Jewell DE Series – Moving Iron

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.

Additional information

Features

• Scale Interchangeability
• Near Linear Scale
• Glass-filled polycarbonate housing (UL 94-V-0)
• Knife-edge pointer
• Easily replicable glass and bezel

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
• Red, yellow, blue, or white bezel color
• Front adjustable on-site red index pointer
• 15° to 180° position of use available on request

Dial Options

• Blank dial with initial and end values marked
• Number or letter markings
• Basic divisions without numbering
• Red or green markings or bands
• 2, 3, and 5 times over range
• 6 times over range for ammeters

Specifications

Mechanical

Case DetailsMolded square suitable for mounting in control switchgear panels and machinery consoles.
Case materialPolycarbonate, flame retardant, and drop proof per UL 94-V-0
Front FasciaGlass
Color of BezelBlack
Position of UseVertical
Panel FixingMounting clamps
MountingStackable in a single cutout
Panel Thickness≤25mm
TerminalsVoltmeters & 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 QuantityAC voltage or current
Power ConsumptionVoltmeters: <4.5 VA
Ammeters <15A: <0.5 VA
Ammeters >15A: <0.8 VA
Overload CapacityAcc to IS: 1248/IEC 51
Continuously1.2 times rated voltage/current
SHORT DURATION
Voltmeters2 times for 0.5 seconds: 9 overloads
2 times for 5 seconds: 1 overloads
Ammeters10 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 ClassGroup A according to VDE 0110
Rated Insulation VoltageDS48: 660V
DS72 & DS96: 1KV
Proof VoltageDS48: 2KV
DS72 & DS96: 3KV
Insulation Resistance<50MΩ at 500 Vdc

Scale & Pointer

ModelDS96DS48DS72DS144
Scale Length97mm41mm63mm146mm
Scale CharacteristicsNear linear above 10% of nominal full scale value
Scale DivisionCoarse - Fine
PointerKnife edge
Pointer Deflection0-90°

Environmenal

Climatic SuitabilityClimate 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 Resistance15gn for pulse duration 11ms
Vibration Resistance10-55-10 Hz for amplification 0.15mm (1.5g at 50Hz)
Pollution Degree2

Applicable Standards

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 43718Front frames for indicating measuring instruments principle dimensions
UL 94-V-0UL combustibility class

European Compliances

2004/108/ECEMC directive
2006/95/ECLow voltage directive
Amendment 93/68/EECFor CE marking

Downloads

Datasheet

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