Basler Electric BE1-51/27R - Manual (Page 70)

64 9137200999 Rev F
Figure 39. Typical Instantaneous Response Time
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.
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
Specifications BE1-51/27R