Maintenance, Storage – Basler Electric BE1-50/51B-240 User Manual
Page 24
16
9252000790 Rev B
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 equals 0.209 seconds and full reset equals 15.5 seconds if current goes to zero.
In Figure 9:
T
A
= 0.209 seconds (relay was at reset)
T
B
= value A because rewind has not gone to zero T C = value A because rewind has not gone to zero Figure 9. Coordination Timing Diagram Maintenance A BE1-50/51B-240 relay requires no preventative maintenance other than periodic checking of relay Storage This device contains long-life aluminum electrolytic capacitors. For devices that are not in service (spares Installation BE1-50/51B-240
connections to make sure that they are clean and tight. If the relay fails to function properly, contact
Basler Electric Technical Sales Support.
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.