DIG140/DIG142/DIG150/DIG156 — high-voltage synchronous generator 3.3–13.8 kV, up to 11,000 kVA

Description

DIG140, DIG142, DIG150 and DIG156 are the larger frame sizes of the DIG series: high-voltage synchronous generators with a power of up to 11 MVA for power stations, ships and industrial facilities. All machines are designed for voltages of 3.3–13.8 kV at 50 and 60 Hz. DIG140 develops up to 4600 kVA at 50 Hz and 5300 kVA at 60 Hz (range 2200–5300 kVA, 4 and 6 poles); DIG142 — 5800/6700 kVA (3760–6700 kVA, 4 poles); DIG150 — 7400/8500 kVA (2800–8500 kVA, 4, 6 and 8 poles); DIG156 — 10,000 kVA at 50 Hz and 11,000 kVA at 60 Hz (2690–11,000 kVA, 6, 8 and 10 poles). Multi-pole versions are intended for medium-speed engines with rotational speeds of 600–1000 rpm, and four-pole versions for high-speed engines and turbines (1500/1800 rpm). The overall range of the series is 600–11,000 kVA (up to 11,200 kVA according to the website), 380 V–13.8 kV.

DIG generators have brushless excitation with the regulator powered from an auxiliary stator winding (permanent-magnet pilot exciter is optional), which ensures a steady-state short-circuit current of more than 3 times the rated value; the regulator withstands short-circuit conditions for up to 10 s, after which over-excitation protection de-excites the machine. The digital regulators DECS100, DECS150, DECS250, DM110 and UNITROL 1010/1020 provide accuracy of ±0.5 % in island mode, reactive load sharing, and parallel operation with the grid with power factor regulation. Stator with formed coils and a 5/6 pitch, salient-pole rotor with damper winding; class F insulation with VPI. Standard protection IP23, options include filters and IP44/54/55; cooling IC01, air–air IC611/IC616 (CACA) and air–water IC81W (CACW); rolling or split sleeve bearings.

Mounting designs: IM 1001, IM 1101, IM 1005, IM 1105, IM 1205, IM 1305, IM 2401, IM 2001 and IM 2101. Sleeve bearings, depending on the frame size, rotational speed and inclination of the machine, are either self-lubricated or force-lubricated. Air–water cooling is used on ships and at steam-turbine and cogeneration stations where water is available; air–air cooling is used in dusty conditions at mines, textile mills, quarries and oil and gas fields.

Generators are designed to order (engineer-to-order) to the requirements of the project, are coupled with diesel and gas engines, steam and gas turbines of all major manufacturers, and meet the requirements of the main marine classification societies. An example of application from the manufacturer materials is generators with a total power of 17 MW for a diving support vessel. Applications: primary power stations, oil and gas and mining facilities, marine power stations and electric propulsion installations.

Technical specifications