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Introduction and Specifications
Date Code 20011205
SEL-311B Instruction Manual
Relay Weight:
2U Rack unit: 13 lbs. (5.92 kg)
Type Tests:
Electromagnetic Compatibility Immunity
Electrostatic Discharge: IEC 60255-22-2–1996, Severity Level 4
(8000 V contact, 15,000 V air)
Fast Transient
Disturbance:
IEC 60255-22-4–1992;
IEC 61000-4-4–1995, Severity Level 4
(4000 V on power supply,
2000 V on inputs and outputs)
Radiated Radio
Frequency:
IEC 60255-22-3–1989;
IEEE C37.90.2–1995, 35 V/m
Surge Withstand:
IEEE C37.90.1–1989, 3000 V oscillatory,
5000 V transient
1 MHz Burst
Disturbance:
IEC 60255-22-1–1988, Severity Level 3
(2500 V common and 1000 V differential
mode)
Environmental
Cold:
IEC 60068-2-1–1990, Test Ad; 16 hr.
@
–40°
Dry Heat:
IEC 60068-2-2–1974, Test Bd; 16 hr.
@
+85°
Damp Heat, Cyclic:
IEC 60068-2-30–1980, Test Db; 55°C,
6 cycles, 95% humidity
Object Penetration:
IEC 60529–1989, IP30, IP54
Vibration:
IEC 60255-21-1–1988, Class 1
IEC 60255-21-2–1988, Class 1
IEC 60255-21-3–1993, Class 2
Safety
Impulse:
IEC 60255-5–1977, 0.5 J, 5000 V
Certifications:
ISO:
Relay is designed and manufactured using
ISO 9001 certified quality program.
UL Listed, CSA Certified,
CE Mark.
Processing Specifications
AC Voltage and Current Inputs
16 samples per power system cycle, 3 dB low-pass filter cut-off
frequency of 560 Hz.
Digital Filtering
One cycle cosine after low-pass analog filtering.
Net filtering (analog plus digital) rejects dc and all harmonics greater
than the fundamental.
Protection and Control
Processing
4 times per power system cycle.
Содержание SEL-311B
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