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Trailing Cable Couplers

Quick-connect trailing cable connectors provide safe and convenient power distribution solutions for all mine needs

Typical Mining Applications

Unit Electrical Engineering Ltd. manufactures a complete family of quick-connect fittings for trailing cable systems covering the full range from low to high-Voltage systems.

The design of each product line is backed by extensive mining field experience, laboratory testing, and customer feedback.

All UEE quick-connect fittings are proven to increase safety, reliability, and convenience while reducing inventory costs and equipment downtime in extreme conditions found in mining and other industrial settings.

UEE Quick-Connect Coupler System

Safety

Designed with safety in mind, UEE quick-connect fittings meet the very strict requirements of CSA standard CAN/CSA-M421, all UEE couplers have:

• a mechanical fastening arrangement to join the connector to its cable with a tensile strength greater than that of the cable

• strain relief devices suitable for the intended portable cable

• a means to seal out moisture• a means to mechanically lock the coupler• a conductor arrangement whose ground

conductors make before and break after the phase conductors and ground-check circuit that makes after and breaks before the phase conductors

• provisions for ground-fault protection and ground-conductor monitoring at the supply source.

Since the ground contacts make first and break last, there is always a path to ground to clear fault currents.

Since the ground-check contacts make last and break first, the ground-check monitoring system disconnects power at the first indication that a quick-connector fitting is being removed.

When used with a ground-check monitoring system, the phase conductors are never energized when the quick-connect fittings are disconnected.

Conductor Arrangement

To increase the safety and reliability of our medium- to high-voltage couplers (8 kV to 25 kV), UEE has incorporated a complete phase isolating ground shield system to eliminate phase-to-phase faults. With the inter-phase ground shield, any fault current passes directly to ground, greatly reducing catastrophic phase-to-phase failures.

• Fault current limited to size of system neutral grounding resistor

• Standard 8 kV product utilizes cast aluminum ground shield

• Special 8 kV, 15 kV, and 25 kV products rely on a high-tech conductive skin on individual phase insulators for the ground shield

• Not used on 1.1 kV product

Inter-Phase Ground Shield

Conducting Parts

All major electrical conductors are manufactured out of 99.9% pure copper or high-quality copper alloy (brass).

• Pure copper for exceptional electrical and thermal traits.

• High-quality brass used for parts that require greater mechanical resilience, such as sockets and collets.

• Conductors are electroplated with a silver coating to maximize conductivity and minimize friction between conductors.

Male, pin-type conductors have stepped profiles to ease insertion into female, socket-type conductors. Non-collet conductors (standard 8 kV product line) utilize brass set-screws to eliminate non-ideal thermal effects and they also have fine-pitch threads to limit loosening.

Stepped Design

Select UEE couplers utilize our patented collet phase wire securing system that eliminates set-screws altogether.

• No set-screws that can loosen.• No messy solder.• Uniform contact force for simple, reliable, low

resistance connection.

Collet System

Bodies and Fittings

UEE coupler bodies and fittings are manufactured out of high-quality aluminum alloy.

• Cast in our own non-ferrous foundry.• Machined to exacting tolerances for perfect fit.• Light and durable: no unnecessary bulk or weight.• Entrance fitting matched

to customer cable.• Stainless-steel and brass

fittings for corrosion resistanceand durability.

Aluminum parts will not rust, but they can be coated with a rugged polyester powder-coat finish for identification purposes. Various colors and color combinations are available.

Powder-Coat Finish Available

Entrance Fittings

UEE entrance fittings provide an entirely waterproof cable-to-coupler interface that also mechanically secures the coupler to the cable.

• Entrance fittings seals use gaskets and hose-clamps or compression grommets.

• Customized for the specific characteristics of the customer’s cable.

Eye-Bolt Locking Mechanism

To ensure that all coupler connections meet the mechanical locking requirement of CAN/ CSA-M421, stainless-steel eyebolts and brass nuts secure parts while in use.

The UEE low-voltage cable coupler system is ideally suited to mine/quarry, oil and gas, marine, tunneling, microtunneling, and other industrial sectors.

In addition to CAN/CSA-M421, UEE low-voltage couplers are CSA approved (certification program defined for connectors up to 600 volts).

• 160, 240, 320 Amperes• 1.1 kV A.C.• 6P Rated (water-proof /submersible)• Bronze Bodies (160 and 240 Amps)• Second ground-check (pilot) available

Low-Voltage Cable Coupler System

1.1 kV Couplers with Brass Bodies

1.1 kV Couplers in Harsh Environments

The UEE medium-voltage cable coupler system is typically used in open-pit mining applications where it reliably and conveniently connects mobile electrical distribution systems and other equipment up to 8 kV. Designed to CAN/CSA-M421, and tested to I.E.E.E. Std 386-2006.

• One-piece cast aluminum ground screen (standard models)

• One-piece phase and pilot pin insulator manufactured out of high-tech, durable plastic

• High altitude version available• 250, 400, 600 Amperes• Ground-check (pilot) wire up to 2/0• Kirk-Key interlock adapter available

Medium Voltage Coupler System – 8 kV

The UEE high-voltage cable coupler system is typically used in open-pit mining applications where it reliably and conveniently connects shovels, electrical distribution systems and other equipment up to 25 kV. Designed to CAN/CSA-M421, and tested to I.E.E.E. Std 386-2006.

• 440, 600 Amperes• 15, 25 kV A.C.• Ground-check (pilot) wire up to 2/0• Kirk-Key interlock adapter available

High-Voltage Coupler System – 15, 25 kV

Reduced air density at high altitude lowers electrical performance of equipment that relies air separation for insulation and cooling. At altitudes above 1000 meters the Voltage withstand ratings of air-gap electrical equipment must be de-rated.

Altitude (m) Voltage Withstand Correction

1000 1.0

1200 0.98

1500 0.95

1800 0.92

2100 0.89

2400 0.86

2700 0.83

3600 0.75

4200 0.70

4800 0.65

High Altitude Applications

25 kV Coupler for High Altitude

The 25 kV insulation system does not rely on an air-gap for its insulation rating or for cooling, so this product does not have to be de-rated when used in high-altitude settings.

• Unique high-Voltage siliconeinsulating system eliminatesair voids

• Suitable for high-altitude usewithout de-rating

The 8kV 400 amp high-altitude coupler has been deigned specifically for the reduced air density conditions of high altitude mining. While this product relies on an air gap for insulation and thermal control, it has been designed for higher voltages but has been de-rated for use at 8 kV for up to 5,200 meters above sea level.

8 kV 400H Coupler for High Altitude

Medium and high-voltage quick connect systems can be designed to use skid mounted junction to connect male terminated cables.

• Simplify cable inventory: cables are always male, equipment always female.

• Junction assembly is conveniently off the ground.

Skid-Mounted Junctions

Coupler Maintenance?

Trailing Cable Accessories

An Electrical Solutions Company

Unit Electrical Engineering Ltd. : ISO – 9001:2008 certified.Wismer & Rawlings Electric Ltd : ISO – 9001:2008 certified.

Latitude = 49.3387, Longitude = -119.5683 Lat = 49 degrees, 20.3 minutes North Long = 119 degrees, 34.1 minutes West

British Columbia Office: 1406 Maple Street tel: (250) 497-5254 RFQ email: rfq@uee.comOkanagan Falls, BCfax: (250) 497-6061 www.uee.comV0H 1R2 CANADA gen. email: general1@uee.com