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The protection unit self-supplied current sensors and primary voltages the PR120/V module installed. 2
Page No.1 rd
The PR122/P has been designed work accordance with the international standard:
IEC 60947-2 voltage apparatus.
The unit made using digital microprocessor technology and interfaces with the user means graphic display and keyboard.
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.
The unit's user interface also enables parameter setup and complete the prealarm and alarm management for the protection and watchdog
functions.
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).
1 3. 16.
The unit opens the circuit-breaker which installed means the TC, which takes effect directly the device's mechanical leverism.6
13.
Model 2234 Apparatus Scale
L 2778
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. Circuit-breakers.13.2 cifica tio s
13. Example: the E1B800 with 400 Rating Plug has 800 and 400 A. No. 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.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
