Three-Phase Overvoltage Protection (Phptov); Three-Phase Overvoltage Protection (Phptov) Main Settings - ABB REF615 Product Manual
Feeder protection and control
Hide thumbs
Also See for REF615:
- Applications manual (404 pages) ,
- Operation manual (126 pages) ,
- Point list manual (64 pages)
Table of Contents
Advertisement
ABB
Feeder Protection and Control
REF615
Product version: 2.0
Table 34. Three-phase overvoltage protection (PHPTOV)
Operation
Depending on the frequency of the voltage measured: f
accuracy
±1.5% of the set value or ±0.002 x U
Start time
1) 2)
U
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Start value = 1.0 x U
, Voltage before fault 0.9 x U
n
frequence 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 = 1.20 x U
Table 35. Three-phase overvoltage protection (PHPTOV) main settings
Parameter
Start value
Time multiplier
Operate delay time
Operating curve type
1)
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
= 1.1 x set Start value
, f
= 50 Hz, overvoltage in one phase-to-phase with nominal
n
n
, Start value multiples in range of 1.10 to 2.00
n
Function
PHPTOV
PHPTOV
PHPTOV
PHPTOV
n
n
Minimum
Typical
22 ms
24 ms
< 40 ms
Depends on the Relative hysteresis
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20
ms
3)
DFT: -50dB at f = n x f
,
n
where n = 2, 3, 4, 5,...
Value (Range)
0.05...1.60 x U
n
0.05...15.00
40...300000 ms
Definite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
1MRS756379 D
±2Hz
Maximum
26 ms
Step
0.01
0.05
10
29
Hide quick links:
Advertisement
Table of Contents
