NEW Product Thermistor Motor Protection Relay K8AK-TS/-PT Monitor Temperature Rise through Internal Motor Loss * Temperature, phase sequence, and phase loss monitoring with the DIN 22.5-mm-sized K8AK-PT Relays. * Side-by-side mounting of K8AK-PT Relays. * Specially designed for internal motor monitoring; no setting required. * Test/Reset Button for confirmation of output operation. * Monitoring also performed for thermistor disconnections and short circuits. * Manual or automatic resetting with the same Relay. Refer to Safety Precautions on page 8. 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 Function Power supply voltage Phase sequence, phase loss, and temperature monitoring Model K8AK-PT1 100-240 VAC 100 to 240 VAC K8AK-TS1 100-240 VAC Temperature monitoring 24 VAC/DC K8AK-TS1 24 VAC/DC 1 K8AK-TS/-PT Ratings and Specifications Ratings Power supply voltage Isolated power supply Power consumption 24 VAC/DC: 1.8 VA/1.0 W max. 100 to 240 VAC: 3.5 VA max. Rated input voltage 3-phase, 200 to 480 VAC (3-wire) Phase sequence on threephase voltage input Operating time Phase loss on three-phase 2 24 VAC/DC 100 to 240 VAC 0.1 s0.05 s voltage input 0.1 s max. (when the voltage changes rapidly from 100% to 0% of rated voltage) PTC thermistor input 0.2 s max. Reset method Manual reset/automatic reset (switchable) Note: Manual reset method: Press the TEST/RESET button. Indicators Power (PWR): Green, PH_Alarm outputs (ALM): Red, TS_Alarm outputs (ALM): Red Output relays One SPDT relay output (normally closed operation) 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 or 30 VDC: 50,000 operations 3 A at 250 VAC or 30 VDC: 100,000 operations Ambient operating temperature -20 to 60C (with no condensation or icing) Storage temperature -25 to 65C (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 Terminal wiring method Recommended wire Solid wire: 2.5 mm2 Twisted wires: AWG16, AWG18 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 Case color N1.5 Case material PC and ABS, UL 94 V-0 Weight Approx. 150 g Mounting Mounts to DIN Track. Dimensions 22.5 x 90 x 100 mm (WxHxD) K8AK-TS/-PT Specifications Allowable operating voltage range 85% to 110% of rated power supply voltage Allowable operating frequency range 50/60 Hz 5 Hz Input frequency 50/60 Hz Input overload capacity Continuous 528 V Phase loss detection level 80%10% of rated input If any phase-to-phase voltage drops to 80%10% of the other phase-to-phase voltages, voltage asymmetry is detected and the phase loss function is performed. PTC thermistor Operating value precision 3,100 5% Reset value precision 1,650 5% Short circuit detection value 0 to 10 5 precision Temperature drift Operating time repeatability Conforming standards Applicable stanEMC dards Safety standards 0.1%/C max. 50 ms EN 60947-5-1 Installation environment (pollution level 2, installation category III) EN 60947-5-1 UL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5 Insulation resistance 20 M min. Between external terminals and case Between power supply terminals and input terminals Between power supply terminals and output terminals Between input terminals and output terminals Dielectric strength 2,000 VAC for one minute Between external terminals and case Between power supply terminals and input terminals Between power supply terminals and output terminals Between input terminals and output terminals Noise immunity 1,500 V power supply terminal common/normal mode Square-wave noise of 1 s/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 3 K8AK-TS/-PT Connections Terminal Diagram K8AK-PT1 100-240VAC A B Control Output Relay output 250 VAC, 5 A (resistive load) 30 VDC, 5 A (resistive load) A Three-phase Input K8AK-PT (with 3-phase input) Input Range L3 L2 3-phase input 3-phase, 200 to 480 VAC L1 L2 L3 T1 T2 Y1 Common PTC thermistor L2 L1 Output Method Y1-T2 open Automatic output reset PTC Thermistor Input L1 Open/closed L3 K8AK-TS (without 3-phase input) T1 Y1-T2 closed Manual output reset T2 Y1 No terminals Relay Output Common B Power Supply Voltage 100 to 240 VAC A1 11 12 A1 A2 14 24 VAC/DC A2 A1 A2 11 12 14 (No polarity) Note: 1. Terminal application depends on the model. 2. Do not connect anything to terminals that are shaded in gray. 3. The T1, T2, and Y1 terminals are not isolated from the three-phase voltage input (L1, L2, and L3), which carries a hazardous voltage (480 V max.). Use cables with reinforced insulation for wiring and connect a class II device (e.g., switch). Class II: Double or reinforced insulation is used to provide protection from electric shock, and a ground is not required. 4. Use the recommended ferrules if you use twisted wires. Wiring Example Wiring Examples K8AK-TS K8AK-PT 3-phase voltage A1 Power Note: There supply voltage A2 Motor L1 L2 L3 T1 T2 Y1 11 12 14 A1 A2 is no polarity for the DC voltage input. Note: There is no polarity for the DC voltage input. 4 Power supply AC/DC K8AK-TS/-PT Nomenclature Indicators Front K8AK-TS1 T1 T2 K8AK-PT1 Y1 L1 L2 L3 T1 T2 Y1 Terminal block (See notes 1 and 2.) PWR TEST/ RESET PWR Power indicator TEST/ RESET PH ALM TEST/RESET key Meaning Power indicator (PWR: Green) Alarm indicator Lit when power is being supplied. PH_ALM = Red Lit for phase loss on 3-phase input. Flashing for phase sequence on 3phase input. Lit in Test Mode. TS_ALM = Red Lit for error in PTC thermistor input. Lit in Test Mode. Keys Item TS ALM TS ALM Item Meaning Press with your finger to perform tests and resets. TEST/RESET key Alarm indicator Thermistor & 3P-Sequence, Loss Ry Thermistor Ry K8AK 11 12 A1 A2 K8AK TS1 14 Terminal block (See notes 1 and 2.) 11 12 A1 A2 PT1 14 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 8 mm max. For ferrules with an insulation sleeve. 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 Setting the Output Reset Method Use the Y1 and T2 terminals to set the output reset method. Y1-T2 Terminal Operation Y1-T2 terminals Output reset method Open Automatic reset Closed Manual reset TEST/RESET Key Operation Testing Automatic Output Reset If the key is pressed during normal status, the relay output and alarm indicator will go to error status but only while the key is held in. Manual Output Reset If the key is pressed during normal status, the relay output and alarm indicator will go to error status. Resetting Manual Output Reset If the key is pressed when the output and alarm indicator are in alarm status and the input is normal, the output and alarm indicator will return to normal status. PTC Thermistor Input Hysteresis There is hysteresis between the operating value and the reset value. If the input value exceeds the operating value and an error is detected, normal status is not restored until the input value goes below the reset value. However, if the input value is between the operating value and reset value and an error is being detected, normal status is restored if the control power supply is cycled. 5 K8AK-TS/-PT Timing Charts Automatic Output Reset (Y1-T2: Open) Manual Output Reset (Y1-T2: Closed) Power supply voltage Power supply voltage Error Error Three-phase Normal input error Three-phase Normal input error 3,100 3,100 PTC thermistor 1,650 input PTC thermistor 1,650 input 10 Not 10 Not TEST/RESET pressed. key TEST/RESET pressed. key Relay contacts (11-14) Relay contacts (11-14) PH_ALM PH_ALM TS_ALM TS_ALM t1: Power ON lock (0.6 s) t1 t1 Test Mode t1: Power ON lock (0.6 s) Using Y1-T2 as Remote Reset Terminals Power supply voltage Power supply voltage Three-phase input error Three-phase Normal input error 3,100 3,100 PTC thermistor 1,650 input PTC thermistor 1,650 input Y1-T2 closed.* Automatic output reset Y1-T2 closed.* Open Normal 10 10 Closed Manual output reset TEST/RESET key TEST/RESET key Relay contacts (11-14) Relay contacts (11-14) PH_ALM PH_ALM TS_ALM TS_ALM t1 t1: Power ON lock (0.6 s) t1: Power ON lock (0.6 s) t1 * Test Mode can be used during normal status. Error status is entered when the TEST/RESET key is pressed. The method to restore normal status is linked to the output reset method. * Output Reset Mode is entered when Y1-T1 closes. The latched error status is cleared. When Y1-T2 opens again, the initial status is restored. Note: 1. It requires 0.1 s for the contacts to switch after the input status is detected. This is not shown in the diagram. 2. There are two types of error detection for the three-phase input. The indicator behavior changes accordingly. Phase loss detected: PH_ALM lights. Phase sequence detected: PH_ALM flashes. If both a phase loss and phase sequence are detected at the same time, phase loss takes priority. Dimensions (Unit: mm) Thermistor Motor Protection Relays K8AK-TS1 K8AK-PT1 22.5 T1 PWR T2 100 22.5 Y1 TEST/ RESET L1 L2 L3 T1 T2 Y1 PWR TEST/ RESET PH ALM TS ALM TS ALM Thermistor Ry K8AK 11 12 A1 A2 TS1 14 K8AK-TS1 6 90 Thermistor & 3P-Sequence, Loss Ry K8AK 11 12 A1 A2 PT1 14 K8AK-PT1 72 5 K8AK-TS/-PT Questions and Answers Checking Operation PTC Thermistor Input Operation Operating Value The input resistance gradually increases from around 1 k. The operating value is the input value for which the alarm indicator (TS_ALM) lights. The contact outputs switch simultaneously so that you can confirm operation. Note: Refer to the timing charts for the operating methods for reference. Q Can phase loss be detected on the load side? In principle, phase loss cannot be detected on the load side because the K8AK-PT1 measures three-phase voltage to determine phase loss. Q Is it possible to detect phase losses for motor loads while the motor is operating? Phase loss can be detected while the motor is operating. However, the detection conditions depend on the load conditions that are shown in the following figure. Understand these characteristics when using this feature. 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 solid line in the graph shows the voltage that is induced at the motor terminals when a phase loss occurs while the motor is operating under various loads. The figure below shows how a phase loss that occurs while the motor is operating causes an imbalance in the voltage across each motor terminal. The K8AK-PT1 detects phase loss when the motor is operating when the voltage is unbalanced. (Detection occurs when the imbalance is 80% of the maximum phase). The K8AK-PT1 cannot detect phase loss with light motor loads because the voltage imbalance is too small. The detectable range is shown by the diagonal lines. Characteristic Curve Diagram Note: This characteristic curve shows the approximate values only. Voltage (as a percentage of rated voltage) Q 100 95 90 VST 85 80 VTR 75 70 Detectable area 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. 7 K8AK-TS/-PT 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. 8 K8AK-TS/-PT 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 * 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. Check terminal polarity when wiring and wire all connections correctly. The power supply terminals do not have polarity. 5. Do not wire the input and output terminals incorrectly. 6. Make sure the power supply voltage and loads are within the specifications and ratings for the product. 7. Make sure the crimp terminals for wiring are of the specified size. 8. Do not connect anything to terminals that are not being used. 9. Use a power supply that will reach the rated voltage within 1 second after the power is turned ON. 10.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. 11.Do not install the product near equipment that generates high frequencies or surges. 12.The product may cause incoming radio wave interference. Do not use the product near radio wave receivers. 13.Install an external switch or circuit breaker and label it clearly so that the operator can quickly turn OFF the power supply. 14.Make sure the indicators operate correctly. Depending on the application environment, the indicators may deteriorate prematurely and become difficult to see. 15.Do not use the product if it is accidentally dropped. The internal components may be damaged. 16.Be sure you understand the contents of this catalog and handle the product according to the instructions provided. 17.Do not install the product in any way that would place a load on it. 18.When discarding the product, properly dispose of it as industrial waste. 19.When using the product, remember that the power supply terminals carry a high voltage. 20.The product must be handled only by trained electrician. 21.Prior to operation, check the wiring before you supply power to the product. 22.Do not install the product immediately next to heat sources. 23.Perform periodic maintenance. Precautions for Correct Use Observe the following operating methods to prevent failure and malfunction. 1. Use the power supply voltage, input power, and other power supplies and converters with suitable capacities and rated outputs. 2. When cleaning the product, do not use thinners or solvents. Use commercial alcohol. 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. To use the product on the secondary side of an inverter, install a noise filter on the primary side of the inverter. Mounting and Removing * Mounting to DIN Track 1. Catch the upper hook on the DIN Track. 2. Push the product onto the Track until the hooks lock into place. A B * Removing from the DIN Track Pull down on the bottom hook with a flat-blade screwdriver and lift up on the product. Applicable DIN Tracks: PFP-100N (100 cm) PFP-50N (50 cm) 9 MEMO 10 Terms and Conditions of Sale 1. Offer; Acceptance. 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Printed on recycled paper. (c) 2014 Omron Electronics LLC Printed in U.S.A. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Omron: K8AK-PT1 100-240VAC