Description
The main earth fault protection relays in distributions systems, power stations & large manufacturing / processing plants can fail to detect a high impedance breakdown to earth causing hazard to human life & potential damage to plant & equipment. In these & other situations demanding extra sensitive earth fault protection, the 2P49 relay using solid state techniques, can be applied to detect earth currents down to 0.5% of the CT nominal current.
Features
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High sensitivity
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Detects phase angle imbalance
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Detects negative phase sequence
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Detects supply undervoltage
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Unaffected by frequency variations of + 5Hz
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Adjustable 5-15% out of balance setting
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Range of detection voltages & frequencies available
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No auxiliary voltage required
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Fail safe operation (Contact normally picked up)
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Filter rejects harmonics & control tones
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Size 2M28-S draw out case
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Standard heavy duty contacts
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Optional mechanical flag indication
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Optional 2s approx. time delay on drop off function
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Made in Australia
