Basler Electric BE1-50/51B-241 - Manual (Page 13)

9252000792 Rev D 5
Frequency Response
A change of
±5 Hz from the nominal 50/60 Hz current causes <0.5% change in the current required for
pickup.
Transient Response
<10% overreach with system time constants up to 40 ms.
Harmonic Rejection
Rejection of odd and even harmonics is illustrated in Figure 3.
Figure 3. Harmonic Rejection
Target Indicators
A gravity-latched, manually-reset, current-operated target indicator is provided for the time-overcurrent
(51) trip output and the instantaneous overcurrent A (50-A) trip output. A target indicator is not provided
for the 50-B trip output. The level of trip circuit current required to operate each target is individually
controlled by a circuit board jumper. See the Controls and Indicators chapter for jumper locations and
function assignments
Target Operate Current
Jumper Position—Pins 1 and 2:
Must operate ≥ 2.25 A; must not operate < 900 mA.
*
Jumper Position—Pins 2 and 3: Must operate ≥ 200 mA; must not operate < 80 mA.
*
∗ See Output Contacts for the maximum acceptable levels of trip circuit currents.
Output Contacts
Output contacts are surge protected and rated as follows.
Resistive Ratings
120/240 Vac:
Make 30 amperes for 0.2 seconds, carry 7 amperes for 2
minutes, 3 amperes continuously, and break 5 amperes.
BE1-50/51B-241 General Information