PC-D400

PC-D400 Open Frame Diesel Generating Set

A 400 kVA standby frame for plant rooms carrying motor starting and UPS load on the same bus.

  • Two thirds pitch winding to keep third-harmonic circulating current down on a four-wire system
  • Block load acceptance checked against the largest motor start in the sizing case
  • Separate excitation option where non-linear load exceeds 25 per cent of the set rating
  • Sump drain, coolant drain and battery isolator brought to one accessible face
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Specifications

Standby rating (ESP)
400 kVA / 320 kW
Prime rating (PRP)
364 kVA / 291 kW
Voltage / frequency
400 / 230 V, 3-phase, 50 Hz
Engine
6-cylinder in-line, 12.5 L, turbocharged and charge-air cooled
Alternator
Brushless, AVR regulated, 2/3 pitch, Class H, IP23
Fuel at 75% load
62.4 L/h
Sound pressure at 7 m
93 dB(A), open frame
Dimensions / dry weight
3600 x 1400 x 2050 mm / 3450 kg

Product detail

At 400 kVA the sizing question stops being about running kW and starts being about what happens in the first two seconds. This frame is specified where a building has motor starting, variable-speed drives or a UPS rectifier sharing the bus with ordinary load, and where the voltage dip during a start has to stay inside what the connected equipment tolerates.

Alternator selection

The standard alternator uses a two thirds pitch winding, which suppresses the third harmonic circulating in the neutral of a four-wire system. Where the non-linear share of the load is high, we quote a separately excited machine instead of a self-excited one, because a self-excited AVR loses its supply exactly when a distorted waveform makes it most needed.

Transient performance

Block load acceptance, voltage dip and recovery time are calculated for the specific step the installation presents, not for a nominal percentage. If the step exceeds what the frame accepts in one bite, we say so and propose either a larger alternator, staged transfer, or a soft starter on the offending motor.

Installation

The set is supplied on a bunded baseframe with anti-vibration mounts fitted. Cooling air, exhaust routing and fuel line sizing are shown on the general arrangement drawing issued with the quotation.

Emissions

[Client to confirm the emissions stage or tier required in the destination market and the corresponding engine variant.]

Enquire about this model

PC-D400 Open Frame Diesel Generating Set

Send the connected load, the starting profile and the duty class, and we will confirm the rating, the build and the shipping option.

Include the load schedule and the site conditions. The reply comes from the engineer who sizes the set.