Description
The 2C74 relay provides high speed overcurrent protection for various items of power system plant such as frame earth leakage protection of metal clad switchgear & tank earth fault protection of sub-station power transformers. The 2C74 relay is a single phase device built in a compact size 2M draw out case suitable for rack and flush mounting. Where 3 phase monitoring is required, 3 single phase units should be employed. The relay measuring element is basically an attracted armature unit of simple & rugged construction. The operating coil of this unit is energised from a transformer which is tapped to provide seven (7) current settings. Setting is achieved using a plug bridge arrangement on the front panel.
Features
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High speed operation
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High sensitivity
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50Hz or 60Hz operation
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Seven (7) current settings using a plug bridge
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Choose from 5 setting ranges
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<10ms operation at 5x setting
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Hand reset mechanical flag
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2 N/O trip contacts
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Rugged attracted armature sensing element
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Use 3 independent units for 3 phase applications
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Size 2M28 draw out case
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Made in Australia