Table 33. Voltage dependent overcurrent protection (PHPVOC) main settings
Parameter Function Value (Range) Step
Start value PHPVOC 0.05...5.00 pu 0.01
Start value low PHPVOC 0.05...1.00 pu 0.01
Start value Mult PHPVOC 0.8...10.0 0.1
Voltage high limit PHPVOC 0.01...1.00 pu 0.01
Voltage low limit PHPVOC 0.01...1.00 pu 0.01
Time multiplier PHPVOC 0.05...15.00 0.01
Operate delay time PHPVOC 0.04...200.00 s 0.01
Operating curve type
1)
PHPVOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
1) For further reference, see the Operation characteristics table
Table 34. Three-phase directional overcurrent protection (DPHxPDOC)
Characteristic
Value
Operation accuracy At the frequency f = f
n
DPHLPDOC
Current:
±1.5% of the set value or ±0.002 × I
n
Voltage:
±1.5% of the set value or ±0.002 × U
n
Phase angle:
±2°
DPHHPDOC Current:
±1.5% of the set value or ±0.002 × I
n
(at currents in the range of 0.1…10
× I
n
)
±5.0% of the set value (at currents in the range of 10…40 × I
n
)
Voltage:
±1.5% of the set value or ±0.002 × U
n
Phase angle:
±2°
Start time
1)2)
I
Fault
= 2.0 × set
Start value
Typically 24 ms (±15 ms)
Reset time <40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics RMS: No suppression
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1)
Measurement mode
= default (depends of stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, fault current in one phase with nominal frequency injected from random phase angle, results based
on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum
Start value
= 2.5 × I
n
,
Start value
multiples in range of 1.5...20
Generator Protection and Control
1MRS757583 C
Product version: 1.3
28 ABB
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