EMR-5000
IM02602012E
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]
Accuracy
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
Disengaging Time
<45 ms
Overcurrent Protection Elements:
51P[x]
Accuracy
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
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
Ground Current Elements:
50X[x] / 50R[x]
Accuracy
*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>
Disengaging Time
<45 ms
t-reset (Reset Mode = t-delay)
±1% or ±10 ms
Ground Current Elements:
51X[x] / 51R[x]
Accuracy
*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
Operating Time
Starting from IE higher than 1.1 x IE>
<35 ms
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
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