DC/AC Current clamp 2000A A 1636 Instruction manual Version 1.2, Code no

Transcription

1 2000A Instruction manual Version 1.2, Code no

2 Distributor: Manufacturer: METREL d.d. Ljubljanska cesta Horjul Slovenia web site: METREL Mark on your equipment certifies that this equipment meets the requirements of the EU (European Union) concerning safety and electromagnetic compatibility regulations. No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL. 2

3 Table of contents 1 SYMBOLS AND WARNINGS DESCRIPTION OF CURRENT CLAMP OPERATION INSTRUCTIONS MAINTENANCE... 7 INSPECTION... 7 CLEANING... 7 SERVICE AND CALIBRATION TECHNICAL SPECIFICATIONS

4 1 Symbols and Warnings To ensure a high level of operator's safety during using of DC/AC current clamps the following warnings has to be considered: Do not apply around or remove from hazardous live conductors.! De-energize the installation on which the current is measured or adopt safe operating procedures when working on hazardous live installations, during application and removal of current clamps.! Do not use the current clamp if any damage is noticed!! Consider all generally known precautions in order to avoid risk of electric shock while dealing with electric installations!! Do not extend hands over safety barrier to prevent of electric shock! Only handles are allowed to be touched during measurement!! Symbol on the current clamp indicates the possibility of a hazardous live condition if the operator ignores the required safety measures.! If the current clamps are used in a manner not specified in this Instruction manual, the provided protection can be impaired!! Only a competent, authorized person is allowed to carry out service intervention!! Do not connect clamp output elsewhere than to Metrel PQ Analyzers (MI 2892, MI 2885, MI 2883). Current clamps are protected by double insulation. 4

5 2 Description of current clamp ETCR068AD Clamp AC/DC current Sensor is used for measurement of AC/DC current, phase, power energy, power, power factor. Adopt the latest CT technology. It is portable, large clamp design, no need to disconnect the measured circuits, non-contact, safe and fast. It can be connected with phase detection analyzer, industrial control equipment, data recorder, oscilloscope, harmonic analyzer, electric power quality analyzer, high precision digital multimeter, etc. Widely applied in electricity, communication, meteorology, railway, oilfield, construction, measurement, scientific and research teaching unit, industrial and mining enterprises. 5

6 3 Operation Instructions Adopt the combination of split coil and hall element, can use to measure AC current and DC current, when current Ⅰ go through the sensor, hall element will output a hall voltage V H, measure the hall voltage V H and calculate the current Ⅰ. Hall voltage V H is in proportion to current Ⅰ, and the output of sensor is: 1mV/1A, it means that when the input current is 1A, the ratio-metric voltage is1mv. 1. Clamp 2. Up cover 3. Trigger. (Open and close the clamp). 4.Indicate of positive input AC current 5.Power-on indication 6.Low voltage indication 7.ZERO clearing key 8.ON/OFF key, the switch of the power 9.Output wire (Red wire-positive signal output; Yellow-negative signal output) 10. Down cover. 11. Screws of up/down cover (3 screw, two of them are inside the cover) 12.Cover of battery 13.Screws of battery cover. 14.Output lead 6

7 4 Maintenance Inspection To maintain operator safety and ensure reliability of the current clamp it is good practice to inspect it on a regular basis. Check that the enclosure and optional connection are without defects such as scratches or breaks. Jaw surface must be clean. Pollution on jaw surfaces reduces the current clamp sensitivity. Cleaning Use a soft cloth moistened with soapy water or alcohol to clean non-metallic surface of the current clamps and leave them to dry totally before using it.! Do not use liquids based on petrol or hydrocarbons!! Do not spill cleaning liquid over the current clamps! To clean jaw cut surfaces use slightly oiled soft cloth. Service and Calibration It is essential that your clamp is regularly calibrated in order to guarantee the technical specification listed in this Instruction manual. We recommend 2-year calibration interval. Metrel encloses an original calibration certificate with every new instrument and clamp. For recalibration and repairs under or out of warranty time please contact your distributor for further information.! Only a competent, authorized person is allowed to carry out service intervention! 7

8 5 Technical Specifications Function Measurement of AC/DC current, phase, power energy, power, power factor Power supply Zn-Mn dry cell 6F22 9VDC (external power source is allowed) Rated current 15mA Test mode Clamp CT Clamp Size Φ68mm Range DC 0.0A~2000A; AC 0.0A~1000A Resolution 0.1A AC/DC Signal output 1 mv/1a Accuracy ±2.0%FS (50Hz/60Hz; 23 ±2, below 70%RH, keep the wire be in the center of clamp) Phase Error 3 (AC50Hz/60Hz; 23 ±2 ) Zero clearing Output connection Output Wire Length Measured Wire Position Current Frequency Voltage of circuit Voltage of battery Dimension Weight Working Environment Storage Environment Insulation Strength Safety Rules Press zero key is to clear the data, eliminate the effect of geomagnetic field to the measurement of AC current Standard connection: Red wire-positive output; Yellow wire-negative output. 2m Approximately in the geometric center of the clamp, the errors for deviating the center of the clamp increase 1.5%rdg. AC:45Hz-400Hz Below AC 600V When the voltage of battery declines to 7.2V, and the LED light will be on to indicate replace the battery. 224mmx115mmx43mm 515g -10 ~45 below 80%rh -10 ~60 ; below 70%rh AC 3700V/rms (between coil and shell) IEC1010-1, IEC , Pollution degree:2 CAT Ⅲ(600V) 8