Shore Power Static Frequency Converter Specifications And Data

Name: Shore Power Static Frequency Converter
Brand: Nepson Industrial

Product Overview

What This Unit Does

A static frequency converter sized for quayside shore connection, from 1000 kVA to 4000 kVA. It takes the local port supply and delivers a clean IT system output at 50 Hz, 60 Hz or 400 Hz so a berthed vessel can shut its auxiliary engines down. Container type units are rated IP65 for the quay, indoor type units are rated IP32 for a substation room.

Key Benefits

Lets a vessel stop burning fuel at berth and run on shore supply
Bridges the 50 Hz and 60 Hz gap between the port grid and the ship
Output voltage regulation holds within 1 percent dynamically under stepped load
Harmonic front end chosen per site, down to 5 percent current THD with a PWM rectifier
Overall efficiency of 95 percent or better at full rated load

Problems It Solves

Port supply frequency does not match the vessel switchboard
Auxiliary engines run at berth and create emissions, noise and fuel cost
Vessel systems need an IT system with neutral insulation and tight voltage regulation

Application Scenarios

Container and cruise berth shore connection
Shipyard fit out and repair dock supply
High voltage shore connection at 6.6 kV
Naval and offshore support quays

Who It Is For

Port and terminal operators
Shipyards and repair docks
Marine electrical contractors
Vessel owners and managers

Technical Features

How It Is Built

Three phase full bridge inverter using high power IGBT switch modules or IPM intelligent power modules
SVPWM space vector pulse width modulation
Instantaneous output voltage waveform control
Switching frequency 3.6 kHz to 6 kHz with 5 MHz fibre driven gate transmission
TMS320F28335 master processor running at 150 MHz
Third order sinusoidal filter at the inverter output
10.4 inch 1024 x 600 high definition touch screen
Trip protection on input and output phase loss, under voltage, over voltage, over current, short circuit, DC bus over voltage and reverse power
Inverse time trip on sustained over current and instantaneous peak current limiting

Shore Power Static Frequency Converter detail

Specifications

Published Data

Every figure below comes from the manufacturer data for this model family.

Capacity	1000, 1250, 1600, 2000, 3000 and 4000 kVA
Ambient Temperature	-10 to 45 degrees C
Relative Humidity	0 to 95 percent
Protection Class	Container type IP65, indoor type IP32
Cooling	Container type air conditioned, indoor type forced air
Altitude	Rated output continuous below 1000 m, derate above
Input Frequency	50 Hz or 60 Hz, plus or minus 10 percent
Input System	IT system or TN-C-S system
Rectifier	6 pulse, 12 pulse or PWM
Input Power Factor	6 pulse 0.90 or better, 12 pulse 0.96 or better, PWM 0.99 or better
Input Current THD	6 pulse 35 percent or less, 12 pulse 6 percent or less, PWM 5 percent or less at full load
Output System	IT system with neutral insulation
Rated Output Line Current	1312 A at 440 V for 1000 kVA, up to 5249 A at 440 V or 350 A at 6.6 kV for 4000 kVA
Output Frequency	50 Hz, 60 Hz or 400 Hz, accuracy 0.01
Frequency Stability	0.01 percent or better from no load to full load
Static Voltage Regulation	0.5 V or less
Dynamic Voltage Regulation	Within 1 percent on stepped load, within 3 percent on 100 percent load step
Output Voltage THD	1 percent or less on no load or linear load
Output Voltage Imbalance	Less than 1 percent
Phase Angle	120 degrees plus or minus 0.1 degree
Overload	125 percent for 1 minute, alarm and cut off at 150 percent
Overall Efficiency	95 percent or better at full rated load
Noise	55 dB(A) or less
Container Dimensions	6058, 9000 or 12192 mm long x 2438 x 2896 mm
Indoor Dimensions	4300, 9400 or 12000 mm long x 1500 x 2300 mm
Weight	4 to 25 t depending on rating and housing
Withstand Voltage	Low voltage 2500 VAC for 1 minute, high voltage 42 kVAC for 1 minute
Cold Insulation Resistance	100 megohm or more measured at 1000 V

Manufacturing Process

From Cabinet To Tested Unit

Container or indoor cabinet fabrication

Rectifier and IGBT inverter stage assembly

Transformer and sine filter integration

Touch screen control commissioning and full load test

Quality Control

Low voltage withstand test at 2500 VAC for one minute with leakage below 10 mA
High voltage withstand test at 42 kVAC for one minute
Cold insulation resistance checked with a 1000 V megohm meter
Protection trip values set and verified before dispatch

Certifications

CE
RoHS

Customisation Options

Input and output voltage levels set to the port and vessel requirement
Rectifier topology selected against the harmonic limit on site
Container type for quayside installation or indoor type for a substation room
Protection trip values configurable on the touch screen

Comparison

Against The Alternatives

Running ship auxiliary engines at berth	Shore conversion removes fuel burn, exhaust and vibration at the quay for the whole stay.
Rotary frequency converter set	A rotary set carries rotating mass and maintenance. The static converter holds frequency to 0.01 accuracy with no wearing parts.

Use Guide

Getting It Right On Site

Confirm the vessel side voltage, frequency and system earthing before sizing
Choose the rectifier topology from the harmonic limit imposed by the port authority
Derate the output above 1000 m altitude
Use the container type where no substation space is available on the quay

FAQ

Questions Buyers Ask

What is the largest converter you build?

4000 kVA, with a rated output line current of 5249 A at 440 V or 350 A at 6.6 kV.

How accurate is the output frequency?

Output frequency accuracy is 0.01 and stability is within 0.01 percent from no load to full load.

Can it be installed outdoors?

Yes. The container type is rated IP65 and is fully air conditioned. The indoor type is IP32 with forced air cooling.

How loud is it?

Noise is 55 dB(A) or less.

How much does it weigh?

From 4 t for the smallest indoor unit up to 25 t for the largest container unit.

3 Phase Static Transfer Switch

The STS is built with two independent power inlets. The load normally runs from the primary source. If the primary source fails, the secondary source...

View Specifications

HPA Programmable AC Power Source

The HPA series is a variable frequency AC power source that reproduces the voltage and frequency used in any country on a single bench. It delivers...