1.13
Date Code 20170927 Instruction Manual SEL-751 Relay
Introduction and Specifications
Specifications
Specifications
Compliance
Designed and manufactured under an ISO 9001 certified quality
management system
47 CFR 15B, Class A
Note: This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own
expense.
UL Listed to U.S. and Canadian safety standards (File E212775;
NRGU; NRGU7)
Note: UL has not yet developed requirements for products intended to
detect and mitigate an arc flash; consequently, UL has not evaluated
the performance of this feature. While UL is developing these
requirements, it will place no restriction on the use of this product for
arc-flash detection and mitigation. For test results performed by an
independent laboratory and other information on the performance and
verification of this feature, please contact SEL customer service.
UL Certified for Hazardous Locations to U.S. and Canadian standards
(File E470448)
CE Mark
RCM Mark
General
AC Current Input
Phase and Neutral Currents
I
NOM
= 200 mA, 1 A, or 5 A secondary, depending on model.
I
NOM
= 5 A
Continuous Rating: 3 • I
NOM
@ 85°C, linear to 100 A
symmetrical
4 • I
NOM
@ 55°C, linear to 100 A
symmetrical
1-Second Thermal: 500 A
Burden (per phase): <0.1 VA @ 5 A
I
NOM
= 1 A
Continuous Rating: 3 • I
NOM
@ 85°C, linear to 20 A
symmetrical
4 • I
NOM
@ 55°C, linear to 20 A
symmetrical
1-Second Thermal: 100 A
Burden (per phase): <0.01 VA @ 1 A
I
NOM
= 200 mA
Continuous Rating: 4 A, linear to 4 A symmetrical
1-Second Thermal: 20 A
Burden (per phase): <0.01 VA @ 0.2 A
Measurement Category: II
AC Voltage Input
V
NOM
(L-L) Setting Range: 20–250 V (if DELTA_Y:= DELTA)
20–480 V (if DELTA_Y := WYE)
300 Vac Voltage Inputs
Rated Continuous Voltage: 300 Vac
10-Second Thermal: 600 Vac
Burden: <0.1 VA
Input Impedance: 4 M differential (phase-to-phase)
Low-Energy Analog (LEA) Voltage Inputs
Rated Continuous Voltage: 8 Vac (phase-to-neutral)
Nominal LEA Voltage: 0.5–6.8 Vrms (phase-to-neutral)
Input Range: ±12 V
peak
10-second Thermal: 300 Vac (phase-to-neutral)
Burden: <0.1 VA
Input Impedance: 2 M single-ended (phase-to-neutral)
4 M differential (phase-to-phase)
Power Supply
Relay Start-Up Time: Approximately 5–10 seconds (after
power is applied until the ENABLED
LED turns on)
125/250 Vdc or 120/240 Vac
Rated Supply Voltage: 110–240 Vac, 50/60 Hz
110–250 Vdc
Input Voltage Range: 85–264 Vac
85–300 Vdc
Power Consumption: <50 VA (ac)
<25 W (dc)
Interruptions: 50 ms @ 125 Vac/Vdc
100 ms @ 250 Vac/Vdc
24/48 Vdc
Rated Supply Voltage: 24–48 Vdc
Input Voltage Range: 19.2–60.0 Vdc
Power Consumption: <25 W (dc)
Interruptions: 10 ms @ 24 Vdc
50 ms @ 48 Vdc
Fuse Ratings
LV Power Supply Fuse
Rating: 3.15 A
Maximum Rated Voltage: 300 Vdc, 250 Vac
Breaking Capacity: 1500 A at 250 Vac
Type: Time-lag T
HV Power Supply Fuse
Rating: 3.15 A
Maximum Rated Voltage: 300 Vdc, 250 Vac
Breaking Capacity: 1500 A at 250 Vac
Type: Time-lag T
Fuses are not serviceable.
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