EQ - Moving Iron Panel Instruments

Hauptbild - EQ - Moving Iron Panel Instruments
Austausch der Skala bei Schalttafeleinbaugeräten und Messgeräten zur Hutschienenmontage - EQ - Moving Iron Panel Instruments
EQ -Ammeters and Voltmeters for AC Quantities
Properties
  • AC current and voltage measurement

  • Good readability

  • Exchangeable scale

  • High vibration and impact resistance

  • Terminal cover according to VGB 04 (option)

Description

The moving-iron instruments, or moving-iron meters, are designed for measuring rms values in AC voltage networks. The built-in moving-iron movement determines the r.m.s. value of the AC voltage in the frequency range from 15 to 100 Hz, regardless of the waveform.

Variants

EQ 45 45 mm for DIN rail mounting
EQ 48 48 x 48 mm for panel mounting
EQ 72 72 x 72 mm for panel mounting
EQ 96 96 x 96 mm for panel mounting
EQ 144 144 x 144 mm for panel mounting

Mechanical Design

The measuring mechanism consists of a current coil wound around a fixed iron and a moving iron mounted with the pointer on the system axis. The system is mounted on tip bearings and damping is provided by silicone oil. The beginning of the scale is compressed, which enables linear reading from approx. 15 % of the measuring range. Ammeters have a display range for twice the nominal current (100 % overload). The overload range of the scale is strongly compressed and has only a few scale lines. The accuracy class indicated in the toolbar basically refers only to the part of the nominal scale range marked by a start and end point. For voltmeters, the measuring range is continuous (without overload range). The special housing design allows a quick exchange of the interchangeable scale. This is particularly interesting for instruments that are to be connected to current or voltage transformers (xA/1A, xA/5A, xV/100V, xV/110 V).

Technical Data

Technical Data

Accuracy class

1.5 (according to EN 60 051)

Housing

Polycarbonate self-extinguishing, according to UL 94 V-0

Protection class

Housing IP 52
Terminals IP 00 (IP 20 for size 45)
according to 60529: 1989

Mounting position

vertical ± 5°

Self-consumption

Ammeter 0.3...1.2 VA
Voltmeter 1.5...4.0 VA

Environmental Conditions

Climate class

2 according to VDE/VDI 3540

Temperature

Reference range +18 ... +28°C
Working range -25 ... +55°C
Storage -40 ... +70°C

Relative humidity

≤ 80 % (without condensation)

Measuring Ranges

Ammeter

Nominal values [mA]

100 mA up to 800 mA

Nominal values [A]

1 A up to 100 A

Nominal values [A] - Current transformer

x A / 1 A     x A / 5 A

Voltmeter

Nominal values [V]

6 V up to 800 V

Nominal values [V] - Voltage transformer

x V / 100 V     x V / 110 V

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