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Short-Circuit WCRs
2:40
The Short-Circuit WCR is the UL 1008 test for a transfer switch’s ability to close into and withstand a fault current. These are the ratings which will actually appear on the UL label of the product.
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NEC code change for an engine-generator remote start circuit
3:11
There has been a recent change to the 2017 edition of the National Electrical Code for an engine-generator remote start circuit in an emergency system.
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What is WCR in a Transfer Switch?
2:18
A Withstand Closing Current Rating (WCR) represents a transfer switch's capability to ride out a fault condition until the overcurrent protection device clears the fault.
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What is the difference between an 80% and 100% rated breaker?
3:10
Learn the difference between an 80% rated breaker and 100% rated breaker.
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55 – Do you connect a harmonic filter to ground?
5:02
Do you connect a harmonic filter to ground?
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54 – Does a delta-wye transformer cancel all harmonics?
3:40
Does a delta-wye transformer cancel all harmonics?
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53 – Do all harmonics come from the loads or do some come from the utility source?
5:12
Do all harmonics come from the loads or do some come from the utility source?
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52 – Why is voltage distortion bad? Are multiple zero crossings on voltage from harmonics a bad thing?
4:18
Why is voltage distortion bad? Are multiple zero crossings on voltage from harmonics a bad thing?
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51 – How much power do I lose because of harmonics? Do I pay for harmonics on my power bill?
8:33
How much power do I lose because of harmonics? Do I pay for harmonics on my power bill?
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50 – How does a delta zig-zag transformer eliminate or minimize harmonic currents?
4:02
How does a delta zig-zag transformer eliminate or minimize harmonic currents?
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Požární ochrana a bezpečnost FVE
2:07:12
Přednáška představuje legislativní rámec a požadavky pro správné provedení FVE z hlediska požární ochrany, včetně nejčastějších chyb, kterých je potřeba se vyvarovat.
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