Basler Electric BE1-50/51B-121 - Manual (Page 14)

1-2 BE1-50/51B-214/-215/-223/-225 General Information 9252000994 Rev P
Internal switches provide for selecting system operating frequencies of 50 or 60 Hz, instantaneous
element delays of 0.0 or 0.1 second, characteristic curve group selection for either GE IAC or ABB type
curves, and instantaneous or integrating reset characteristics. Switch location and description is provided
in Section 2.
Advantages
BE1-50/51B-214/-215/-223/-225 overcurrent relays have many advantages over other overcurrent relays.
The primary advantages are:
• Time characteristics are defined by equations and graphs
• Field selectable time characteristics
• Very low burden extends the linear range of the CTs
• Self powered from the sensed current
• Continuous automatic calibration
BE1-50/51B-214/-215/-223/-225 overcurrent relays may be tested without removing the relay from the
case. Shorting contacts are provided for all current inputs when the connection plugs or relay chassis is
removed from the relay case.
Specifications
BE1-50/51B-214/-215/-223/-225 overcurrent relays have the following features and capabilities.
Current Sensing Input
BE1-50/51B-214/-215/-223
Continuous Current.................... 14 Aac
One Second Rating ................... 400 Aac
BE1-50/51B-225
Continuous Current.................... 2.8 Aac
One Second Rating ................... 80 Aac
Time Overcurrent (51) Element
Setting the TIME PICKUP control at the minimum pickup setting places the relay in the most sensitive
state and may be used as a safety setting.
BE1-50/51B-214/-215/-223 Pickup
Setting Range ............................ 0.5 to 15.9 Aac
Setting Increment ....................... 0.1 Aac
Accuracy .................................... ±2%, ±25 milliamperes at or above 0.5 ampere setting
BE1-50/51B-225 Pickup
Setting Range ............................ 0.1 to 3.18 Aac
Setting Increment ....................... 0.02 Aac
Accuracy .................................... ±2%, ±5 milliamperes at or above 0.1 ampere setting
Dropout
Dropout occurs at 95% of pickup value.
Timing Range
0.0 to 9.9 seconds in 0.1 second steps.
Timing Accuracy
The timing accuracy is the sum of ±1 cycle, ±2%. This accuracy applies to the range of 1.3 to 40 times tap
and is for a given measured multiple of tap. The measurement of the multiple of tap has an accuracy that
is the sum of ±2%, ±25 milliamperes for the BE1-50/51B-214/-215/-223 and ±2%, ±5 milliamperes for the
BE1-50/51B-225.