Ground Fault Relay K6EL CSM_K6EL_DS_E_9_3 Economical, Compact, High-performance, DIN 48 × 48-mm Ground Fault Relay for Low Voltages • Performs continuous monitoring and detection of ground faults in low-voltage circuits due to the deterioration of insulation in electrical devices. • Higher reliability ensured with improved resistance to high-frequency noise when used for inverter loads. • Ground Fault Relays and through-type ZCTs (zero-phase current transformers) are mutually compatible. • The through-type ZCTs are equipped with test terminals, allowing operation tests for Ground Fault Relays to be performed with ease. Model Number Structure ■ Model Number Legend K6EL-@@ 1 2 3 1. Ground Fault Relay 2. Operating Time and Reset Method None: 0.1 s manual reset A: 0.3/0.8 s (switchable) manual reset 3. Sensed Current 30: 30 mA (fixed) 100: 100 mA/200 mA (switchable) 200: 200 mA/500 mA (switchable) 500: 500 mA/1,000 mA (switchable) Ordering Information ■ List of Models Ground Fault Relays Type High-sensitivity models Sensed current Type 30 mA (fixed) Operating time Medium-sensitivity models 100 mA/200 mA (switchable) 200 mA/500 mA (switchable) 500 mA/1,000 mA (switchable) High-speed models Less than 0.1 s K6EL-30 K6EL-100 K6EL-200 K6EL-500 Delayed models 0.3/0.8 s (switchable) --- K6EL-A100 K6EL-A200 K6EL-A500 ZCTs (Zero-phase Current Transformers) Type Rated current Indoor through-type models Sensed current Model Indoor separate-type models Diameter of through-hole Model Diameter of through-hole 50 A OTG-L21 21 mm --- --- 100 A OTG-L30 30 mm --- --- 200 A OTG-L42 42 mm OTG-CN52 52 mm 400 A OTG-L68 68 mm OTG-CN77 77 mm 600 A OTG-L82 82 mm OTG-CN112 112 mm 1,000 A OTG-L156 156 mm --- --- 1 K6EL ■ Ground Fault Relay and ZCT Combinations (OK: Compatible) Ground Fault Relay K6EL-30 K6EL-100, -200, -500 K6EL-A100, -A200, -A500 ZCT OTG-L21 (50 A) OK OK OTG-L30 (100 A) OK OK OTG-L42 (200 A) OK OK OTG-L68 (400 A) --- OK OTG-L82 (600 A) --- OK OTG-L156 (1,000 A) --- OK OTG-CN52 (200 A) --- OK OTG-CN77 (400 A) --- OK OTG-CN112 (600 A) --- OK Note: 1. “OK” indicates groupings that can be combined freely. 2. Combinations with the OTG-LA@@ are also possible. ■ Options Flush Mounting Adapters Front Cover Model Model Y92F-30 Y92A-48B (Hard Cover) Y92F-71 Y92A-48D(Soft Cover) Note: The Front Cover can be attached when the Y92F-30 Adapter is used to mount the Ground Fault Relay to a panel. Specifications ■ Ground Fault Relay Ratings Item Type High-speed models Delayed models Control power supply 100/110 VAC or 200/220 VAC, 50/60 Hz (same for all) Rated current Depends on the ZCT Sensed current 50% to 100% of the rated sensed current Non-operating current 0% to 50% of the rated sensed current Rated short-time current 2,500 A Ground fault indication method LED (red) Test method Relay operation confirmed using a test button. (Independent of ZCT connection.) Reset method Manual Either press the reset button or turn the control power supply OFF and ON again. Built-in contacts Contact form SPDT+SPST-NO Carrying current 5A Rated load cosφ = 1 cosφ = 0.4 (L/R = 7 ms) 240 VAC 5A 2A 110 VDC 0.3 A 0.2 A 30 VDC 5A 3A Power (VA) consumption 3 VA max. Weight Approx. 110 g 2 K6EL ■ Ground Fault Relay Characteristics Item Type High-speed models Delayed models Operating time Less than 0.1 s 0.3 s/0.8 s (switchable) Inertial non-operating time --- 0.1 s when set to 0.3 s 0.5 s when set to 0.8 s Control power supply range 80% to 110% of the control power supply voltage Operating temperature −10 to 55 °C (with no icing) range Operating humidity range 45% to 85% (with no condensation) Insulation resistance 5 MΩ min. at 500 VDC (between charged parts and the mounting panel) Dielectric strength 1,500 VAC, 50/60 Hz for 1 min (between charged parts and the mounting panel) Lightning impulse dielectric strength 1.2/50 μs, 7,000 V (between control power supply terminals) Lightning impulse operation failure 1.2/50 μs, 7,000 V (primary side of ZCT) Vibration resistance Destruction: 16.7 Hz, 4-mm double amplitude for 1 min Shock resistance 98 m/s2 Note: The range for an operating time of 0.3 s is 0.15 to 0.45 s and the range for an operating time of 0.8 s is 0.6 to 1.2 s. ■ ZCT (Zero-phase Current Transformer) Item Structure Model Indoor through-type models OTG-L21 OTG-L30 OTG-L42 OTG-L68 Indoor separate-type models OTG-L82 OTG-L156 OTG-CN52 OTG-CN77 OTGCN112 Rated current 50 A 100 A 200 A 400 A 600 A 1,000 A 200 A 400 A 600 A Diameter of through-hole 21 mm 30 mm 42 mm 68 mm 82 mm 156 mm 52 mm 77 mm 112 mm Rated voltage 600 VAC max., 50/60 Hz, single-phase/three-phase Output terminal polarity None (The ZCT’s output terminals k and l can be connected to either input terminals 3 or 4 of the Relay.) (See note.) Insulation resistance 100 MΩ min. (between charged metal parts and ground) Dielectric strength 2,200 VAC, 50/60 Hz for 1 min (between charged metal parts and ground) Ambient operating temperature −10 to 60 °C (with no icing) Weight Approx. 90 g Approx. 130 g Approx. 230 g Approx. 480 g Approx. 700 g Approx. 6.6 kg Approx. 1.3 kg Approx. 2.5 kg Approx. 3.5 kg Note: Do not connect ZCT output terminals k and l to ground. Doing so may result in damage to the Relay. 3 K6EL Internal Block Diagram X/c 9 Delayed models only 8 Operating time selection switch 11 X/a Operating time setting circuit 6 Reset button 3 From OTG ZCT * Input protection circuit 4 Operating value setting circuit Sensitivity selection switch (not provided on the K6EL-30) Amplifier circuit 7 Switching circuit X Ground fault indicator (red) Test button Power supply circuit Shock-wave absorption circuit 2 1 Operation at 200/220 V Operation at 100/110 V 10 Power supply indicator (green) * Input from OTG does not have polarity. Nomenclature POWER LEAKED K6EL-A100 Power supply indicator (green) Ground fault indicator (red) EARTH LEAKAGE RELAY TEST RESET Reset button (black) Test button (red) SENSITIVITY Sensitivity selection switch (not provided on the K6EL-30) 100 mA 200 mA Operating time selection switch (delayed models only) 0.3S 0.8S OPERATING TIME Connections Ground Fault Relay (from Pin Side) Ground Fault Relay with P3GA-11 (from Terminal Side) 5 5 6 7 From ZCT 4 3 2 1 11 8 9 10 4 From ZCT 3 2 100 VAC 200 VAC From ZCT 6 7 8 9 1 11 10 100 VAC Control power supply 200 VAC Ground Fault Relay with P2CF-11 (from Terminal Side) 8 7 6 9 10 11 1 5 4 From ZCT 3 From ZCT 2 100 VAC 200 VAC Control power supply 4 K6EL Connection Examples Installation on the Electrical Path Molded case circuit-breaker Installation on a Ground Bus Bar Molded case circuit-breaker ZCT Transformer Load Load Transformer kt OTG ZCT Y/b lt k Y/b OTG ZCT Auxiliary relay kt l Y k l Auxiliary relay lt Y ZCT 5 6 7 4 8 3 9 2 10 1 11 Alarm buzzer BZ Alarm buzzer BZ 100/110 VAC K6EL Ground Fault Relay Ground bus bar K6EL Ground Fault Relay 5 6 7 4 8 3 9 2 10 1 11 200/220 VAC Do not, under any circumstances, connect the k and l lines to ground. Note: When not using the kt and lt terminals (test terminals), leave them unconnected. The Relay may not be able to attain its performance characteristics if used with the kt and lt terminals connected. 100/110 VAC 200/220 VAC Dimensions Note: All units are in millimeters unless otherwise indicated. Ground Fault Relay 1 78 6 63.7 0.7 13.6 44.8 × 44.8 48 Applicable Connecting Sockets P2CF-11 Front Connecting Socket P3GA-11 Back Connecting Socket PL11 Back Connecting Socket 48 5 K6EL Dimensions with Adapter Mounted Y92F-30 Flush Mounting Adapter (Sold Separately) Panel 15 Mounting Hole Cutout Dimensions P3GA-11 Back Connecting Socket R0.5 max. 58 45 +0.5 0 45 +0.5 0 Note: Recommended panel thickness: 1 to 3.2 mm. 48 7 91.4 Panel Y92F-71 Flush Mounting Adapter (Sold Separately) 56 Mounting Hole Cutout Dimensions P3GA-11 Back Connecting Socket R0.5 max. 45±0.2 58 68 45 +0.5 0 55 +0.5 0 91.4 45±0.2 Note: Recommended panel thickness: 1 to 3.2 mm. 50±0.2 Dimensions for Socket Mounting Y92F-30 P3GA-11 K6EL + Adapter K6EL 103 77 Y92H-1 Hook K6EL 91.4 7 P2CF-11 (sold separately) 16 PL11 (sold separately) (sold separately) Note: The same dimensions apply when using the Y92F-71 Adapter. Connecting Sockets P2CF-11 Front Connecting Socket Eleven, M3.5×7.5 sems screws 3 4.5 7.8 Terminal Arrangement (Top View) Mounting Holes Two, 4.5-dia. holes 8 7 6 5 4 70 max. 40±0.2 35.4 Two, 4.5-dia. holes 9 3 10 11 1 2 4 50 max. 31.2 max. P3GA-11 Back Connecting Socket 27 dia. Terminal Arrangement (Top View) 45 25.6 5 6 7 8 4 3 9 2 1 11 10 45 4.5 16.3 6.2 6 K6EL PL11 Back Connecting Socket 4 3.5 1 Terminal Arrangement (Bottom View) Two, 3.5-dia. holes or two, M3 socket mounting holes 5 6 7 30 dia. 51 max. 40 4 3 2 3.9 1 11 Two, 2-dia. holes 35 max. Mounting Holes 8 9 10 31 dia. holes 40±0.3 Approx. 20.5 Front Cover Model Y92A-48B (Hard Cover) Y92A-48D (Soft Cover) ZCT 9.3 Indoor Through-type Models OTG-L21 (50 A) M4 terminal screws 13.5 11 50 20 17 Mounting Hole Cutout Dimensions Terminal symbols (protrude 0.3 mm) kt k l Nameplate lt Label and caution 68.5 6 Two, 5.5-dia. holes or two, M5 screw holes 64 74 21 dia. 5.2 20 64 OTG-L30 (100 A) 9.3 M4 terminal screws 11 63 54 50 20 13.5 17 Mounting Hole Cutout Dimensions Terminal symbols (protrude 0.3 mm) kt k l lt Nameplate Two, 5.5-dia. holes or two, M5 screw holes 81.5 76 6 86 30 dia. 5.2 20 76 OTG-L42 (200 A) 11 9.3 5.2 Mounting Hole Cutout Dimensions 17 88 42 dia. Two, 5-dia. holes or two, M4 screw holes 109 97 97 (mounting pitch) 107 OTG-L68 (400 A) 25 11 9.3 6.1 17 118 Mounting Hole Cutout Dimensions 68 dia. Two, 5-dia. holes or two, M4 screw holes 136 131 13 (mounting pitch) 143 31 7 K6EL 11 OTG-L82 (600 A) 9.3 6.2 138 17 Mounting Hole Cutout Dimensions 82 dia. Two, 5-dia. holes or two, M4 screw holes 158 160 28 160 (mounting pitch) 172 OTG-L156 (1,000 A) 33 156 dia. L M5 terminal screws Mounting Hole Cutout Dimensions 263 Four, 8.5-dia. holes or four, M8 screw holes 138 90 230 270 3.2 60 230 9 90 130 20 40 Indoor Separate-type Models OTG-CN52 (200 A) 52 dia. K M4 terminal screws Mounting Hole Cutout Dimensions Two, 6.5-dia. holes or two, M6 screw holes 141 K 79 170 170 30 7 200 8 K6EL OTG-CN77 (400 A) 77 dia. M4 terminal screws K Mounting Hole Cutout Dimensions 157 Four, 6.5-dia. holes or four, M6 screw holes 84 K 53 195 195 70 53 7 230 112 dia. OTG-CN112 (600 A) K M4 terminal screws Mounting Hole Cutout Dimensions Four, 6.5-dia. holes or four, M6 screw holes 200 107 K 53 225 225 70 53 7 260 ■ Maximum Wire Sizes for ZCTs Wire/cable Model Rated current 600-V vinyl-insulated wire (IV) Through-hole diameter 2-wire Cable (VVR) 3-wire 2-wire OTG-L21 50 A 21 dia. 22 mm2 14 mm2 OTG-L30 100 A 30 dia. 2 2 OTG-L42 200 A 42 dia. 100 mm OTG-L68 400 A 68 dia. 400 mm2 325 mm2 325 mm2 OTG-L82 600 A 82 dia. 500 mm2 500 mm2 400 mm2 OTG-L156 1,000 A 156 dia. 500 mm 2 500 mm 2 OTG-CN52 200 A 52 dia. 200 mm 2 200 mm 2 OTG-CN77 400 A 77 dia. 500 mm 2 400 mm 2 OTG-CN112 600 A 112 dia. 500 mm2 60 mm 38 mm 2 100 mm 8 mm2 38 mm 2 500 mm2 3-wire 5.5 mm2 2 100 mm 38 mm2 2 1,000 mm 60 mm2 250 mm2 400 mm2 2 1,000 mm2 150 mm 2 100 mm2 400 mm 2 325 mm2 1,000 mm2 1,000 mm2 9 K6EL Test Circuit Switch 200 mA: 500 Ω, 50 W 500 mA: 200 Ω, 100 W 1,000 mA: 100 Ω, 200 W 100 VAC Slidac mA Ammeter K6EL kt k l lt OTC R Select the resistance R shown in the test circuit diagram according to the K6EL’s rated sensed current. Change the current using the slidac and ascertain the K6EL’s operating value each time by reading the ammeter. For example, R could take the values shown below: 30 mA: 3.3 kΩ, 6 W 100 mA: 1 kΩ, 20 W Safety Precautions ■ Correct Use Switching the Operating Time Installation and Wiring • Do not, under any circumstances, connect the ZCT’s output terminals k and l to ground. Doing so may result in damage to the Relay’s internal circuits. • Pass the primary conductor through the ZCT once. • The Relay detects ground faults in internal wiring of devices due to insulation deterioration and so install the ZCT as close to the power supply side as possible. 1. With the K6EL-A100, A200, and A500, the operating time can be switched using a flat-bladed screwdriver. 2. The operating time for the K6EL-30, 100, 200, and 500 is fixed and hence cannot be switched. ZCT Installation • Install the ZCT at an outdoor cable inlet or on a ground bus bar at a location allowing easy inspection. • When installing on the electrical path, use a ZCT with a value greater than the electrical path’s rated current. • If the secondary lines run in parallel to a circuit carrying a large current, either separate the lines as far as possible or use a shield line. Run the secondary lines close to each other. Sensed current selection switch Operating time selection switch Testing ZCT K6EL Primary conductor Separate by 20 cm min. Circuit carrying large current • When installing a separate-type ZCT with current flowing along the primary conductors, short the secondary terminals using clips or some other method. • If the ground fault indicator (red) lights when the Relay’s test button is pressed, it means that the internal circuits are operating normally. • To make an overall test, run a simulated ground fault current. Resetting • Once the relay models operate, it continues to operate until it is reset. Reset it either by pressing the reset button (black) or by turning the control power supply OFF and ON again. Switching the Sensed Current 1. With the [email protected], 200, and 500 the sensed current can be switched using a flat-bladed screwdriver. 2. The sensed current for the K6EL-30 is fixed and hence cannot be switched. 10 K6EL Q&A Q: How does the K6EL operate when used for inverter loads (e.g., inverter motors and inverter air conditioners)? A: High-frequency noise may cause unnecessary operation. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. In the interest of product improvement, specifications are subject to change without notice. 11 Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. 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It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to confirm actual specifications of purchased Product. Errors and Omissions. 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. 2016.4 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2016 All Right Reserved.