Schweitzer Engineering Laboratories SEL-701 - Demand Meter Values; Table 8.2; Max;Min Recorded Values

Date Code 20010719 701 Motor Protection Relay
Metering & Monitoring
Introduction
8.3
Demand Metering
Table 8.2 Demand Me ter Values
Using the instantaneous fundamental current and power quantities (optional), the
relay calculates new demand quantities every two seconds. The relay uses a thermal
demand calculation algorithm with a settable time constant. You enter the Demand
Meter Time Constant as a relay setting. The demand algorithm yields an output equal
to 0.9 times the input quantity Demand Meter Time Constant minutes after the signal
was applied, assuming the demand was reset initially. The demand metering function
also records the peak values of each demand quantity.
Max/Min Metering
Table 8.3 Max /Min Recorde d Values
Table 8.2 Demand Meter Values
Relay Option Demand Meter Values
All Models Ia, Ib, Ic, In Fundamental Demand Magnitudes
Ig Residual Current Fundamental Demand Magnitude
Negative-Sequence Current (3I2)
Fundamental Demand Magnitude
With Voltage
Inputs (Relay
Models 0701001
and 0701011)
kW, kVAR, kVA Fundamental Demand Magnitudes
Table 8.3 Max/Min Recorded Values
Relay Option Max/Min Values
All Models Ia, Ib, Ic, In, Ig Fundamental Magnitudes
With RTD
Monitoring (Relay
Models 0701010 and
0701011) or when the
SEL-2600 RTD
Module is connected
Up to 11 or 12 RTD Input Temperatures
With Voltage Inputs
(Relay Models
0701001 and
0701011)
Vab, Vbc, Vca, Vg (wye-connection only)
Fundamental Magnitudes
kW, kVAR, kVA Fundamental Magnitudes