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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Substation</id>
		<title>Substation - Revision history</title>
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		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;action=history"/>
		<updated>2026-05-23T03:06:22Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=187129&amp;oldid=prev</id>
		<title>Designing Buildings at 07:52, 22 December 2020</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=187129&amp;oldid=prev"/>
				<updated>2020-12-22T07:52:41Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 07:52, 22 December 2020&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;= Introduction =&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltages that are easier and safer to distribute to homes, shops, small businesses and other consumers. This is necessary as it would be uneconomical and possibly dangerous to connect consumers directly to the main distribution network – they use small amounts of electricity in relation to industry and commerce – so it is 'stepped down' to a suitable voltage (240V AC in the UK) for local distribution.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltages that are easier and safer to distribute to homes, shops, small businesses and other consumers. This is necessary as it would be uneconomical and possibly dangerous to connect consumers directly to the main distribution network – they use small amounts of electricity in relation to industry and commerce – so it is 'stepped down' to a suitable voltage (240V AC in the UK) for local distribution.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 29:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 31:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Watt.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Watt.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:Theory]] [[Category:Roles_/_services]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] &lt;/ins&gt;[[Category:Theory]] [[Category:Roles_/_services]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=153099&amp;oldid=prev</id>
		<title>Editor at 11:54, 5 February 2020</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=153099&amp;oldid=prev"/>
				<updated>2020-02-05T11:54:46Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 11:54, 5 February 2020&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 13:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 13:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* Building an electrical grid for our times.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Energy consumption.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Energy consumption.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Energy storage.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Energy storage.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132871&amp;oldid=prev</id>
		<title>Designing Buildings at 06:23, 15 April 2019</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132871&amp;oldid=prev"/>
				<updated>2019-04-15T06:23:40Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
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			&lt;col class='diff-content' /&gt;
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		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 06:23, 15 April 2019&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltages that are easier and safer to distribute to homes, shops, small businesses and other consumers. This is necessary as it would be uneconomical and possibly dangerous to connect consumers directly to the main distribution network – they use small amounts of electricity in relation to industry and commerce – so it is stepped down to a suitable voltage (240V AC in the UK) for local distribution&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;. The electricity that is converted to lower voltages is said to have been ‘stepped down’&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltages that are easier and safer to distribute to homes, shops, small businesses and other consumers. This is necessary as it would be uneconomical and possibly dangerous to connect consumers directly to the main distribution network – they use small amounts of electricity in relation to industry and commerce – so it is &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'&lt;/ins&gt;stepped down&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;' &lt;/ins&gt;to a suitable voltage (240V AC in the UK) for local distribution.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Substations may also transform low-voltage electricity into higher voltages where large amounts of electricity are required, e.g a neighbourhood with numerous multi-storey buildings.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Substations may also transform low-voltage electricity into higher voltages where large amounts of electricity are required, e.g a neighbourhood with numerous multi-storey buildings.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Sub-stations vary in size according to the type and number of customers they serve – they are usually larger &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;in area &lt;/del&gt;if they serve commercial and industrial units, and smaller for residential neighbourhoods.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Sub-stations vary in size according to the type and number of customers they serve – they are usually larger if they serve commercial and industrial units, and smaller for residential neighbourhoods.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment is typically freestanding, unprotected from the weather and cordoned off with a wire fence. The public is explicitly forbidden from entering and is alerted by signs warning of possible death by electrocution.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment is typically freestanding, unprotected from the weather and cordoned off with a wire fence. The public is explicitly forbidden from entering and is alerted by signs warning of possible death by electrocution. &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Some &lt;/ins&gt;substations &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;are &lt;/ins&gt;very close to houses and others even on customers’ land.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;In London, the South East and East of England, there are thousands of electricity &lt;/del&gt;substations&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;, some &lt;/del&gt;very close to houses and others even on customers’ land.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Magnetic fields =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Magnetic fields =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment inside a substation produces a magnetic field but this &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;is thought to fall &lt;/del&gt;rapidly by the time it reaches the perimeter fence &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;where &lt;/del&gt;it &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;is said to be &lt;/del&gt;approaching background levels &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;– the type normally encountered away from a substation. &lt;/del&gt;(i.e very low levels measured in microteslas (µT) – an SI unit of magnetic flux density equal to 10−6 teslas). The electrical lines entering a substation, whether underground cables or overhead lines, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;are said to &lt;/del&gt;produce the highest magnetic field around the substation.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment inside a substation produces a magnetic field but this &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;reduces &lt;/ins&gt;rapidly &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;with distance, and &lt;/ins&gt;by the time it reaches the perimeter fence it approaching background levels (i.e very low levels measured in microteslas (µT) – an SI unit of magnetic flux density equal to 10−6 teslas). The electrical lines entering a substation, whether underground cables or overhead lines, produce the highest magnetic field around the substation.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132701&amp;oldid=prev</id>
		<title>Editor at 15:56, 11 April 2019</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132701&amp;oldid=prev"/>
				<updated>2019-04-11T15:56:21Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
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			&lt;col class='diff-content' /&gt;
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			&lt;col class='diff-content' /&gt;
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		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 15:56, 11 April 2019&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 9:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 9:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In London, the South East and East of England, there are thousands of electricity substations, some very close to houses and others even on customers’ land.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In London, the South East and East of England, there are thousands of electricity substations, some very close to houses and others even on customers’ land.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;Magnetic fields&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;= &lt;/ins&gt;Magnetic fields &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;=&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment inside a substation produces a magnetic field but this is thought to fall rapidly by the time it reaches the perimeter fence where it is said to be approaching background levels – the type normally encountered away from a substation. (i.e very low levels measured in microteslas (µT) – an SI unit of magnetic flux density equal to 10−6 teslas). The electrical lines entering a substation, whether underground cables or overhead lines, are said to produce the highest magnetic field around the substation.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;The equipment inside a substation produces a magnetic field but this is thought to fall rapidly by the time it reaches the perimeter fence where it is said to be approaching background levels – the type normally encountered away from a substation. (i.e very low levels measured in microteslas (µT) – an SI unit of magnetic flux density equal to 10−6 teslas). The electrical lines entering a substation, whether underground cables or overhead lines, are said to produce the highest magnetic field around the substation.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Editor</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132700&amp;oldid=prev</id>
		<title>Editor: Created page with &quot;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltag...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Substation&amp;diff=132700&amp;oldid=prev"/>
				<updated>2019-04-11T15:56:05Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltag...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;In electrical engineering, a substation is a facility housing equipment that switches, transforms or converts high voltage electricity from a generating station into lower voltages that are easier and safer to distribute to homes, shops, small businesses and other consumers. This is necessary as it would be uneconomical and possibly dangerous to connect consumers directly to the main distribution network – they use small amounts of electricity in relation to industry and commerce – so it is stepped down to a suitable voltage (240V AC in the UK) for local distribution. The electricity that is converted to lower voltages is said to have been ‘stepped down’.&lt;br /&gt;
&lt;br /&gt;
Substations may also transform low-voltage electricity into higher voltages where large amounts of electricity are required, e.g a neighbourhood with numerous multi-storey buildings.&lt;br /&gt;
&lt;br /&gt;
Sub-stations vary in size according to the type and number of customers they serve – they are usually larger in area if they serve commercial and industrial units, and smaller for residential neighbourhoods.&lt;br /&gt;
&lt;br /&gt;
The equipment is typically freestanding, unprotected from the weather and cordoned off with a wire fence. The public is explicitly forbidden from entering and is alerted by signs warning of possible death by electrocution.&lt;br /&gt;
&lt;br /&gt;
In London, the South East and East of England, there are thousands of electricity substations, some very close to houses and others even on customers’ land.&lt;br /&gt;
&lt;br /&gt;
Magnetic fields&lt;br /&gt;
&lt;br /&gt;
The equipment inside a substation produces a magnetic field but this is thought to fall rapidly by the time it reaches the perimeter fence where it is said to be approaching background levels – the type normally encountered away from a substation. (i.e very low levels measured in microteslas (µT) – an SI unit of magnetic flux density equal to 10−6 teslas). The electrical lines entering a substation, whether underground cables or overhead lines, are said to produce the highest magnetic field around the substation.&lt;br /&gt;
&lt;br /&gt;
= Related articles on Designing Buildings Wiki =&lt;br /&gt;
&lt;br /&gt;
* Energy consumption.&lt;br /&gt;
* Energy storage.&lt;br /&gt;
* Electricity supply.&lt;br /&gt;
* Fossil fuel.&lt;br /&gt;
* Hydroelectricity.&lt;br /&gt;
* Micro-grids.&lt;br /&gt;
* Microgeneration.&lt;br /&gt;
* Oil - a global perspective.&lt;br /&gt;
* Power.&lt;br /&gt;
* Renewable energy.&lt;br /&gt;
* Solar photovoltaics.&lt;br /&gt;
* The future of UK power generation.&lt;br /&gt;
* Types of fuel.&lt;br /&gt;
* Watt.&lt;br /&gt;
&lt;br /&gt;
[[Category:Theory]] [[Category:Roles_/_services]]&lt;/div&gt;</summary>
		<author><name>Editor</name></author>	</entry>

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