701 Motor Protection Relay
Date Code 20010719
Metering & Monitoring
Introduction
8.2
Details on each of the meter data types are shown below.
Section 6: ASCII Serial Port Operation
describe how to access the
various types of meter data using the relay front panel and serial ports.
Instantaneous Metering
Table 8.1
Measured Values
The relay displays both the fundamental frequency component and the RMS
values of several measurands. The fundamental frequency signal has a defined
magnitude and phase angle with respect to the other quantities. Reported phase angle is
associated with the fundamental frequency magnitude, referenced to Vab or Ia at
0 degrees. RMS quantities do not have a defined phase angle. Reactive and apparent
powers (kVAR and kVA) are not defined for RMS measurement.
Table 8.1
Measured Values
Relay Option
Meter Values
All Models
Ia, Ib, Ic, In Fundamental Magnitudes
and Phase Angles; RMS Values
Ig Residual Current Fundamental Magnitude and Phase Angle
Negative-Sequence Current (3I2) Magnitude and Phase Angle
Frequency
% Unbalance
With Voltage
Inputs (Relay
Models 0701001
and 0701011)
Vab, Vbc, Vca Fundamental Magnitudes
and Phase Angles; RMS Values
Vg Residual Voltage Fundamental Magnitude and Phase Angle
(wye-connection only)
Negative-Sequence Magnitude and Phase Angle
kW Fundamental and RMS Values
HP, kVAR, kVA, and pf
Summary of Contents for SEL-701
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