Basler Electric BE1-50/51B-241 - Manual (Page 24)

16 9252000792 Rev D
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 9:
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 9. Coordination Timing Diagram
Maintenance
A BE1-50/51B-241 relay requires no preventive 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
Basler Electric Technical Sales Support.
Storage
This device contains long-life aluminum electrolytic capacitors. For devices that are not in service (spares
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.
Installation BE1-50/51B-241