Basler Electric BE1-50/51M - Manual (Page 13)

9252000990 Rev R BE1-50/51M General Information 1-3
Model Numbers
Model number variations in the BE1-50/51M overcurrent relays are specified by a three digit extension to
the model number. Tables 1-1 and 1-2 provide model number, case style, switch SW3-3 selections, and
sensing current input ranges. Internal switches provide for selecting system operating frequencies of 50
or 60 Hz, instantaneous element delays, curve sets, and instantaneous or integrating reset
characteristics. The location and description of these switches is provided in Section 2. Integrating reset is
available in 100 series relays (e.g. - BE1-50/51M-100) when there is adequate input current to power the
relay. Integrating reset is available in 200 series relays (e.g. - BE1-50/51M-200) 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. BE1-50/51M Overcurrent Relays, One Ampere CT Secondary, 50/60 Hz
Model Number Case Style SW3-3 Selects
Sensing Input Range (Amps)
TIME INST
BE1-50/51M-100 C1 (Horizontal Mount) 0.2 Second Delay 0.1 - 3.18 0.2 - 19.8
BE1-50/51M-200 C1 (Horizontal Mount) Curve Set 0.1 - 3.18 0.2 - 19.8
BE1-50/51M-108 C1 (Vertical Mount) 0.2 Second Delay 0.1 - 3.18 0.2 - 19.8
BE1-50/51M-208 C1 (Vertical Mount) Curve Set 0.1 - 3.18 0.2 - 19.8
Table 1-2. BE1-50/51M Overcurrent Relays, Five Ampere CT Secondary, 50/60 Hz
Model Number Case Style SW3-3 Selects
Sensing Input Range (Amps)
TIME INST
BE1-50/51M-104 C1 (Horizontal Mount) 0.2 Second Delay 0.5 - 15.9 1.0 - 99.0
BE1-50/51M-204 C1 (Horizontal Mount) Curve Set 0.5 - 15.9 1.0 - 99.0
BE1-50/51M-109 C1 (Vertical Mount) 0.2 Second Delay 0.5 - 15.9 1.0 - 99.0
BE1-50/51M-209 C1 (Vertical Mount) Curve Set 0.5 - 15.9 1.0 - 99.0
NOTE: 100 series relays (e.g. - BE1-50/51M-104) have the integrating reset function when there is
adequate input current to power the relay. 200 series relays (e.g. - BE1-50/51M-204) have the integrating
reset function even when the input current falls to zero.