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Circuit-breakers.
The unit opens the circuit-breaker which installed means the TC, which takes effect directly the device'smechanical leverism.1 General
The PR123/DC high-performance self-supplied protection unit with Protection, Measurement, Data storage, Communication (optional),
Self-test, Load control and Zone selectivity functions for the ABB SACE 'Emax' range and 4-pole low-voltage air circuit-breakers.
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.SACE PR123/DC Release Identification
The PR123/DC units available, accordance with the IEC standards, together with the various protections and the various standard and optional
modules, are illustrated the following figure:
Modules available standard optional
PR120/V(1) PR120/LV(1) -
PR120/D-M X
PR120/K X
PR120/DC(2) -
BT030 X
(1) Standard: PR120/V PR120/LV
(2) Slot inside occupied PR120/DC
13.
The protection unit self-supplied primary voltages via the PR120/V-PR120/LV module.
The unit made using digital microprocessor technology and interfaces with the user means graphicdisplay andkeyboard.
13. The unit's
user interface also enables parameter setup and completes the prealarm and alarm management for the protection and watchdog functions.
Model 3447
Apparatus Emax DC
Scale
D 1SDH000635R0002
Page No.1 rd
The PR123/DC has been designed work accordance with the international standard:
IEC 60947-2 Low voltage apparatus.2.2 cifica tio s
13.
The protections available are:
Symbol Protection against
L overload with inverse long time delay
S, short-circuit with adjustable delay
I instantaneous short-circuit
G earth fault with adjustable delay
U phase current unbalance
OT temperature out range
UV undervoltage
OV overvoltage
RP reverse active power
MCR closing short-circuit
The PR123/DC can installed 3-pole CBs 4-pole CBs
