Merlin R

Simplex Load Banks utilize UL rated, industry leading "Powr-Web" load elements specifically designed for load banks.

The "Powr-Web" elements are conservatively operated at half the maximum temperature rating of the alloy and features a short-circuit-safe design based on continuous mechanical support of the resistor by high temperature, ceramic clad stainless-steel rods.

Ratings (typical)

• 3333W at 120V
• 4170W at 139V
• 8333 watt 240/480V
• 16,777 watt at 480V

Specifications

• Alloy: FeCrAl
• Max. continuous temp. rating: 1920°F
• Maximum operating temperature as applied in Load Bank: 1080°F
• Cool down time from operating to ambient temperature: 10 seconds

Construction

• Calibrated to specific ohm value
• All load elements are continuously supported by vibration resistant, ceramic clad, stainless steel through-rods.

The load of a Resistive Load Bank consists of a dense array of open, uninsulated power resistors mounted within a cooling air stream. Since the elements are electrically live, it is possible for a foreign object to penetrate the element array and create a short circuit of adjacent elements or a short to ground.

Since the elements are densely packed, it is possible for a short circuit, once started, to rapidly propagate through the entire element array. As a Load Bank represents a relatively large amount of power concentrated within a relatively small volume, a self-propagating, cascading short circuit would have catastrophic results.

Simplex virtually eliminates the dangers of short circuit through the use of branch circuit fuse protection of the load elements. Per NEC 110-10, protective devices shall clear a fault without "extensive damage" to the circuit components.

A Simplex Load Bank is divided into branch circuits of not more than 50 KW each.