ABB Relion 620 Series, Technical Manual

Page: 326 / 1224

4.1.4.11 Technical data
Table 314: DPH3xPDOC Technical data
Characteristic Value
Operation accuracy
DPH3LPDOC
Depending on the frequency of the current/voltage measured: f
n
±2 Hz
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°
DPH3HPDOC 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 , I
Fault
= 2.0 x set Start
value
Minimum Typical Maximum
38 ms 40 ms 43 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 in-
verse time mode
±5.0% of the theoretical value or ±20 ms
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
Peak-to-Peak + backup: No suppression
1 Measurement mode and Pol quantity = default, current before fault = 0.0 × I
n
, voltage before
fault = 1.0 × U
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
Protection functions 1MRS757644 H
326 620 series
Technical Manual