Fused Disconnect
Todays deals on Fused Disconnect?
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siemens allis 15kv disconnect switch fused 600 amps $1,800.00 |
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Square D H365NR 400A 600V Nema-3 “Rainproof” Fused Disconnect $1,600.00 |
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Square D STAINLESS H364DSVW 200 amp Fused Safety Disconnect Switch Nema4X H364DS $1,249.00 |
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Square D STAINLESS H364DSEI 200a Fused Safety Disconnect Switch Nema 4X H364DS $1,249.00 |
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SQD Square D H-362-DX 60 Amp Fused Disconnect $1,160.00 |
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Square D STAINLESS HU364DS 200 amp Non-Fused Safety Disconnect Switch $1,199.00 |
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Siemens STAINLESS HNF364S 200a Non-Fused Nema 4X Safety Disconnect Switch $1,199.00 |
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Square D STAINLESS HU364DS 200 amp Non-Fused Safety Disconnect Switch $1,099.00 |
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GE Stainless THN3364SS 200 amp Non-Fused Safety Disconnect Switch $1,098.00 |
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SQD Square D H361DX 30 Amp Fused Disconnect $1,045.00 |
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ITE/Siemens F321SS 30 Amp Fused Stainless Disconnect $960.00 |
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STROMBERG OESA-F200JT6 600V 200A 3PH 20-60HP FUSE DISCONNECT $889.99 |
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SIEMENS DISCONNECT HNF365, 400 AMP, 3 POLE, 600VAC. NEMA 1, NON-FUSED $850.00 |
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400 amp 600 volt fused disconnect with fuses 3R outdoor $899.00 |
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“NEW” SQUARE D DISCONNECT HNF365, 400 AMP, 3 POLE, 600VAC. NEMA 1, NON-FUSED $850.00 |
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Cutler Hammer DH662UDK 60 Amp, 600 Volt, Non-Fused, Nema 3R/12 Disconnect $800.00 |
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Square D HU661AWK 30amp 6p 600v non fused disconnect safety switch new ! Nema 12 $850.00 |
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Siemens HNF661J 30amp 6pole 600v non fused disconnect safety switch new! Nema 12 $850.00 |
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SQD Square D HU361-DX 30 Amp Non Fused Disconnect $795.00 |
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H364DS SQUARE D Fused Disconnect 200 Amp 600V 3P/4W $800.00 |
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Siemens STAINLESS HF363S 100 Amp Fused Nema 4X Safety Disconnect Switch $799.00 |
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MOELLER COMBINATION FUSED DISCONNECT 200V/240V/480V/600V 100% NEW #8 $750.00 |
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MOELLER COMBINATION FUSED DISCONNECT 200V/240V/480V/600V 100% NEW #7 $750.00 |
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MOELLER COMBINATION FUSED DISCONNECT 208V/240V/480V/600V 100% NEW #4 $750.00 |
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CH 4105H4461H-4 30 Amp, 600 Volt, Fused, Nema 4 Disconnect $750.00 |
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Crouse Hinds NST1018F W3036 Nema 4X 30 Amp 600 Volt Fused Fiberglass Disconnect $700.00 |
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GE Heavy Duty fused disconnect 400 amp 3-phase NP1578002B includes fuses $750.00 |
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MOELLER COMBINATION FUSED DISCONNECT 208V/240V/480V/600V 100% NEW #3 $700.00 |
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ALLEN BRADLEY SWITCH FUSE DISCONNECT 194R-NJ100P3 $650.00 |
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ITE F222H 60 Amp, 240 Volt, Fused, Nema 12 Disconnect $630.00 |
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Siemens HF364 200 Amp, 600 Volt, 3 Pole, Fused Disconnect $600.00 |
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ITE NF353SS 100 Amp, 600 Volt, Non-Fused, Stainless Steel Disconnect $600.00 |
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H363DS SQUARE D Non-Fused Disconnect 100 Amp 600V 3P/4W $600.00 |
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Cutler Hammer DH362FWK 60 Amp, 600 Volt, Fused, Stainless Steel Disconnect $580.00 |
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Siemens HF364 200 Amp, 600 Volt, 3 Pole, Non-Fused (ALTERED) Disconnect $550.00 |
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ALLEN-BRADLEY 194R-NJ200P3 200A 600VAC-250VDC 3PHASE 25-60HP FUSE DISCONNECT $515.99 |
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Square D H362DS 60 Amp, 600 Volt, Fused, Nema 4/4X Disconnect $550.00 |
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CH Westinghouse WHFN261 30 Amp Fused SS Disconnect $540.00 |
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Westinghouse WHFN361 30 Amp Fused SS Disconnect $540.00 |
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Square D H364N 200 Amp, 600 Volt, Fused Disconnect $500.00 |
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Allen Bradley 1494F-JNJ622 200 Amp, 600 Volt, Fused, Nema 3R/12 Disconnect $500.00 |
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CH Cutler Hammer DH324FRK 200 Amp Fused Disconnect $480.00 |
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Square D H322DS 60 Amp, 240 Volt, Fused, Stainless Steel Disconnect $500.00 |
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Siemens HF324NR 200 Amp, 240 Volt, Fused, Nema 3R Disconnect $460.00 |
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“NEW” SQUARE D DISCONNECT HF363R, 100 AMP, 3 POLE, 600VAC. NEMA 3R, FUSED $495.00 |
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“NEW” SQUARE D DISCONNECT HF363R, 100 AMP, 3 POLE, 600VAC. NEMA 3R, FUSED $485.00 |
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Siemens Sentric NP Fuse Switch Disconnect 3NP427 $475.00 |
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Sprecher+Schuh Fused Disconnect Swtch L10-NJ200P3 200A NIB $500.00 |
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Non-fused disconnect 2 pole 400 amp. unused $500.00 |
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Sprecher+Schuh Fused Disconnect Swtch L10-NJ200P3 200A $500.00 |
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Cutler Hammer DH364FGK 200 Amp, 600 Volt, Fused Disconnect $440.00 |
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WAGO, FUSED DISCONNECT TERMINAL BLOCK 281-622/281-541, LOT OF 80 $490.00 |
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Square D #H362DS, Stainless Steel Disconnect, 60a, 3pole, 600v, Fused, NIB $480.00 |
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Killark #XEDS-30, Explosion Proof No Fuse Disconnect, 3P, 30A, 600V, NEW $470.00 |
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SQ D Square D H361DX 30 Amp Fused Disconnect Safety Switch 480V $449.95 |
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Square D #HU364AWK, Nema 12. 200 amp, 600 v, 3 pole, no fuse disconnect, NEW $450.00 |
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CH Westinghouse HF423N 100 Amp Fused Disconnect $435.00 |
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Cutler Hammer DH364NGK 200 Amp, 600 Volt, Fused, Nema 1 Disconnect $420.00 |
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H361DS SQUARE D Fused Disconnect 30 Amp 600V 3P/4W $450.00 |
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ITE/Siemens NF354 200 Amp Non Fused Disconnect $400.00 |
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Cutler Hammer DG325U 400 Amp, 240 Volt, Non-Fused, Nema 1 Disconnect $400.00 |
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Allen Bradley 1494F-JNR622 200 Amp, 600 Volt, Fused, Nema 12 Disconnect $400.00 |
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GE Stainless TH3362SS 60 amp Fused New Nema 4X Safety Disconnect Safety Switch $459.00 |
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Thomas & Betts HD364NFTB 200 Amp, 600 Volt, Non-Fused Disconnect $405.00 |
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Siemens Sentric NP Fuse Switch Disconnect 3NP407 $425.00 |
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Siemens HNF364 200 Amp, 600 Volt, 3 Pole, Non-Fused Disconnect $400.00 |
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GE Stainless THN3362SS 60 amp Non-Fused New Safety Disconnect Switch $449.00 |
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Eaton ECN1611AAC Combination FVNR Starter w/ Fused Disconnect $409.99 |
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Allen Bradley 1494G-EF3H2 200 Amp, 240 Volt, Fused, Nema 12/3R Disconnect $400.00 |
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NIB SQUARE D FUSED DISCONNECT SWITCH H224N F05 200 AMP $389.00 |
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Westinghouse HFN324 200 Amp, 240 Volt, 3 Pole, Fused Disconnect $399.00 |
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Allen Bradley 1494F-ASR633 30 Amp, 600 Volt, Fused, Nema 4 Plastic Disconnect $400.00 |
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Square D H364N 200 Amp, 600 Volt, Fused Disconnect $375.00 |
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Westinghouse WHU361 30 Amp, 600 Volt, Fused, Stainless Steel Disconnect $400.00 |
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Westinghouse WHFN361 30 Amp, 600 Volt, Fused, Stainless Steel Disconnect $400.00 |
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Westinghouse WHUN361 30 Amp, 600 Volt, Non-Fused, Nema 4/4X Disconnect $400.00 |
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Square D H321NDS 30 Amp, 240 Volt, Fused, Nema 4X Disconnect $400.00 |
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Siemens Sentric NP Fuse Switch Disconnect 3NP3376 $400.00 |
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Siemens Sentric NP Fuse Switch Disconnect 3NP3276 $400.00 |
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Siemens Sentric NP Fuse Switch Disconnect 3NP408 $410.00 |
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CH Cutler Hammer DH364UDK 200 Amp Non-Fused Disconnect $360.00 |
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H322DS SQUARE D Fused Disconnect 60 Amp 240V 3P/4W $400.00 |
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Square D H221NDS 30 Amp, 240 Volt, 2 Pole, Fused Stainless Steel Disconnect $380.00 |
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Siemens F354 200 Amp, 600 Volt, Fused Disconnect $350.00 |
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GE 316 Stainless THN3361SS316 30 amp Safety Disconnect Switch Non-Fused New $409.00 |
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HUBBELL CIRCUIT-LOCK FUSED DISCONNECT SWITCH FDS30 NICE $400.00 |
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NEW GE 60A 3 POLE 600V FUSED NEMA 4X STAINLESS DISCONNECT TH3362SS $400.00 |
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Square D 400 amp fused disconnect switch NEMA 1 with fuses $400.00 |
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“NEW” SQUARE D DISCONNECT HF364, 200 AMP, 3 POLE, 600VAC. NEMA 1, FUSED $375.00 |
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Square D HU364 200 Amp, 600 Volt, 3 Pole, Non-Fused Disconnect $350.00 |
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Square D H224N 200 Amp, 240 Volt, 2 Pole, Fused Disconnect $350.00 |
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Square D H364 200 Amp, 600 Volt, Fused Disconnect $340.00 |
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Cutler Hammer STAINLESS DH363NWK 100 amp Fused DH363WK Safety Disconnect Switch $399.00 |
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GE THN3364R 200a 600v non fused disconnect safety switch new N3R $395.00 |
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Siemens HNF361S 30amp 600v non fused ss stainless disconnect safety switch new ! $395.00 |
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Siemens HNF364 200amp 600v non fused disconnect safety switch new! $395.00 |
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H323DS SQUARE D Fused Disconnect 100 Amp 240V 3P/4W $380.00 |
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Square D HU363RB 100amp 600v non fused disconnect safety switch N3R Nema 3R New $395.00 |
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Cutler Hammer DH363FRK 100 Amp Fused Disconnect, NEMA 3R, 600 Volt $360.00 |
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Square D HU364 200amp 600v non fused disconnect safety switch new ! $390.00 |
Fused Disconnect Questions
Low-voltage Fuses and Circuit Breakers
The paper is attempting to describe in a simple way the physical background of low-voltage fuses and circuit breakers operation in conditions of high short-circuit currents. Further, it attempts to draw some conclusions from their operational peculiarities, that substantially influence the practical application of fuses and circuit breakers.
Introduction
Under the slogan “Safety First” are presented in the following discussion low-voltage fuses and circuit breakers as the most important and most frequent protection elements in electrical engineering, viz. electrical installations.
The basic physical and electrical processes in short-circuit conditions are shown. The paper attempts, on the one hand, to demonstrate the advantages and drawbacks of both protection elements, and, on the other hand, to indicate the way of thier interaction, with particular emphasis on their operation in the domain of high short-circuit currents.
First of all, the following criteria have to be observed when selecting the protection elements:
- Safety
- Reliability
- Quality
- Diversity
- Economy
An electrical installation has to be designed and manufactured in such a manner to allow the protection device to cut an electric circuit only when it is really necessary. But at that time with an absolute reliability! When a fault arises, the protection device, whether a fuse or a circuit breaker, must disconnect an electric circuit before a damage on installation, power source or consumer occurs.
Advantages and drawbacks of fusible cut-outs – fuses
As said above, when evaluating advantages and drawbacks of an individual protection element, the above mentioned criteria have to be observed:
Safety:
* High degree of current limitation,
* Low values of transient integrals,
* No leaking out ionizing gases,
* Low power losses.
Reliability:
* After the cut-out the fuse cartridge is replaced, the properties of the new one are fully available,
* Aging resistance,
* Simple use.
Quality:
* Today’s production is highly automated, which ensures small deviations in technical characteristics of the whole quantity of products from the regular production.
Diversity:
* Use in low- and high-voltage networks,
* Protection of electronic apparatuses and devices.
Economy:
* In comparison with its capabilities and dimensions as well as price, this is the most economic solution.
The drawbacks of the fusible cut-outs are mainly due to the following facts:
* They have to be replaced when a fault occurs, which usually means a specific time without power;
* More difficult setting of the I-t overload characteristic, which depends on the physical processes in the fusible element.
Advantages and drawbacks of the circuit breakers
Comparison of circuit breakers by the same criteria:
Safety:
* Possibility of exact setting of the current-time characteristic;
* Otherwise large enough degree of the current limitation, still on account of economy.
Reliability:
* The truth is that modern design solutions ensure a high degree of reliability, but with time, or with the number of cut-offs the characteristics of each circuit breaker are gradually being deteriorated.
Quality:
* The same applies to quality.
Diversity
* Very wide possibility of use, at NN, SN and VN levels;
* The use of electronic in tripping circuits increases the applicability.
Economy:
* The economy appears primarily in short reconnecting times;
* The power circuit breakers involve a big difference in the product price.
The weakness of circuit breakers appears primarily through the following facts:
* At disconnection an exhaust of ionizing gases appears, that can cause various consequences in the switch cabinet;
* With the number of short-circuit disconnections a circuit breaker gradually loses its technical properties.
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