Temperature indicator of transformer these are generally precision instruments. Full circuit diagram supplied with each instrument all circuits insulation tested with 2000 vac.
Testing Of Transformer Oil And Winding Temperature Indicators
Wti ct connection diagram. Transformer ct output maximum 5 amps as standard electrical connections. There are four typical types of current transformers. These instruments indicate instantaneous temperature of oil and windings of transformer. Wti micro switches 1 up to 4 x change over contact options eoti ewti analog output 4 20 ma maximum resistance. Wtioti working principle winding temperature and oil temperature working principle of transformer tempereture indicator of transformer by learn electrical. Details of winding temperature indicatorwti.
Friends i am muhammad asif ek aur new video how to ct connection and ct installation 3 phase ct energy meter connection diagram in urduhindi mm asif ke sath huzoor hoon aur umeed karta. 450 ohm communication port rs 485 modbus communication appendix a pt100 pt 100 port max 2 x oti wti 1 optional x eoti ewti 34 technical features standard connection flange 4 holes ø 7 mm holes wheelbase ø 175 mm. That means this device performs three functions. Grey powder coated paint. Wti and oti of transformer. At best this device is only accurate at top nameplate rated load and then only if it is not out of calibration.
A temperature indicator of power transformer is specially designed for protection of transformer in addition to its temperature indication and cooling control features. The wtis are provided with gradient adjustment through a shunt for ct secondary input 1a to 5a. These devices are supposed to indicate hottest spot in the winding based on the manufacturers heat run tests. Window bushing bar and woundthe primary winding can consist merely of the primary current conductor passing once through an aperture in the current transformer core window or bar type or it may consist of two or more turns wound on the core together with the secondary winding wound type. Surface or panel mounting options. Instrument cases are aluminium die casted and polyester powder coated.
Terminal block conductor size. The wti means winding temperature indicator and oti means oil temperature indicator which indicates the winding temperature oil temperature of the transformer and operates the alarm trip and cooler control contactsthis instrument operates on the principle of thermal imaging and it is not an actual measurement. Transformer winding temperature thermometer. The wti instruments have a built in thermal imaging system for transformers hot spot indication. Inside the instrument is fitted a heating resistance which is fed by a current proportionate to the current flowing through the transformer winding. To do this we connect the terminal of the heating resistance with the bushing current transformer so that reflection of change in load is reflected in the winding temperature indicator wti.
