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Model: TOP
Thermal Overload Protector (available in different shapes and sizes as shown here) is a bimetal disc specially designed for a specific rating of temperature. This provides a complete protection to single phase Motors, Transformers, Pumps and all Domestic Appliances from damaging due to overheating. These can be embedded into the motors or transformer winding or any other equipments. The Protectors are selected according to the safe temperature of the motor or the equipment from damaging due to overheating. Whenever the equipment gets heated to the switching temperature of the Protector, the contact of the Protector changes it’s status and the Equipment can be switched off to avoid further heating and burning.
The protectors are available in different current ratings and wide range of switching temperatures from 60 deg. to 160 deg. C.
The NC type protectors are connected directly in series with the winding of Motors or Primary of Transformers. Whenever the winding gets heated beyond the acceptable limit, the contact of the Protector opens and the equipment (Motor or Transformer) gets switched off. The Protector contact resets automatically 40 deg. C. below the tripping temperature to avoid the chattering effect. This is a most economical and fail safe solution to protecting the Equipments from damaging due to overheating.
Each TOP has a bimetal disc specially designed for that rating. Every TOP is calibrated and checked twice for opening and resetting temperature. Thus consistent performance over required life cycles is achieved. |
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Thermal Overload Protector – Features
- Wide range of Tripping Temperatures – from 60 deg. C. to 160 deg. C.
- Excellent accuracy – Tripping temperature tolerance of + 5 deg. C only.
- Temperature and Current sensitive.
- Miniature size with rugged and robust construction.
- Sealed case suitable for various impregnation processes.
- Fast temperature response due to close proximity of disc to the sensing surface.
- Various Lead lengths available.
- Repeatable temperature performance over life.
- Enhances Quality and Safety of your over life.
- TOPs with current rating greater than 25 Amps are also available.
- ECONOMICAL – As no external control is required.
Regular supply in India to various Single-phase Motor, Transformer, Pump and Appliance manufactures, as O.E. i.e. Original Equipment Manufactures. |
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TOPs are also available for Submersible Pumps :
Technical details for model: TOPII |
| Sr. No. |
SPECIFICATION |
PARAMETERS |
| 1 |
Contact Type |
NC / NO |
| 2 |
Operating Mode |
Auto Reset |
| 3 |
Type of TOP |
Snap Action Disc |
| 4 |
Tripping Temperature |
60 C to 160 C |
| 5 |
Standard Tolerance |
 5C |
| 6 |
Reset Temperature |
30 C  10 C |
| 7 |
Operating Voltage….Ac / ….DC |
440 V AC /100 V DC |
| 8 |
Rated AC Voltage |
230 V AC |
| 9 |
Rated AC Current at Cos ? = 1.0 |
10.0 A |
| 10 |
Rated AC Current at Cos ? = 0.6 |
6.5 A |
| 11 |
Max. Switching Current |
25.0 A |
| 12 |
Contact Bounce time |
< 20 ms |
| 13 |
Current sensitivity |
Yes |
| 14 |
Switch Cycles |
10,000 |
| 15 |
Impregnation Resistant |
Suitable |
| 16 |
High Voltage Insulation |
2.0 kV |
| 17 |
Maximum Ambient Temperature |
180 C |
| 18 |
Standard Connection |
Lead 0.75 mm2 |
| 19 |
Length X Width X Height |
20 X 11.0 X 3.8 mm |
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Model TOP- I
Thermal Overload Protector is a bimetal disc specially designed for a specific rating of temperature. This provides a complete protection to single phase Motors, Transformers, Pumps and all Domestic Appliances from damaging due to overheating. The miniature version of these protectors is a small round type device which can be embedded into the motors or transformer winding or any other equipments. The Protectors are selected according to the safe temperature of the motor or the equipment from damaging due to overheating. Whenever the equipment gets heated to the switching temperature of the Protector, the contact of the Protector changes it’s status and the Equipment can be switched off to avoid further heating and burning. |
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The protectors are available in different current ratings and wide range of switching temperatures from 60 deg. to 160 deg. C. The NC type protectors are connected directly in series with the winding of Motors or Primary of Transformers. Whenever the winding gets heated beyond the acceptable limit, the contact of the Protector opens and the equipment (Motor or Transformer) gets switched off. The Protector contact resets automatically 40 deg. C. below the tripping temperature to avoid the chattering effect. This is a most economical and fail safe solution to protecting the Equipments from damaging due to overheating. |
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Technical Specifications : |
| Operating Voltage : |
12 Volts to 440 Volts |
| Rated Voltage : |
230 Volts AC |
| Rated Current: |
Available in 3 Amp.; 7 Amp.; 14 Amp. |
| Maximum Switching Current : |
7.5 Amp; 19 Amp.; 42 Amp. |
| Switching Temperature range : |
60 deg to 160 deg. ( to be selected as per the acceptable limit of the Equipment to be protected) |
| Switching Temp. Tolerance : |
 5 deg. C |
| Contact : |
Normally Closed type |
| Switching Cycles : |
10, 000 |
| Diameter : |
10.8 mm |
| Thickness : |
2.2 mm ( for 3 Amp.); 4.5 mm ( for 7 Amp.); 6.6 mm ( for 14 Amp.) |
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