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.
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When it comes to building renovation our FDB 2 multiway modular RCD/RCBO panel is ideal for upgrade and maintenance projects in the commercial/industrial sphere.
This modular range of general purpose earth leakage protection units comes complete with overload and short circuit protection. (It is also approved by Network Rail for use in DC Electrified areas). Featuring sold state electronic circuitry for stability and immunity from spurious tripping, the range features different permutations of rating in each voltage range. Standard units are supplied in steel, surface mounting enclosures with RCD test button and MCB toggle accessible at front of unit.
The 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 400V 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 FDB Online Store.
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EMGUARD Earth Line Monitors – 110V, 240V and 440V
The FDB Emguard range comply with BS4444 over an Impedance range of 1 – 20 ohms (adjustable). They have Fail-safe operation with LED status indication and each unit is fully encapsulated and housed in PA6 enclosure for convenient chassis mounting with the hardware supplied. These units require an end of line terminator – also available from our Online store.
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As long term contractors to Southern Rail/GTR, K H Engineering Services find themselves in frequent need to deal with protection of mains power equipment within areas of high DC power usage. This specialist protection is required for all electrical mains supplies likely to be used by the public – such as socket outlets, ticket machines, hand driers, water heaters and more recently electric vehicle charging points to BS 7671 in station car parks.
The problem of course is to eliminate nuisance tripping from induced currents which would activate a cut-off in normal equipment. Fortunately for K H Engineering Services, our FDB 11 from is a proven DC immune solution to this problem and on the DC approved list which makes it ideal for use on the Southern Line and other lines from North London to Kent and through to Portsmouth where they are recognised electrical maintainers.
Explained Qualifying Supervisor Tony Mace: “We have found the FDB 11 units excellent for all our installation work, whether it be renovation or new build. We have always found the sales team at FDB to be efficient, timely, very competitive and always helpful.”
“The FDB 11 has proven itself extremely reliable and flexible since we can readily obtain it in a range of standard ratings which suit our need for 16A or 32A current capacity with 30mA trip DC immune RCDs. When required we can also get them in multiple housings.”
Follow the KH Engineering example and contact us now to discuss your power protection needs.
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