Basler BE1-50/51B-217, Instruction Manual, Page: 8 / 49

BE1-50/51B-217 General Information
1-3
Load Demand Curve
Scenario
Configure the relay such that when the sensed current is:
1.05 times pickup Time to trip 1.0 hour
1.2 times pickup Time to trip 1.0 hour
1.5 times pickup Time to trip 2.0 minutes
4.0 times pickup Time to trip 0.2 seconds
6.0 times pickup Time to trip 0.2 seconds
Settings
Position the following switches as designated. (Switch locations are shown in Section 2,
Controls And
Indicators.) Figure 1-2 is a graph showing the timing for the application scenario.
SW8-1 Select nominal operating frequency
SW8-2 OFF (open) no instantaneous delay
SW8-3 OFF (open) no instantaneous delay
SW8-4 ON (closed) integrating reset selected
TIME DIAL 4.0
CURVE S
TIME PICKUP Select preferred time pickup level
INST PICKUP Select preferred instantaneous pickup level
SPECIFICATIONS
BE1-50/51B-217 Overcurrent Relay has the following features and capabilities.
Current Sensing Input
Continuous current: 14 amperes. One second current: 400 amperes.
TIME PICKUP Range 0.5 to 15.9 amperes in 0.1 ampere steps. Setting the TIME PICKUP to
the minimum pickup (0.5 ampere), places the relay in the most sensitive
state and may be used as a safety setting.
TIME Dropout Dropout occurs at 95% of pickup value.
TIME PICKUP
Accuracy ±2% ±25 milliamperes at or above 0.5 ampere settings.
Frequency Response
A change of ±5 hertz from the nominal 50/60 hertz current causes less
than 0.5% change in the current required for pickup.
TIME DIAL Range 0.0 to 9.9, in 0.1 steps.
INST PICKUP Range 1 to 99 amperes in 1 ampere steps. Setting the INST PICKUP to the
minimum pickup (1.0), places the relay in the most sensitive state and
may be used as a safety setting.
INST Dropout Dropout occurs at 95% of pickup value.