Basler Electric BE1-87B - Manual (Page 15)

Current and Voltage Settings
Voltage Alarm Pickup ............................. 10 to 80% in 10% increments
Voltage Pickup ........................................ 50 to 400 V in 50 V increments
Current Pickup ........................................ 0.25 to 2.5 A in 0.25 A increments
Table 1-2 describes input impedance while the SCRs are triggered (low impedance) and while the SCRs
are not triggered (high impedance).
Table 1-2. Input Impedance While Triggered and Not Triggered
Impedance State
Input Impedance in Ohms
60 Hz Nominal 50 Hz Nominal
Low Impedance (SCRs Triggered, Current Circuit Active) 0.05 0.05
High Impedance (SCRs Not Triggered, Voltage Circuit Active)
4000 - j3300
5100
∠ –40°
4500 - j3100
5500
∠ –35°
Frequency
Nominal 50 or 60 Hz, ± 5 Hz
Pickup Accuracy
±5% of the setting over the operating ranges for both current and voltage. Pickup accuracy over the ±5 Hz
nominal frequency variation is within
±8% of the nominal frequency value.
Output Contacts
Output contacts are rated as follows.
Resistive
120/240 Vac ............................................ Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously, break
7 Aac
125/250 Vdc ............................................ Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously, break
0.3 Adc
Inductive
120 Vac, 240 Vac, 125 Vdc, 250 Vdc ..... Break 0.1 A (L/R = 0.04)
Current Rating
Continuous .............................................. 10 A rms
1 second, symmetrical ............................ 160 A rms
5 cycles, symmetrical ............................. 480 A rms
2 cycles, fully offset ................................ 215 A
Voltage Rating
The nature of the BE1-87B relay’s application is that voltage is not applied continuously. For calibration
and test purposes, it may be of value to apply input voltage for a longer duration than the few milliseconds
that would typify an internal or external power system fault. For test and calibration purposes, the BE1-
87B has been designed to withstand 300 Vac for a maximum duration of 60 minutes.
Targets
LED indication (Trip LED) is latched with an internal, mechanical latching relay. Reset is accomplished by
pressing the Reset button on the front panel.
Isolation
In accordance with IEC 255-5 and IEEE C37.90, one-minute dielectric (high potential) tests were
performed as follows.
All circuits to ground ............................... 2000 Vac or 2828 Vdc
Each circuit to all other circuits ............... 2000 Vac or 2828 Vdc.
9282300990 Rev P BE1-87B Application 1-3