Overview

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

Features

ㆍTo deal with a current exceeding 5A, use a 5A(1A) meter in combination with a C.T.

ㆍA.C ammeter is used with a current transformer externally mounted. The primary current of a current transformer 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 the motor circuit is extended up to 150%~500% of the rated current so that these are protected from the impact of the starting current and ensured of long life.

ㆍAm expanded scale has the app's Nirmal maximum reading(upper limit of effective measurement range). 65% point on the scale and the rest of it(65%~100%) is devoted to extension reading. (tolerance of extension area: ±5%)

Meter rating

형 식	직결사용		CT 사용
	최저측정치	최대측정치	최저측정치	최대측정치
rectifier type	100mA	30A	* / 1A	* / 5A
iron type	30mA	30A	* / 1A	* / 5A

Specification

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