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Model 2234 Apparatus Scale
L 2778
Doc.2.1 rd
The PR122/P has been designed work accordance with the international standard:
IEC 60947-2 voltage apparatus. SACE PR122/P Release Identification
The PR122/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:
m
PR122/P
For all versions o®
Optional modules available
PR120/V MEASURING 0
PR120/D-M COM
PR120/K SIGNALLING
PR120/D-BT WL-COM
BT030
Rc(1)
Note (1): See par. 16.
The unit made using digital microprocessor technology and interfaces with the user means graphic display and keyboard. Circuit-breakers. 2
Page No.
The unit's user interface also enables parameter setup and complete the prealarm and alarm management for the protection and watchdog
functions.1 General
The PR122/P high-performance self-supplied protection unit with Protection, easurem ent, Data storage, unication (optional),
Self-test, Load control and Zone selectivity functions for the ABB SACE 'Emax' range and 4-pole low-voltage air circuit-breakers.
42/158
.
It should noted that the reference current for the PR122/P the (the rated current defined the front Rating Plug) and not the (the
uninterrupted rated current the itself).
The unit opens the circuit-breaker which installed means the TC, which takes effect directly the device's mechanical leverism. Example: the E1B800 with 400 Rating Plug has 800 and 400 A. No.
1 3.2 cifica tio s
13.6
13.13.
The protection unit self-supplied current sensors and primary voltages the PR120/V module installed.
The protections available are:
S bol 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 unbalance
OT temperature out range
M closing short-circuit
The PR122/P can installed 3-pole CBs with and without external neutral, 4-pole CBs
