Ampcontrol EL500S-1-60ID Zero Sequence Leakage Current Transformer

Ampcontrol 101658 / EL500S60 / EL500S-1-60ID Current Transformer
I. Product Description
Item Number: 101658
Standard Model: EL500S/60 (EL500S60)
Full Identification: EL500S-1-60ID
Manufacturer: Ampcontrol (Australia, a professional brand for coal mine and industrial residual current protection)
Product Type: Zero-sequence leakage current transformer (toroidal core-through residual current transformer)

Core Specifications
Window Inner Diameter (ID): 60 mm (cable-through bore diameter)
Turns Ratio: 100:1 (primary 500mA leakage current, secondary output 5mA)
Installation Type: Panel-mounted (non-DIN rail)
Terminal Connections: S1, S2 bolt terminals (connect to ELM/ELD/ELV leakage relays)
Compatible Host Relays: ELM V2, ELD V3, ELV, MPA3 series residual current protection relays
Standard Compliance: Meets AS/NZS 2081 Australian mining safety standard for electrical leakage
Operating Temperature Range: -20°C to +70°C
Insulation Voltage Withstand: Industrial-grade EMI resistance, specifically designed for high-interference mining environments

Model Naming Explanation: EL500S-1-60ID
EL500: 500mA range residual current transformer series
S: Split-core toroidal sensor (Toroid Sensor)
1: Standard 100:1 turns ratio
60: Through-hole inner diameter of 60mm
ID: Inner Diameter designation

Key Features
Mining Explosion-Proof Design: Specifically engineered for underground coal mining, belt conveyors, and mobile substations in Australia, suitable for Class I explosion-proof environments with gas and dust hazards.
High-Precision Leakage Detection: Combined with relays, enables stepwise leakage tripping from 30mA to 2.5A, providing dual protection against electric shock and equipment insulation faults.
Circuit Diagnostic Function: When paired with ELM/ELD relays, continuously monitors transformer wire breakage; immediate alarm and shutdown upon disconnection, preventing protection failure.
Wiring Requirements: Total resistance between the transformer’s S1/S2 terminals and relay must be <1Ω; use thick shielded cable for long runs.

Series Comparison (for easy selection)
Table
Part No. Model Inner Diameter Installation Method
115438 EL500S/25 25mm DIN Rail
101658 EL500S/60 60mm Panel Mount
115430 EL500S/85 85mm Panel Mount
101656 EL500S/112 112mm Panel Mount

Typical Application Scenarios
Low-voltage power distribution and leakage protection for belt drive motors in underground coal mines
Insulation monitoring for mobile substations in ports and mines
Personnel electric shock protection for large industrial production lines and heavy equipment
Residual current monitoring for high-power distribution cabinets in public buildings