Panelboard Switch
Todays deals on Panelboard Switch?
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Federal Pacific QMQB Unit Catalog Number QMQB7036R Panel Board Switch $2,899.00 |
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FDPS367T WESTINGHOUSE 800 AMP 600 VOLT FUSIBLE DISCONNECT PANELBOARD SWITCH (A) $2,800.00 |
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Square D QMB327MWT3 series E1 800 amp 240 volt 3 phase panelboard switch $2,500.00 |
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Frank Adams FCSAW60333 600A 240V 3 phase panelboard switch $2,499.99 |
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Square D QMB365MW series E1 400 amp 600 volt 3 phase panelboard switch $2,399.99 |
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GE QMR3670 800A 600V 3 phase panelboard switch $1,999.99 |
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Frank Adams FCSAW60322 600A 240V single phase panelboard switch $1,899.99 |
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Frank Adams FCSAW40322 400A 240V single phase panelboard switch $1,799.99 |
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Square D QMB3260M series 4 600 amp 240 volt 3 phase panelboard switch $1,499.99 |
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CUTLER-HAMMER FDPW325BR 400A FUSED PANELBOARD SWITCH $1,100.00 |
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Square D QMB326MW series E2 600 amp 240 volt 3 phase panelboard switch $949.99 |
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Allen Bradley Panel Board Switch FREE SHIPPING $1,073.00 |
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Allen Bradley Panel Board Switch FREE SHIPPING $1,073.00 |
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30 & 100 amp Square D Fusible Panelboard Switch 600v 3 poles $999.99 |
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SQ D QMB363MW 100A 600V FUSIBLE MAIN PANELBOARD SWITCH NEW IN BOX $999.00 |
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*NEW* ITE UV364 200A 600v 3 phase fusable panelboard switch $949.99 |
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Square D QMB3240M series 1 400 amp 240 volt 3 phase panelboard switch $799.99 |
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Gould ITE Vacu-Break Clampmatic Panel Board Switch 1000 Amp $807.50 |
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GE THFP365 400A 600v. 3 phase fusable panelboard switch w/ mounting hardware $749.99 |
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Square D QMB3640 series 4 400 amp 600 volt 3 phase panelboard switch $694.99 |
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Square D QMB334TW series E1 200 amp 480 volt 3 phase twin panelboard switch $650.00 |
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GE THFP325 (THFP 325) Panelboard Switch- TAKEOUT $650.00 |
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Square D QMB364W (QMB 364W) Panelboard Switch $650.00 |
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Square D QMB363T Fusible Panelboard Switch 600V 100A 3P $600.00 |
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Square D QMB2240 series 1 400 amp 240 volt single phase panelboard switch $499.99 |
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SIEMENS/ I.T.E. V7H3605 VACU-BREAK PANELBOARD DISCONNECT SWITCH, 400 AMP, 3 POLE $600.00 |
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Westinghouse FDPT4210 100A 240V single phase panelboard switch $449.99 |
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QMB362TWRK SQUARE D 60 AMP 600 VOLT QMB TWIN PANELBOARD DISCONNECT SWITCH (A) $550.00 |
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Square D QMB364 (QMB 364) Panelboard Unit, Model D02 *NEW* $500.00 |
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Square D QMB362T Fusible Panelboard Switch 600V 60A 3P $500.00 |
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Square D QMB333TW series E1 100 amp 480 volt 3 phase twin panelboard switch $500.00 |
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White Westinghouse FDPS3220 200 amp 240 volt 3 phase panelboard switch $474.99 |
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NEW Siemens ITE V2F3204 200A 240V 3 Pole 3 Phase PanelBoard Switch $479.99 |
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Square D QMB3620 200 amp 600 volt 3 phase panelboard switch $449.99 |
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Square D QMB364 series D2 200 amp 600 volt 3 phase panelboard switch $450.00 |
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Square D QMB3240 400A 240v 3 phase fusable panelboard switch $399.99 |
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Square D QMB636T31 series D2 30/100 amp 600 volt 3 phase twin panelboard switch $449.99 |
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Westinghouse FDPT62x6 60A 240V 3 phase panelboard switch $299.99 |
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Square D QMB2220 series 1 200 amp 240 volt single phase panelboard switch $400.00 |
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Square D QMB324 series D2 200 amp 240 volt 3 phase twin panelboard switch $400.00 |
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Square D QMB363T (QMB 363T) Twin Panelboard Unit, Model D02 *NEW* $400.00 |
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Square D QMB363M 100 amp 600 volt 3 phase panelboard switch $374.99 |
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ITE V2F3204 PANELBOARD SWITCH 200 amp 240 volt 3 PHASE $400.00 |
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NEW Square D QMB361TW Fusible Panelboard Switch 30A $400.00 |
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Square D QMB361T Fusible Panelboard Switch 30 amp $399.99 |
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SIEMENS ITE V2E2204LR VACU-BREAK PANELBOARD SWITCH $399.99 |
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Square D QMB323TW series E1 100 amp 240 volt 3 phase twin panelboard switch $350.00 |
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Gould I-T-E V7H3605 Panelboard Switch 600V 400A 3 Pole $325.00 |
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Square D 60amp Panelboard Switch #QMB362TW $350.00 |
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ITE V7F2604LR 2P, 200A, 600V Panel Board Switch $350.00 |
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Square D QMB362TW (QMB 362 TW) Twin Panelboard Switch $325.00 |
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SIEMENS V7B3222 VACU-BREAKER PANEL BOARD UNIT 60AMP $299.99 $299.99 |
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Square D 100 Amp, 240 VAC 2 Pole Series D2 QMB-223-TD Twin Panelboard Switch $325.00 |
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Siemens Fused Panelboard Switch 100amp #V7E3603 $325.00 |
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Cutler Hammer FDPWT 3211R Panelboard Switch -Lot of 2 $300.00 |
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Cutler Hammer FDPWT 3222R Panelboard Switch -Lot of 2 $300.00 |
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Square D QMQB3606T (QMQB 3606T) Twin Panelboard Switch *NEW* $300.00 |
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Westinghouse FDPWS324R Panelboard Unit 3P 200A 240V $300.00 |
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Zinsco Uniflex QSF2032B 200 amp 240 volt single phase panelboard switch $299.99 |
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Zinsco Uniflex U2032 200 amp 240 volt single phase panelboard switch $299.99 |
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Siemens V7E3623 Panelboard Switch 600V 60A 3 Pole $300.00 |
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Square D QMB3603T series 3 30 amp 600 volt 3 phase twin panelboard switch $299.99 |
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Gould ITE V7H3205 Fusible Panel Board Switch 400 Amp 240 V 125 HP 3 Pole $251.75 |
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Square D QMB362T21W series E1 30/60 amp 600 volt 3 phase twin panelboard switch $275.00 |
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Square D QMB323TD series D2 100 amp 240 volt 3 phase twin panelboard switch $275.00 |
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Square D QMB323T series D2 100 amp 240 volt 3 phase twin panelboard switch $250.00 |
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Square D QMB2210H series 2 100 amp 240 volt single phase panelboard switch $250.00 |
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Square D QMB 322-TW 60A 240V Twin Panelboard Switch $250.00 |
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GE QMR363 100A 600v 3 phase fusable panelboard switch $249.99 |
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Square D QMB361HW (QMB 3641 HW) Panelboard Switch $250.00 |
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Square D QMB323HW series E1 100 amp 240 volt 3 phase panelboard switch $250.00 |
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NEW Siemens Gould ITE 200A Panelboard Switch V7F3604MS $254.99 |
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Square D QMB3606T series 2 60 amp 600 volt 3 phase twin panelboard switch $224.99 |
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GE THFP 365 400 Amp 600 V 3 Pole Panelboard Switch $235.00 |
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Gould ITE V7E3233 Fusible Panel Board Switch 100 Amp 240 V 30 HP 3 Pole $180.50 |
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White Westinghouse FDPS363R 100 amp 600 volt 3 phase panelboard switch $199.99 |
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Square D QMB3220 series 1 200 amp 240 volt 3 phase panelboard switch $175.00 |
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Gould ITE V7F3204 Fusible Panel Board Switch 200 Amp 240 V 60 HP 3 Pole $152.00 |
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Cutler Hammer FDPWT 3211R Panelboard Switch 3P 30A 250V $175.00 |
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Cutler Hammer FDPWT 3222R Panelboard Switch 3P 60A 250V $175.00 |
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GE Spectra Series ADS36030 HD 30 Amp 600 Volt 20 HP Tandem Panelboard Switch $200.00 |
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Siemens I-T-E Panelboard Switch, 30-30A, V7B3211, NIB $200.00 |
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GE Type QMR DD2D3323 Tandem Panel Board Switch 100 Amp 240 Volt 3 Phase $200.00 |
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White Westinghouse FDPT3606 60 amp 600 volt 3 phase twin panelboard switch $174.99 |
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GE THFP364 200 A 600 V 3 P Panel Board Switch old style $195.00 |
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Type F DPW Fusible panelboard switch 600AMP 240VAC $150.00 |
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GE QMR364 200A 600v fusable panelboard switch $174.99 |
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G.E. ADS36030HD (ADS 36030 HD) Twin Panelboard *NEW* $175.00 |
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Square D LX45TS 225 Amp PanelBoard Single Phase 240 Volts Switches Panel Board $189.99 |
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Zinsco Uniflex UT633 60 amp 240 volt 3 phase twin panelboard switch $174.99 |
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Square D QMB206T series 1 60 amp 240 volt single phase twin panelboard switch $150.00 |
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SQUARE D CIRCUIT BREAKER PANELBOARD SWITCH ADAPTER 600V 100A 3P $175.00 |
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GE Type QMR DD2D23221 Tandem Panel Board Unit 60 A Left Side 30 Amp Right Side $175.00 |
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Square D QMB322TW series E1 60 amp 240 volt 3 phase twin panelboard switch $150.00 |
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Square D QMB221TW (QMB 221TW) Panel Board Switch *NEW* $150.00 |
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Siemens V7B3211R 30A-30A Panelboard Fusible Switch $169.00 |
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Westinghouse FDPT 2233R Twin Panelboard 2P 100A 240V $150.00 |
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Square D 100 Amp Panelboard Unit Disconnect (DIS1065) $165.00 |
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G.E. ADS36060HD (ADS 36060 HD) Twin Panelboard Switch $150.00 |
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Square D QMB362T1 series D2 30 amp 600 volt 3 phase twin panelboard switch $150.00 |
Panelboard Switch Questions
A Line-Up of Culprits That Can Harm Power Quality
From utility source to receptacle
Lightning
Can be extremely destructive if proper surge protection is not installed. It also causes sags and undervoltages on the utility line if far away. If close by, it causes swells and overvoltages. But in the final analysis, lightning is an act of nature and not in the same category as the damage man does to himself.
Utility automatic breaker reclosure
Causes short duration sags/ outages, but better than the alternative, a longer-term outage.
Utility capacitor switching
Causes a high-energy voltage disturbance (looks like an oscillating transient riding on the wave). If the cap bank is near the facility, this transient can propagate all through the building.
Commercial high rises without enough distribution transformers
Trying to cut corners in the wrong places; running 208V feeder up twenty stories is not the road to PQ.
Gen-sets not sized for harmonic loads
Excessive voltage distortion affects electronic control circuits. If SCR converter loads are present, notching can affect frequency control circuits.
Applying PF correction capacitors without considering the effects of harmonics
Harmonics and caps don’t mix. Those bulging capacitors are crying for help.
Inrush currents from high torque motor loads started across-the-line
Causes voltage sags if the load is too large or the source impedance too great. Staggered motor starts can help.
Undersized neutrals at panelboard
In the era of the 3rd harmonic, neutrals can easily carry as much current or more current than the phase conductor. Keeping them undersized leads to overheated lugs, potential fire hazards and high Neutral-Ground (N-G) voltage.
Running power and signal cables together
Think of the signal cable as a single-wire transformer secondary and the power cable as the primary. The opportunities for coupling are endless.
Loose conduit connections and lack of green wire grounding conductor
Causes open or high impedance ground circuit. Not good for PQ or safety.
Shared neutrals on branch circuits
Causes load interaction and overloaded neutrals.
Laser printers and copiers sharing branch circuits with sensitive loads
Guaranteed periodic voltage sags and switching transients.
Miswired receptacles (N-G swapped)
Hard to believe, but they are out there in quantity. Guaranteed to put return currents on the ground conductor and create a noisy ground.
Data cables connected to different ground references at each end
Ouch! Shows up as voltage between equipment case and the data cable connector.
Hi-frequency noise
The most effective high frequency grounding technique is the installation of a Signal Reference Grid (SRG).
And in a class by themselves…
Isolated ground rods
They’re a safety hazard because the earth is a high impedance path and will prevent enough current from flowing to trip the breaker. They also cause ground loops; after all, every electron still has to go back where it came from. One of the great mysteries of PQ is how some manufacturers get away with insisting that their equipment warranty is void unless an isolated ground rod is installed. My auto mechanic was so inspired by this practice that he now warranties every car he works on unless it’s driven.
Illegal N-G bonds
Guaranteed to put return currents on ground. A common enough problem that the Union of PQ Consultants wants to charge piecework rates—say, a dollar for every N-G bond found. They’d all get rich. Not only is it a PQ problem, it’s a plumbing problem. Circulating ground currents cause corrosion of water pipes. That explains why you can never find the electrician that put in those N-G bonds—it’s all being done on the sly by the plumbers. Guaranteed employment, as if they needed it.
Fluke Corporation offers an extensive range of power quality test tools for troubleshooting, preventive maintenance, and long-term recording and analysis in industrial applications and utilities. For more information on Fluke Predictive Maintenance Products and Services go to http://www.fluke.com/pdm
About the Author
A graduate of Oakland University (Rochester, MI), Steve Glad is a writer with Structured Information (http://www.strucinfo.com/) in Needham Heights, MA. He frequently writes about industrial technology topics.
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