Sel 751A - Page 609

J.7
Date Code 20100129 Instruction Manual SEL-751A Relay
Relay Word Bits
Definitions
59P1 Phase Overvoltage Trip 1 Pickup (see Figure 4.19). 10
59P1T Phase Overvoltage Trip 1 Output (see Figure 4.19). 10
59P2 Phase Overvoltage Trip 2 Pickup (see Figure 4.19). 10
59P2T Phase Overvoltage Trip 2 Output (see Figure 4.19). 10
59Q1 Level 1 Negative-Sequence Overvoltage Element Pickup. 114
59Q1T Level 1 Negative-Sequence Overvoltage Element Trip. 114
59Q2 Level 2 Negative-Sequence Overvoltage Element Pickup. 114
59Q2T Level 2 Negative-Sequence Overvoltage Element Trip. 114
59S1 Level 1 VS Channel Overvoltage Element Pickup. 111
59S1T Level 1 VS Channel Over Voltage Element With Time Delay. 111
59S2 Level 2 VS Channel Over Voltage Element Pickup. 111
59S2T Level 2 VS Channel Over Voltage Element With Time Delay. 111
59VP Phase Voltage window element (selected phase voltage [VP] between settings 25VLO and
25VHI).
110
59VS VS Channel Voltage window element (selected phase voltage [VS] between settings 25VLO and
25VHI).
110
79RS Reclosing Relay in Reset State. 26
79CY Reclosing Relay in Reclose Cycle State. 26
79LO Reclosing Relay in Lockout State. 26
81D1T Definite-Time Over- and Underfrequency Element (Trip Level 1). Asserts when the frequency
has been either above or below the element set point for a definite time (see Figure 4.27).
11
81D2T Definite-Time Over- and Underfrequency Element (Trip Level 2). Asserts when the frequency
has been either above or below the element set point for a definite time (see Figure 4.27).
11
81D3T Definite-Time Over- and Underfrequency Element (Trip Level 3). Asserts when the frequency
has been either above or below the element set point for a definite time (see Figure 4.27).
11
81D4T Definite-Time Over- and Underfrequency Element (Trip Level 4). Asserts when the frequency
has been either above or below the element set point for a definite time (see Figure 4.27).
11
81D5T Definite-Time Over- and Underfrequency Element (Trip Level 5). Asserts when the frequency
has been either above or below the element set point for a definite time. (see Figure 4.27).
11
81D6T Definite-Time Over- and Underfrequency Element (Trip Level 6). Asserts when the frequency
has been either above or below the element set point for a definite time. (see Figure 4.27).
11
81R1T Level 1 Rate-of-change of frequency element trip. 115
81R2T Level 2 Rate-of-change of frequency element trip. 115
81R3T Level 3 Rate-of-change of frequency element trip. 115
81R4T Level 4 Rate-of-change of frequency element trip. 115
AFS1DIAG Arc-Flash Sensor input 1 diagnostic failure. 115
AFS2DIAG Arc-Flash Sensor input 2 diagnostic failure. 115
AFS3DIAG Arc-Flash Sensor input 3 diagnostic failure. 115
AFS4DIAG Arc-Flash Sensor input 4 diagnostic failure. 115
AFALARM Arc-Flash system integrity alarm (AFS1EL OR AFS2EL OR AFS3EL OR AFS4EL OR
AFS1DIAG OR AFS2DIAG OR AFS3DIAG OR AFS4DIAG)
110
AFS1EL Arc-Flash Sensor input 1 excessive ambient light pickup for 10 seconds. 116
AFS2EL Arc-Flash Sensor input 2 excessive ambient light pickup for 10 seconds. 116
AFS3EL Arc-Flash Sensor input 3 excessive ambient light pickup for 10 seconds. 116
Table J.2 Relay Word Bit Definitions for the SEL-751A (Sheet 4 of 11)
Bit Definition Row