Download marine switchboards main and aux PDF

Titlemarine switchboards main and aux
TagsElectrical Wiring Cable Relay Fuse (Electrical) Electrical Connector
File Size373.3 KB
Total Pages15
Table of Contents
                            1 Technical description
	1.1 General mechanical characteristics
		1.1.1 Framework
		1.1.2 Surface treatment
		1.1.3 Cable entry
		1.1.4 Transport division
		1.1.5 Bus bars
		1.1.6 Nameplates and labels
	1.2 General electrical characteristics
		1.2.1 Internal wiring
		1.2.2 Connection Terminals
		1.2.3 Measuring indicators
		1.2.4 Air Circuit Breakers (ACB’s)
		1.2.5 Molded Case Circuit Breakers (MCCB’s)
		1.2.6 Motor Starters
2 Supplier list for main components
3 Mode of operation
	3.1 Main switchboard
		3.1.1 Automatic operation
		3.1.2 Manual operation
	3.2 Emergency Switchboard
Document Text Contents
Page 1

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 1 of 15

Marine Switchboards
Main & Emergency Switchboards

Product Description

Page 2

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 2 of 15


Written by Checked by Approved by Rev.

Date Sign. Date Sign. Date Sign.

A 2009-08-18 KM 2009-08-18 GWJ 2009-08-19 DGL

B 2009-11-04 DGL

Document history

1. prod. Issue relase

Page 7

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 7 of 15

- Rated insulation voltage 1000 V AC

- Rated maximum operating voltage Up to 690 V AC

- Rated frequency 50 or 60 Hz, +/-5%

- Rated insulation level 3000 V rms (one min. 50Hz withstand voltage)

- Impulse withstand voltage 8 kV peak (1,2/50 micro-sec. wave)

- 1 second withstand current Up to 100 kA

- Peak withstand current 220 kA

- Bus bar rated current Up to 5000 A

The environment test is carried out by SMERI which is including: High temperature test (70ºC),
Low temperature test (-55ºC), Temperature and Humidity test (55 ºC, RH 95%), Salt spray test,
Fungus test, Inclination test (±10 º, ±15 º, ±45 º), Vibration test (0-100 Hz, ±5 m/m2) and
Enclosure protection test (IPX4)

1.2.1 Internal wiring

All wiring inside the switchboards is of flame retardant types and Ship Class Type approved. They
are flexible copper-strand insulated conductors with minimum cross section of 1.0 mm2 (2.5 mm2
For CT) unless otherwise required by certain component manufacturer. For the secondary control
circuitry, voltage grade of the wires is >400 V. For power source wires and cables connected to
mains, voltage grade of >750 V is used. For data-bus line, the suitable screen-shield multi-core
cables are used. All the wires and cables used are of tinplated cu types to avoid oxidation.

The control wires are fitted in slotted cable ducts of flame retardant type to prevent abrasion,
cutting of its insulation, excessive motion caused by vibration and for easy maintenance. All
internal wires are address marked in each end by use of printed PVC sleeve tubes. As per the
component terminal shape, suitable connecting ferrules or sleeves are used on wire and cable ends.

Page 8

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 8 of 15

1.2.2 Connection Terminals

All terminal blocks for secondary circuit are of spring-clamped type without screws. Terminals at
least enable the single wire in 2.5 mm2 cross section easily connected. The terminals used for
power incoming/ outgoing cables whose cross section > 6 mm2 will be screw fastening type.

1.2.3 Measuring indicators

Measuring indicators are provided in standard DIN 43700/IEC 61554 sizes 96x96 mm and 72x72
mm (or 48x48mm) for starters , with black frame, white scale background, black pointers (rotating
angle 90 ), black text and red-mark on nominal value. The precision class is of 1.5 and the scale
of the indicators normally has the following measuring range:

- Voltmeter 0 ~120 % of rated voltage

- Ammeter 0 ~130 % of rated current (over-current withstanding type for starters)

- Watt-meter -15 % (reverse) to approx. 130 % of rated wattage

Page 14

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 14 of 15

- Separation of alarm, control and safety protection
- Single or multiple switchboard control
- Heavy consumers start logic
- Automatic start and connect after blackout
- Automatic line frequency adjustment
- Control of diesel electric propulsion
- "Take me home mode”, control of PTI with clutches etc.
- "One touch auto sequence" automatic mode control

3.1.2 Manual operation

In normal situation the main switchboard is used in automatic operation. The manual operation is
equipped as the back-up of the automatic operation. In manual operation all the essential function
can be carried out by hand such as generator start and stop, connecting, synchronising and load
sharing (by means of synchroscope and governor switches).

Page 15

Product Description
K- ePower- Marine Switchboards

CZD0003A-11/4/2009 Page 15 of 15

3.2 Emergency Switchboard

In normal situation, the Emergency switchboard is energized from Main switchboard. When the
voltage of the MSB fails the tie-breaker between MSB and ESB is automatically disconnected, the
emergency generator set is automatically started and the emergency switchboard is energized
automatically after a total delay of max. 45 seconds (allowing for stand-by generator to connect
first). When MSB voltage restored, the emergency generator will be automatically disconnected,
and then stopped with time delay. The ESB will be renewably energized by MSB via the
reconnection of the bus tie-breaker.

Normally there is now power feed-back to the main switchboard in any occasion. Alternatively the
emergency generator can be also used as harbour generator when required. In this case a select
switch “Normal / Harbour” will be additionally furnished. In “Harbour” mode, the emergency
generator is able to inversely supply the power to main switchboard.

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