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With
the optional PR120/V module, the UV, OV, voltage protections always work the basis the true rms value the voltages.
13.6.8 atchdog
The PR122/P unit provides some watchdog functions able guarantee the proper management relay malfunctions.Protection against instantaneous short-circuit'T';
4.
- Currents: three phases (L1, L2, L3), neutral (N), earth fault.
With the optional PR120/V module, the PR122/P unit also has the following protection functions:
9.
13. Protection against undervoltage "UV";
10. Protection against phase unbalance ''U";
8. the latter case, under self-powering for 3-phase currents
>300A ca. enabled, the event the sensors being disconnected Rating Plug error, opening command
is given the being enabled.2.
- The protection records the historical data the maximum and minimum phase-to-phase voltage, total maximum and mean active power
and total maximum and mean reactive power. No.
- Maintenance: number operations, percentage contact wear, opening data storage (latest trips and events).
N.1 Calculating the RMS
All the protection functions their respective processing the basis the real rms value the currents and voltages (the protection disabled
for current values greater than 8In [where I4> 0.
The signal can combined with relay the PR120/K module with those the PR021/K unit.2.
- Power factor.1 has been exceeded with warning message and the "warning" LED lighting (remember
that the IEC 60947-2 standard annex "F" establishes that the protection unit must function regularly with peakfactor 2. enabled, any anomalies are indicated special alarm message andthe "alarm"
LED coming on; the PR120/D-M module installed, this activates the coil opening command (YO), thus opening the CB.
The display shows histograms with the currents the three phases and the neutral the main page.2.
The signal can combined with relay the PR120/K module with those the PR021/K unit.4 ircuit-breaker state
If auxiliary supply used, powered from the optional PR120/V, the PR122/P unit records the state the circuit-breaker means of
specific wiring the circuit-breaker.
- Instantaneous current values over given tim interval (data logger).2.
□ atchdog for proper connection the Trip Coil (TC).8In] and greater than 4In [where I4<0. the case where the presence current determined with the circuit-breaker the "OPEN" state, state
error signaled warning message being displayed (see par.
13.6) and the "warning" LED lighting up.8In], greater than 6In [where 0. When the circuit-breaker opens, the page with the "Trip" data displayed
(when Test" pressed, automatically the presence Vaux).
- The protection records the historical data the maximum current read.
Model L2234 Apparatus Scale
L 2778
Doc. 13.3 arm onic distortion
The PR122/P unit signals that peak factor 2.2.2.6. Protection against reverse active power "RP";
13. enabled, any anomalies are indicated special alarm messagean
the "alarm" LED coming on, and the circuit-breaker opens after 1s.
- Power: active, reactive, apparent.
The PR122/P unit allows current signal processing the neutral pole with different relationships relative the value the phases. Underfrequency "UF";
14. Protection against instantaneous short-circuit high currents "Iinst";
7.2.
13. Protection against residual voltage "RV";
12. These functions are as
follows:
□ atchdog for presence Auxiliary power supply with "plug" icon displayed.2 ains frequency
The PR122/P unit constantly measures the frequency the mains voltages connected to, only when PR120/V module installed.
- Frequency and peak factor.5In]).
□ atchdog for proper connection the current sensors (CS).
If the frequency goes out the permitted range ±10% relation the rated frequency selected (50 Hz), the "warning" LED comes
on and the warning message displayed (see par.: Beyond 15. Where applicable, the earth fault current displayed separate page. The tolerance for the ammeter measuring
chain (current sensor plus relay) described paragraph 13.6.3@2In), the tolerance for the calculation the true rms value will increase. 13. Overfrequency "OF".12. Protection against earth fault with adjustable delay ''G";
6.6.2.
□ atchdog for protection Trip.7 easurem ent nctions
The current measuring (ammeter) function available all versions the SACE PR122/P unit.
- Instantaneous voltage values over given tim interval (data logger).
The ammeter functions both self-supply mode and with auxiliary power supply.6.3).5In< I4<0.
13.
When the optional PR120/V connected, the following additional measurement functions are provided:
- Voltage: phase-phase, phase-neutral, residual voltage.
The signal can combined with relay the PR120/K module with those the PR021/K unit.
- Energy: active, reactive, apparent.1, 2xIn).
If the waveform has deformation beyond the declared limit (6. 2
Page No.
- Maintenance: number operations, percentage contact wear, opening data storage.5xIn current the Ne, the protection considered being set 100%.
□ Rating PLUG validity. Protection against overvoltage "OV";
11.
13.9.B. Protection against overtemperature ''OT". when the PR120/V odule powered, the ammeter and backlighting are always active. Protection against closing short-circuit "MCR";
5.
44/158
.
A timing indication (message "alarm" LED) provided the unit's display, which activated during protection alarm. disabled when
the alarm condition ceases when the protection has been tripped. addition, the current the phase
under the greatest load given numerical form
