ULB RESISTIVE/REACTIVE LOAD BANK
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ULB RESISTIVE/REACTIVE LOAD BANK The ULB RL Series is a state-of-the-art, high-capacity Resistive/Reactive load bank system intended for testing and routine maintenance of stand-by generators, UPS, or other AC power sources. Designed for outdoor installation, the load bank features vertical hot-air discharge. Both the resistive and reactive sections are housed in the same cabinet (in separate sections), eliminating the need for installing completely separate resistive and reactive load banks. The load bank is digitally controlled via an on-board PLC with color touchscreen display and includes standard digital monitoring with test data capture to a USB drive. Resistive/Reactive load banks are specified when 0.80 power factor testing is required. Typical ratings are: 1500 KVA at 0.80 pf, 1200 KW RESISTIVE, 900 KVAR REACTIVE 1250 KVA at 0.80 pf, 1000 KW RESISTIVE, 750 KVAR REACTIVE 625 KVA at 0.80 pf, 500 KW RESISTIVE, 375 KVAR REACTIVE The load bank enclosure is rated NEMA-3R and is suitable for permanent outdoor installation. The cabinet is constructed of heavy gauge steel with a durable polyester powder coat finish. The cabinet has hinged access doors with lockable latches. Cooling air is drawn in from the screened intake sides and the hot air exhaust is directed vertically upward through a stainless steel screen on top. Forklift channels are included in the base for easy positioning and placement. The load bank incoming power connections are made inside the main cabinet directly to copper bus bars. ULB’s proprietary resistor load elements provide the necessary power loading for each individual resistive load step. The resistors are constructed from precision nickel-chromium resistance alloy and are fully supported within the air stream by stainless steel rods which are insulated with high-temperature refractory ceramics. The load bank reactor elements are ULB non-saturating, VPI type, iron core reactors, designed for 150°C rise, 220°C insulation with a maximum of 2% waveform distortion. Heavy-duty, PLC controlled magnetic contactors provide load application of both the resistive and reactive load steps.

LEFT SIDE VIEW FRONT VIEW RIGHT SIDE VIEW REAR VIEW The load bank resistor elements are forced-air cooled with a heavy-duty, three-phase, TEFC electric blower motor with a high-performance direct-drive fan blade. The blower motor can be powered from the main input load bus (test source) or optionally from an external three-phase supply source. Motor starter circuit is fuse protected and includes an overload relay. The reactors have supplemental cooling by internal 120 VAC blowers powered from the main control circuit. STANDARD DIGITAL LOAD CONTROLS The load bank is digitally controlled via...