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Wire-wound Rheostats, Hand Sliding Type |
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1) Core
Porcelain Tube, Non-Magnetic Non-Inductive Tubular Type.
Diameter and Length of coreis given in the table below.
2) Contact Block : Squire piece made of material is
fitted with contact sliders in the guide squir rod.
Bright chrome plated Phosphor bronze strip which makes
immediate contact with the guide rod. A backlite knob is
fitted with squire piece for sliding up and down.
3) Guide Rod : Solid draven brass rod bright chrome
plated squire.
4) Contact Material : Multiple brushes of Phosphors
bronze strip rolled strip give springy action to the
contacts.
Winding Wires : Eureka wire for low value and
nichrom wire 80/20 grade for higher values.
Temperature rise : 200oC above ambient
temperature
High Voltage Test : 2 KV A.C. for 1 minute
between end support and any one of 3 wires terminals of
the wire.
End supports : Aluminium brackets painted.
Terminals : Bright Chrome plated brass nuts and
screws one at each end of Leaneer Type Wire-Wound
Resistor and the third one at both the side of
guide rod.
All Electrical Connectors are made from chrome plated
brass material.
Rotary Sliding Rheostate, Double tube and Multiple
Tubes, Non-Standard values, wattage on specific request,
Available from 100 Ma to 100 Amps 0.3 ohms to 25 Kohms. |
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4 Tubes Ganged Rheostat with
screw & knob 10 kw and above |
Double Tube Rheostats |
Rheostats |
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"RITEOHMS"
WIRE WOUND RESISTORS
The 'RITEOHMS' RESISTORS are Manufactured after Research
and planned development, Modern Manufacturing
Techniques, Use of HIGH STANDARD Materials Quality
Control. Proper Testing, Perfect design and process
under the control of qualified and Technically well
experienced hands.
'RITEOHMS' WIRE WOUND TUBULAR SILICON COATED RESISTORS
FEATURES :
Spot Welded Joints for reliability, Low temperature
co-efficient, Low Surface temperature, Brackets
available for Horizontal as well as vertical mountings,
Exceptional Stability & Performance.
SPECIFICATION :
Ohmic Range 0.01 to 500K ohms. Tolerance ± 0.5%, 1%, 5%
and 10%, Power Rating 0.5 W to 5000 W.
WIRE & WINDING :
Highest grade Nickel-chrome and copper Nickel Alloy
wires are used Mechanically uniform, tension and
required spacing. Single, Double Multiple Grade and
Non-Inductive.
¡
TYPE OF RESISTORS
¡
Tubular Resistors
¡
Edge Wound Resistors
¡
Non-Inductive Resistors
¡
Ceramic Encased
¡
Fibre Card Resistors
¡
Mica Resistors
¡
Mat Resistors
RATING CONTINUOUS DUTY :
The rating given for each type of Resistor are based on
a continuous duty service in free air and should be
regarded as value for a single resistor mounted
vertically in these conditions there will be a
temperature rise of 300oC for Vitreous
enameled and 200oC for silicon coated
resistors.
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Wire-wound
Resistors |
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MOTOR STARTING RESISTORS
TYPICAL RESISTANCE VALUES TOLERANCE ±10%
CONTINUOUS CURRENT RATINGS AT 2800C
TEMPERATURE RISE |
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OHMS |
0.5 |
0.6 |
0.75 |
1 |
1.3 |
1.7 |
2.2 |
2.8 |
3.5 |
4 |
5 |
6.5 |
9 |
13 |
16 |
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AMPS |
28 |
24 |
20 |
16 |
16 |
14 |
11 |
11 |
9 |
9 |
8 |
6.5 |
5 |
3.8 |
3.2 |
CONSTRUCTION:
HIGH THERMAL CAPACITY GROOVED CERAMIC FORMER
OPEN TYPE WINDING
SELF LOCKING
ROBUST TERMINALS
PHOSPHORUS BRONZE ADJUSTABLE BANDS.
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Load Bank :
Assembly of Resistors mounted in aircooled enclosure
with Switches and terminals. |
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Load Bank |
Load Bank |
Load Bank |
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Aluminium housed Resistor :
"Heat Sink type" manufactured in range of 5 watt to 250
watt.
* Non standard valves also
manufactured as per customers request.
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DYNAMIC BRAKING RESISTORS
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(STAINLESS STEEL GRID RESISTANCE) |
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Continuous rating
current |
ohms |
Continuous rating
current |
ohms |
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11 AMPS |
2.00 |
55 AMPS |
0.100 |
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14 AMPS |
1.00 |
62 AMPS |
0.080 |
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14 AMPS |
0.750 |
80 AMP |
0.050 |
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20 AMPS |
0.560 |
92 AMPS |
0.035 |
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27 AMPS |
0.370 |
106 AMPS |
0.025 |
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37 AMPS |
0.250 |
121 AMPS |
0.018 |
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45 AMPS |
0.150 |
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“ROHMS”
Resistors type 'SS' are Manufactured from
Stainless Steel (AISI 304) having temperature
co-efficient of 0.094% per degC, wire formed
grids, making them rustless, unbreakable and
light in weight. there is provision at each grid
to have a tapping, so that resistance value
between steps could be altered. The required no
of grids are put in series to get the required
ohmic values. The assembly is supported of mica
insulated steel rods with mica
washers thus forming a stack. This stack of grid
resistor can be mounted on a panel or steel rod is
bolted to the two sides.
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ALLUMINUM HOUSED
(BRAKING RESISTOR) |
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specification
1 Power Ratings
Upto to 1200 Watts in Single Module.
2Ohmic Value
0.1Ω to 10KΩ
3Ohmic Tolerance
Standard ±5%. Closer Tolerances Available.
4Temprature Co-efficient
±50ppm/ºC to ±200ppm/ºC |
5Dielectric Strength
2kV a.c. for 1 Minute
6Insulation Resistance
>2000MΩ at 500V a.c.
7Overload
5X for 5 seconds |
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features
¡
1High
Power to Size Ratio.
¡
2Specially designed for DBR applications.& other uses.
¡
3Excellent short term overload capacity.
¡
4Small
and Sleek design. Can easily be mounted in conjusted
control panels.
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5High
Temperature Resisting Hard Anodising Aluminium Housing.
¡
6High
power ratings can be achieved by multiplying individual
resistors to form DBR banks.
¡
7NON-INDUCTIVE types available. |
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Lead Screw Motion With Handle (4 Tubes
Ganged Rheostat lsm Type) |
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Rotary Type Rheostat with Knob (Lead Screw
Motion) |
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3 Phase Loading Rheostat |
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Battery Testing Load Bank (Battery Discharge Resistor
Panel)
At 48 volt dc current
rating 300 amps down to 5 amps can be set provided with
toggle switches for selection of load with volt & amp
meter with terminals
Cooling is provided by forced air indoor installation.
Similar load banks are manufactured as per different
ampere rating. |
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