CATEGORY Electrical Appliance Test Equip / High Pot/ Ratiometer MAIN MENU ....................................... |
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Catalog:Electrical Appliance Test Equip / High Pot/ Ratiometer 
AEMC Digital Transformer Ratiometer Model DTR-8500 AEMC Digital Transformer Ratiometer Model DTR-8500 The New DTR ÒModel 8500 from AEMCÒ Instruments is a portable digital transformer ratiometer designed for on-site testing of power, potential and current transformers.When connected to a non-energized transformer, the DTR ÒModel 8500 accurately measures primary to secondary turns ratio, while simultaneously displaying polarity and excitation current. The DTRÒ is fullyautomatic anduses an ANSI/IEEE compliant test method. No user calibration,range selection,hand cranking or tedious balancing is required. At each measurement, the DTRÒ automatically self calibrates and checks for openwindings/connections/circuit breakers, short circuits (excess excitationcurrent), incorrect test lead placement, and reverse polarity. Measurements are displayed quickly and accurately. The DTR ÒModel 8500 is designed with operator safety in mind. Tests are performed at low voltage and,unlike otherratiometers,step down excitation is employed.This method,inconjunction with an integral H/X reverse protection circuit, guards against the generation of hazardous test voltages normally associated with transformer ratio measurement instruments. A large,dual line alphanumeric LCD display with adjustable contrast andbacklight guarantees day/night readability.Power is supplied by integral NiCdbattery(included)or by ACline.Batteries are charged automatically during ACoperation. Both rugged and reliable,the DTRÒModel 8500 is built into an attractive, sealed structural polypropylene case designed to withstand the rigors of utility and industrialfield use. Constructedusing only the highest qualityelectrical and mechanicalcomponents,the DTRÒModel8500 sets the standard in advanced design, engineering andworkmanship,and it will provide the user with years of accurate and reliable measurements. Electrical Specifications Ratio Range: Autoranging,0.8000 to 1500.0:1 Accuracy * :Ratio <=1000 to 1:±0.1% of Reading Ratio >1000 to 1:±0.2% of Reading Excitation Signal: PT/VTMode: 44 Vrms maximum CT Mode: 0 - 1 A Auto Level, 0.1-5 Vr m s Excitation Current Display: Range:0 -1000 mA Accuracy : 2% R± 2 mA Excitation Frequency:70 Hz Display:LCD Character, 20 x2, large format, LEDbacklight, day/night visible Measurement Method: In accordance with ANSI/IEEE C57.12.90 Power Supply: Dual operation; rechargeable NiCd battery and 115/230 V, 50/60 Hz line supply. DTR ®Model 8500 maybe changed from 115/230 V by internal switch atany time. Units are available with factory presettings of 115 V or 230V. Batteries: 12 V, 5 x2 NiCd packs, 1300 mAH, Panasonic P-130SCR or equivalent Battery Life: Up to 10 hrs. continuous operation, DTR®Model8500 maybe used while recharging Charging Time:14 hrs. typical, C/10 rate Low Battery Indication:LCD display Line Fuse:115 V: 1.0A, 5 x 20mm, slow acting 230 V: 0.5A, 5 x 20mm, slow acting Displayed Measurements: Turns ratio RMS excitation current Polarity Displayed Messages: Incorrect Lead Connections H/X Reversal (accidental step-up misconnection) Short (excess excitation current) · Open Circuits Circuit Continuity LowBattery * 23º C ± 5º C, 50-70%RH, full battery charge, no external fields or noise. MADE IN USA Mechanical Specifications Connections: CannonÒXLR connectors and large colorcoded industrial clips Leads:15 ft, H& X color coded, in carrying bag Display: Dualline alphanumeric 3.875 x .875" with contrast adjustment and backlight Operating Temperature:0ºto 50ºC (32º to 122ºF), 0 to 90% RH (without condensation) Case:Heavy duty structural polypropylene (yellow) Dimensions:13 x 12 x6" (330 x305 x 152 mm) Weight:14 lb (6.4 Kg) Choice of Factory pre set voltages 115 or 230V input settimngs Accessories b. Cat-2118.47 Test Lead 30' in carrying bag c. Cat-2118.48 replacement leads 15' Model 1. 8500 Cat 2111.80 factory preset 115V 2. 8500 Cat 2116.21 factory preset 230V Please select
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