NOVATEK-ELECTRO LTD Research-and-Manufacture Company RNPP-301 THREE PHASE VOLTAGE AND PHASE MONITORING RELAY USERS MANUAL CONTROLS DESCRIPTION AND DIMENSIONS DIAGRAM 1. control for minimum voltage threshold, Umin (%) 7. green LED signal that the mains voltage is present, ON 2. control for maximum voltage threshold, Umax (%) 8. green LED signal that load is energized, Load 3. control for peak phase imbalance threshold, PI (%) 9. red LEDs signal for the mains voltage fault/ magnetic starter (MS) power contacts monitoring, Fault 4. control of trip delay setting for Umin, Tmin (sec) 10. MS power contacts monitoring terminals 5. control of trip delay setting for the mains voltage faults, 11. input contacts Toff (sec) 6. control for automatic reset delay setting, Ton (sec) 12. output contacts 13. terminals for the mode selection: line/phase voltage monitoring. www.novatek-electro.com - 2 - 1 APPLICATIONS A RNPP-301 voltage control relay is designed for: 1. monitoring of the tolerable RMS phase/line voltage level (at the option of user) with independent setting adjustments for the minimum/maximum voltage thresholds 2. monitoring of the correct phase sequence and phase non-coincidence (the phases are supposed to be coinciding when a load is energized not from two different phases but instead from one and the same phase) 3. monitoring of three phase lines for voltage presence and the mains voltage symmetry with adjustable phase imbalance setting 4. monitoring of the magnetic starter power contacts status at no-load and under load 5. the load (415V/50Hz) de-energization with user-set trip delay (Toff) through the opening the magnetic starter coil power circuit (A.C and D.C. electric circuit switching) when fault conditions occur 6. the mains voltage quality monitoring after the relay had tripped and did reset automatically with the user-set reset delay (Ton) upon the voltage parameters regeneration 7. all fault conditions (not switching of the magnetic starter power contacts is included) are displayed by special LEDs indicating the specific cause of the occurring voltage fault in the mains. 2 TECHNICAL BRIEF Rated phase/line voltage, V 240/415 Mains frequency, Hz ... 45-55 Adjustable range for Umin, % of nominal value .. 5-25 Adjustable range for Umax, % of nominal value . 5-25 Adjustable range for phase imbalance, % 5-20 Adjustable range for Tmin, sec .. 0-20 Adjustable range for Toff, sec . 0-10 Adjustable range for Ton, sec 0-600 Minimum trip delay when threshold settings are reached, sec . 0.1 Reset/energization delay when the relay energizes, sec, not more than 0.2 Voltage hysteresis, V .. 5-6 Accuracy of trip threshold for voltage, V, not more than 3 Phase imbalance accuracy, %, not more than 1.5 Safe operating voltage, % of rated value . 30-130 Power required (under load), VA, not more than 3.0 Maximum switched current of output contacts, A 5 Output contacts life: under load 5A, no less than, operations . 100 000 1 mln. under load 1A, no less than, operations . Protection degree of: IP40 apparatus . IP20 terminal block .. Operating temperature range, C .. from -35 to +55 Storage temperature, C . from -45 to +70 Weight, no more than, kg 0.200 Case dimensions 4 modules of S-type Mounting 35 mm DIN-rail Mounting position as desired 3 DESCRIPTION The RNPP-301 relay (hereafterthe rela) is a digital microprocessor device that provides a high degree of reliability and accuracy. The relay doesn t require any auxiliary power supply because it is self-powered by the three-phase voltage to be monitored. This permits the relay to keep operate capability even when only one phase is present (in the three-phase systems with neutral). Two modes of the mains voltage monitoring can be selected at the user s option: The phase voltage monitoring mode To enable phase voltage monitoring mode it s necessary to remove jumper in between terminals 8-9 and connect neutral wire to terminal 7. This mode of operation is recommended fot the situations when for the machinery the neutral shift is very critical (within the range of user preset values) and when phase imbalance is a matter of a great concern. The line voltage monitoring mode To go into this mode of operation one needs to apply the jumper strap between terminals 8-9 in this case to connect the neutral is not necessary. This mode of operation is recommended when the neutral drift value and phase voltage imbalance is not important as well as for isolated neutral three-phase systems. The relay will trip when line voltage imbalance between phases occurs. NOTE: To keep the relay operative and informative when only one phase is present it s advisable to connect the neutral to the terminal 7 not removing the jumper strap between terminals 8-9. In 3-Phase systems without neutral the RNPP-301 NOVATEK-ELECTRO