K841B

750 and 1125 kVAR Inductive Load Banks

The K841B reactive load bank is designed to be used in combination with resistive load banks to provide loading of AC power sources at less than unity power factor. Made available with a wide range of load capacities the K841B can accommodate a variety of testing requirements.

The load bank contains single-phase and 3-phase iron core reactors and a blower motor housed in a rigid structure of formed heavy gauge steel. Designed for indoor or outdoor installation, the K841B is equipped with inlet screens between the structural members in the bottom of the unit. Channels provided in the base structure facilitate handling by forklift truck from all four directions. 

The K841B has load steps ranging from 37.5 to 375 kVAR at 480 volts, 60 Hz. The unit may be operated at 380-415 volts, 50 Hz, with load steps derated at approximately 86 percent of the rated kVAR load steps. The control circuit and cooling fan power is 120 volts, single-phase, 60 Hz.

Product Specifications

CONSTRUCTION: Heavy gauge steel enclosure provides a rigid structure with removable aluminized steel panels for interior access. The base of the unit features forklift channels for simplifi ed handling.

COOLING: The K841B contains a cooling fan to aid the convection cooled reactors. The cooling fan requires a power source of 120 volts, single-phase, 60 Hz.

CONTROLS/METERING: The K841B control circuit requires 120 volts, single-phase, 60 Hz power. The standard 19” rack mount control panel includes a POWER ON-OFF switch, BLOWER ON-OFF switch, a POWER ON light, a MASTER LOAD ON-OFF switch, a VOLTAGE SELECTOR switch (if applicable), and individual load step toggle switches. 

REACTORS: Single and 3-phase iron core reactors are designed for 130°C rise in a 50°C environment with a maximum of 5 percent waveform distortion and 0.05 power factor. 

PROTECTION: Each load step is fused using UL class T fuses with 200,000 AIC rating. Each 3-phase reactor contains a normally closed thermal switch in each coil. The load bank enclosure is equipped with thermal switches. All thermal switches are interconnected with the load application control circuit.