ABB Relion 620 Series - Voltage Protection; Three-Phase Overvoltage Protection PHPTOV

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
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.4.4.11 Technical revision history
Table 570: MNSPTOC Technical revision history
Technical revision Change
B Internal improvement
C Internal improvement
4.5 Voltage protection
4.5.1 Three-phase overvoltage protection PHPTOV
4.5.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase overvoltage protection PHPTOV 3U> 59
4.5.1.2 Function block
Figure 331: Function block
4.5.1.3 Functionality
The three-phase overvoltage protection function PHPTOV is applied on power
system elements, such as generators, transformers, motors and power lines, to
protect the system from excessive voltages that could damage the insulation
and cause insulation breakdown. The three-phase overvoltage function includes a
settable value for the detection of overvoltage either in a single phase, two phases
or three phases.
3
Start value multiples in range of 1.10...5.00.
Protection functions 1MRS757644 H
630 620 series
Technical Manual