The moving iron panel meters, DE 48/72/96/144 housed in cases made of molded polycarbonate are suitable for the measurement of AC currents for the frequency range of 15 to 400 Hz and voltages in the frequency range of 15 to 100Hz. Moving iron meters indicate RMS values practically independent of waveform even of high harmonics. An error of indication may occur for extreme waveforms (e.g. phase gating controls) & for frequencies above 100KHz.
These meters offer several advantages in switchboards and generating set panels. A number of meters can be mounted in a panel cutout mosaic mounting. For CT-operated ammeters, dials can be fitted based on CT ratio. Glass and bezel can easily be replaced.
| Features | • Scale Interchangeability |
|---|---|
| Movement | Moving iron movement has pivots of very high hardness. Movement is suspended between a spring-loaded sapphire jewel and a silicon jewel. Movement is critically damped by the use of silicon oil. |
| Case Options | • Antiglare glass front fascia |
| Dial Options | • Blank dial with initial and end values marked |
Mechanical
| Case Details | Molded square suitable for mounting in control switchgear panels and machinery consoles. |
| Case material | Polycarbonate, flame retardant, and drop proof per UL 94-V-0 |
| Front Fascia | Glass |
| Color of Bezel | Black |
| Position of Use | Vertical |
| Panel Fixing | Mounting clamps |
| Mounting | Stackable in a single cutout |
| Panel Thickness | ≤25mm |
| Terminals | Voltmeters & Ammeters <30A: Hexagon studs - M4, screws and wire clamps, E3. Ammeters >30A: Threaded stud- M6 with nuts. Ammeters >60A: Threaded studs - M8 with nuts. |
Electrical
| Measured Quantity | AC voltage or current |
| Power Consumption | Voltmeters: <4.5 VA Ammeters <15A: <0.5 VA Ammeters >15A: <0.8 VA |
| Overload Capacity | Acc to IS: 1248/IEC 51 |
| Continuously | 1.2 times rated voltage/current |
| SHORT DURATION | |
| Voltmeters | 2 times for 0.5 seconds: 9 overloads 2 times for 5 seconds: 1 overloads |
| Ammeters | 10 times for 0.5 seconds: 9 overloads 10 times for 5 seconds: 1 overloads |
| Enclosure Code (IEC 529) | IP 52 - case cover IP00 - terminals without back cover IP20 - terminals with back cover |
| Insulation Class | Group A according to VDE 0110 |
| Rated Insulation Voltage | DS48: 660V DS72 & DS96: 1KV |
| Proof Voltage | DS48: 2KV DS72 & DS96: 3KV |
| Insulation Resistance | <50MΩ at 500 Vdc |
Scale & Pointer
| Model | DS96 | DS48 | DS72 | DS144 |
| Scale Length | 97mm | 41mm | 63mm | 146mm |
| Scale Characteristics | Near linear above 10% of nominal full scale value | |||
| Scale Division | Coarse - Fine | |||
| Pointer | Knife edge | |||
| Pointer Deflection | 0-90° | |||
Environmenal
| Climatic Suitability | Climate category II as per IS:1248, IEC 60051 Climatic class III according to VDE/VDI 3540 |
| Operating Temperature | -10° to +55°C |
| Storage Temperature | -25° to +65°C |
| Relative Humidity | ≥75% annual average, non-condensing |
| Shock Resistance | 15gn for pulse duration 11ms |
| Vibration Resistance | 10-55-10 Hz for amplification 0.15mm (1.5g at 50Hz) |
| Pollution Degree | 2 |
| IS 2419 DIN IEC 61554 | Nominal case and cutout dimensions for indicating electrical instruments |
| IS 1248 DIN 43802 | Scale and pointer for electrical measuring instruments |
| IS 1248 DIN 43807 | Connections and terminal markings for panel meters |
| DIN 46200 DIN 46282 | Terminal bolts/leads |
| IS 9249 DIN 40050 | Safety requirements and protective measures for electrical indicating. |
| VDE 0110 VDE 0410 IEC 529 IEC 1010 | Instruments and their accessories. |
| IS 1248 IEC 51/DIN EN 60051 DIN 43701 | Performance specifications for direct acting indicating analog electrical measuring instruments and their accessories. |
| IS 1248 IS 9000 VDE/VDI 3540 | Environmental condition |
| DIN 43718 | Front frames for indicating measuring instruments principle dimensions |
| UL 94-V-0 | UL combustibility class |
European Compliances
| 2004/108/EC | EMC directive |
| 2006/95/EC | Low voltage directive |
| Amendment 93/68/EEC | For CE marking |
| Datasheet |
