Answer Posted / sri

The Temperature PT-100 sensor is a Platinum resistance
thermometer (PRT) which offers high accuracy over a wide
temperature range (from -200 to 400 °C). The Platinum
resistance thermometer (PT-100) has a resistance of 100
Ohms at 0°C, so it called as PT100. it offers 138.4 Ohms at
100 °C. The resistance changes (fearly linear) with
temperature are: 0.385 Ohm/°C.
by using a wheatstone bridge we can measure the change in
the resistance, which is in the form of voltage.

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

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