- Phase Failure Relays
- Monitoring Relays
- Motor / Pump Protection Relays
- Electronics Timers
- Liquid Level Controllers
- Power Line Transducers And MFM
- Automation Products
- Alarm Annunciators
- Products For Agri Sector
Motor / Pump Protection Relays
PTC
PTC Thermistors are semiconductor sensors with the ability to change resistance instantly at a specified pre-defined response temperature (NRT).
The PTC Thermistors are embedded in the overhang location of the motor windings.
The NRT value of PTC is selected according to the Insulation Class of the copper windings of motor or transformers.
Technical Data
Selection Chart for NRT of PTC Thermistors. | ||
NRT °C | Class of Ins. | Cable Colour Code |
70 | - | White - Brown |
80 | - | White - White |
90 | - | Green - Green |
100 | A | Red - Red |
110 | - | Brown - Brown |
120 | E | Grey - Grey |
130 | B | Blue - Blue |
140 | - | White - Blue |
150 | F | Black - Black |
160 | - | Blue - Red |
170 | H | White - Green |
180 | C | White - Red |
190 | - | Orange - Black |
- Ordering Information
Primary & Secondary Current
Inner Diameter
Outer Diameter
Minilec Relay Model Name
- Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)