BE1-50/51B-General Information
1-3
or 60 hertz, instantaneous element delays, curve sets, and instantaneous or integrating reset characteristics.
The locations and description of these switches is provided in Section 2. Integrating reset is available in 100
series relays (i.e. - BE1-50/51B-105) when there is adequate input current to power the relay. Integrating
reset is available in 200 series relays (i.e. - BE1-50/51B-205) even when the input current falls to zero. Two-
hundred series relays also have additional characteristic curves available through curve set selection.
Table 1-1. BE1-50/51B Overcurrent Relays, One Ampere CT Secondary, 50/60 Hertz
Model Number
Case Style
SW8-3
Selects
Sensing Input Range (Amps)
TIME
INST
BE1-50/51B-101*
A1
0.2 Second Delay
0.1 - 3.18
0.2 - 19.8
BE1-50/51B-201*
A1
Curve Set
0.1 - 3.18
0.2 - 19.8
BE1-50/51B-102*
S1 (Projection Mount)
0.2 Second Delay
0.1 - 3.18
0.2 - 19.8
BE1-50/51B-202*
S1 (Projection Mount)
Curve Set
0.1 - 3.18
0.2 - 19.8
BE1-50/51B-103*
S1 (Semi-Flush Mount)
0.2 Second Delay
0.1 - 3.18
0.2 - 19.8
BE1-50/51B-203*
S1 (Semi-Flush Mount)
Curve Set
0.1 - 3.18
0.2 - 19.8
Table 1-2. BE1-50/51B Overcurrent Relays, Five Ampere CT Secondary, 50/60 Hertz
Model Number
Case Style
SW8-3
Selects
Sensing Input Range (Amperes)
TIME
INST
BE1-50/51B-105*
A1
0.2 Second Delay
0.5 - 15.9
1.0 - 99.0
BE1-50/51B-205*
A1
Curve Set
0.5 - 15.9
1.0 - 99.0
BE1-50/51B-106*
S1 (Projection Mount)
0.2 Second Delay
0.5 - 15.9
1.0 - 99.0
BE1-50/51B-206*
S1 (Projection Mount)
Curve Set
0.5 - 15.9
1.0 - 99.0
BE1-50/51B-107*
S1 (Semi-Flush Mount)
0.2 Second Delay
0.5 - 15.9
1.0 - 99.0
BE1-50/51B-207*
S1 (Semi-Flush Mount)
Curve Set
0.5 - 15.9
1.0 - 99.0
NOTE:
*
100 series relays (e.g. - BE1-50/51B-105) have the integrating reset function when there is
adequate input current to power the relay. 200 series relays (e.g. - BE1-50/51B-205) have the
integrating reset function even when the input current falls to zero.
SPECIFICATIONS
BE1-50/51B Overcurrent Relays are available with the following features and capabilities.
Current Sensing Input
(1 Ampere Unit)
Continuous current: 2.8 amperes. One second current: 80 amperes.
(5 Ampere Unit)
Continuous current: 14 amperes. One second current: 400 amperes.
