1-6
BE1-51 General Information
9137200997 Rev D
Time Delay Accuracy
±
5% of the characteristic curve (Figures A-1 through A-37) for any combination of the front panel
TIME
DIAL
setting and the front panel
TAP/TAP CAL
overcurrent pickup setting.
Repeatability is within
±
2% of setting at 25
°
C.
Output Circuits
Resistive Ratings
120 Vac:
Make, break, and carry 7 Aac continuously
250 Vdc:
Make and carry 30 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
500 Vdc:
Make and carry 15 Adc for 0.2 s, carry 7 Adc continuously, and break 0.3 Adc
Inductive Ratings
120 Vac, 125 Vdc, 250 Vdc:
Break 0.3 A (L/R = 0.04)
Target Indicators
Function targets may be specified as either internally operated or current operated by a minimum of 0.2
amperes through the output trip circuit. When current operated, the output circuit must be limited to 30
amperes for 0.2 seconds, 7 amperes for 2 minutes, and 3 amperes continuously.
Power Supply
Power for the internal circuitry may be derived from a variety of ac or dc external power sources as
indicated in Table 1-1.
Table 1-1. Power Supply Specifications
Input Voltage
Type
Nominal Range
Burden at Nominal
O (mid range)
48 Vdc
24 to 150 Vdc
1.6 W
P (mid range)
125 Vdc
120 Vac
24 to 150 Vdc
90 to 132 Vac
1.9 W
8.9 VA
R (low range)
24 Vdc
12 to 32 Vdc
∗
1.7 W
S (mid range)
48 Vdc
125 Vdc
24 to 150 Vdc
24 to 150 Vdc
1.6 W
1.9 W
T (high range)
250 Vdc
240 Vac
68 to 280 Vdc
90 to 270 Vac
2.1 W
14.2 VA
∗
Type R power supply may require 14 Vdc to begin operation. Once operating, the voltage may be
reduced to 12 Vdc.
Radio Frequency Interference (RFI)
Field-tested using a five-watt, hand-held transceiver operating at random frequencies centered around
144 MHz and 440 MHz, with the antenna located six inches from the relay in both horizontal and vertical
planes.
Isolation
In accordance with IEC 255-5 and ANSI/IEEE C37.90, one-minute dielectric (high potential) tests as
follows:
All circuits to ground:
2,121 Vdc
Input to output circuits:
1,500 Vac or 2,121 Vdc