Synchronysing Check Protection Relay

DescriptionDIN rail mounting protection relays for use in single and three phase systems. Available in 112mm x 112mm DIN rail casesApplicationFor over protection, under protection and combined under & over protection available in AC current AC voltage & frequency versions. Millivolt trip, DC voltage trip, Reverse Power, Phase sequence & Phase balance relays also available in our extensive range of protection relays..Selection GuideM200-PLL1 generator 1 bus or 2 generatorsM200-PLD1 generator 1 bus with dead bus facilityBoth units can be used on single or 3 phase systems.?Typical ApplicationsThe M200-PLL & PLD are synchronised check relays, also known as paralleling relays. They are used to ensure that two AC supplies are synchronised, frequency, phase angle and voltage have to be within preset limits. The M200-PLL can monitor either main busbar and incoming generator, or two generators. The PLL has customer adjustment of the vifferential voltage of between 10 to 30%. This voltage corresponds to 6 to 20 electrical degrees. The unit compares the input voltage and phase relationship of the busbar as to that of the generator, when the signal is within preset limits, the relay energises. The M200-PLD operates as the M200-PLL but has the additional feature of the dead bus facility. This enables the relay to energise with a generator supply only, which is a common requirement where mains failure occurs.Technical SpecificationINPUTRated value Un:57.8 < 500V ±25%Frequency:50 / 60 / 400HzBurden:< 4VA terminals marked GEN<2VA terminals marked BUSOverload:1.5 x continuous 10 x Un for 3 secondsSETPOINTRange:Adjustable 10% to 30% of nominal system voltage (6-20 electrical degrees)Repeatability:Better than 0.5% of spanDifferential:Fixed at 5%Operating time:Typically 500mSAUXILIARYBoth units are self poweredWEIGHT&CASEApprox 0.6kg. 100mm caseOrdering InformationProduct CodeSystem VoltageFrequencyOptionsM200-PLD400V50HzCal at 35CConnection Diagrams

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