Water
Cooled
LBW-Series
5KW-600KW
LBW-Series
Load Bank
The LBW-Series Load Banks
are completely self-contained, freestanding units which include
all resistive load elements, load control devices, load element
branch circuit fuse protection, main load bus and terminals,
water cooled system, control power supply, unit controller and
malfunction detection system.
Simplex LBW-Series Load Banks are suitable for use with
fresh or saline cooling water or cooling tower water. Freshwater
sources include utility water or lake/river/stream water. Saline/sea
water cooled units are supplied with Monel and bronze construction.
Simplex LBW-Series Load Banks are available for 180PSI
test pressure for utility water systems and most pump fed systems
or designed for high pressure systems typical of cooling tower
supplies. The corrosive impact of cooling tower water additives
must be considered. High capacity pump sets are available as
an option.
Simplex LBW-Series Load Banks provide the advantage of
compact size and low temperature operation making them ideal
for indoor installation well within the interior of a building
or ship. Unlike an air cooled Load Bank which must exhaust a
very high volume of hot air to the outdoors and, as a result,
is limited when installed indoors, a water cooled Load Bank only
needs two pipes (water in and water out) and produces no significant
heat radiation to the interior space. In many cases, this will
allow installation of the Load Bank nearer to the power source
or in otherwise unused space. Anti-condensation systems which
monitor and control the humidity level in the load cell compartment
are also available.
Options
Automatic load leveling and
load regulation to maintain total generator load within a preset
band width. Solid state controller senses generator load and
automatically adds/subtracts Load Bank steps in order to maintain
total generator load at a desired level. Controller senses either
amperes or kilowatts. Adjustable level and delay.
Anti-condensation system
Monel and bronze construction for saltwater cooling
Very high pressure operation, greater than 180PSI
Instrumentation, 3.5" panel meters;
4.5" switchboard meters; digital meters
Main input disconnect/circuit breaker
Principle Systems
and Components
Load Elements
Water immersion type, NiCr conductor, incolloy clad, screw plug
mounting (individually replaceable)
Monel or stainless steel cladding available
Load Control
Branch circuit magnetic contactors, each load step circuit
Short Circuit Protection
Branch circuit fuses, each load step circuit. Fuses are 200KAIC,
current limiting type
Power Wiring
150°C silicone insulated, color coded
Control Wiring
105°C insulated, numbered and/or color coded
Power Connection
Power distribution block with line side pressure terminals
Malfunction Detection System
Sensors, lockout circuits and alarms for: high water temperature,
low water level/loss of flow, high pressure
Water Flow Control
Inlet supply solenoid valve; manual isolation ball valves on
inlet and outlet
Drain ball valve
Coolant
City water, closed-loop heat exchanger, natural water (river,
lake, etc.), brine, or sea water
Minimum Coolant Flow
10GPM per load cell (100KW)
Water Connection
1”, 2” or 4”, as required by flow
Control Panel
Local or remote, includes:
1. Control power on-off pushbuttons
2. Load step switches, and total load master control switch
3. Neon indicators: Normal Operation, Control Power Available,
and alarm indicators - High Temp, Loss of Low/Low Level, Over
Pressure
Capacity 5KW-600KW; Resistive, 1.0 p.f. Voltage to 600V AC,1-phase or 3-phase to 350V DC 60 Hertz: 120V, 240V; 1-phase 208V, 220V, 240V, 440V, 450V, 460V, 480V, 575V, 600V; 3-phase 50 Hertz: 100V, 110V, 220V; 1-phase 190V, 200V, 208V, 220V, 380V, 400V, 420V; 3-phase 400 Hertz: 120V, 200V, 208V, 416V; 3-phase DC: 48V, 60V, 90V, 125V, 180V, 250V, 350V Frequency 50, 60, 400 Hertz; DC Load Steps 25KW, 50KW, 100KW standard. 1-5-10KW resolution available. Cooling Requirements The standard design is for use with an external pressure source. Pump sets are available either for installation within the Load Bank for a suction feed or for freestanding remote installation. Supply water to limit outlet temperature to less than 180°F. KW = GPM x Temp. Rise (F) x .16 GPM = KW / (Temp. Rise x .16) Temp. Rise (F) = KW / (GPM x .16) Standard unit accepts water to 180PSI. Optional designs accept higher pressures. Pressure drop across Load Bank approximately 5PSI. Standard units accept fresh water. Optional designs accept sea water. Consult Simplex for acceptability of water additives. Particulates must be less than 150 microns or a filter is required. Control Power Internal or external source All control circuits operate at 120V, 1-phase, 60 Hz Isolation transformer supplied when line voltage greater than 120V, 120/240V or 120/208V Local Ambient Temperature 120°F max. Load Cell Test Pressure 180PSI standard Higher pressures available Duty Cycle Continuous Dimensions and Key Features Diagram |
