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Oil / Winding Temperature Indicator
SCIENTIFIC CONTROLS Mechanical Instruments are incorporates proven design features acquired from many years of experience in providing Temperature Indicators/Controllers for Power & Distribution Transformers.
Oil Temperature Indicator
: The Oil Temperature Indicator (OTI) measures the Top
oil Temperature. It is used for control and protection for all
transformers.
Winding Temperature Indicator : The Winding is the component with highest temperature within the transformer and, above all, the one subject to the fastest temperature increase as the load increases. Thus to have total control of the temperature parameter within transformer, the temperature of the winding as well as top oil, must be measured. An indirect system is used to measure winding temperature, since it is dangerous to place a sensor close to winding due to the high voltage. The indirect measurement is done by means of a Built-in Thermal Image.
Winding Temperature Indicator is equipped with a specially designed Heater which is placed around the operating bellows through which passes a current proportional to the current passing through the transformer winding subject to a given load. Winding Temperature is measured by connecting the CT Secondary of the Transformer through a shunt resistor inside the Winding Temperature Indicator to the Heater Coil around the operating Bellows. It is possible to adjust gradient by means of Shunt Resistor.
In this way the value of the winding temperature indicated by the instrument will be equal to the one planned by the transformer manufacturer for a given transformer load.
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Model No. : 2002 | Model No. : 2003
Model No. : 2002
This is a high performance micro switch instrument with +/- 2°C accuracy. capable of temperature monitoring, indication & control, for the protection of Transformers from 1 MVA to 10 MVA rating.
| Technical Data | ||
| Dial Diameter | : | 118 mm Segment Dial |
| Angular Sweep | : | 60° |
| Range | : | 0-120°C, 0-150°C, 20-140°C & 30-150°C |
| Accuracy | : | +/-2°C |
| Graduations | : | 2°C per division |
| Electrical Connections | ||
All line to body(Earth) High Voltage Breakdown Tested |
: | 2.5 KV AC, 50Hz for 60 seconds |
| Terminal Type | : | WAGO Terminals Press Fit Type |
| Switch Configurations | ||
Max.No. of Switches |
: | 4 |
| Switch Type | : | Dry electrode mercury in glass |
| Switch Rating | : | 5A AC/DC at 250V |
| Switches | : | Normally Open Type |
| Adjustable Range | : | 10-90% of Full Scale Range |
| Switch Differential | : | 6-90°C (Close to Open & Vice Versa) |
| Switch Accuracy | : | +/-2.5°C of Set Value |
| Instrument Case | : | Weatherproof pressure die-cast Aluminum Alloy Casting with epoxy coated tall sides. Protective Class IP55 as per IS 13947 Part II. |
| Capillary Entry | : | Bottom or Top of the case |
| Cap. Length | : | Up to 15 Meters |
| Cap. Tubing | : | Capillary line protected by flexible Stainless Steel Armour and additional Stainless Steel Armour to reinforce at the entry to the case. |
| Standard Fittings | : | 1. Switch Testing Knob 2. Resettable Maximum Pointer 3. Anti-Vibration Mounting Grommets (for Projection Mounting) |
Model No. : 2003
This is a high performance, precision mercury switch instrument with +/- 2.5°C accuracy, capable of temperature monitoring, indication & control, for the protection of Transformers from 5 MVA rating.
| Technical Data | ||
| Dial Diameter | : | 150 mm (6") Round Type |
| Angular Sweep | : | 270° |
| Range | : | 0-150°C |
| Accuracy | : | +/-2.5°C |
| Graduations | : | 2°C per division |
| Electrical Connections : | ||
Cable
Conductor Size |
: | 1 sq. mm. |
| Oil Temperature | : | 4 Core Copper Cable for Switch Connections (Length as per Customer Requirement) |
Winding
Temperature Indicator |
: | 4 Core for Switch connections and 2 Core Copper Cable for CT Connection (Length as per Customer Requirement) |
All Line
to Body (Earth) High Voltage Breakdown Tested |
: | 2.5 KV AC, 50Hz. for 60 Seconds |
| Switch Configurations : | ||
Maximum
Number of Switches |
: | 2 |
| Switch Type | : | Heavy Duty Dry Electrode Mercury in Glass |
| Switch Rating | : | 2A AC/DC at 250V ± 10% |
| Switches | : | Normally Open Type |
| Adjustable Range | : | 10-90% of Full Scale Range |
| Switch Differential | : | 8°C Fixed |
| Switch Accuracy | : | +/-2.5°C of Set Value |
| Contact Type | : | Switch Contacts are Potential Free |
| Instrument Case | : | Weatherproof Aluminum Alloy Casting with epoxy coated at all sides. Suitable for outdoor mounting - Protective Class IP55 as per IS 13947 Part II. |
| Capillary Entry | : | Bottom or Top of the case |
| Cap. Length | : | Up to 6 Meters |
| Cap. Material | : | Capillary line protected by flexible Stainless Steel Armour |
| Standard Fittings : | 1. Switch Testing Knob 2. Resettable Maximum Pointer 3. Anti-Vibration Mounting |
|
2. Micro Switch Type Oil Temperature Indicators (OTI) / Winding Temperature Indicators (WTI) instruments.
Model No. : 2004 | Model No. : 2031
Model No. : 2004
This is a high performance instrument with +/- 2°C accuracy. capable of temperature monitoring, indication & control, for the protection of Transformers from 1 MVA to 10 MVA rating.
| Technical Data | ||
| Dial Diameter | : | 118 mm Segment Dial |
| Angular Sweep | : | 60° |
| Range | : | 0-120°C, 0-150°C, 20-140°C & 30-150°C |
| Accuracy | : | +/-2°C |
| Graduations | : | 2°C per division |
| Electrical Connections | ||
| All line to body(Earth) High Voltage Breakdown Tested | : | 2.5 KV AC, 50Hz for 60 seconds |
| Terminal Type | : | WAGO Terminals Press Fit Type |
| Switch Configurations : | ||
| Maximum Number of Switches | : | 4 |
| Switch Type | : | Heavy Duty Micro Switch |
| Switch Rating | : | 5A at 240V ± 10% AC & 0.5 A at 220 V ± 10% DC |
| Switches | : | Normally Open Type |
| Adjustable Range | : | 10-90% of Full Scale Range |
| Switch Differential | : | 5°C Fixed |
| Switch Accuracy | : | +/-2.5°C of Set Value |
| Contact Type | : | Switch Contacts are Potential Free |
| Instrument Case | : | Weatherproof pressure die-cast Aluminum
Alloy Casting with epoxy coated tall sides. |
| Capillary Entry | : | Bottom or Top of the case |
| Cap. Length | : | Up to 15 Meters |
| Cap. Tubing | : | Capillary line protected
by flexible Stainless Steel Armour and additional Stainless
Steel Armour to reinforce at the entry to the case. |
| Standard Fittings : | 1. Resettable Maximum Pointer 2. Anti-Vibration Mounting Grommets (for Projection Mounting) |
|
Model No. : 2031
This is a high performance, precision micro switch instrument with +/- 2.50C accuracy, capable of temperature monitoring, indication & control, for the protection of Transformers from 5 MVA rating.
| Technical Data : | ||
| Dial Diameter | : | 150 mm Segment Dial |
| Angular Sweep | : | 60° |
| Range | : | 0-150°C |
| Accuracy | : | +/-2.5°C |
| Graduations | : | 2°C per division |
| Electrical Connections : | ||
| Cable Conductor Size | : | 1 sq. mm. |
| Oil Temperature | : | 4 Core Copper Cable for Switch Connections (Length as per Customer Requirement) |
|
Winding
Temperature Indicator |
: | 4 Core for Switch connections and 2 Core Copper Cable for CT Connection Length as per Customer Requirement) |
All Line
to Body (Earth) High Voltage Breakdown Tested |
: | 2.5 KV AC, 50Hz. for 60 Seconds |
| Switch Configurations : | ||
Maximum
Number of Switches |
: | 2 |
| Switch Type | : | Heavy Duty Micro Switch |
| Switch Rating | : | 5A at 240V ± 10% AC & 0.5 A at 220 V ± 10% DC |
| Switches | : | Normally Open Type |
| Adjustable Range | : | 10-90% of Full Scale Range |
| Switch Differential | : | 5°C Fixed |
| Switch Accuracy | : | +/-2.5°C of Set Value |
| Contact Type | : | Switch Contacts are Potential Free |
| Instrument Case | : | Weatherproof Aluminum Alloy Casting with epoxy coated at all sides. Suitable for outdoor mounting - Protective Class IP55 as per IS 13947 Part II. |
| Capillary Entry | : | Bottom or Top of the case |
| Cap. Length | : | Up to 6 Meters |
| Cap. Material | : | Capillary line protected by flexible Stainless Steel Armour |
| Standard Fittings : | 1. Resettable Maximum Pointer 2. Anti-Vibration Mounting. |
|
3. Steel Direct Vertical Mounting type Oil/Winding Temperature Indicator/Controllers
Model No. : 1017
“Osmadial / Sciecon” Mercury in Steel Direct Vertical Mounting type Oil/Winding Temperature Indicator/Controllers are designed to protect the Electrical Power Transformers, Distribution Transformers, Rectifier Transformers from the danger of overheating of the Oil or Winding that would result overloading.
This Instrument is designed to measure the Temperature of Oil/Winding by mounting it directly over the transformer tank in the marshalling box. It is also known as Rigid Stem type Temperature Gauge.
| Case | : | Heavy duty die cast aluminium stoved enamelled Black finished IP-55 weather proof Direct Vertical Mounting case. |
| Dial Size | : | 100mm Ø, (150mm Ø can be provided) |
| Range | : | 0 - 120°C or as required. |
| Bulb/Stem | : | AISI SS 316 Material, SS Bulb 12.5mm OD x 202mm Total Length |
| Connection | : | AISI SS 316, 1/2” BSP(M) connection fixed at 154mm from bottom of the bulb. |
| Contacts | : | 2 Nos. (1 N.O. + 1 N.C) type Potential Free, Independently adjustable Electro-Mechanical Magnetic snap action type contacts for Alarm & Tripping mechanism |
| Contact Rating | : | 230 V AC 125mA / Dc 40 mA |
| Contact Cable | : | 1 mtr long 4 core cable at side entry of the case through cable gland. |
| Zero Adjust | : | Provided with External Zero Adjustment. |
ADVANTAGE OVER OTHER INDICATOR :
This Instrument can be installed directly on transformer
tank open to atmosphere without marshalling box.
4. Capillary type Oil/Winding Temperature Indicator/Controller
Model No. : 1135 / 3A - 4W
“Osmadial / Sciecon” Distance Capillary type Oil/Winding Temperature Indicator/Controller is specially designed for use where the hight of the Transformers is very high.
This instrument incorporates a Capillary between the Case & the Sensor Probe, this helps in mounting the Oil/Winding Temperature Gauge inisde the marshalling box at lower height by extending the Sensor Probe with the help of Capillary tube upto the top of transformer tank, thereby giving the perfect visibility of the temperatures inside the box.
| Case | : | Heavy duty die cast aluminium stoved enamelled Black finished IP-55 weather proof Surface Mounting case. |
| Dial Size | : | 100mm Ø, 150mm Ø |
| Range | : | 0 - 120°C or as required. |
| Capillary | : | 3/5/7 mtr long or as required, fine bore steel capillary covered on with solid drawn Red Duralleum-Teflon capillary, flexible at bottom entry of the case. |
| Bulb/Stem | : | AISI SS 316 Material, SS Bulb 10mm OD x 100mm Long |
| Connection | : | AISI SS 316, 1/2” BSP(M) connection fixed at 140mm from bottom of the bulb. |
| Contacts Type* | : | Ref - A - 4W 2 Nos. (1 N.O. + 1 N.C) type Potential Free, Independently adjustable Electro-Mechanical Magnetic snap action type contacts for Alarm & Tripping mechanism |
| Contact Rating | : | 230 V AC 125mA / Dc 40 mA |
| Contact Cable | : | 1 mtr long 4 core cable at side entry of the case through cable gland. |
* Options for Type of Contacts for Model No. 1017 & 1135
| i) | Contact Type | : | Ref - B - 6W (Not for Model No. 1017) |
| Contacts | : | 2 Nos N.O. type Contacts, Independently adjustable Electro- Mechanical Magnetic snap action type contacts for Alarm & Trip Mechanism. | |
| Contact Cable | : | 1 mtr long 6 core cable provided at side entry of the case through cable gland | |
| Contact Rating | : | 230 V AC 5A / 220 V DC 2A (Built in Relay type) | |
| ii) | Contact Type | : | Ref - C - 3W |
| Contacts | : | 2 Nos N.O. type Independently adjustable Electro-Mechanical Magnetic Snap action type contacts for Alarm & Trip Mechanism. | |
| Contact Cable | : | 1 mtr long 3 core cable provided at side entry of the case through cable gland | |
| Contact Rating | : | 230 V AC 0.1 A | |
| iii) | Contact Type | : | Ref - D - 4W |
| Contacts | : | 2 Nos N.O. type Independently adjustable Potential Free Electro-Mechanical Magnetic Snap action type contacts for Alarm & Trip Mechanism. | |
| Contact Cable | : | 1 mtr long 4 core cable provided at side entry of the case through cable gland | |
| Contact Rating | : | 230 V AC 1A / 220 V DC 0.1A |
5. Vapour Pressure Filled Direct Vertical Mounting type Oil/Winding Temperature Indicator/Controller
Model No. : 3 TG 1319
“Osmadial / Sciecon” Vapour Pressure Filled Direct Vertical Mounting type Oil/Winding Temperature Indicator/Controller is designed to protect the Electrical Power Transformers, Distribution Transformers, Rectifier Transformers from the danger of overheating of the Oil or Winding that would result overloading.
| Case | : | Heavy duty die cast aluminium stoved enamelled Black finished IP-55 weather proof Direct Vertical Mounting case. |
| Dial Size | : | 100mm Ø, (150mm Ø can be provided) |
| Range | : | 20 - 120°C or as required. |
| Bulb/Stem | : | Brass Bulb 14mm OD x 70mm Long Brass Stem 9.5mm OD x 185mm Long beyond the Bulb |
| Connection | : | Brass, 1/2” BSP(M) connection fixed at 154mm from bottom of the bulb |
| Contacts | : | 2 Nos. (1 N.O. + 1 N.C) type Potential Free, Independently adjustable Electrical Disc type contacts for Alarm & Tripping mechanisum |
| Contact Rating | : | 230 V AC 0.1A |
| Contact Cable | : | 1 mtr long 4 core cable at side entry of the case through cable gland |
| Zero Adjust | : | Provided with External Zero adjustment. |
6. Vapour Pressure Filled Distance Capillary type Oil/Winding Temperature Indicator/Controller
Model No. : 1012
“Osmadial / Sciecon” Vapour Pressure Filled Distance Capillary type Oil/Winding Temperature Indicator/Controller is specially designed for use where the hight of the Transformers is very high.
| Case | : | Heavy duty die cast aluminium stoved enamelled Black finished IP-55 weather proof Surface Mounting case. |
| Dial Size | : | 150mm Ø |
| Range | : | 0 - 120°C or as required. |
| Bulb/Stem | : | Brass Bulb 11mm OD x 100mm Long |
| Connection | : | Brass, 1/2” BSP(M) connection fixed at 140mm from bottom of the bulb |
| Contacts | : | 2 Nos. N.O type Independently adjustable Electrical Disc type contacts for Alarm & Tripping mechanism |
| Contact Rating | : | 230 V AC 0.1A |
| Contact Cable | : | 1 mtr long 3 core cable at side entry of the case through cable gland. |
| Zero Adjust | : | Provided with External Zero Adjsutment. |