ELECTRICAL RATING			click to enlarge
Current:	440 Amperes
Voltage	25,000 Volts
The above are coupler ratings only. Operating ratings must be based on cable capacity.
Unit Electrical Engineering Ltd. manufactures a high voltage trailing cable couplers rated up to 25,000 Volts AC and up to 440 Amperes.

Equipment in large mining operations often requires a high voltage power supply. When this voltage is combined with large fluctuating currents, safety, efficiency and reliability are priorities. UEE manufactures a cable coupler system, rated for 25,000 volts 440 amperes, especially designed to meet the demands of these large operations.

Safety is the highest priority when handling high voltage cable couplers, so when designing this coupler system, UEE concentrated on these aspects:

The system’s design conforms to CAN/ CSA M421 standards by incorporating a pin arrangement where "the ground pin makes first and breaks last’ and ‘the pilot pin makes last and breaks first". This ensures the supply breaker is not operated until the coupler is grounded and phase contacts have connected. (Proper "lockout" procedures are required.) UEE uses a shield coating that confines the dielectric field to the insulation. Thus reducing the possibility of electric shock due to deterioration of the insulators. The four-point eyebolt locking system provides quick, secure and watertight coupler connection.

These features, plus others, make the UEE Couplers convenient to use by providing maximum flexibility, reducing downtime, and improving overall economics. Reliability of this system was achieved by basing design features on experience with field cable repair. Potential features and benefits were identified and incorporated into the coupler design.

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FEATURES & BENEFITS		APPLICATION
Rigid, sand-casted aluminum housing makes the coupler light and durable. Individually replaceable parts reduce the cost of complete coupler assembly replacement. Shielding of the phases reduces the possibility of damaging, high energy, phase to phase faults. Use of a unique “collet system”* for phase wire terminals ensures a simple and secure connection for low contact resistance and good heat transfer. (this system replaced set screw arrangement & soldering of wire) Entrance fitting, consisting of a cable clamp and a seal arrangement, provides a watertight and secure cable grip. Heavy duty pilot pin and socket ensure positive low resistance path for control signal. Cable adapter provides stress control and air free seal on cable wire termination. All copper parts are silver-plated to increase conductivity and prevent conductor oxidation. All stainless steel hardware for long life and reliable assembly and disassembly. Connector assembly is interchangable with other North American manufactured plugs. "New" 4-point configuration of the eye-bolt system uses two eye-bolts for separating coupler bodies. "New" coupler body incorporate two handles that allow for easy handling when connecting/disconnecting couplers. * patent issued in Canada / USA / Australia		This high voltage trailing cable coupler system is used in open-pit and underground mines, connecting electrical, mobile distribution systems and equipment rated up to 25,000 Volts.
		STANDARDS
		CAN/CSA M421 Tested to IEEE Std. 386-1995 (Separable Insulated Connector Systems for Power Distribution Systems)

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SECTORS

Mining & Quarry


Underground


Oil & Gas

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