Description
High impedance protection schemes are widely used for the protection of BUS bars, generators, motors & power transformers. BUS bar protection schemes utilizing electromechanical high impedance differential relays are often used due to their simplicity, reliability & comparatively low cost. While numeric high impedance differential relays are now available the application of electro mechanical schemes is likely to continue at least in the role of the Y protection scheme where duplicate protection is employed. The 1M123 system is an integrated protection scheme which overcomes the issue of space constraints on the protection panel & the problem of where & how to mount the Metrosil elements. The provision of at least one high speed multi trip relay is normally required and often a trip supply supervision element. All of these functions have been incorporated into a single tier, 4U high, 19 inch sub rack frame.
Features
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Compact single tier BUS bar protection system
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Proven electro mechanical high impedance differential scheme
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Integrated 3 Phase Metrosils
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Integrated multi trip relay
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Optional trip supply supervision
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Pre assembled & wired in 4U high 19” sub rack
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High speed operation
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High sensitivity
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Wide range of settings
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High stability
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Made in Australia
