Radiator-Cooled Load Bank Description Simplex LBD Load Banks are a special form of stationary, resistive, forced air-cooled load bank which utilizes the air outow of an engine radiator for cooling of the resistive load elements. This application recovers and uses the volume and velocity of air exiting the radiator and realizes in load bank design the advantages of reduced size, complexity and cost. It may appear incongruous that “hot air” from the radiator is used for “cooling.” However, “hot” and “cold” are highly relative in this case. The air exhausting from the radiator and entering the load bank may be as hot (or cold) as 180°F. However, the load elements are heated to an average of 700°F, and, most important, the air volume and velocity is very high relative to the heat energy being dissipated by the load bank. Consequently, the critical value of “air temperature rise” is limited to a conservative nominal 100°F. Despite an apparent “hot” environment, LBD Load Banks actually operate “cooler” than comparably rated load banks with integral cooling fans which are installed in the relative “cold.”

Radiator-Cooled Load Bank • Page 2 Simplex LBD Series Load Banks are intended for use with water cooled engine generator sets which are equipped with unit mounted radiators. The essential consideration for installation of an LBD Load Bank is only that it be located somewhere within the radiator air outow. Installation is simple and adaptive to site/system conditions. The load bank can be installed in numerous ways, including direct bolted attachment to the radiator, mounting within an air duct, wall mounting over the air outow opening, indoors or outdoors. Since the load bank design is adaptive...

Radiator-Cooled Load Bank • Page 3 Pow’r Rod Load Element Simplex bolt-together design LBD Load Bank (up to 400KW) utilizes the Pow’r Rod Load Element (UL Recognized Component, totally enclosed, sealed and weatherproof). Considerations of personnel safety and equipment durability dictate the use of totally enclosed load elements in a radiator airow cooled load bank. In this application the load bank will be installed in front of the engine radiator where the load elements are visible and within reach of personnel and exposed to the weather. The elements will be subject to mechanical stresses...

Radiator-Cooled Load Bank • Page 4 Powr-Web Resistive Load Element Simplex weld-together design LBD Load Bank (400KW-1200KW) utilizes “Powr-Web” load elements. The “PowrWeb” is an advanced design, air-cooled power resistor specically designed for application to Load Bank systems. The “Powr-Web” is conservatively operated at half the maximum temperature rating of the alloy and features a short-circuitsafe design based on continuous mechanical support of the element by high temperature, ceramic clad stainless steel rods. Specications • Alloy: FeCrAl • Maximum continuous temperature rating: 1920°F...

Insight Onsite Radiator-Cooled Load Bank • Page 5 Dimensions & Calculations Simplex LBD Series Radiator Airflow Cooled Load Banks are of a modular- building block design which enables Simplex to build-up a load bank, from stock modular parts, to exactly match your radiator or duct dimensions. Mounting adaptors, feet and outflow guards are also available from stock. The control section's standard location is on the left side, but it may be ordered A control section may be required on both sides in some applications. Bolt-Together Design LBD Series Dimensions & Calculations LOAD ELEMENT SECTION...

Simplex LBD Series Load Banks can be installed at any point within the radiator air outflow, either indoors or out. Mounting accessories and outlet screens, guards, and louvers are 1. Installed on engine radiator. Hot air exhaust through duct to outdoors. 2. Installed on engine radiator. Hot air exhaust directly to atmosphere. Attachment Flange Outflow Guard (louver panel shown) Power Conduit 3. Installed within radiator air exhaust duct. 4. Plug-mounted within radiator air exhaust duct. With separately mounted control unit. Load Bank Control adjacent wall 5. Wall mounting to exterior wall on...

Insight Onsite Mounting Accessories A. Load Bearing Flanges Load bearing attachment flange for either inlet or outlet side for mounting to radiator, or to sheet metal duct. Straight Flange Flat Inside Flange Load bearing attachment flange, for wall mounting, for inlet or outlet side of load bank, for indoor or outdoor installation of load bank. Exterior Wall Mounting Interior Wall Mounting Flat External Flange Adjustable mounting feet for floor mounting, or mounting to extension of engine base Outflow guards for air outlet side of load bank to guard against contact with hot surfaces and/or to...

Radiator-Cooled Load Bank • Page 8 Sample Specications Engineer’s Specication for Engine Radiator Airow Cooled Load Bank Options in the specications are italicized within parentheses. Blanks are provided in section 1.4, Ratings, for the addition of specic rating values. 1. GENERATOR LOAD BANK 1.1 General: An engine radiator airow cooled, resistive load bank is required for permanent, on site installation as a component of a standby engine generator system. The load bank shall be designed for (remote, local), (automatic, manual) control. The load bank (bolt-together design only - up to 400KW)...