earth fault protection

A range of Heavy Duty RCCB units from FDB for when you really have to get serious!

Our series of FDB 19 heavy duty RCCB units is designed to overcome inherent earth leakage or inrush currents, combining a variable sensitivity and time delay RCD together with a triple pole MCCB (minimum 16 KA) to provide overcurrent and short circuit protection.

With a unit of this type there is no “typical” application since it is suitable for use throughout industry from construction sites, mines and quarries to mobile plant and cranes and for the protection of stage lighting systems where thyristor spikes can trip conventional RCD’s. A standard feature of the unit is its non-fail safe operation ideal for primary breaker installations or those that are unmanned or prone to supply interruption. The standard FDB 19 series combines a variable sensitivity and time delay RCD, together with a triple pole MCCB (minimum 16KA) to provide overcurrent and short circuit protection housed in an IP65 zinc coated steel enclosure.

For example, a special STS variant of the FDB 19 series is used as a special-purpose power supply unit by the Royal Marines for landing craft such as the RM rapid-response/patrol boat. Typically RM landing craft were used to patrol the harbour approaches at Weymouth and Portland during the 2012 Olympic sailing events.

The FDB19/STS is a specially configured version of the standard FDB 19 Heavy Duty Adjustable RCCB designed to be mounted on offshore pontoons that are supplied from shore based transformers. Once moored, landing craft can plug into the FDB19 and recharge on-board batteries and ancillary equipment. Housed in GRP enclosures with glazed panel to provide sight of the various LED status indicators, the equipment comprises a 60A, 16KA MCCB feeding an electro/mechanically interlocked socket outlet. Electrical protection is provided by means of an EFU15 multi-function RCD and Emguard Earth Continuity Monitor; both manufactured in-house by FDB’s relay division. External Test and Reset buttons facilitate ease of operation and testing.

FDB 11 enclosed RCD protection unit

Our FDB electrical protection family of RCD and RCBO devices runs from the Multiway FDB 2 modular panel through the FDB 11 at 230V for general purpose building renovation upgrade and maintenance projects and the FDB 13, FDB 15 and FDB 19 3 phase units for new build installations. Also in the family is the FDB 27 MOD spec unit for aircraft or army hangers new build and replacement installations.

These proven units are a convenient option for new or replacement installations offering long life and reliability – they are available from our Online store here.

Earth line protection devices from FDB Electrical

We pride ourselves on our range of AC and DC panel mounting items including RCDs, Earth Continuity Monitors and special purpose electrical protection devices compliant with BS4293 which we have available ex-stock for the specialist panel builder. These items can be reviewed and ordered direct from our Online store.

The range includes multi-range protection levels including pre-set and user adjustable types with solid state circuitry for immunity to voltage transients and DC components.

Associated core balance transformers are available in a range of sizes as is a suitable panel meter (EFU10/M) and conveniently sized RCD Test Set.

Earth line protection devices from FDB Electrical

We have been specialists in industrial electrical protection equipment for a long time now and are able to offer our proven technology in component form to panel builders wishing to configure their own systems. This FDB range includes many panel mount devices and system elements.

For example the FDB EMGUARD earth line monitor range includes 110V, 240V and 440V units – the 110V unit in particular being of interest since this is a rating not commonly offered elsewhere. The EMGUARD series comply with BS4444 and offer 1-20 ohms impedance (adjustable), fully encapsulated and housed in a PA6 enclosure ready for chassis mounting.

Other components include the EFU62 VELEM combined earth fault and earth line monitor and the VEF series variable earth leakage protection relay. The EFU series includes a combined earth fault and earth line monitor and DC earth fault monitor, this compliments the EFR range of universal earth leakage protection relays, along with matching external CTs where required.

This FDB program of earth line protection devices enables panel builders and installers to complete full electrical protection systems to their own specifications – contact us to discuss configuration or order at our Online shop.

RCD technology in the FDB11

23 June 2017
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The use of RCD electrical technology has become commonplace in all areas of building services where the safety and convenience of this type of protection is of great value – but RCDs and their “sister” MCBs often need to be housed in specialist enclosures which provide for the integration of a number of devices in a custom […]

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Panel Mounting Components

5 May 2017
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Our range of specialist panel mounting electrical protection items available at our Online shop includes RCDs, Earth Continuity Monitors and special purpose electrical protection devices  compliant with with BS4293. These enable panel builders and installation engineers to configure their own electrical protection systems within an application specific enclosure or cabinet providing appropriate environmental protection. We offer both […]

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Custom electrical protection panels

20 April 2017
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Here at FDB Electrical we specialise in high end industrial and Military spec electrical protection devices, and have many well proven standard configurations to choose from – with many available from our online store – others to order as shown on our website – but of course we often get requests for something a bit […]

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Electrical Protection and Monitoring equipment you can trust

11 February 2017
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Enclosed units – available at our Online Store Our full range of enclosed units are perfect for an “off the shelf” solution that you can rely on. Industrial RCD/MCBs Adjustable RCCBs RCCB/ECM + Socket Outlets Heavy Duty RCCBs RCD Protected Distribution Boards Range earth continuity loop monitoring units Special purpose RCD protection units to MOD Spec Interruptable” […]

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Railway spec electrical protection available online

9 December 2016
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Our Online store is fast becoming the first point of contact for many people searching for our electrical protection products and that includes many specifically intended for railway use such as:- FDB2 Multiway RCBO approved for Network Rail DC Immune Protection FDB13 (10A-32A) general purpose RCD with overload and short circuit protection approved for Network Rail […]

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FDB13 – 400V 3 phase DC immune protection

28 July 2016
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Our top end DC immune protection FDB13 unit is approved by Network Rail for use in DC electrified areas for general purpose earth monitoring, RCD/RCBO overload and short circuit protection of 3 phase 400V circuits. This ensures electrical safety protection for ancillary AC equipment without the nuisance tripping associated with induced currents from nearby high level […]

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