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NOVATEK-ELECTRO
RNPP
-302
curtain time defined by user (parameter
)
– then the RNPP-302 will turn OFF the power load:
terminals 23, 24 will open while 22, 24 and 20, 21 will close.
After the recovery of the voltage parameters
– when controlled voltage becomes 5-6 V lower than maximal
tripping threshold (voltage hysteresis is 5-6 V) the relay will automatically turn ON the power load with delay
time defined by
parameter.
4.2.4. Over/Under voltage monitoring (min/max) mode
(
=3)
If the RNPP-302 was initially in turned OFF state then in case the correct voltage is applied to the device it
will automatically turn ON within the delay time defined by
parameter: the “
REL
” LED will light up and
terminals 23, 24 will open while 22, 24 and 20, 21 will close.
If the input voltage get lower than the minimal tripping threshold (parameter
) within the curtain time
defined by user (parameter
)
– then the RNPP-302 will turn OFF the power load: terminals 23, 24 will
close while 22, 24 and 20, 21 will open.
If the voltage decrease is more than 80 V regardless of the preset voltage tripping threshold the RNPP-302
will cut OFF the power load within 0,1 second (accelerated turn OFF).
After the recovery of the voltage parameters
– when controlled voltage becomes 5-6 V higher than minimal
tripping threshold (voltage hysteresis is 5-6 V) the relay will automatically turn ON the power load with delay
time defined by
parameter.
If the increase in input voltage is more than the maximal tripping threshold (parameter
) within the
curtain time defined by user (parameter
)
– then the RNPP-302 will turn OFF the power load: terminals
23, 24 will close while 22, 24 and 20, 21 will open. After the recovery of the voltage parameters
– when
controlled voltage becomes 5-6 V lower than maximal tripping threshold (voltage hysteresis is 5-6 V) the relay
will automatically turn ON the power load with delay time defined by
parameter.
4.3. Control of the additional voltage parameters
In all above stated modes of operation the RNPP-302 performs permanent control over additional voltage
parameters and in case of deviation from the preset values it turns OFF the power load and turns ON the
alarm signalization. On the recovery of voltage level and cancel of the alarm situation RNPP-302 will turn ON
the power load after the
time and turn OFF the signalization.
RNPP-302 performs the control over following parameters:
1) Phase imbalance. If the parameter
=1 the RNPP-302 performs the control over phase imbalance
and the tripping threshold for the phase imbalance is defined by parameter
.
2) Wrong phase sequence and phase combination. If the parameter
=1 RNPP-302 monitors the
correct phase sequence and the absence of the phase combination.
3) Feedback control of the voltage presence on the contactor (magnetic starter) terminals. If the contactor
has burned or stuck contacts
– RNPP-302 will cut the output relay and turn ON the alarm signalization. This
function is of a great importance as the equipment could be damaged due to bad or damaged contactor
whereas all input voltage parameters are fine and correct.
If the parameter
=1 the RNPP-302 detects the presence of the voltage on the output terminals of the
contactor and in case the stuck contacts it turns OFF the power load and turns ON the alarm signalization.
If the parameter
=2 the RNPP-302
checks the voltage presence on the output contactor contacts and
allows all contacts to be opened (full-phase disconnection is permitted). The alarm situation is detected only in
case one or two contacts of the contactor are opened. So it may be the situation when only one or two phases
will come to the equipment because of a damaged or not properly working contactor and this may result to the
damage of the equipment or installation. This function is essential when the equipment or power load need to
be switched ON/OFF using the remote control switch or additional technological contact.
To restart the operation of the RNPP-302 again after the detection of wrong phase sequence or the
absence of voltage on the contactor output terminals it will be necessary to eliminate the reason of the
power interruption, then reconnect the RNPP-302 and then turn ON the power supply.
4) Control of the external signals coming to the digital input. It is defined by parameters
=1 (
=2).
RNPP-302 has the digital input that may be used to detect the external alarm situation (for example the signal
from thermostat built into the AC motor coil). On getting the signal the RNPP-302 immediately disconnect the
power load and displa
ys the “
A1
” alarm code. When the alarm situation is eliminated (there is no signal from
the external source) the RNPP-302 will automatically turn on the power load with the delay time defined by
parameter.
