Basler Electric BE1-51/27C - Manual (Page 68)

62 9137200998 Rev E
Time Delay Accuracy
±5% of the characteristic curve for any combination of the front panel TIME DIAL setting and the front
panel TAP/TAP CAL overcurrent pickup setting. Refer to the Time Overcurrent Characteristic Curves
chapter for more information.
Repeatability is within
±2% of setting at 25°C.
General Specifications
Voltage Sensing Inputs
Rated for 160 Vac continuous at 40 to 70 Hz (nominal frequency 50 or 60 Hz) with a maximum burden of
1 VA.
Voltage Sensing Selection Range
Continuously adjustable over the range of 40 to 120 Vac.
Voltage Sensing Accuracy
±2% of pickup setting.
Sensing Input Burden
Less than 0.1 ohms per phase or neutral.
Sensing Input Rating
The maximum continuous rating is 20 A, 1 second current rating is 50X (times) the maximum tap current
selected, or 500 A, whichever is less. For ratings other than those specified by the time curves, the rating
is calculated as follows:
𝐼 =
50 × 𝑡𝑎𝑝 𝑜𝑟 500 𝐴 (𝑤ℎ𝑖𝑐ℎ𝑒𝑣𝑒𝑟 𝑖𝑠 𝑙𝑒𝑠𝑠)
√𝑇
I = Maximum current
T = Time that current flows (in seconds)
Output Circuits
Resistive Ratings
120 Vac ............ Make, break, and carry 7 Aac continuously
250 Vdc ............ Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
500 Vdc ............ Make and carry 15 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
Inductive Ratings
120 Vac, 125 Vdc, 250 Vdc........ Break 0.3 A (L/R = 0.04)
Target Indicators
Function targets may be specified as either internally operated or current operated by a minimum of 0.2
amperes through the output trip circuit. When current operated, the output circuit must be limited to 30
amperes for 0.2 seconds, 7 amperes for 2 minutes, and 3 amperes continuously.
Power Supply
Power for the internal circuitry may be derived from a variety of ac or dc external power sources as
indicated in Table 5.
Specifications BE1-51/27C