Basler Electric BE1-50/51B-232 - Manual (Page 34)

4.03
4.03
.31
.75
6.19
(19.1)
(7.9)
(102.4)
(102.4)
(157.2)
10-32 SCREWS
MOUNTING PANEL
.25
(6.4)
A A
5/16-18 STUD
2 PLACES
TERMINAL EXTENSION (TYP.)
FOR DETAILED INSTRUCTIONS.
SEE THE TERMINAL PROJECTION
MOUNTING KIT SUPPLIED.
MOUNTING PANEL
(62.48)
2.195
(55.75)
(49.53)
1.95
2.40
DETAIL A-A
SHOWING THE ADDITION OF WASHERS
OVER THE BOSS TO TIGHTEN THE
RELAY AGAINST THE PANEL.
CASE
PANEL
12-17-99
D2750-25
NOTE: PROJECTION MOUNT USES WASHERS OVER THE BOSSES AS SHOWN IN THIS ILLUSTRATION.
Figure 4-4. Panel Drilling Diagram for S1 Case, Side View, Projection Mounting
FACTORY SETTINGS
Factory settings for the internal switches of SW3 are as follows:
 SW3-1 — OFF (0.0 additional fixed delay for the instantaneous element).
 SW3-2 — OFF (0.0 additional fixed delay for the instantaneous element).
 SW3-3 — ON (General Electric, IAC type characteristic curves).
 SW3-4 — ON (Integrating reset characteristics).
APPLICATION COORDINATION
In a typical application coordination scheme, a BE1-50/51B-232 is being used to provide primary
protection for a radial distribution feeder. An electromechanical overcurrent relay with extremely inverse
timing provides protection for the transformer and bus. To improve coordination with the
electromechanical relay, the BE1 relay with integrating reset characteristic has the time characteristic
4-4 BE1-50/51B-232 Installation 9252000896 Rev B