Description
Avtron Resistive Load Bank - Part Number LPV600 994210
2-1
SECTION II
DESCRIPTION
The Model LPV600 Load Bank is a portable, primarily indoor, self-contained unit for electrically
loading and testing generators. The Load Bank is rated at 600 kW at 600 VDC and 300 kW at 300
VDC. The available load steps are 240 kW, 120 kW, 120 kW, 60 kW, 20 kW, 20 kW, l0 kW, 5 kW,
2 kW, 2 kW, and 1 kW at 600 VDC. Load steps at 300 VDC are 120 kW, 60 kW, 60 kW, 30 kW, 10
kW, 10kW, 5 kW, 2.5 kW, 1 kW, 1 kW, and 0.5 kW. All load steps are selected by toggle switches.
Provisions are included for special operator interface by others. Refer to Schematic Diagram
995228.
The fan motor is a 5 HP, 3-phase motor which operates from 240/480 volts, 3-phase, 60 Hz power.
The fan motor obtains power from a remote source (external power source).
Fan failure protection is provided in two ways. A differential pneumatic pressure air switch (S51)
senses the airflow through the Load Bank. An additional slave relay (K30) is activated only if
power is applied to the fan motor terminals. This slave relay will disconnect control power to all
load contactors should the fan power be disconnected, the motor overload trip out, or the air
inlet/exhaust screens become blocked.
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C A U T I O N
This Load Bank should never be used without the fan motor
operating. Inadequate cooling airflow will result in resistor elements
overheating and a definite fire hazard.
Load step contactors are polarity sensitive. Observe proper polarity
when connecting load wiring to the Load Bank. Reverse polarity
connections to the Load Bank will cause contactor damage.
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GENERAL CONSTRUCTION (Refer to Outline Drawing SB3396.)
The Control Panel is mounted on the front face of the Load Bank. It is also sized for mounting into a
19-inch rack enclosure. The control panel contains all the switches required to operate the Load
Bank. Digital Volt and Ammeters are provided on the control panel. The Load Bank is constructed
of aluminized steel, forming a rigid structure. Mounted within this structure are the load element
resistor assemblies, the cooling fan and motor, the load step contactors, motor starter, motor
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