TNC Switch Working, Application and Connection Diagram

TNC Switch Working, Application and Connection Diagram

TNC Switch is used in the RP/CP (Remote TNC Switch) and in the Breaker (Local TNC Switch) for Tripping and Closing the Breaker Manually. What is a TNC Switch? It is a Three Position Switch, used for Closing or tripping the Breaker Manually from Control Panel/Relay Panel in the Control Room.  The Three Positions are…

Overcurrent & Earthfault Protection – Basic Concept:
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Overcurrent & Earthfault Protection – Basic Concept:

[et_pb_section fb_built=”1″ _builder_version=”3.22.3″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.22.3″][et_pb_column type=”4_4″ _builder_version=”3.19″][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] In this post we will be seeing , the Basic Concept of Overcurrent Protection, which includes, relay Characteristics, Relay Settings with Example. [/et_pb_text][et_pb_text module_class=”custom-module” _builder_version=”3.19.9″ text_font=”Lato||||||||” text_line_height=”1.2em” header_font=”||||||||” box_shadow_style=”preset1″ custom_margin=”0px||” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] What is an Overcurrent…

Master Trip Relay (86) Concept in Power System Explained in Detail

Master Trip Relay (86) Concept in Power System Explained in Detail

Master Trip Relay, you may have herd this term , quite a lot of times, now we are going to understand, what it exatly is, in the following post. What is a Master Trip Relay? Defination: Master trip relay is a contact multiplication or an Auxillary  relay, which operates on the command from Multiple protection relays…

What is the Duty Cycle/Operating Sequence of Circuit Breaker specified on the Name Plate
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What is the Duty Cycle/Operating Sequence of Circuit Breaker specified on the Name Plate

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] We keep wondering what the heck this sequence on the name plate of the Circuit Brekaer. Lets find it out now. [/et_pb_text][et_pb_text module_class=”custom-module” _builder_version=”3.19.9″ text_font=”Lato||||||||” text_line_height=”1.2em” header_font=”||||||||” box_shadow_style=”preset1″ custom_margin=”0px||” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] What is the Duty Cycle/…

Circuit Breaker Testing with Standard Test Results
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Circuit Breaker Testing with Standard Test Results

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] There are following Commissioning Tests, Diagnostic Tests and Trials of Circuit Breaker. [/et_pb_text][et_pb_text module_class=”custom-module” _builder_version=”3.19.9″ text_font=”Lato||||||||” text_line_height=”1.2em” header_font=”||||||||” box_shadow_style=”preset1″ custom_margin=”0px||” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] 1) Measurement of Insulation Resistance: Objective: To ensure that each pole of…

Everything about Circuit Breaker in Power System

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] Circuit Breakers is Protective Device used in Power System to make or Break the Circuit.  [/et_pb_text][et_pb_text _builder_version=”3.19.3″ text_font=”Lato||||||||” text_line_height=”1.3em” box_shadow_style=”preset1″ custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] Definition: CB is an Onload Switching Device, which can operate Manually for…

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Tripping Circuit of 33 KV Outdoor GO VCB

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.4″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”]There are two Tripping Circuits in the Breaker, Called a Trip Circuit 1 and Trip Circuit 2. Both this Tripping Circuits should have different DC Supply and different Tripping.  Tripping Circuit of VCB can be divided into…

Troubleshooting Circuit Breaker not Closing Electrically Problem in 33 KV Outdoor GO VCB
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Troubleshooting Circuit Breaker not Closing Electrically Problem in 33 KV Outdoor GO VCB

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] A very common problem in EHV Substations, Circuit Breaker not closing Electrically.  The Troubleshooting steps are as under: [/et_pb_text][et_pb_text _builder_version=”3.19.3″ text_font=”Lato||||||||” text_line_height=”1.3em” box_shadow_style=”preset1″ custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] Step 1: Basic Checks: Check the DC Supply to…

Closing Circuit of 33 kv Outdoor Gang Operated Vaccume Circuit Breaker

Closing Circuit of 33 kv Outdoor Gang Operated Vaccume Circuit Breaker

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.5″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] There are following elements in the Closing Circuit: Closing Coil TNC Switch Closing Resistance NC Aux Contact 52b Antipumping Relay Local Remote Switch [/et_pb_text][et_pb_text _builder_version=”3.19.3″ text_font=”Lato||||||||” text_line_height=”1.3em” box_shadow_style=”preset1″ custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] Closing Coil: A permanat…

Control Circuit of 33 KV Outdoor Vaccume Circuit Breaker

[et_pb_section fb_built=”1″ _builder_version=”3.17.6″ background_color=”rgba(255,255,255,0.76)” custom_margin=”0px|||0px” custom_padding=”0|0|0|0|false|false”][et_pb_row custom_padding=”0|0px|20.1389px|0px|false|false” _builder_version=”3.19″][et_pb_column type=”4_4″ _builder_version=”3.19″ parallax=”off” parallax_method=”on”][et_pb_text _builder_version=”3.19.3″ text_font=”Lato||||||||” text_line_height=”1.3em” custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] Control Circuit can be divided into following Circuits: DC Supply to the Breaker Closing Circuit Tripping Circuit Indication Circuit Spring Charge Motor Control Circuit. [/et_pb_text][et_pb_text _builder_version=”3.19.3″ text_font=”Lato||||||||” text_line_height=”1.3em” box_shadow_style=”preset1″ custom_padding=”20px|20px|20px|20px” inline_fonts=”Arial,Georgia,Times New Roman”] DC Supply to…

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