EDR-5000
IM02602007E
Protection Elements Accuracy
The tripping delay relates to the time between alarm and trip.
The accuracy of the operating time relates to the time between fault entry and
the time when the protection element is picked-up.
Reference conditions for all Protection Elements: sine wave, at rated frequency, total harmonic distortion < 1%
Overcurrent Protection Elements:
50P[x] / 67P[x]
Accuracy
*2)
Pickup
±1.5% of the setting value or 1% In.
Dropout Ratio
97% or 0.5% In
t
DEFT
±1% or ±10 ms
Operating Time
At testing current >= 2 times pickup value
<35ms
(directional elements: <40ms)
Disengaging Time
<45 ms
Overcurrent Protection Elements:
51P[x] / 67P[x]
Accuracy
*2)
Pickup
±1.5% of the setting value or 1% In.
Dropout Ratio
97% or 0.5% x In
Operating Time
At testing current >= 2 times pickup value
<35 ms
(directional elements: <40ms)
Disengaging Time
<45 ms
t-Multiplier
±5% (according to selected curve)
Reset Mode
±5% (according to selected curve)
t-reset (Reset Mode = t-delay)
±1% or ±10 ms
*2) For directional elements, accuracy of MTA: ±3° at I >20% In.
Ground Current Elements:
50X[x] / 50R[x] / 67X[x] / 67R[x]
Accuracy
*2)
*3)
Pickup (measured ground current)
Pickup (calculated ground current)
±1.5% of the setting value or 1% In
±2.0% of the setting value or 1.5% In
Dropout Ratio
97% or 0.5% In
t
DEFT
±1% or ±10 ms
Operating Time
Starting from IE higher than 1.1 x IE>
<35 ms
(directional elements: <40ms)
Disengaging Time
<45 ms
t-reset (Reset Mode = t-delay)
±1% or ±10 ms
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