display to read setting A (AD V AN GLE ).
Step 26. Short the 52b jacks to simulate breaker open. There should be no illumination of the SYNC LED,
and the ADV ANG LE setting should display dashes to indicate that the req uired advance angle is
beyond range.
Step 27. While monitoring the phase difference between generator and bus with a phase angle meter, set
generator 5 breaker time 0.500. Set the display to read ADVance ANGLE and wait 15 seconds. The
SYNC LED should pulse ON/OFF, and the ADVance ANG LE setting should read 36 ±3° at sync.
Step 28. To check that the advance angle is within specified accuracy, use the set up parameters given in
Ta ble 5-1. When running the tests, the phase angle meter should provide the indicated readings
within ±3°. Note that no Breaker Closure output will occur when the parameters are such that the
adva nce a ngle is bey ond 4 0°.
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