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MOVING IRON AMMETERS & VOLTMETERS (SLIDE I SCALE)
Panel Meter,Transformer,Voltage Regulator/ stabilizer,Rectifier,Transducer,Break down tester,Test Bench,Relay test kit,Energy saver,Test measuring instruments
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DESCRIPTION

Moving Iron Instruments are protected from damage or breakage under adverse condition due to its spring loaded jewel & pivot system. These Instruments are free from external magnetic field influences because of magnetic shielding & are 'CE' certified. These instruments have a very efficient oil damping system, which gives almost a deadbeat movement to the pointer, without irksome oscillation. The movement is light yet sturdy and has a large torque to weight ratio which assures long life to instruments.

These indicate true RMS values practically independent of waveform even of high harmonics. The scale is compressed initially. Readability starts from 10 to 15 degree approximately.


FEATURES
Scale Non-linear.
Suppression Initial suppression for Voltmeter & End suppression upto 6 times for Ammeter. (on request)
Scale Colour Special colour scales and marks for different ranges, (on request).
Housing Engineering plastic.
Terminal Protection Shrouded terminals to protect from accident, (on request).
Glass Anti - glare. (on request)

ELECTRICAL SPECIFICATIONS
TYPE Moving Iron Slide In Scale.
OPERATING VOLTAGE
(For Voltmeter)
Burden
15V to 600V.
100V / 110V for PT secondary.
15V to 30V - <100mA, 50V to 100V - < 30mA, 110V to 200V - <15mA,
200V to 600V - <7.5mA.
OPERATING CURRENT
(For Ammeter)
Burden
1 A to100A in 72x72, 1A to 200A in 96x96
1A / 5A for CT secondary.
0.25A to 30A - < 1VA, Above 30A - < 1.5 VA.
FREQUENCY 45 ~ 65Hz. (400Hz. on request).
ACCURACY Class 1.5
DIELECTRIC TEST 2kV RMS or 1 minute.
OVERLOAD CONTINUOUS 1.2 times
OVERLOAD SHORT TIME 2 times VN / 10 times IN for 5 seconds.
OPERATING TEMP. -10C to 55C
STORAGE TEMP. -20C to 70C
HUMIDITY upto 95% RH
CONFORMS TO I.S. 1248 / I.E.C. 60051 (Part 2).

MECHANICAL SPECIFICATIONS
MODEL SMI 72 (Slide in) SMI 96 (Slide in)
SIZE ( mm ) 72 x 72 x 60 96 x 96 x 60
PANEL CUTOUT ( mm ) 68 x 68 +0.7 92 x 92 +0.8
SCALE LENGTH ( Appro. mm ) 60 90
WEIGHT ( Appro. gms. ) <145 For 72 SQ Amps
<180 For 72 SQ Volts
<200 For 96 SQ Amps
<230 For 96 SQ Volts

Note : METERS ARE ALSO AVAILABLE IN 48x48x45 (SMI 48) & 144x144x60 (SMI 144) IN NON SLIDE IN DIAL VERSION.

MODEL SMI 48 SMI 144
SIZE (mm) 48 x 48 x 45 144 x 144 x 50
PANEL CUTOUT (mm) 45 x 45 +0.6 138 x 138 +1.0
SCALE LENGTH (Appro. mm.) 40 145
WEIGHT (Appro. gms.) 100 400

Ordering information
1) Type 2) Model 3) Operating Voltage & PTR Voltmeter 4) Operating Current & CTR For Ammeter.
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