Siemens 7SR242 - Symbols and Nomenclature

7SR242 Duobias Description Of Operation
©2010 Siemens Protection Devices Limited Chapter 1 Page 5 of 52
c
start
trip
Elem Starter
Elem Inhibit
Elem Reset Delay
c
Forward
Reverse
Elem Char Dir
Non-Dir
L1 Dir Blk
PhaseAFwd
Binary input signal
visible to user
Binary Output visible to user
Digital signal not visible to
user, to/from another element
List of settings associated with a specific
function
Appropriate list is TRUE when setting
selected.
Digital signal not visible to
user, internal to this element
IL1
Analogue signal with signal
description
Common setting for multiple functions
c
start
trip
Function.
Individual functions are enabled when
associated control input (c) is TRUE.
Common control input (c) for multiple
functions. All functions are enabled
when control input is TRUE.
&
And Gate
(2 inputs shown)
≥1
Or Gate
(3 inputs shown)
INST.
EVENT
EVENT: IEC, Modbus or DNP
Where applicable
Relay instrument
1
Exclusive Or (XOR) Gate
(3 inputs shown)
Symbols and Nomenclature
The following notational and formatting conventions are used within the remainder of this document:
• Setting Menu Location MAIN MENU>SUB-MENU
• Setting: Elem name -Setting
• Setting value: value
• Alternatives: [1st] [2nd] [3rd]