Technical Data; Additional Security Logic For Differential Protection Stsggio (11); Introduction - ABB Relion 670 Series Technical Reference Manual

Section 5
Differential protection
5.2.7
5.3
5.3.1
164

Technical data

Table 87: HZPDIF (87)technical data
Function
Operate voltage
Reset ratio
Maximum continuous
power
Operate time
Reset time
Critical impulse time
Additional security logic for differential protection
STSGGIO (11)
Function description
Additional security logic for differential
protection

Introduction

Additional security logic for differential protection (STSGGIO , 11) can help the
security of the protection especially when the communication system is in abnormal
status or for example when there is unspecified asymmetry in the communication link.
It helps to reduce the probability for mal-operation of the protection. STSGGIO (11) is
more sensitive than the main protection logic to always release operation for all faults
detected by the differential function. STSGGIO (11) consists of four sub functions:
• Phase-to-phase current variation
• Zero sequence current criterion
• Low voltage criterion
• Low current criterion
Phase-to-phase current variation takes the current samples as input and it calculates the
variation using the sampling value based algorithm. Phase-to-phase current variation
function is major one to fulfill the objectives of the startup element.
Range or value
(20-400) V
I=V/R
>95%
2
V>Pickup /SeriesResistor ≤200 W
10 ms typically at 0 to 10 x V
d
105 ms typically at 10 to 0 x V
2 ms typically at 0 to 10 x V
d
IEC 61850
identification
STSGGIO
1MRK505222-UUS C
Accuracy
± 1.0% of I
n
-
-
-
-
d
-
IEC 60617 ANSI/IEEE C37.2
identification device number
- 11
Technical reference manual