70kw copy stamford ac brushless alternator generator for sale

  70kw copy stamford ac brushless alternator generator for sale

Profiles

1.Overload protection for safe running
2.Top quality & Easy maintenance
3.Stamford technology
4.Single bearing or Double bearing
5.Easy to be connected with power networks or other generator sets
6.4 POLE, Brushless, H class insulation, IP23, A.V.R. 100% Copper
7.Farrand Series AC Brushless alternators are confomity to GB755, IECBS5000, VDE0530,NEMA MG1-22 &
IEC34, CSA C 22.2-100standards
8.The 2/3 pitch windings avoid excessive neutral currents, ensure lw waveform distortion.
9.The alternators with SX440 or SX460 AVR, low frequency protection & exterior voltage adjustments.

MECHANICAL FEATURES

Enclosure

IP23(NEMA 1) is standard for all industrial and marine generators .

Giving drip proof protection of 60° from the vertical.Inlet air filters are available as an option on all generators,at reduced rating (5% derate) 

Shaft & Keys

All alternator rotors are dynamically balance to better than Bs6861 P.1,G2.5 for minimum vibration in operation .Two bearing generators are balanced with a half-key.

Terminal and terminal box

Standard.generators are 3 phase reconnectable with 12 ends brought out to the terminals,which are mounted on a cover at the non-drive end of the generator. A sheet steel terminal box contains the AVR and provides ample space for customers’wiring and glad arrangments. It has removable panels for easy access.

Voltage regulation

Voltage regulation refers to the change of voltage from no-load to full-load with power factor ranging from 0.8 to 1 and 4%s fluctuation of the speed of engines .Voltage is adjusted using a trimmer on the AVR .

ELECTRIC FEATURES

Insulation:

The insulation system is class ‘H’

.All wound components are impregnated with materials and processes designed specifically to provide protection against the harsh environments encountered in generator applications. Resin based materials are selected and developed to provide the high build required for static windings and the high mechanical strength required for rotating components.

Winding and electric features;

Generator stator is wound to 2/3 pitch. This eliminates triplen (3^rd, 9^th,15^th…) harmonics on the voltage waveform and is found to be the optimum design for trouble-free supply of non-linear loads. The 2/3 pitch design avoids excessive neutral currents sometimes seen with higher winding pitches, when in parallel with mains. A full connected damper winding reduces oscillations during paralleling. This winding, with 2/3 pitch and carefully selected pole and tooth designs, ensures very low waveform distortion.

Telephone interference

THF(as defined by BS4999 Part 40) is better than 2%. TIF(as defined by ASAC50.12) is better than 50.

Radio intterference

The absence of brush-gear and the high quality AVR ensure low levels of interference with radio transmissions.RFI suppression may be supplied if required .

Damper Winding

The alternators incorporate a damper winding in order to ensure good parallel running with mains network and other machines. Inserted into the shoes of the poles are the bars of the damper winding which are connected together at each end of the poles to form a closed cage. This arrangement provides the alternator with excellent damping against the torsinal vibration that occurs during changes in load and when running in parallel.

Standard

GB755,PART3of BS5000,VDE0530,UTE5100,NEMA MG1-22,CEMA,IEC34-1,CSA22.2 and AS1359.