<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/"><channel><title>CR4 - Section&#x3a; Electrical Engineering</title><link>https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;section&#x2f;electrical-engineering</link><description><![CDATA[The Electrical Engineering section of CR4 includes forum and blog entries related to sensors and switches, power generation and distribution, test and measurement, alternative and renewable energy sources, etc.]]></description><copyright>Copyright 2026</copyright><pubDate>Tue, 14 Jul 2026 02:27:34 EST</pubDate><generator>https&#x3a;&#x2f;&#x2f;cr4.globalspec.com</generator><item><title><![CDATA[Paradigm Shift on Substation Protection]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151602&#x2f;Paradigm-Shift-on-Substation-Protection&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[good day everyone, it&#x27;s been quite a long time since i got back here. i ask apologies from the active members and masters here. anyways the question as follows&#x3a; our existing practice in our company was to use the conventional charging system for a substation protection dc supply- battery bank plus c]]></description><pubDate>Tue, 14 Jul 2026 02&#x3a;27&#x3a;34 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151602&#x2f;Paradigm-Shift-on-Substation-Protection]]></guid><dc:creator>Rockraiden21</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[HV Switchgear - Internal Earth Bar]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151579&#x2f;HV-Switchgear-Internal-Earth-Bar&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[HV Switchgear &#x28;IEC 62271-1, 62271-200&#x29;&#x3a; The size of the internal earth bus &#x28;the bar running through the entire switchgear lineup&#x29; differs from the size indicated in the type test report. Is this acceptable&#x3f; Is the busbar size specified in the type test report applicable only to the main busbars and]]></description><pubDate>Mon, 29 Jun 2026 11&#x3a;06&#x3a;40 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151579&#x2f;HV-Switchgear-Internal-Earth-Bar]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Converting Active Pulse Output to Passive]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151571&#x2f;Converting-Active-Pulse-Output-to-Passive&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[I have an electromagnetic flowmeter that has an active pulse output per unit flow.&#x28;High Level&#x3d; 5-15vdc max 250 mA, low level &#x26;lt&#x3b;1vdc&#x29;. My chemical metering pump cannot accept an active output pulse, it needs the pulse to be generated by its own dc power supply.Is there an easy way to make this conv]]></description><pubDate>Tue, 23 Jun 2026 13&#x3a;44&#x3a;34 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151571&#x2f;Converting-Active-Pulse-Output-to-Passive]]></guid><dc:creator>REH</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Software Required for SLC 5&#x2f;03 Allen Bradley PLC]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151568&#x2f;Software-Required-for-SLC-5-03-Allen-Bradley-PLC&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Hi everyone, I have an Allen-Bradley SLC 5&#x2f;03 PLC. Can anyone confirm the correct software needed&#x3f; If someone has experience with this PLC, please guide me. If anyone can help with obtaining the software, kindly let me know. Thanks.]]></description><pubDate>Mon, 22 Jun 2026 11&#x3a;16&#x3a;29 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151568&#x2f;Software-Required-for-SLC-5-03-Allen-Bradley-PLC]]></guid><dc:creator>DE ENG</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Motorized MCCB]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151562&#x2f;Motorized-MCCB&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[For a motorized MCCB used as an incomer&#x3a;&#xa;&#xa;a&#x29; The MCCB should be capable of rack-in&#x2f;rack-out operation with the door closed.&#xa;&#xa;b&#x29; The door should not be openable when the MCCB is in the ON position.&#xa;&#xa;One vendor states that for a motorized MCCB, requirement &#x28;a&#x29; cannot be achieved, but requirement &#x28;b&#x29; c]]></description><pubDate>Mon, 15 Jun 2026 12&#x3a;09&#x3a;42 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151562&#x2f;Motorized-MCCB]]></guid><dc:creator>Selk</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Form 4A &#x2014; LV Panel &#x2014; Rotary Handle]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151544&#x2f;Form-4A-LV-Panel-Rotary-Handle&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[If it is Form 4A &#x28;Form of Separation for LV distribution boards&#x29;, does this automatically mean that rotary handles are provided on the DB door to operate the MCCB&#x3f;]]></description><pubDate>Tue, 02 Jun 2026 04&#x3a;21&#x3a;31 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151544&#x2f;Form-4A-LV-Panel-Rotary-Handle]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Emergency Light Fixture]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151543&#x2f;Emergency-Light-Fixture&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[For emergency light fixtures,&#xa;&#xa;1&#x29; Combining both the power cable and the charging cable in the same cable &#x28;Multi core&#x29; acceptable&#x3f; &#x28;refer magenta line in the picture&#x29;&#xa;&#xa;2&#x29; Taking power for charging from the separate circuit breaker acceptable&#x3f; any disadvantage in it&#x3f; &#x28;refer yellow line in the picture]]></description><pubDate>Mon, 01 Jun 2026 14&#x3a;04&#x3a;45 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151543&#x2f;Emergency-Light-Fixture]]></guid><dc:creator>Selk</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Arc Flash and IP Rating]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151514&#x2f;Arc-Flash-and-IP-Rating&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[What is the minimum IP rating required for an enclosure to direct the exhaust of extremely hot gases from an internal arcing event away from personnel&#x3f;&#xa;&#xa;&#x28;or&#x29;&#xa;&#xa;In the case of a non arc rated enclosure, which IP rating provides optimal protection against arc flash for personnel in the vicinity&#x3f;]]></description><pubDate>Mon, 11 May 2026 15&#x3a;41&#x3a;48 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151514&#x2f;Arc-Flash-and-IP-Rating]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[Undervoltage Relay for Low Voltage Motors]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151509&#x2f;Undervoltage-Relay-for-Low-Voltage-Motors&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Do you provide dedicated undervoltage protection for low voltage motors below 100 kW&#x3f;&#xd; My understanding is that, in this power range, undervoltage is typically addressed by the overload relay, since a drop in voltage leads to an increase in current.&#xd; In such cases&#x3a;&#xd; Should undervoltage protection be]]></description><pubDate>Thu, 07 May 2026 10&#x3a;12&#x3a;35 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151509&#x2f;Undervoltage-Relay-for-Low-Voltage-Motors]]></guid><dc:creator>Selk</dc:creator><dc:subject>Electrical Engineering</dc:subject></item></channel></rss>