K8DS-PZ1

New Product Three-phase Voltage, Asymmetry, and Phase-sequence Phase-loss Relay K8DS-PZ Ideal for Monitoring 3-phase Power Supplies for Industrial Facilities and Equipment. • Greater resistance to inverter noise. • Monitor undervoltages, overvoltages, voltage asymmetry, phase sequence, and phase loss in three-phase three-wire circuits with one unit. • One SPDT output relay, 5 A at 250 VAC (resistive load). • World-wide power specifications supported by one unit. (Set with a rotary switch.) • Relay status can be monitored using LED indicator. Refer to Safety Precautions on page 9. Refer to page 7 for commonly asked questions. For the most recent information on models that have been certified for safety standards, refer to your OMRON website. Ordering Information List of Models Rated input voltage* 3-phase 3-wire mode 200, 220, 230, or 240 VAC Model K8DS-PZ1 380, 400, 415, or 480 VAC K8DS-PZ2 Note: The input range is set with a rotary switch. * The power supply voltage is the same as the rated input voltage. 1 K8DS-PZ Ratings and Specifications Ratings Rated input voltage K8DS-PZ1 Three-phase, three-wire Mode: 200, 220, 230, or 240 VAC K8DS-PZ2 Three-phase, three-wire Mode: 380, 400, 415, or 480 VAC Input load K8DS-PZ1: Approx. 1.7 VA K8DS-PZ2: Approx. 2.8 VA Operating value setting range (OVER/UNDER) (ASY) Overvoltage/Undervoltage 2% to 30% of rated input voltage Asymmetry 5% to 22% of rated input voltage Operating value (OVER/UNDER) Operates at 100% of set value. Operating value (ASY.) Asymmetry operating value = Rated input voltage × Asymmetry set value (%) The asymmetry operation will function when the potential difference between the highest and lowest voltage phases equals or exceeds the asymmetry operating value. Reset value 5% of operating value (fixed) Reset method Automatic reset Overvoltage/Undervoltage Operating time setting range Asymmetry (T) Phase sequence Phase loss 0.1 to 30 s 0.1 to 30 s 0.1 s±0.05 s 0.1 s max. Power ON lock time (LOCK) 1 s±0.5 s Indicators Power (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red Output relays One SPDT relay output Output relay ratings Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC: 50,000 operations 3 A at 250 VAC: 100,000 operations Ambient operating temperature −20 to 60°C (with no condensation or icing) Storage temperature −25 to 65°C (with no condensation or icing) Ambient operating humidity 25% to 85% (with no condensation) Storage humidity 25% to 85% (with no condensation) Altitude 2,000 m max. Terminal screw tightening torque 0.49 to 0.59 N·m Recommended wire Solid wire: 2.5 mm2 Twisted wires: AWG16, AWG18 Terminal wiring method Note: 1. Ferrules with insulating sleeves must be used with twisted wires. 2. Two wires can be twisted together. Recommended ferrules Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact Al 1-8RD (for AWG18) manufactured by Phoenix Contact Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact 2 Case color N1.5 Case material PC and ABS, UL 94 V-0 Weight Approx. 65 g Mounting Mounts to DIN Track. Dimensions 17.5 × 80 × 74 mm (W×D×H) K8DS-PZ Specifications Input frequency 50/60 Hz Overload capacity Continuous 500 V ±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage, 50/60 Hz sine wave input) Repeat accura- Operating value cy Operating time Applicable standards ±50 ms (at 25°C and 65% humidity, rated power supply voltage) Conforming standards EN 60947-5-1 Installation environment (pollution level 2, installation category III) EMC EN 60947-5-1 Safety standards UL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14 Insulation resistance 20 MΩ min. Between external terminals and case Between input terminals and output terminals Dielectric strength 2,000 VAC for one minute Between external terminals and case Between input terminals and output terminals Noise immunity 1,500 V power supply terminal common/normal mode Square-wave noise of ±1 µs/100 ns pulse width with 1-ns rise time Vibration resistance Frequency: 10 to 55 Hz, acceleration 50 m/s2 10 sweeps of 5 min each in X,Y, and Z directions Shock resistance 100 m/s2, 3 times each in 6 directions along 3 axes Degree of protection Terminals: IP20 ●Relationship of Mounting Distance between K8DS-PZ Relays and Ambient Temperature (Reference Values) The following diagram shows the relationship between the mounting distances and the ambient temperature. If the relay is used with an ambient temperature that exceeds these values, the temperature of the K8DS may rise and shorten the life of the internal components. 70 Ambient temperature [°C] 60 50 40 30 20 10 0 5 10 15 20 25 30 35 40 45 50 Distance between products d [mm] Test method Sample: K8DS-PZ Distance between products: 0, 5, 10, and 50 mm K8DS No.1 DIN Track K8DS No.2 K8DS No.3 K8DS No.4 K8DS No.5 Distance between products: d 3 K8DS-PZ Connections Terminal Diagram Control Output L2 L1 Relay output 250 VAC, 5 A (resistive load) 30 VDC, 5 A (resistive load) Input Voltages L3 L1 L2 L3 3-phase, 3-wire power supply Phase-to-phase voltage: 200 to 480 VAC Relay Output 14 12 11 12 14 11 Note: Use the recommended ferrules if you use twisted wires. Wiring Example L1 3-phase voltage L2 Motor L3 L1 L2 L3 Power supply AC/DC 14 12 11 Timing Charts ●Overvoltage, Undervoltage, Phase Sequence, and Phase Loss Operation Diagram Overvoltage set value Hysteresis: Fixed at 5% Asymmetry operating value L1 Input L2 L3 Undervoltage set value Hysteresis: Fixed at 5% Flashing Alarm indicator Flashing Lit Lit t Flashing Lit t: Operating time (0.1 to 30 s) Contacts t t: Operating time (0.1 to 30 s) t1: Power ON lock (1 s) t1 Phase Loss Operation Phase sequence Operation L2 L1 L3 L1 Operation Table L1 L1 L3 L2 L2 L3 L2 L1 L3 Input L2 Item L3 Lit Flashing Flashing Flashing Alarm indicator Relay 11-14 Note: 1. The K8DS-PZ† output contacts are normally operative. 2. The power ON lock prevents unnecessary alarms from being generated during the unstable period when the power is first turned ON. There is no contact output during timer operation. 3. Phase loss is detected by a drop in the L1, L2, or L3 voltage. A phase loss is detected when any of the phase-to-phase voltages goes below 60% of the rated input. 4. L2 and L3 are also used for the power supply. If the voltage becomes very low, the Relay will not operate. 5. Phase loss (on power supply side and load side) is not detected in the motor load during operation. 4 Indicators RY_LED ALM_LED Contact operation Overvoltage OFF ON OFF Undervoltage OFF ON OFF Asymmetry OFF ON OFF Phase loss OFF ON*1 OFF OFF Flashing*2 OFF ON OFF ON Incorrect phase Phase sequence Correct phase *1 *2 L2 and L3 are also used for the power supply. If the voltage becomes very low, the indicator will turn OFF. The indicator will flash once per second after an incorrect phase is detected and once per 0.5 second during the detection time. K8DS-PZ Nomenclature Front ●Indicators Terminal block (See notes 1 and 2.) Item L1 L2 L3 Input voltage range rotary switch Power indicator Asymmetry rate knob (ASY.) Meaning Power indicator (PWR: Green) Lit when power is being supplied.* Relay status indicator (RY: Yellow) Lit when relay is operating (normally lit). Alarm indicator (ALM: Red) Lit for asymmetry voltage error. When the input exceeds the set value, the indicator flashes for the operating time to indicate the error status. Relay status indicator Overvoltage/undervoltage knob (OV/UV) Alarm indicator * This indicator uses the input across L2 and L3 as the internal power supply. It will not light unless there is an input across L2 and L3. ●Setting Knobs Operating time knob (T) Item Terminal block (See notes 1 and 2.) 14 12 11 Description Input voltage range rotary switch Used to change the input voltage range. K8DS-PZ1: 200, 220, 230, or 240 V K8DS-PZ2: 380, 400, 415, or 480 V Overvoltage/undervoltage knob (OV/UN) Used to set from 2% to 30% of the rated input. Asymmetry rate knob (ASY.) Used to set from 5% to 22%. Operating time knob (T) Used to set the operating time to 0.1 to 30 s. Note: 1. Use either a solid wire of 2.5 mm2 maximum or a ferrule with insulating sleeve for the terminal connection. The length of the exposed current-carrying part inserted into the terminal must be 8 mm or less to maintain dielectric strength after connection. For 2.5 mm2 or smaller solid wires For ferrules with an insulation sleeve. 8 mm max. 8 mm max. Recommended ferrules Phoenix Contact • Al 1,5-8BK (for AWG16) • Al 1-8RD (for AWG18) • Al 0,75-8GY (for AWG18) 2. Tightening torque: 0.49 to 0.59 N·m Operation Methods Connections ●Input L1 L2 L3 Wire the input to the L1, L2, and L3 terminals (3-phase, 3-wire). Make sure the phase sequence is wired correctly. The Unit will not operate normally if the phase sequence is incorrect. Voltage input ●Outputs L1 L2 L3 Terminals 11, 12, and 14 are the output terminals. * Use the recommended ferrules if you use twisted wires. 14 Signal output 12 11 Relay signal output Load 5 K8DS-PZ Setting Methods ●Asymmetry The asymmetry rate is set using the asymmetry rate knob (ASY). The setting range is 5% to 22% of the rated input. To correctly detect asymmetry, set the asymmetry rate knob to a value that is equal to or less than the overvoltage/undervoltage set value. If you set it to a value that is greater than the overvoltage/undervoltage set value, overvoltage/undervoltage detection will operate first, and asymmetry alarms will not be output. If the knob is turned with an input applied to the input terminals, the alarm indicator will flash when the set value equals the input value. Use this as a guide to make the setting. The rated input depends on the model and the rotary switch setting. Example: K8DS-PZ1 with Rotary Switch Set to 200 V The rated input is 200 VAC, so the setting range is 4 to 44 V. If you set the setting knob (ASY.) to 10%, the asymmetry operating voltage would be 20 V and an alarm would be output when the difference between the highest and lowest phase-to-phase voltages exceeds 20 V. ●Overvoltage/Undervoltage Overvoltage/Undervoltage is set using the overvoltage/undervoltage knob (OV/UV). The setting range is 2% to 30% of the rated input for overvoltage detection and −2% to −30% of the rated input for an undervoltage detection. Use this as a guide to make the setting. The rated input depends on the model and the rotary switch setting. Example: K8DS-PZ1 with Rotary Switch Set to 200 V The rated input is 200 VAC, so the setting range is 204 to 260 V for overvoltage detection and 140 to 196 V for undervoltage detection. ●Operating Time The operating time is set using the operating time knob (T). The operating time can be set to between 0.1 and 30 s. Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the same level.) Use this as a guide to set the operating time. If the input exceeds (or drops lower than) the voltage set value, the alarm indicator will start flashing for the set period and then stay lit. Dimensions (Unit: mm) Three-phase Voltage, Asymmetry, and Phase-sequence Phase-loss Relays K8DS-PZ1 K8DS-PZ2 74 17.5 80 44 69 Optional Parts for DIN Track Mounting ●DIN Tracks PFP-100N PFP-50N 7.3±0.15 4.5 35±0.3 15 25 10 25 25 1,000 (500)* 10 25 15 (5)* 27±0.15 1 *Dimensions in parentheses are for the PFP-50N. 6 K8DS-PZ Questions and Answers Q Q Checking Operation How to Measure the Operating Time Overvoltage Change the input value quickly from 70% to 120% of the set value and measure the time required for the Relay to operate. Undervoltage Change the input value quickly from 120% to 70% of the set value and measure the time required for the Relay to operate. Operating Time Adjust the slide resistor so that the voltage applied to the K8DS terminals is 120% of the set value for overvoltage detection, 80% of the set value for undervoltage detection, or equal to or greater than the asymmetry operating value when the auxiliary relay in connection diagram 2 operates. Close the switch and use a cycle counter to measure the operating time. Overvoltage Gradually increase the input from 80% of the set value. The input will equal the operating value when the input exceeds the set value and the alarm indicator starts flashing. Operation can be checked because the Relay will operate after the operating time has passed. Undervoltage Gradually decrease the input from 120% of the set value and check the operation using the same method as for an overvoltage. Example: Monitoring Mode for Rated Voltage of 200 V and an Operating Time Setting of 5 s Connection Diagram 2 Operating set value Input voltage L1 Flashing Lit Alarm indicator L2 L1 5s R1 Relay output Asymmetry With the rated input voltage applied, gradually change one of the phase-to-phase voltages. The Relay will operate when the difference between the highest and lowest voltage phases reaches or exceeds the asymmetry operating value. Asymmetry operating value = Rated input voltage × Asymmetry set value (%) X X/a X/b V2 V3 L3 R2 L2 R1: Sliding resistor, 200 Ω, 200 W R2: 100 Ω, 400 W L3 Example: Monitoring Mode for Rated Voltage of 200 V and an Operating Time Setting of 5 s ± C 200 V Cycle counter L1 Asymmetry operating voltage (set value) Input L2 L3 Q Flashing Lit Alarm indicator Relay output T: Operating time (0.1 to 30 s) T T1: Power ON lock (1 or 5 s) Connection Diagram 1 L1 V1 3-phase, 200 VAC V1 3-phase, 200 VAC L2 V2 Checking the Phase Sequence and Phase Loss Operation Phase Sequence Switch the wiring, as shown by the dotted lines in connection diagram 1, to reverse the phase sequence and check that the K8DS operates. Phase loss Create a phase loss for any input phase and check that the K8DS operates. V3 L1 L3 0 to 150 V L2 L3 3-phase variable autotransformer 7 K8DS-PZ Questions and Answers Q Q Load-side Phase Loss In principle, phase loss cannot be detected on the load side because the K8DS-PZ measures three-phase voltage to determine phase loss. Q Motor Load Phase Loss during Operation Motor load phase loss cannot be detected during operation. It can be used to detect phase loss at startup. Normally, three-phase motors will continue to rotate even if one phase is open. The three-phase voltage will be induced at the motor terminals. The diagram shows voltage induction at the motor terminals when phase R has been lost with a load applied to a three-phase motor. The horizontal axis shows the motor load as a percentage of the rated load, and the vertical axis shows voltage as a percentage of the rated voltage. The lines in the graph show the voltage induced at the motor terminals for each load phase loss occurs during operation. As the graph shows, phase loss cannot be detected because the motor terminal voltage does not drop very much even if a phase is lost when the load on the motor is light. To detect motor load phase loss during operation, use the undervoltage detection function to detect the motor terminal voltages at phase loss. Set the operating time carefully because it will affect the time from when the phase loss occurs until tripping when this function is used. Characteristic Curve Diagram Voltage (as a percentage of rated voltage) Note: This characteristic curve shows the approximate values only. 100 95 90 VST 85 80 VTR 75 70 65 60 55 50 45 0 VRS 10 20 30 40 50 60 70 80 90 100 110 Motor load (as a percentage of rated load) Note: For phase loss of phase R. VST, VTR, and VRS indicate the motor terminal voltage at phase loss. 8 Is an overvoltage detected if only one of the three-phase phase-to-phase voltages exceeds the overvoltage set value? The K8DS monitors all three phase voltages. Therefore, an overvoltage is detected if only one of the phase-to-phase voltages exceeds the set value. The same is true for undervoltages. K8DS-PZ Safety Precautions Be sure to read the precautions for all models in the website at the following URL: http://www.ia.omron.com/. Warning Indications WARNING Indicates a potentially hazardous situation which, if not avoided, will result in minor or moderate injury, or may result in serious injury or death. Additionally there may be significant property damage. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury or in property damage. Precautions for Safe Use Supplementary comments on what to do or avoid doing, to use the product safely. Precautions for Correct Use Supplementary comments on what to do or avoid doing, to prevent failure to operate, malfunction, or undesirable effects on product performance. Meaning of Product Safety Symbols Used to warn of the risk of electric shock under specific conditions. WARNING Electrical shock may occasionally cause serious injury. Confirm that the input voltage is OFF before starting any wiring work and wire all connections correctly. CAUTION Electrical shock may cause minor injury. Do not touch terminals while electricity is being supplied. There is a risk of minor electrical shock, fire, or device failure. Do not allow any pieces of metal, conductors, or cutting chips that occur during the installation process to enter the product. Explosions may cause minor injuries. Do not use the product in locations with inflammable or explosive gases. Used for general prohibitions for which there is no specific symbol. There is a risk of minor electrical shock, fire, or device failure. Do not disassemble, modify, repair, or touch the inside of the product. Used to indicate prohibition when there is a risk of minor injury from electrical shock or other source if the product is disassembled. Loose screws may cause fires. Tighten terminal screws to the specified torque of 0.49 to 0.59 N·m. Used for general mandatory action precautions for which there is no specified symbol. Use of excessive torque may damage the terminal screws. Tighten terminal screws to the specified torque of 0.49 to 0.59 N·m. Use of the product beyond its life may result in contact welding or burning. Make sure to consider the actual operating conditions and use the product within its rated load and electrical life count. The life of the output relay varies significantly with the switching capacity and switching conditions. 9 K8DS-PZ Precautions for Safe Use 1. Do not use or store the product in the following locations. • Locations subject to water or oil • Outdoor locations or under direct sunlight • Locations subject to dust or corrosive gases (particularly sulfurizing gases, ammonia, etc.) • Locations subject to rapid temperature changes 5. To reduce the error in the setting knob, always turn the setting knob from the minimum setting toward the maximum setting. 6. Phase loss is detected only when the power supply to the motor is turned ON. Phase loss during motor operation is not detected. 7. Phase loss can be detected only from the input contacts to the power supply side. Phase loss cannot be detected from the input contacts to the load side. 8. When cleaning the product, do not use thinners or solvents. Use commercial alcohol. • Locations prone to icing and dew condensation • Locations subject to excessive vibration or shock • Locations subject to wind and rain • Locations subject to static electricity and noise • Habitats of insects or small animals 2. Use and store the product in a location where the ambient temperature and humidity are within the specified ranges. If applicable, provide forced cooling. 3. Mount the product in the correct direction. 4. Do not wire the input and output terminals incorrectly. 5. Make sure the input voltage and loads are within the specifications and ratings for the product. 6. Make sure the crimp terminals for wiring are of the specified size. 7. Do not connect anything to terminals that are not being used. 8. Use a power supply that will reach the rated voltage within 1 second after the power is turned ON. 9. Keep wiring separate from high voltages and power lines that draw large currents. Do not place product wiring in parallel with or in the same path as high-voltage or high-current lines. 10.Do not install the product near equipment that generates high frequencies or surges. 11.The product may cause incoming radio wave interference. Do not use the product near radio wave receivers. 12.Install an external switch or circuit breaker and label it clearly so that the operator can quickly turn OFF the power supply. 13.Make sure the indicators operate correctly. Depending on the application environment, the indicators may deteriorate prematurely and become difficult to see. 14.Do not use the product if it is accidentally dropped. The internal components may be damaged. 15.Be sure you understand the contents of this catalog and handle the product according to the instructions provided. 16.Do not install the product in any way that would place a load on it. 17.When discarding the product, properly dispose of it as industrial waste. 18.The product must be handled only by trained electrician. 19.Prior to operation, check the wiring before you supply power to the product. 20.Do not install the product immediately next to heat sources. 21.Perform periodic maintenance. Mounting and Removing • The product may be mounted in any direction, but it must be mounted securely and as level as possible. • To mount the product to the DIN Track, hook it on the DIN Track at (A) and then press in on the Unit in direction (B). (A) (B) • To remove the product, insert a flat-blade screwdriver at (C) and pull down the hook to release the Unit. (C) Hook • Leave at least 30 mm of space between the product and other devices to allow easy installation and removal. Operating the Setting Knobs and Rotary Switch • Use a screwdriver to adjust the setting knobs and rotary switch. The knobs have a stopper that prevents them from turning beyond the full right or left position. Do not force a knob beyond these points. Precautions for Correct Use Observe the following operating methods to prevent failure and malfunction. 1. Use the input power and other power supplies and converters with suitable capacities and rated outputs. 2. Use a precision screwdriver or similar tool to adjust the setting knobs and rotary switches. 3. The distortion in the input waveform must be 30% max. If the input waveform is distorted beyond this level, it may cause unnecessary operation. 4. The product cannot be used for thyristor control or on the secondary side of an inverter. 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Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions. OMRON AUTOMATION AND SAFETY • THE AMERICAS HEADQUARTERS • Chicago, IL USA • 847.843.7900 • 800.556.6766 • www.omron247.com OMRON CANADA, INC. • HEAD OFFICE Toronto, ON, Canada • 416.286.6465 • 866.986.6766 • www.omron247.com OMRON ARGENTINA • SALES OFFICE Cono Sur • 54.11.4783.5300 OMRON ELECTRONICS DE MEXICO • HEAD OFFICE México DF • 52.55.59.01.43.00 • 01-800-226-6766 • mela@omron.com OMRON CHILE • SALES OFFICE Santiago • 56.9.9917.3920 OMRON ELECTRONICS DE MEXICO • SALES OFFICE Apodaca, N.L. • 52.81.11.56.99.20 • 01-800-226-6766 • mela@omron.com OTHER OMRON LATIN AMERICA SALES 54.11.4783.5300 OMRON ELETRÔNICA DO BRASIL LTDA • HEAD OFFICE São Paulo, SP, Brasil • 55.11.2101.6300 • www.omron.com.br OMRON EUROPE B.V. • Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands. • +31 (0) 23 568 13 00 • www.industrial.omron.eu Authorized Distributor: Automation Control Systems • Machine Automation Controllers (MAC) • Programmable Controllers (PLC) • Operator interfaces (HMI) • Distributed I/O • Software Drives & Motion Controls • Servo & AC Drives • Motion Controllers & Encoders Temperature & Process Controllers • Single and Multi-loop Controllers Sensors & Vision • Proximity Sensors • Photoelectric Sensors • Fiber-Optic Sensors • Amplified Photomicrosensors • Measurement Sensors • Ultrasonic Sensors • Vision Sensors Industrial Components • RFID/Code Readers • Relays • Pushbuttons & Indicators • Limit and Basic Switches • Timers • Counters • Metering Devices • Power Supplies Safety • Laser Scanners • Safety Mats • Edges and Bumpers • Programmable Safety Controllers • Light Curtains • Safety Relays • Safety Interlock Switches /&





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