EMR-5000
IM02602012E
Undervoltage-blocking Frequency:
Accuracy
*1)
Blocking below 15% Vn
for phase-voltage frequency
Vn: 0.57 * rated Main VT, for Wye connection
Vn: 1.0 * rated Main VT, for Open-Delta connection.
V Block f
±1.5% of the setting value or 1% Vn
Dropout ratio
120% or 0.5% Vn
*1) Accurracy is given for rated frequency fn
±10%.
Rate of Change of Frequency:
df/dt
Accuracy
*1)
Threshold
±0.1 Hz/s
2)
t
±1% or ±10 ms
Operating time
Starting from fn and df/dt > 0.1 Hz/s
At df/dt > 2 times pickup
At df/dt > 5 times pickup
<200 ms
typically <100 ms
typically < 70 ms
Disengaging time
<120 ms
*1) Accurracy is given for rated frequency fn
±10%.
*2) 10% additional tolerance per Hz deviation from nominal frequency fn (e.g. at 45Hz, tolerance is 0.15Hz/s ).
Rate of Change of Frequency:
DF/DT
Accuracy
DF
±20 mHz at fn
DT
±1% or ±10 ms
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