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Jewell DG Series – Moving Coil & Rectifier 90° Scale

The moving coil, rectifier meters, DG 48/72/96/144 are housed in molded polycarbonate cases and are suitable for the measurement of AC currents and voltages. Moving coil rectifier instruments measure average values and are calibrated to indicate RMS values, assuming a sinusoidal waveform for frequencies from 40 to 10000 Hz (AC current for frequency range of 40 to 1000 Hz and AC voltage for frequency range of 40 to 1000 Hz. These instruments offer several advantages in switchboards and generating set panels. A number of meters can be mounted in a panel cut-out (mosaic mounting). Front glass, bezel & dial can easily be replaced

Additional information

Features

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

Movement

Moving coil movement has pivots of very high hardness. Movement is suspended between spring-loaded sapphire jewels. Movement is properly shielded and critically damped by eddy currents induced in coil former.

Case Options

• Antiglare glass front fascia
• Red, yellow, blue, or white bezel color
• Front adjustable on-site red index pointer
• 15° to 165°C 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

Specifications

Mechanical

Case DetailsMolded square suitable for mounting in control switchgear panels and machinery consoles.
Case MaterialPolycarbonate, flame retardant, and drip-proof per UL 94-V-0
Front FasciaGlass
Color of BezelBlack
Position of UseVertical
Panel FixingMounting clamps
MountingStackable in a single cutout
Panel Thickness≤1.5mm
TerminalsVoltmeters & Ammeters <6A: Hexagon studs, M4 screws and wire clamps, E3 (DIN 46282).
Ammeters ≥6A: Threaded stud- M6 with nuts.

Electrical

Measured QuantityAC voltage or current
Overload CapacityAcc to IS: 1248/IEC 51
Continuously1.2 times rated voltage/current
Short Duration2 times rated voltage, 5 seconds maximum
10 times rated voltage, 5 seconds maximum
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 VoltageDG48: 660V
DG72 & DS96: 1000V
Proof VoltageDG48: 2kV
DG72 & DG96: 3kV
Insulation Resistance<50MΩ at 500 Vdc

Scale & Pointer

ModelDG48DG72DG96DG144
Scale Length41mm61mm97mm146mm
Scale CharacteristicsLinear*
Scale DivisionCoarse - Fine
Scale InterchangeabilityInterchangeable*
PointerKnife edge
Pointer Deflection0-90°

*Scale are nonlinear and not interchangeable for ammeters <750mA

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)

Applicable Standards

IS 2419
DIN IEC 61554
Nominal case and cutout dimensions for indicating electrical instruments
IS 1248Scale and pointer for electrical measuring instruments
IS 1248Connections and terminal markings for panel meters
DIN 46200
DIN 46282
Terminal bolts/leads
VDE 0110
VDE 0410
IEC 529
IEC 1010
Safety requirements and protective measures for electrical indicating 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
DIN 43701Technical conditions of delivery for electrical instruments
IS 1248/IEC 51
IS 9000
VDE 0411
IEC 1010
Mechanical strength (free-fall test, vibration test)

Downloads

Datasheet

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