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

Pickup
Graphs of the actual operating characteristics are shown in Section 5, Testing and Setting.
Control
A front panel sensitivity switch permits selection of minimum differential (operate) current. This sensitivity
is constant for restraint currents less than the nominal current (5 Aac for sensing input range 1 or 1 Aac
for sensing input range 2).
Minimum Differential (Operate) Current
Sensing Input Range 1:
0.1, 0.15, 0.2, 0.4, 0.5, 0.8, or 1.6 A
Sensing Input Range 2: 0.02, 0.03, 0.04, 0.08, 0.10, 0.16, or 0.32 A
The ideal operating characteristic is approximated by the following equations∗:
Sensing Input Range 1:
For I
R
≤ 5 A: I
OP
= I
S
For I
R
> 5 A: I
OP
= I
S
+ 0.5 (I
R
− 5)
Sensing Input Range 2: For I
R
≤ 1 A: I
OP
= I
S
For I
R
> 1 A: I
OP
= I
S
+ 0.5 (I
R
− 1)
∗ I
R
is the restraint current, defined as the lesser of the input currents
I
OP
is the operate current
I
S
is the front panel setting
Accuracy
Sensing Input Range 1
For I
R
≤ 4 A: ± 5% of the operate pickup characteristic or ±25 mA, whichever is
greater
For I
R
> 6 A (20 A max.): ± 8% of the operate pickup characteristic or ±150 mA, whichever is
greater
Sensing Input Range 2
For I
R
≤ 0.8 A: ± 5% of the operate pickup characteristic or ±25 mA, whichever is
greater
For I
R
> 1.2 A (4 A max.): ± 8% of the operate pickup characteristic or ±150 mA, whichever is
greater
Dropout
>90% of operate characteristic
Timing
<30 ms at 10 times pickup setting, 70 ms maximum
Operating Power Input
Relay operating power may be obtained from a wide variety of external voltage sources. When ordering,
any one of five internal power supply types may be selected to match the operating power voltage level
available at your site. Available power supply types are listed in Table 1-1.
Table 1-1. Power Supply Types
Type
Input Voltage
Burden at Nominal Nominal Range
K (midrange) 48 Vdc 24 to 150 Vdc 2.75 W
J (midrange) 125 Vdc
120 Vac
24 to 150 Vdc
90 to 132 Vac
2.96 W
7.87 VA
L (low range) 24 Vdc ∗ 12 to 32 Vdc 2.85 W
Y (mid range) 48 Vdc
125 Vdc
24 to 150 Vdc
24 to 150 Vdc
2.75 W
2.96 W
Z (high range) 250 Vdc
230 Vac
68 to 280 Vdc
90 to 270 Vac
3.13 W
9.20 VA
∗ The type L power supply initially requires 14 Vdc to begin operating. Once operating, the
voltage may be reduced to 12 Vdc and operation will continue.
9170800990 Rev N BE1-87G General Information 1-5