• Insta Control Private Limited

Thermistor protection unit

The Temp Sense thermistor protection unit, model TPU 01 DIN, from Insta Controls, Pune, protects transformers and electrical machines and comprises of PTC thermistors and an electronic relay unit. One set of thermistor can be connected to the TPU 01 DIN. Each set of thermistor consists of 3 thermistors in series (for three phase transformers/motors, 1 thermistor per phase) and the response temperature depends on the thermistors. As long as the temperature is not attained, the relay unit will not get actuated. The set of thermistors is wired to the terminals and when the temperature of the equipment exceeds the tripping temperature, the relay releases. When the temperature reduces below the safe level of the tripping temperature, the relay is reactuated. Upto 9 PTC Thermistors can be wired in series. As soon as one sensor reaches critical temperature, the increase in resistance will be detected by the protection unit and the equipment will be switched off. Features: Temp Sense reduces maintainence costs and repair cost of machine failures due to overloading. Permits operation of your motor only at safe and rated loads. Cuts down inventory and repair costs and eliminates blocking of capital. Most efficient, economical way to protect your motors from failure through a host of causes.