Product Short Description
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Product Overview
Microprocessor-based, self-powered feeder protection relay designed for medium-voltage (5–15 kV) fused switchgear. Provides comprehensive protection, monitoring, and arc-flash mitigation for industrial and utility feeders . -
Electrical Specifications
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Rated voltage: 100–240 V AC/DC auxiliary or self-powered from CTs
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Frequency: 50/60 Hz ±10 %
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Current inputs: 1 A or 5 A (phase and ground)
Description
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Voltage inputs: 120/240 V phase-phase via optional VT
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Overcurrent ranges: 0.1–25 A (1 A CT) / 0.5–125 A (5 A CT)
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Trip outputs: 2 Form-C contacts, 5 A @ 250 V AC
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Auxiliary outputs: 4 programmable Form-C contacts
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Protection & Functions
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Phase overcurrent (51/50)
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Ground overcurrent (51N/50N)
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Negative-sequence overcurrent (46)
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Breaker failure protection (50BF)
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Arc-flash reduction logic with instantaneous trip
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Built-in event recorder and fault logger
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Mechanical & Environmental
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Dimensions: 177 mm H × 140 mm W × 144 mm D
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Weight: 1.8 kg (4 lbs)
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Enclosure: IP40 front, ANSI Type 1
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Operating temperature: –40 °C to +70 °C
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Certifications: UL 508, IEC 60255, CE
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Communications
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RS-485 Modbus RTU standard
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Ethernet option for Modbus TCP
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Functional Highlights
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Arc-flash mitigation reduces incident energy
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Dial-and-LED interface simplifies commissioning
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Self-powered mode eliminates external supply
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Compact footprint fits ANSI switchgear compartments
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Application Scenarios
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Industrial plant feeder protection (manufacturing, data centers)
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Metal-clad and metal-enclosed switchgear
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Mining conveyor and motor feeder protection
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Utility distribution substations
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Renewable-energy interconnection
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