Seg WI Series User Manual

4 Protective Elements
4.1
»Prot« – General Protection Module
The module “General Protection” (»Prot«) serves as outer frame for all other protection
modules, i. e. a master module that is connected to all protection stages.
De󰃰nition (“Alarm ↔ Trip”) of a Protection Function
It is possible for every protection stage to de󰊟ne during the commissioning setup whether
this stage shall issue a trip signal in case of a fault, so that the circuit breaker gets opened,
or whether the stage shall simply issue an alarm signal, without tripping. This setting
can be done within the menu [Device planning]. This menu branch features a setting
parameter »De󰅰nition« for each protection stage.
• In general, a fault leads to a pickup of the respective protection stage. If the stage is•
not blocked the signal »Pickup« is issued, and this is also (internally) reported to the
master module »Prot«.
The further operation depends on the category of the protection stage:
• »De󰅰nition« = “Alarm” — The protection stage operates as a pure supervision•
function, this means:
◦ A protection pickup does not issue a General Pickup »Prot . Pickup«. Instead,◦
if the fault persists after a settable timer has elapsed (see ╚═▷ Fig. 39), an
alarm signal »Alarm« is issued, which is also (internally) reported to the master
module »Prot«.
◦
The master module »Prot« then issues a General Alarm, this is the signal »Prot .
◦
Alarm«.
If the protection stage is phase-selective then also the respective
signals »Alarm IL1«, »Alarm IL2«, »Alarm IL3« are issued. (These signals,
however, are not reported to the »Prot« module. But just like every signal,
these can be directly viewed within the respective menu branch.)
• »De󰅰nition« = “Trip” — The protection stage operates as a “full” protection•
stage and is able to trip the circuit breaker:
◦ The master module »Prot« then issues a General Pickup. The respective signal◦
is labeled »Prot . Pickup«.
If the pickup comes from a phase current protection stage the additional
signal »Prot . Pickup I Ph« is issued.
If the pickup comes from a ground (earth) current protection stage the
additional signal »Prot . Pickup IG« is issued.
If the pickup comes from a phase-selective protection stage then the faulty
phase(s) can be seen from the additional respective signal(s) »Prot . Pickup
IL1«, »Prot . Pickup IL2«, and/or »Prot . Pickup IL3«.
◦ If the fault persists after a settable timer has elapsed – see also ╚═▷ Fig. 39:◦
A trip signal »Trip« is issued, which is also (internally) reported to the master
module »Prot«.
121WIC1WIC1-1.0-EN-MAN
4 Protective Elements
4.1 »Prot« – General Protection Module

Seg WI Series Specifications

General

Brand	Seg
Model	WI Series
Category	Relays
Language	English