Transmittal of generator prepurchase specifications, March 1998

NYC 9/11 Public Portal Document

PPS-Generators

1. Load elements are to be individually serviceable and replaceable from the front of the unit in thg field without major disassembly of the load bank. An acceptable design to satisfy this requirement is the installation of the load elements in slide- out, removable trays in such a way that any element is easily accessed without disturbing any other elements.

2. All materials used in the mounting and installation of the load elements shall be suitable for the temperature encountered, both in normal operation and under fault conditions.

a. Materials in direct contact with the element wire shall be ceramic. These ceramics shall be installed upon and reinforced and supported by stainless steel structures.

b. Other materials which structurally support the load elements and/or form from the hot air duct within which the elements are mounted shall be steel, stainless steel or aluminum.

c. Plastics and glass reinforced plastic materials and flammable materials are not acceptable materials of construction for installation, support and mounting of load elements or in the construction of the load bank hot air duct.

3. Load elements shall be Simplex "Power Web" Brand or other approved.

F. The resistive load shall be fused in branch circuits of not more than 50KW each.

1. Load circuit fuses shall be 200,000 A.l.C. current limiting type, extremely fast acting, 600V rated.

G. Load control shall incorporate one magnetic contactor per each fused branch circuit.

H. Load power wiring shall incorporate 150°C insulated.

1. Main terminals shall incorporate copper, 1000A per square inch.

J. Each load bank shall include a unit controller which provides the following functions:

1. Power supply for load bank control circuits.

OEM PPS-21 Generators 7 WTC March 20, 1998

NYC-WTC_000166896