Information List; Voltage-Balance Supervision; Overview Of Functions; Structure Of The Function - Siemens SIPROTEC 5 Manual

Supervision Functions
8.3 Supervision of the Secondary System
Addr.
_:109
8.3.1.6

Information List

No.
Superv.Grp.#
_:52
_:55
8.3.2

Voltage-Balance Supervision

8.3.2.1

Overview of Functions

In healthy system operation, a certain balance between voltages can be assumed.
The Voltage-balance supervision function detects the following errors:
•
Unbalance of phase-to-phase voltages in the secondary circuit
•
Connection errors during commissioning or short circuits and interruptions in the secondary circuit
The voltage measurement is based on the RMS values of the fundamental component.
8.3.2.2

Structure of the Function

The Voltage-balance supervision function is located in the Power-system data of each 3-phase voltage
measuring point.
[dwstrusy-300913, 2, en_US]
Figure 8-5
8.3.2.3

Function Description

The voltage balance is checked by a magnitude supervision function. This function relates the smallest phase-
to-phase voltage to the largest phase phase-to-phase voltage. Unbalance is detected if
|Vmin| / |Vmax| < Threshold min/max, as long as Vmax > Release threshold
372
Parameter
Superv.Grp.#:Binary
input
Information
Superv.Grp.#:Behavior
Superv.Grp.#:Sig. volt. disturbed
Structure/Embedding of the Function
C Setting Options
1 to 256
Default Setting
1
Data Class Type
(Type)
ENS O
SPS O
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017