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1MAC050144-MB C
Section 4
Protection functions
615 series ANSI
153
Technical Manual
4.1.3.11
Technical data
Table 134: 67/51P and 67/50P Technical data
4.1.4
Non-directional neutral overcurrent protection 51N/50N and
Non-directional ground fault protection 51G/50G
4.1.4.1
Identification
Characteristic
Value
Pickup accuracy
Depending on the frequency of the current/voltage
measured: f
n
±2Hz
67/51P and 67/50P-1
Current:
±1.5% of the set value or ±0.002 x I
n
Voltage:
±1.5% of the set value or ±0.002 x V
n
Phase angle: ±2°
67/50P-2
Current:
±1.5% of the set value or ±0.002 x I
n
(at currents in the range of 0.1…10 x I
n
)
±5.0% of the set value
(at currents in the range of 10…40 x I
n
)
Voltage:
±1.5% of the set value or ±0.002 x V
n
Phase angle: ±2°
Pickup time
12
1.
Measurement mode
and
Pol quantity
= default, current before fault = 0.0 x I
n
, voltage before fault = 1.0 x V
n
,
f
n
= 60 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
Minimum
Typical
Maximum
I
Fault
= 2.0 x set
Pickup
value
37 ms
40 ms
42 ms
Reset time
< 40 ms
Reset ratio
Typical 0.96
Retardation time
< 35 ms
Trip time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Trip time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3
3. Maximum
Pickup value
= 2.5 x I
n
,
Pickup value
multiples in range of 1.5 to 20
Suppression of harmonics
DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,…
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Non-directional ground-fault protection -
Low stage
EFLPTOC
I0>
51N/G
Non-directional ground-fault protection -
High stage
EFHPTOC
I0>>
50N/G-1/2
Non-directional ground-fault protection -
Instantaneous stage
EFIPTOC
I0>>>
50N/G-3
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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