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Ampere Meter > AC Ampere Meter

The types of operating principle of ammeter are the rectifier type and the moving iron type, and the rectifier type ammeter has a merit of measuring small current value compared with moving iron type ㆍTo deal with current exceeding 5A, use a 5A(1A) meter in combination with a C.T. ㆍA.C ammeter is used with a current transfomer externally mounted, and it is noted that primary current of a current transfomer and a full scale of the meter are identical when used. ㆍIf the circuit voltage exceeds 500V even when the current is less than 5A use a 5A(1A) meter in combination with a C.T to ensure insulation. ㆍThe scale range of ammeter for motor circuit is extended up to 150%~500% of rated current, so that these are proteced from the impact of the starting current and ensured of long life. ㆍAm expanded scale has the nirmal maximum reading(upper limit of effective measurement range) at the app. 65% point on the scale, and the rest of it(65%~100%) is devoted to extension reading.(tolerance of extension area : ±5%) 형 식 직결사용 CT 사용 최저측정치 최대측정치 최저측정치 최대측정치 rectifier type 100mA 30A * / 1A * / 5A iron type 30mA 30A * / 1A * / 5A Shape of case Type Rated Curr. Operating Princ Accur(%) Freq Berden(VA) Rectangular(60x60mm) D-60 AC DC 5A 50,60mV ±2.5 ±2.5 50~60Hz 1.0 50mV Drop Rectangular(60x80mm) D-68 AC DC 5A 50,60mV ±2.5 ±2.5 50~60Hz 1.0 50mV Drop Rectangular(80x60mm) D-80 AC DC 5A 50,60mV ±2.5 ±2.5 50~60Hz 1.0 50mV Drop Rectangular(100x83mm) D-100 AC DC 5A 50,60mV ±1.5 ±1.5 50~60Hz 1.0 50mV Drop Rectangular(80x80mm) Wide Angle D-800 AC DC 5A 50,60mV ±1.5 ±1.5 50~60Hz 1.0 50mV Drop Rectangular(110x110mm) Wide Angle D-110 AC DC 5A 50,60mV ±1.5 ±1.5 50~60Hz 1.0 50mV Drop Rectangular(70ø) D-70 AC DC 5A 50,60mV ±2.5 ±2.5 50~60Hz 1.0 50mV Drop Rectangular(72x72mm) D-200 AC DC 5A 50,60mV ±1.5 ±1.5 50~60Hz 1.0 50mV Drop Rectangular(98x98mm) D-300 AC DC 5A 50,60mV ±1.5 ±1.5 50~60Hz 1.0 50mV Drop