ABB 615 Series ANSI, Техническое руководство

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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