4-4 BE1-50/51B-235/-236
Installation 9252000898
Rev
—
From the reset characteristic curve equation:
1
2
−
=
M
RD
T
R
M equals 0 if current goes to zero. A negative result indicates reset time.
seconds
15.5
1
0
2
7.75
2
−
=
−
×
=
Result: Full trip = 0.209 seconds and full reset = 15.5 seconds if current goes to zero.
In Figure 4-3:
T
A
= 0.209 seconds (relay was at reset)
T
B
= value<T
A
because rewind has not gone to zero
T
C
= value<T
A
because rewind has not gone to zero
Figure 4-3. Coordination Timing Diagram
MAINTENANCE
BE1-50/51B-235 and BE1-50/51B-236 relays require no preventative maintenance other than periodic
checking of relay connections to make sure that they are clean and tight. If the relay fails to function
properly, contact the Technical Sales Support department of Basler Electric.
STORAGE
This device contains long-life aluminum electrolytic capacitors. Life in excess of 20 years may be
expected if the storage temperature does not exceed 40
°
C (104
°
F).
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