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The PR123/P high-performance self-supplied protection unit with Protection, easurem ent, Data storage, Com unication (optional), Self
test, Load control and Zone selectivity functions for the ABB SACE 'Emax' range and 4-pole low-voltage air circuit-breakers.
Model 2234 Apparatus Scale
L2778
Doc.
The unit opens the circuit-breaker which installed means the TC, which takes effect directly the device'smechanical leverism.
The protection unit self-supplied current sensors and primary voltages via the PR120/V module. No.
It should noted that the reference current for the PR123/P the (the rated current defined the front RatingPlug) and not the (the
uninterrupted rated current the itself). Circuit-breakers. 2
Page No.
The unit made using digital microprocessor technology and interfaces with the user means graphic display and keyboard.
1 4. The unit's
user interface also enables parameter setup and completes the prealarm and alarm management for the protection and watchdog functions.
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.SACE PR123/P Release Identification
The PR123/P units available, accordance with the IEC standards, together with the various protections and the various standard and optional
modules, are illustrated the following figure:
Note (1): See par.
The protections available are:
S bol Protection against
L overload with inverse long time delay
S, short-circuit with adjustable delay
D directional 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
RV residual voltage
RP reverse active power
UF underfrequency
OF overfrequency
M closing short-circuit
The PR123/P can installed 3-pole CBs with and without external neutral, 4-pole CBs.6
PR123/P PR123/P
Protections
BSD DODOFor all versions ^
Optional modules available
PR120/D-M COM________________________
PR120/K SIGNALLING
PR120/D-BT WL-COM
BT030
Rc(1)
14.
Example: the E1B800 with 400A Rating Plug has 800A and 400A. 16.1 rd
The PR123/P has been designed work accordance with the international standard:
IEC 60947-2 voltage apparatus
