9.32
SEL-351A Relay Instruction Manual Date Code 20080213
Setting the Relay
Relay Word Bits (Used in SEL
OGIC Control Equations)
59 27AB2 AB-phase-to-phase instantaneous undervoltage element (AB-phase-to-
phase voltage below pickup setting 27PP2P; see Figure 3.24)
Control
27BC2 BC-phase-to-phase instantaneous undervoltage element (BC-phase-to-
phase voltage below pickup setting 27PP2P; see Figure 3.24)
27CA2 CA-phase-to-phase instantaneous undervoltage element (CA-phase-to-
phase voltage below pickup setting 27PP2P; see Figure 3.24)
59AB2 AB-phase-to-phase instantaneous overvoltage element (AB-phase-to-
phase voltage above pickup setting 59PP2P; see Figure 3.24)
59BC2 BC-phase-to-phase instantaneous overvoltage element (BC-phase-to-
phase voltage above pickup setting 59PP2P; see Figure 3.24)
59CA2 CA-phase-to-phase instantaneous overvoltage element (CA-phase-to-
phase voltage above pickup setting 59PP2P; see Figure 3.24)
59Q2 Negative-sequence instantaneous overvoltage element (negative-sequence
voltage above pickup setting 59Q2P; see Figure 3.25)
3V0
b
3V0 configuration element (asserts when global setting VSCONN = 3V0;
see Figure 9.11)
Indication
60 V1GOOD Positive-sequence overvoltage element (positive-sequence
voltage greater than setting VNOM • 0.75 (wye-connected) or
VNOM • 0.43 (delta-connected); see Figure 4.1)
Testing
*
c
*
c
V0GAIN V0 based on gained data
INMET Channel IN high-gain mode active
(asserts at threshold just below current channel nominal rating)
Event Report
ICMET Channel IC high-gain mode active
(asserts at threshold just below current channel nominal rating)
IBMET Channel IB high-gain mode active
(asserts at threshold just below current channel nominal rating)
IAMET Channel IA high-gain mode active
(asserts at threshold just below current channel nominal rating)
Table 9.6 Relay Word Bit Definitions for SEL-351A (Sheet 15 of 16)
Row Bit Definition Primary Application
Courtesy of NationalSwitchgear.com
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