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Summary of Contents for AEMC GROUNDFLEX 6474
- Page 1 6474 GROUNDFLEX ADAPTER ® E N G L I S H User Manual ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
- Page 2 ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
- Page 3 Catalog #: ______________________________ Model #: 6474 Please fill in the appropriate date as indicated: Date Received: _________________________________ _______________________ Date Calibration Due: Chauvin Arnoux , Inc. ® d.b.a AEMC Instruments ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 4: Table Of Contents
3. SPECIFICATIONS................16 Electrical .....................16 3.2 Mechanical ..................18 Environmental ..................18 3.4 Safety ....................18 4. MAINTENANCE ................19 4.1 Maintenance..................19 4.2 Cleaning ...................19 Limited Warranty ....................21 Warranty Repairs ....................21 GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 5: Introduction
• NOTE: The potentials on the various rods used for an earth measurement may be different if a nearby electrical installation is defective or certain weather conditions prevail (thunderstorms). It is up to the operator to decide whether to continue or postpone measurements in these situations. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 6: International Electrical Symbols
1.2 Definition of Measurement Categories CAT II: For measurements performed on circuits directly connected to the electrical distribution system. Examples are measurements on household appliances or portable tools. CAT III: For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers. CAT IV: For measurements performed at the primary electrical supply (<1000V) such as on primary overcurrent protection devices, ripple control units, or meters. 1.3 Receiving Your Shipment Upon receiving your shipment, make sure that the contents are consistent with the packing list. Notify your distributor of any missing items. If the equipment appears to be damaged, file a claim immediately with the carrier and notify your distributor at once, giving a detailed description of any damage. Save the damaged packing container to substantiate your claim. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 7: Ordering Information
110/240V with power cord 115V US, two 500ft color-coded leads on spools (red/ blue), two 100ft color-coded leads (hand-tied, green/black), one 30ft lead (green), four T-shaped auxiliary ground electrodes, set of five spaded lugs, one 100ft AEMC tape ®... -
Page 8: Groundflex ® Adapter
® For Use with the MODEL 6474 Ground Tester Model 6472 1. Inputs 1 through 4 for GroundFlex sensors ® 2. Connector for connection lead to the Ground Tester Model 6472 OVERLOAD indicator 4. SENSOR TURNS selector: 1, 2, 3 or 4 5. SENSITIVITY selector: x10, x1 or x1/10 6. INPUT SELECTION: 1, 2, 3, 4, 1-2, 1-3 or 1-4 GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 9: Groundflex Sensor
The GroundFlex sensors are placed around a conductor (tower leg or pole) and ® closed using a screw connector, which is part of the sensor. This closed loop is then used to make a contact-free measurement of the current flowing in the conductor (leg) it is wrapped around. These sensors are current measurement clamps but are able to enclose objects that are much larger. GroundFlex sensors are available in lengths of up to approx 24ft (8m) and can ® be placed around objects (such as tower legs) up to in approx 8ft diameter (2.7m). GroundFlex ® Sensor 50V CAT IV To Model 6472 Overload INPUT 1-2-3 1-2-3-4 GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 10: Calibration Of Groundflex ® Sensors
This could cause errors. Start by identifying each sensor using the identification rings that are supplied with the Model 6474: (1) Brown (2) Red (3) Orange (4) Yellow • Connect the calibration loop between terminals H and E of the Model 6472. • Connect the Model 6472 and 6474 together using the connection cable. • Connect the GroundFlex sensor with the Brown ring to Input 1 of the Model ® 6474, the one with the Red ring to Input 2, the one with the Orange ring to Input 3, and the one with the Yellow ring to Input 4. • Coil the GroundFlex sensor four times around in the calibration loop and close ® it using its screw connector. Place the connector as far as possible from the calibration device. 6472 6474 GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 11 ® are different, the "CAL" symbol blinks to recommend a calibration. S x 1 AUTO NOTE: To avoid measurement errors, do not touch the GroundFlex sensor or ® the calibration loop during the calibration. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 12: Measurements In Auto Mode
Preparation of the GroundFlex Adapter ® The GroundFlex Adapter Model 6474 is designed to be used only with the Model ® 6472 device. The two instruments must be connected using the special connection cable supplied. The Model 6474 has no ON/OFF button, and is powered only by the Model 6472, via this connection cable. The Model 6474 is intended primarily to measure the current that flows through a high-voltage tower to the ground. You can wrap up to 4 legs of the towers each with a GroundFlex sensor and measure the current flowing to earth through each ® of the legs or through several legs. 1. Set the rotary function switch to GroundFlex on the Model 6472. ® When you connect the GroundFlex Adapter Model 6474 to the 6472, a self- ® test will begin. During this test, the OVERLOAD check light on the 6474 is lit. Connect the required number of sensors to channels 1, 2, 3, and/or 4. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 13 TURNS selection switch. NOTE: To increase measurement sensitivity, we recommend when possible, wrapping a maximum number of turns (up to 4) around the structure. Set the SENSITIVITY switch to the desired sensitivity: x1/10, x1, or x10. The choice of sensitivity depends on the expected current value. As a precaution, always start with the lowest sensitivity, x1/10, and increase it as needed. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 14: Making A Measurement (Resistance Of Legs)
(check arrow direction on the sensor) and they must all have the same number of turns. Sensors should encircle both leg AND ground system. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 15 S (Y) and ES (Xv) terminals of the tester. 1. Set the 3 switches (Inputs, Turns and Sensitivity) of the GroundFlex Adapter ® according to the connection made. Start the measurement by pressing the START/STOP button. S x 1 Ω AUTO To display the measurement parameters, press DISPLAY several times. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 16: Other Measurements
2.4 MANUAL Mode and SWEEP Mode Use the Hz/OPTIONS button and ► button to change to MANUAL mode. The following parameters can be modified: • 128Hz blinks Change the test frequency • Test voltage blinks Switch between 16 and 32V You can also perform a frequency sweep and a smoothing. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 17 L of 550µH for the link via the overhead ground conductor at the tip of the towers: Impedance of the towers Z (ohm) F (Hz) 1000 2000 3000 4000 5000 Measurement of a tower earth impedance with GroundFlex ® sensors Conventional 4 pole measurement Measurement into the top of a tower (iterative network impedance) GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 18: Specifications
±5% of Reading + 1ct @ 128Hz The intrinsic error specified refers to reference conditions with a test voltage of 32V, test frequency of 128Hz, R , and R = 1kΩ, no external voltage. The operating error for measurements of R and R is the same as that specified for 4-Pole earth resistance measurement. The operating error of AC resistance measurements can be less than that specified for voltage or current because frequency characteristics of the voltage channel are matched to those of the current channel. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 19 ± (10% + 2ct) ± (3% + 2ct) ± (3% + 2ct) 40 to 99.9 ± (10% + 2ct) ± (3% + 2ct) ± (20% + 2ct) GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 20: Mechanical
75 and 90% RH must be added to the operating error. 3.4 Safety Electromagnetic Compatibility This instrument satisfies the EMC and LVD directives required for the CE marking and product standard IEC 61326-1 (Ed. 97) + A1 (Ed. 98). • Immunity in industrial environment • Emissions in residential environment. Electrical safety according to EN 61010-1 (Ed. 2 of 2001) Measurement according to EN 61557 (Ed. 2 of 2007) parts 1, 4 and 5. CAT IV, 50V Pollution Degree 2 *Specifications are subject to change without notice GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... -
Page 21: Maintenance
Turn the instrument OFF and disconnect the unit from all circuits before opening the case. • Use specified spare parts only. Cleaning Disconnect the instrument from any source of electricity. Use a soft cloth lightly moistened with soapy water. Wipe with a moist cloth and then dry with a dry cloth. Never use alcohol, solvents or hydrocarbons. GroundFlex Adapter Model 6474 ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:... - Page 22 ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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Page 23: Limited Warranty
® For full and detailed warranty coverage, please read the Warranty Coverage Information, which is attached to the Warranty Registration Card (if enclosed) or is available at www.aemc.com. Please keep the Warranty Coverage Information with your records. What AEMC Instruments will do: ®... - Page 24 10/15 99-MAN 100326 v5 Chauvin Arnoux , Inc. d.b.a. AEMC Instruments ® ® ShopAEMC www. .com 1.877.766.5412 Shop for AEMC products online at:...
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