1-4
BE1-50/51B-General Information
TIME PICKUP Range
Setting the TIME PICKUP to the minimum pickup (0.1 on the 1 ampere unit
and 0.5 on the 5 ampere unit), places the relay in the most sensitive state
and may be used as a safety setting.
(1 Ampere Unit)
0.1 to 3.18 amperes in 0.02 ampere steps.
(5 Ampere Unit)
0.5 to 15.9 amperes in 0.1 ampere steps.
TIME Dropout
Dropout occurs at 95% of pickup value.
TIME PICKUP
Accuracy
(1 Ampere Unit)
±2% ±5 milliamperes at or above 0.1 ampere settings.
(5 Ampere Unit)
±2% ±25 milliamperes at or above 0.5 ampere settings.
Frequency Response
A change of ±5 hertz from the nominal 50/60 hertz current causes less
than 0.5% change in the current required for pickup.
TIME DIAL Range
(1 Ampere Unit)
0.0 to 9.9, in 0.1 steps.
(5 Ampere Unit)
0.0 to 9.9, in 0.1 steps.
INST PICKUP Range
Setting the INST PICKUP to the minimum pickup (0.2 on the 1 ampere unit
and 1.0 on the 5 ampere unit), places the relay in the most sensitive state
and may be used as a safety setting.
(1 Ampere Unit)
0.2 to 19.8 amperes in 0.2 ampere steps.
(5 Ampere Unit)
1 to 99 amperes in 1 ampere steps.
INST Dropout
Dropout occurs at 95% of pickup value.
INST PICKUP
Accuracy
(1 Ampere Unit)
±2% ±5 milliamperes at or above 0.2 ampere settings.
(5 Ampere Unit)
±2% ±25 milliamperes at or above 1.0 ampere settings.
Frequency Response
A change of ±5 hertz from the nominal 50/60 hertz current causes less
than 0.5% change in the current required for pickup.
INST Transient Response
Less than 10% overreach with system time constants up to 40 milliseconds
Burden
Burden is non-linear. (Figure 1-2 illustrates the device burden.)
(1 Ampere Unit)
At 0.1 amperes, Z = 120 ohms. At 1.0 ampere, Z = 5 ohms.
(5 Ampere Unit)
At 0.5 amperes, Z = 4.8 ohms. At 5.0 amperes, Z = 0.2 ohms.
Содержание BE1-50B
Страница 5: ...iv BE1 50 51B Introduction Periodic Test 5 9...
Страница 39: ...BE1 50 51B Installation 4 3 Figure 4 3 Panel Drilling Diagram S1 Case Semi Flush Mount...
Страница 43: ...BE1 50 51B Installation 4 7 Figure 4 8 DC Control Connections And Jumper Configuration Terminals...
Страница 44: ...4 8 BE1 50 51B Installation Figure 4 9 BE1 50 51B Overcurrent Relay Rear View...
Страница 59: ...8 2 BE1 50 51B Relay Differences Figure 8 1 Location of Controls and Indicators 100 Series Relays...