2-18
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
SPECIFICATIONS
CHAPTER 2: PRODUCT DESCRIPTION
2
Dropout level:
pickup – 0.03 Hz
Level accuracy:
±0.001 Hz
Time delay:
0 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
Operate time:
typically 4 cycles at 0.1 Hz/s change
typically 3.5 cycles at 0.3 Hz/s change
typically 3 cycles at 0.5 Hz/s change
Typical times are average operate times including variables such as frequency change instance, test method, and so on, and can vary by
±0.5 cycles.
RATE OF CHANGE OF FREQUENCY
df/dt trend:
increasing, decreasing, bi-directional
df/dt pickup level:
0.10 to 15.00 Hz/s in steps of 0.01
df/dt dropout level:
96% of pickup
df/dt level accuracy:
80 mHz/s or 3.5%, whichever is greater
Overvoltage supv.:
0.100 to 3.000 pu in steps of 0.001
Overcurrent supv.:
0.020 to 30.000 pu in steps of 0.001
Pickup delay:
0 to 65.535 s in steps of 0.001
Reset delay:
0 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
95% settling time for df/dt:
<24 cycles
Operate time:
typically 9.5 cycles at 2
×
pickup
typically 8.5 cycles at 3
×
pickup
typically 6.5 cycles at 5
×
pickup
Typical times are average operate times including variables such as frequency change instance, test method, and so on, and can vary by
±0.5 cycles.
SYNCHROCHECK
Max voltage difference:
0 to 400000 V in steps of 1
Max angle difference:
0 to 100
°
in steps of 1
Max freq. difference:
0.00 to 2.00 Hz in steps of 0.01
Hysteresis for max. freq. diff.:
0.00 to 0.10 Hz in steps of 0.01
Dead source function:
None, LV1 & DV2, DV1 & LV2, DV1 or DV2, DV1 xor DV2, DV1 & DV2 (L = Live, D = Dead)
S-CLS MAX dF:
0.10 to 2.00 Hz in steps of 0.01
S-CLS MIN dF:
0.00 to 1.00 Hz in steps of 0.01
V2 MAG CORR FACTOR:
0.10 to 10.00 in steps of 0.01
V2 ANGLE SHIFT:
-180
°
to +180
°
in steps of 1
°
POWER SWING DETECT
Functions:
Power swing block, out-of-step trip
Characteristic:
Mho or Quad
Measured impedance:
Positive-sequence
Blocking / tripping modes:
2-step or 3-step
Tripping mode:
Early or Delayed
Current supervision:
Pickup level:
0.050 to 30.000 pu in steps of 0.001
Dropout level:
97 to 98% of pickup
Fwd / reverse reach (sec.
Ω
):
0.10 to 500.00
Ω
in steps of 0.01
Left and right blinders (sec.
Ω
):
0.10 to 500.00
Ω
in steps of 0.01
Impedance accuracy:
±5%
Fwd / reverse angle impedances:
40 to 90° in steps of 1
Angle accuracy:
±2°
Characteristic limit angles:
40 to 140° in steps of 1
Timers:
0.000 to 65.535 s in steps of 0.001
Timer accuracy:
±3% of operate time or ±1/4 cycle (whichever is greater)
