Basler Electric BE1-51 - Manual (Page 56)

50 9137200997 Rev G
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
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)
Power Supply
Power for the internal circuitry may be derived from a variety of ac or dc external power sources as
indicated in Table 4.
Table 4. Power Supply Specifications
Type
Input Voltage
Burden at Nominal
Nominal Range
O (mid-range) 48 Vdc 24 to 150 Vdc 1.6 W
P (mid-range)
125 Vdc
120 Vac 24 to 150 Vdc
90 to 132 Vac 1.9 W
8.9 VA
R (low-range) 24 Vdc 12 to 32 Vdc
*
1.7 W
S (mid-range)
48 Vdc
125 Vdc
24 to 150 Vdc
24 to 150 Vdc 1.6 W
1.9 W
T (high-range)
250 Vdc
240 Vac 68 to 280 Vdc
90 to 270 Vac 2.1 W
14.2 VA
* Type R power supply may require 14 Vdc to begin operation. Once operating, the voltage may be
reduced to 12 Vdc.
Specifications BE1-51