Novatek THREE-PHASE VOLTAGE RELAY RNPP-301 RNPP-301 データシート
製品コード
RNPP-301
- 3 -
NOVATEK-ELECTRO
RNPP-301
relay keeps operational capability when at least two phases are present.
The relay is connected in parallel to load by the L1, L2, L3 input contacts (the 4, 5, 6 terminals respectively).
The neutral connection mode (N, the 7 terminal) corresponds to the mains voltage monitoring mode of operation
selected by user. The 1, 2, 3 terminals provide the MS power contacts status monitoring and are connected to the
output MS power contacts terminals (see the wiring diagram). The relay has two groups of independent output
contacts (10-11, 12-13). In the "dead status” of the relay (a voltage is not applied to the relay, the relay is not
connected) the 12-13 are the N.O. contacts and the 10-11 are N.C. contacts. After the relay has been connected
in parallel to load when voltage is present in the mains and there is no cause for the relay to trip, the 12-13 contacts
are being closed and the 10-11 contacts are being opened with the user-set reset delay T
selected by user. The 1, 2, 3 terminals provide the MS power contacts status monitoring and are connected to the
output MS power contacts terminals (see the wiring diagram). The relay has two groups of independent output
contacts (10-11, 12-13). In the "dead status” of the relay (a voltage is not applied to the relay, the relay is not
connected) the 12-13 are the N.O. contacts and the 10-11 are N.C. contacts. After the relay has been connected
in parallel to load when voltage is present in the mains and there is no cause for the relay to trip, the 12-13 contacts
are being closed and the 10-11 contacts are being opened with the user-set reset delay T
on
.
When the relay tripped, load is de-energized due to the break in the MS coil power circuit by the N. O. 12-13
contacts.
It is recommended the 12-13 contacts to connect in series with the MS coil power supply.
The 10-11, 12-13 output contacts specification
Max. current for ~ 250 VAC Max. power Max sustained safe voltage~ Max. current for U=30VDC
Cos
φ = 0.4
3A
1200VA
460V
3A
Cos
φ = 1.0
5A
MS power contacts transfer monitoring
One of the relay functions is the monitoring of the MS power contacts position before load energization and after
load is energized. The monitoring is performed if the 1, 2, 3 terminals are connected to the corresponding phases of
the MS output contacts. The monitoring is performed as follows:
the MS output contacts. The monitoring is performed as follows:
1. Before load is energized a test for open position of all three MS power contacts is performed. If at least one
contact is closed ("sticks") the relay will be disabled, the load is not energized, all red “FAULT” LEDs are ON. To
enable the relay one needs to remove supply voltage from it. It's recommended to test the MS running order,
following safety regulations.
enable the relay one needs to remove supply voltage from it. It's recommended to test the MS running order,
following safety regulations.
2. When load is energized, the test for closed position of all three MS power contacts is performed. If at least
one MS phase contact is open, the relay will trip to de-energize load and will be disabled. All red “FAULT” LEDs
are ON. To enable the relay one needs to remove supply voltage from it. It's recommended to test the MS running
order, following safety regulations.
are ON. To enable the relay one needs to remove supply voltage from it. It's recommended to test the MS running
order, following safety regulations.
3. When the relay trips for load de-energization, the test for open position of all three MS phase contacts is per-
formed. If at least one contact is closed ("sticks"), the relay will energize and de-energize the magnetic starter one-
two times. If the defect is not eliminated, the relay will be disabled, all red “FAULT” LEDs will be ON. To release
the relay one needs to remove supply voltage from it. It's recommended to test the MS running order, following
safety regulations.
two times. If the defect is not eliminated, the relay will be disabled, all red “FAULT” LEDs will be ON. To release
the relay one needs to remove supply voltage from it. It's recommended to test the MS running order, following
safety regulations.
Indication
•
the green LED «ON» is always on when at least one phase is under supply voltage;
•
the green LED «Load» switches on when the load is energized (the 12-13 output terminals are closed);
•
each of three LED indicators «Fault» flashes according to specific type of fault; all three LEDs flash in turn
when there is phase reversal and/or phase “coincidence”; LEDs «Umin» and «PI» are flashing when there is a
phase loss; all three LEDs are on if the relay is disabled for the MS power contacts not-switching.
when there is phase reversal and/or phase “coincidence”; LEDs «Umin» and «PI» are flashing when there is a
phase loss; all three LEDs are on if the relay is disabled for the MS power contacts not-switching.
Controls
The relay has six independent controls for basic parameters. For user’s convenience screwdriver slots of
adjusting potentiometers are brought out to the relay front panel.
•
U
min
— trip threshold for the minimum allowable voltage, % of rated voltage;
•
U
max
— trip threshold for the maximum allowable voltage, % of rated voltage;
•
PI — phase/line voltage imbalance threshold (according to selected monitoring mode), difference between RMS
phase/line voltages, % of a lesser value;
phase/line voltages, % of a lesser value;
•
T
min
— trip delay for the minimum voltage that allows to ignore transient and/or starting voltage drops; it's
recommended to set Tmin no less than 10 sec.
•
T
off
— trip delay covering all types of the mains voltage faults, undervoltage excluded. It's recommended to set
T
off
no less than 1-1,5 sec to prevent the excessive relay trippings due to switching perturbations in the mains;
•
T
on
— automatic reset delay after the relay tripped and the mains voltage parameters have regenerated; this is
also the energization time delay after the normal voltage was applied to the relay.
4 PRELIMINARY STARTING PROCEDURE AND SERVICE MANUAL
The relay is ready for service and needs no pre-starting procedure measures. Due to digital technology the
relay trip settings are calibrated quite accurate, so to set adjustments one doesn't need to read voltage on the
control voltmeter. In order to install the relay at the using activity after extended storage it's recommended to test
functionality of the relay. The application of the relay according to specifications above and to the present service
manual, continuous work included, allows not to carry out preventive maintenance during service life.
control voltmeter. In order to install the relay at the using activity after extended storage it's recommended to test
functionality of the relay. The application of the relay according to specifications above and to the present service
manual, continuous work included, allows not to carry out preventive maintenance during service life.
To put the relay in operation one must follow operating instructions given below: