Characteristic
Value
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
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
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
4.1.2.12
Technical revision history
Table 116:
DPHHPDOC Technical revision history
Technical revision
Change
B
Added a new input
NON_DIR
C
Step value changed from 0.05 to 0.01 for the
Time
multiplier setting.
D
Monitored data VMEM_USED indicating voltage
memory use.
E
Internal improvement.
Table 117:
DPHLPDOC Technical revision history
Technical revision
Change
B
Added a new input
NON_DIR
C
Step value changed from 0.05 to 0.01 for the
Time
multiplier setting.
D
Monitored data VMEM_USED indicating voltage
memory use.
E
Internal improvement.
4.1.3
Three-phase thermal protection for feeders, cables and
distribution transformers T1PTTR
4.1.3.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase thermal protection for
feeders, cables and distribution
transformers
T1PTTR
3Ith>F
49F
Section 4
1MRS757454 D
Protection functions
130
611 series
Technical Manual
Summary of Contents for Relion 611 Series
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