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It's the product of experience and start to finish collaboration.
The perfect switchboard. It's what happens when your engineers and our engineers come together with the common goal of meeting your specific space, amperage and equipment requirements. And it happens every time at Ward's Marine Electric. Because from start to finish we work hand in hand with our customers. Making modifications. Adding features. Adjusting power requirements. To make certain that when the collaborative process is over, the perfect switch board is ready for sea.
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- Seamless transfer between power sources
- Load-share paralleling
- Hard logic electrical interlocking
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The standard Ward's Marine Electric switchboard is a three-phase, four-wire, grounded neutral, split bus system.The neutral and grounding buses are common between the split-bus systems. The input circuit breakers, control and monitoring components and distribution buses are housed in separate sections. The input circuit breakers are motor-operated with push-button controls for ease of source selection and transfer.
The standard switchboard provides 'manual' load-share paralleling for the generators, and seamless transfer between a generator and shore power.** 'Manual' meaning that the command to parallel, or to seamlessly transfer, are initiated by the operator by pushing the circuit breaker 'CLOSE' push button. The actual frequency adjustment of the oncoming source, and the closing of the circuit breakers for either parallel operation or seamless transfer, is accomplished by standard paralleling and load-sharing components and/or the seamless transfer control logic from a shore power conversion system.
Hard logic electrical interlocking is utilized for preventing two power sources
from coming together other than for synchronized parallel operation or seamless
transfer between sources. Reverse power protection for each generator, and load
shedding circuits for each bus, is provided.
The switchboard visible and operable components are ergonomically arranged
in a manner that allows for easy comprehension and operation. All necessary components
for operation, control and distribution of electrical power from on-board
generators and shore power are contained in a freestanding aluminum enclosure.
The standard compact enclosure configuration is as as follows:
(Other configurations available.)
- The enclosure is all aluminum, 3-sections wide, base mounted, front ventilated with a drip proof cover and measure 54' W x 19' D x 66' H.
- Each enclosure section has one front-opening upper door and one front-opening lower door
(two total) requiring a key or other tool to open. Each door is fitted with a door stay to prevent
door movement when open.
- The enclosure is configured such that access for all connections and maintenance is from
the front through the existing doors.
- Cable entry is from either the top or bottom of the distribution sections, however, limited
to the bottom of the input sections.
- An insulated safety handle is front-mounted running the full width of the enclosure.
- The finish is two-part polyurethane,'Matterhorn White'.
The standard input circuit breaker configuration is as follows:
(Other configurations available.)
- The input circuit breakers are molded-case, 400AF
(Amp Frame).
- The available generator capacity is between 40kW to 100kW
at 208vac, up to 175kW at 400vac, and up to 200kW at 480vac, all at 0.8 P.F.
- The available shore power conversion system capacity is 50kVA to 250kVA.
- Three motor-operated source-input circuit breakers are provided, one each for generator
1 and generator 2 and one for the shore power conversion system. Other power
input configurations are available.
The standard power bus configuration is as follows:
(Other configurations available.)
- The power-bus system is a 3-phase, 4-wire system split-bus (2 buses) for safety and
redundancy with a common ground and neutral bus serving both buses.
- The power bus is insulated tin-plated electrolytic copper bus bar, UL recognized, 105° C,
flame retardant VW-1, self-extinguishing to UL 94 VO and UL rated at 426 amps.
- The Generator 1 and Shore Power input circuit breakers shall be connected to power
bus 1; the Generator 2 input circuit breaker is connected to power bus 2.
- The power bus system is arranged so that the current at any point in the bus will never
exceed that of a single generator.
- A molded-case bus-tie switch (with no overload elements) connects the two power buses.
- The power bus is appropriately braced to withstand vibration and the maximum
mechanical forces imposed by inrush and short circuit currents.
The standard metering configuration is as follows:
(Other configurations available.)
- A voltmeter with phase selector switch is provided for each bus (2 sets).
- A frequency meter is provided for each generator (2).
- A wattmeter is provided for each generator (2).
- A synchronizing meter is provided for each generator (2).
- A ground fault current meter is provided for the bus system (1).
The standard indicator light configuration is as follows:
(Other configurations available.)
- A power available indicator light is provided for each power source (3).
- “OPEN”, “CLOSED”, and “TRIPPED” indicator lights are provided for each circuit breaker and the tie switch (3 sets).
- “OPEN”, “CLOSED” and “DO NOT CLOSE” indicator lights are provided for the tie switch. The “DO NOT CLOSE” indicator light serves to warn when conditions are
not suitable for closing the bus-tie switch, however, interlock logic prevents the switch from closing.
The standard control configuration is as follows:
(Other configurations available.)
- “OPEN” and “CLOSE” push-button switches provide for the opening and closing of each motorized circuit breaker (3 sets). These switches activate the circuit breaker
motor operator directly or indirectly by activating control circuits to perform a paralleling or seamless transfer operation.
- A push-button switch is provided for zero-calibrating the ground fault current meter by shorting the CT for this meter.
The standard distribution circuit breaker configuration is as follows:
(Other configurations available.)
- “The output circuit breakers are rail-mounted 63AF or 125AF.
- The quantities and circuit breaker AF ratings for each bus are:
- 16 – 63AF 3-pole circuit breakers.
- 10 – 63AF 3-pole and 4 – 125AF 3-pole circuit breakers.
- 4 – 63AF 3-pole and 8 – 125AF 3-pole circuit breakers.
- Other combinations of 1, 2 or 3-pole breakers that fit the available space are acceptable.
- Shunt-trip devices or other necessary distribution circuit breaker accessories reduce the number of circuit breakers available.
- The customer specifies the quantity, trip amperage, any special trip curves, any circuit breaker accessories and the circuit breaker tag text for the circuit breakers required.
Virtually any unique customer requested option or unique configuration can be met. Some options or configurations may be restricted by space availability and the base configuration of the switchboard. The following is a partial list of available options.
- Color of switchboard enclosure and/or door panels may be to customer’s choice.
- Switchboard interior lighting may be activated by opening the door.
- Generator or shore power conversion system sizes other than those listed above may be specified.Appropriately sized input circuit breakers and a larger enclosure will
then be provided.
- Digital metering is available.
- Distribution output circuit breakers in molded-case, hard-mounted styles may be specified.
- Ground-fault lights for “delta” systems are available.
- Ground-fault current alarm for “wye” systems, or resistance alarm for “delta” systems, may be specified.
- Shore inlet selector switches may be added.
- Mimic display of electrical system is available.
- Generator control panels (start-stop & instrument) may be installed in the face of the switchboard.
- Generator winding heater indicator lights are available.
- Manual paralleling with speed and voltage adjustment potentiometers may be specified.
- Automated paralleling, usually included with automation, is available.
- Several levels of automation, with touch-screen operator interface, is available.
- A generator pre-start warning alarm may be added.
- Remote switchboard alarm outputs are available.
- Remote controls are available.
- Interface components for third-party control and monitoring systems may be specified.
The standard switchboard is built to ABS classification requirements. The actual cost of ABS classification documentation, preparation and submittal is optional.The
switchboard may be built to class acceptance of any other classification society.
Switchboard start-up time allowance for one man is included in the price of the switchboard. Actual time allowance will be indicated on the switchboard quotation.
As vessel’s construction site may be a considerable distance from Ward’s Marine Electric, travel and expenses are not included in this time allowance. If additional
labor or trips are required due to circumstances beyond the control of Ward’s Marine Electric, additional labor time will be billed at the prevailing labor rate, plus travel and expenses.
It took us a lifetime to build our reputation as the marine electrical specialists.
And with every new switchboard assignment our engineers and world-class
ABYC certified electricians earn new respect for what we do and how we do it.
Always striving for perfection, and always committed to setting new standards for
the field of marine electric.
Introducing a new series of distribution panelboards from Ward’s Marine Electric
specifically designed to provide local branch circuit distribution and protection
from a central switchboard. These panels are available in 12, 24, 36 and 48
pole versions with a single-phase, threephase or DC line bus.
- Panelboards are all aluminum, rear mountable with right or left-hand opening door.
- Doors are secured with captive fasteners.
- Panelboards are 14.3” [363mm] wide and only 4.5” [115mm] deep. Heights for 12, 24, 36 and 48-pole panelboards are 14.3” [363mm], 20.2” [513mm], 26.1” [663mm]
and 32.0” [813mm] respectively and are painted with two-part polyurethane, in “Matterhorn White”.
- Panelboards are configurable for either top or bottom cable entry.
- Circuit breakers are front connectable, rail-mounted, easily changeable and available in 1, 2 or 3-pole units up to 63 amps capacity. Ample room is provided for all connections.
- Circuit breaker rails are mounted stationary to the enclosure, not to the door. Door opens and closes freely with no attached bundle of stiff wires.
- Bus capacities are 125-amp in single-phase, three-phase or DC configurations.
- All panelboards are fitted with either a neutral or negative bus and a grounding bus.
- Mains conductors are terminated directly to the power, neutral (or negative) and grounding buses. Branch circuit conductors are terminated directly to the circuit
breakers, neutral (or negative) and grounding buses. There are no intermediate terminals or other connections.
- All panelboards are supplied with surface-mounted nameplates for panelboard title and circuit breaker identification. Height of the circuit breaker nameplates match the
height of the 1, 2 or 3-pole circuit breakers installed in the panelboard. Nameplates are reverse engraved to the customer’s specifications.
Specifications subject to change without notice. Consult Ward’s Marine Electric for latest configuration.
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