Basler Electric BE1-51/27R - Manual (Page 69)

9137200999 Rev F 63
Specifications
BE1-51/27R Time Overcurrent Relays electrical and physical specifications are described below.
Operational Specifications
Time Overcurrent Pickup Selection Range
Continuously adjustable over the current sensing input ranges specified in the style chart.
Time Overcurrent Pickup Accuracy
Voltages
≥ Nominal
±5% of front panel tap selector setting with TAP CAL control fully CW or ±7% of minimum tap, whichever
is greater.
Voltages < Nominal
±10% of calculated pickup value or ±7% of the minimum tap, whichever is greater.
To find the effective multiple of pickup current use the formula:
V
V
I
I
M
N
t
× =
Where: M = Multiple of tap value current
I = Applied current level
I
T
= Tap value
V
N
= Nominal voltage
V = Applied voltage level
Time Overcurrent Dropout Ratio
Better than 92% of pickup level.
Instantaneous Overcurrent Pickup Range
Continuously adjustable over the range of 1 to 40 times the time overcurrent pickup setting.
Instantaneous Overcurrent Measuring Accuracy
±2% of pickup setting.
Instantaneous Overcurrent Dropout Ratio
Better than 98% of pickup level.
Instantaneous Response
Figure 39 shows the typical response for the instantaneous pickup element.
BE1-51/27R Specifications