Basler BE1-951 User Manual

9328900990 Rev L BE1-951 Protection and Control 4-49
Operating settings for Over/Under Frequency are summarized in Table 4-29.
Table 4-29. Operating Settings for Over/Under Frequency
Setting Range Increment Unit of Measure Default
Pickup
0 = Disabled
40 to 70
0.01 Hertz 0
0 to 999 milliseconds 1 Milliseconds
0.1 for 0.1 to 9.9 Seconds
0.0 to 600 seconds
1.0 for 10 to 600 Seconds
3 to 36,000 cycles (60 Hz)
Time Delay
2.5 to 30,000 cycles (50 Hz)
∗
Cycles
0
Mode
O = Overfrequency
U = Underfrequency
N/A N/A 0
Inhibit Level
0 = Disabled (functions enabled
for all voltage levels)
15 to 150
0.1 for 15 – 99.9
1.0 for 100 - 150
Secondary Volts † 40
∗ Time delays less than 10 cycles can be entered to the nearest 0.1 cycles from the front panel HMI. All
time delays can be entered to the nearest 0.01 cycles from the ASCII command interface. Time delays
entered in cycles are converted to milliseconds or seconds. Increment precision after conversion is limited
to that appropriate for each of those units of measure.
† Phase-to-phase and phase-to-neutral settings depend on the VTP and VTX connection settings.
The default unit of measure for the Inhibit setting is secondary amps. Primary amps (Pri Amps), per unit
amps (Per U Amps), and percent amps (% Amps) can also be selected as the pickup setting unit of
measure. The unit of measure for the Time setting that represents the element's time delay defaults to
milliseconds. It is also selectable for seconds, minutes, and cycles.
Example 1. Make the following settings to the 81 element and to the Inhibit function. Refer to
Figure 4-40.
Pickup hertz: 59.5
Time: 2 ms
Mode: Under
Inhibit: 100 Vpn secondary volts
BREAKER FAILURE PROTECTION
50BF - Breaker Failure Protection
BE1-951 relays provide one function block for breaker failure protection. This function includes a timer
and a current detector.
Figure 4-41 shows the BF function block. The function block has two outputs
BFPU (breaker failure pickup) and BFT (breaker failure trip).
Figure 4-41. Breaker Failure Logic Block

Basler BE1-951 Specifications

General

Brand	Basler
Model	BE1-951
Category	Surge Protector
Language	English