3.33
Date Code 20060320 Instruction Manual SEL-311C Relay
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Time-Overcurrent Elements
Time-Overcurrent Elements
Phase Time-
Overcurrent Elements
One phase time-overcurrent element is available. The element is enabled with
the E51P enable setting as follows:
51PT Element Settings Ranges
The 51PT phase time-overcurrent element has the following settings:
See Section 9: Setting the Relay for additional time-overcurrent element
setting information.
Table 3.8 Available Phase Time-Overcurrent Elements
Time-Overcurrent
Element
Enabled With
Setting
Operating Current
See
Figure
51PT E51P = Y I
ABC
, maximum of
A-, B-, and C-phase currents
Figure 3.24
Table 3.9 Phase Time-Overcurrent Element (Maximum Phase) Settings
Setting Definition Range
51PP pickup OFF, 0.25–16.00 A secondary
(5 A nominal phase current inputs, IA, IB, IC)
OFF, 0.05–3.20 A secondary
(1 A nominal phase current inputs, IA, IB, IC)
51PC curve type U1–U5 (U.S. curves) see Figure 9.1–
Figure 9.10 C1–C5 (I.E.C. curves)
51PTD time dial 0.50–15.00 (U.S. curves)
see Figure 9.1–Figure 9.10
0.05–1.00 (I.E.C. curves)
51PRS electromechanical
reset timing
Y = Enable electromechanical reset timing
N = 1 cycle reset delay
51PTC SEL
OGIC control equation
torque control setting
Relay Word bits referenced in Table 9.5 and
Ta bl e 9. 6
or
set directly to logical 1
a
a
SELOGIC control equation torque control settings (e.g., 51PTC) cannot be set directly to
logical 0.
To Next Page
Loading...
