L2275
Emax UL
27/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
11.1
Safety notes
CAUTION: this symbol identifies information on the procedures, actions or circumstances which can lead to wounds or injuries of the
personnel, damage to the unit or economic losses.
Read right through this manual carefully.
This device should only be used by qualified and competent personnel.
In case of any doubts regarding its safe use, the unit must be put out of service, ensuring that it is not used unintentionally.
It must be presumed that safe use is not possible if:
1. the unit shows visible damage.
2. the unit does not work (for example, with the auto-test or by means of the TT1 trip test unit).
3. the unit has undergone damage during transport.
11.1.1 Notes for dielectric strength tests
Dielectric strength tests are not allowed on the inputs and outputs of the trip units and on the VT eventually connected.
11.2
Abbreviations and various notes
11.2.1 Abbreviations
Abbreviation
Meaning
BA
Opening coil
BC
Closing coil
CB
Power circuit breaker (Power circuit breaker. For example, Emax)
CS
Current Sensor (also see CT)
CT
Current Transformer (also see CT)
Emax
ABB SACE Emax Series of air power circuit breakers
HMI
Human Machine Interface
HW
Hardware
In
Current transformer continuous current rating (CT) installed in the power circuit breaker
MT
Thermal memory
Pn
Power circuit breaker nominal power (3 * Vn * In)
Pn
fase
Nominal power of phase (Vn * In)
PR020/K
ABB SACE signaling unit
PR010/T
ABB SACE test unit
PR111/P-A
Protection trip unit for Emax power circuit breaker, UL version
PR112/P-A
Protection trip unit for Emax power circuit breaker, UL version
PR112/PDM-A
Protection trip unit for Emax power circuit breaker, UL version
PR113/P-A
Protection trip unit for Emax power circuit breaker, UL version
PR113/PDM-A
Protection trip unit for Emax power circuit breaker, UL version
PR120/B
ABB SACE power supply unit
Relè
Release Also called “Protection unit” or “Trip unit”
RMS
value
SA
Opening Solenoid
SdZ
Zone selectivity
SRE
Contact protection tripped (Trip unit tripped)
SW
Software
T A
Current transformer (also see CS)
Trip
Action of opening of the power circuit breaker, generated by trip unit
T V
Voltage transformer (also see VS)
U n
Rated voltage of voltage transformers installed (phase voltage)
Vaux
Auxiliary power supply
VS
Voltage Sensor (also see VT)
11.2.2 Various notes
A. For example, use two-wire “Belden” type cable (not supplied by ABB SACE) as described in ABB SACE RU4602.001 drawing.
B. For example, use three-wire “Belden” type cable (not supplied by ABB SACE) as described in ABB SACE RU4602.002 drawing.
C. The unit is fitted with “backup protection” function. Should the first command on the opening solenoid not immediately open the power circuit
breaker (SA partially faulty), TRIP commands are sent repeatedly until the power circuit breaker opens (when Vaux is present) or until
disappearance of the current (if under in self-supply). With Vaux present, in the “backup protection” condition, the “emergency LED flashes
with the “Last Trips” page displayed, and the keyboard is disabled. The “backup” condition can be signaled by configuring the trip unit. By using
the “YO back” selection, it is possible to control the accessory “opening coil (YO)” as a further opening device when the SA does not work.