9170800990 Rev M
BE1-87G General Information
1-5
Pickup
Graphs of the actual operating characteristics are shown in Section 5,
Testing and Setting
.
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).
Control
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
Sensing Input Range 1
Accuracy
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
>90% of operate characteristic
Dropout
<30 ms at 10 times pickup setting, 70 ms maximum
Timing
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.
Содержание BE1-87G
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Страница 39: ...9170800990 Rev M BE1 87G Installation 4 9 Figure 4 8 Outline Dimensions Rear View Double Ended Mounting Case...
Страница 40: ...4 10 BE1 87G Installation 9170800990 Rev M Figure 4 9 Outline Dimensions Rear View Single Ended Mounting Case...
Страница 41: ...9170800990 Rev M BE1 87G Installation 4 11 Figure 4 10 Outline Dimensions Front View Case Cover...
Страница 46: ...4 16 BE1 87G Installation 9170800990 Rev M Figure 4 15 Typical DC Control Connections...
Страница 47: ...9170800990 Rev M BE1 87G Installation 4 17 Figure 4 16 Single Phase Sensing Connections...
Страница 48: ...4 18 BE1 87G Installation 9170800990 Rev M Figure 4 17 Three Phase Sensing Connections Wye Connected Generator...
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Страница 56: ...5 4 BE1 87G Testing and Setting 9170800990 Rev M Figure 5 3 Operating Characteristics Relay Style x1x xxx xxxxx...
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