<?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>Thu, 20 Aug 2026 03:25:13 EST</pubDate><generator>https&#x3a;&#x2f;&#x2f;cr4.globalspec.com</generator><item><title><![CDATA[FANUC aiSV 40&#x2f;40 SP1241 &#x2014; Accel-only Intermittent, Gate Driver Suspicion]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151658&#x2f;FANUC-aiSV-40-40-SP1241-Accel-only-Intermittent-Gate-Driver-Suspicion&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Been chasing this one for two days and need a sanity check.&#xd; Customer&#x27;s &#x26;alpha&#x3b;iSV 40&#x2f;40 &#x28;A06B-6117-H105&#x29; throws SP1241 on spindle acceleration. Random &#x26;mdash&#x3b; maybe 1 in 7 accel events. Power cycle clears it, no other alarms, no pattern in load or speed. Decel and steady-state are clean.&#xd; I reprodu]]></description><pubDate>Thu, 20 Aug 2026 03&#x3a;25&#x3a;13 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151658&#x2f;FANUC-aiSV-40-40-SP1241-Accel-only-Intermittent-Gate-Driver-Suspicion]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[LV Switchgear - IEC 61439 - Temperature Rise]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151648&#x2f;LV-Switchgear-IEC-61439-Temperature-Rise&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[The specification says, &#x22; LV Switchgear Bus bar temperature rise shall not exceed 45&#x26;deg&#x3b;C under rated current&#x22;.&#xa;&#xa;The ambient temperature is around 45&#x26;deg&#x3b;C.&#xa;&#xa;It means the maximum permitted operational temperature under normal service conditions is 90&#x26;deg&#x3b;C &#x28;permitted temperature rise &#x2b; Ambient temp]]></description><pubDate>Fri, 14 Aug 2026 15&#x3a;58&#x3a;13 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151648&#x2f;LV-Switchgear-IEC-61439-Temperature-Rise]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[How Do We Move EMC from a Final Compliance Test to a Sequence of Engineering Design Gates&#x3f;]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151640&#x2f;How-Do-We-Move-EMC-from-a-Final-Compliance-Test-to-a-Sequence-of-Engineering-Design-Gates&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[Too often, EMC is treated as something to verify after the layout, enclosure, cabling, and firmware are already fixed. By that stage, the available corrective actions are usually limited, expensive, and disruptive.&#xa;&#xa;A better approach is to review EMC risk progressively during development. That means]]></description><pubDate>Wed, 12 Aug 2026 00&#x3a;37&#x3a;41 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151640&#x2f;How-Do-We-Move-EMC-from-a-Final-Compliance-Test-to-a-Sequence-of-Engineering-Design-Gates]]></guid><dc:creator>stancermtl</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[ONAN Transformer Radiator Oil Leak ]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151632&#x2f;ONAN-Transformer-Radiator-Oil-Leak&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[I have transformer that has sustained some damage to the fins. A previous cold weld repair was attempted&#x3b; however, it has not provided a durable seal and is no longer effective as there is an oil leak.&#xa;&#xa;Does anyone have experience with a similar problem&#x2f; any recommendations.&#xa;&#xa;Cheers.]]></description><pubDate>Mon, 10 Aug 2026 01&#x3a;47&#x3a;29 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151632&#x2f;ONAN-Transformer-Radiator-Oil-Leak]]></guid><dc:creator>Mathias Malandu</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><item><title><![CDATA[IEC 61439-2 - Form of Separation - Metallic Versus Non Metallic Barrier]]></title><link><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151626&#x2f;IEC-61439-2-Form-of-Separation-Metallic-Versus-Non-Metallic-Barrier&#x3f;from_rss&#x3d;1]]></link><description><![CDATA[sorry for the dumb question&#x3a; The standard states that separation may be achieved by means of partitions or barriers &#x28;metallic or non-metallic&#x29;, insulation of live parts or by the integral housing of a device itself &#x28;e.g. MCCB&#x29;.&#xa;&#xa;Then everyone may prefer to use non metallic &#x28;acrylic sheets&#x29;&#x3b; Why do m]]></description><pubDate>Mon, 03 Aug 2026 14&#x3a;52&#x3a;12 EST</pubDate><guid><![CDATA[https&#x3a;&#x2f;&#x2f;cr4.globalspec.com&#x2f;thread&#x2f;151626&#x2f;IEC-61439-2-Form-of-Separation-Metallic-Versus-Non-Metallic-Barrier]]></guid><dc:creator>Anonymous Poster</dc:creator><dc:subject>Electrical Engineering</dc:subject></item><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></channel></rss>