Schweitzer Engineering Laboratories SEL-311B, Инструкция по эксплуатации

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3-16 Distance, Overcurrent, Voltage, Date Code 20011205
and Synchronism Check Elements
SEL-311B Instruction Manual
EZ1EXT = N
(Setting)
51Q
0
Z1EXTD
S
R
Q Z1X
M311B040a
51G
M1P
Z1G
M2P
Z2G
3PO
Z1X
0
1
X1
(See and )
1.0
Z1EXTM
5
4
2
1
3
6
4 3
7

From Figure 3.20 From Figure 3.5
‚
From Figure 3.19
†
From Figure 3.8
ƒ
From Figure 3.4
‡
From Figure 5.3
„
From Figure 3.7
Figure 3.11: Zone 1 Extension Logic
Zone Time Delay Elements
The SEL-311B Relay supports two philosophies of zone timing: independent or common timing
(see Figure 3.12). For the independent timing mode, the phase and ground distance elements
drive separate timers for each zone. For the common mode, the phase and ground distance
elements both drive a common timer.
Common Timer Settings: Z1D through Z3D
Independent Phase Timer Settings: Z1PD through Z3PD
Independent Ground Timer Settings: Z1GD through Z3GD
Pickup Ranges: OFF, 0.00–16,000.00 cycles, 0.25-cycle steps
Pickup and dropout accuracy for all timers: ±0.25 cycle and ±0.1% of setting
Select independent zone timing by using relay words M n PT and Z n GT (where n is the protection
zone number) in the appropriate SEL
OGIC
trip equation.
TR = M1P + Z1G + M2PT + Z2GT + 51GT + 51QT
Select common zone timing by using relay words Z n T (where n is the protection zone number) in
the appropriate SEL
OGIC
trip equation.
TR = M1P + Z1G + Z2T + 51GT + 51QT