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Stumped by the Code? Requirements for Identifying the High-Leg of a 3-Phase, 4-Wire Connected System

2013-10-15 22:36:59| Electrical Construction & Maintenance

By Mike Holt, NEC Consultant Q. What kind of marking does the Code require to identify the high-leg of a 3-phase, 4-wire delta connected system? read more

Tags: system code requirements connected

 

AC/DC Power Supplies feature 3-phase, high voltage input.

2013-10-10 14:34:12| Industrial Newsroom - All News for Today

Operating from 480 Vac, 3-phase line input, 3 kW HVI 3K Series delivers any single output voltage from 24–600 Vdc. DC-input version, which accepts any voltage from 500–800 Vdc, is also available. Units are built with 3 internal power modules, each separated by redundancy diode, which allows multiple units to be connected in parallel to achieve higher output power or N+1 redundancy. Measuring 187 x 132 x 407 mm, power supplies are cooled by built-in fans. This story is related to the following:AC To DC Power Supplies | High Voltage Power Supplies

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Parallelable 3-Phase UPS Systems suit 10-40 kVA applications.

2013-09-30 14:30:12| Industrial Newsroom - All News for Today

With true on-line, double-conversion technology achieved through IGBT and DSP control, FirstLine® PL Systems deliver 94% efficiency, 0.99 input power factor, and input current distortion of ≤1% at full load. Units can be set for 50/60 Hz frequency conversion and are intended for applications with input voltage of 208 Vac, 3-phase, 4-wire plus ground, or 220 V. Additional features include internal batteries, SNMP and Modbus communication, and paralleling circuit for redundancy or added capacity. This story is related to the following:Uninterruptible Power Supplies (UPS) |

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Teseq Offers New 100 A, 3-phase Burst Pulse CDN For EFT Testing

2013-08-09 04:21:04| metrologyworld Home Page

Teseq, a leading developer and provider of instrumentation and systems for EMC emission and immunity testing, now offers a 100 A,3-phase burst pulse coupling/decoupling network(CDN) designed for electrical fast transient (EFT) or burst testing

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Torque Controller regulates 3-phase DC motors.

2013-07-24 14:29:52| Industrial Newsroom - All News for Today

Offered as single-module solution, PW-82530N0 precisely regulates current in motor windings of 3-phase brushless DC motors. Torque loop controller provides complementary 4-quadrant operation, accommodating applications requiring precise current regulation/holding torque at zero input command. Capable of operating from -40 to +100°C, this product features 7% linearity, 3% current regulating accuracy, and 10 A output current. This story is related to the following:Sensors, Monitors and TransducersSearch for suppliers of: Power Controllers | Controllers | Torque Measuring Couplings

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