Polaris Stationary Load Banks
Polaris
5-150KW
Low to medium capacity load testing of generators, periodic reliability exercise of standby generators, regenerative power absorption of inertial motors with reverse power protection of generators and other Load Bank applications are achieved with these Load Banks.
The Polaris Load Bank is suitable for all common 60 and 50 hertz voltages up to 600V.
Features
Unit mounted or remote wall-mount control panel with master load
toggle switch and load step toggle switches
Self-contained load and control
system
Utilizes the proven Simplex “Powr-Web”
load element
Branch circuit
fuse protection of load elements
Comprehensive overload, short circuit and malfunction protection
Color coded and numbered wiring; power wiring 150°C
Power terminal block with standard size pressure terminals for
common building wire
Modular enclosure design with separate and isolated control and
power sections
Removable, fixed load elements
Capacity 5-150KW; Resistive, 1.0 p.f. Voltage All common 3-phase 60 and 50 Hz voltages: 60 Hertz: 208V, 220V, 240V, 416V, 440V, 450V, 460V, 480V, 575V, 600V 50 Hertz: 190V, 200V, 208V, 380V, 400V, 416V Frequency 50, 60 Hertz Load Steps 50 KW resolution standard 1-5-10-25KW resolution available Fan/Control Internal, from load bus. Control circuits at 120V via transformer for 240/480V, 3-phase applications or L-N connection for 208V, 3-phase. The cooling fan operates at 3-phase line voltage. Load control circuits and fan motor control operate at 120V. Control circuits are fused. Control circuit fuses are 100,000 A.I.C., 600V rated. External, 480/240V, supply for humidity controller, when ordered. Cooling Forced air, horizontal. 3-phase, TEFC motor driving cast aluminum fan blade. Circuit breaker combination motor starter. Airflow 2,500 CFM up to 75KW 3,500 CFM over 75KW Duty Cycle Continuous Dimensions 33.75"W x 26.5"D x 30"H up to 75KW 39.75"W x 36.5"D x 30"H over 75KW Dimensions and Key Features Diagram Stationary Load Banks: Applications and General Specifications, Features and Options, and Engineer’s Specifications |
Simplex “Powr-Web” open wire, helically wound, chromium alloy, thermally derated to 60%. 5% tolerance, 2% balance, .995 p.f.
UL Recognized.
Load Control
Branch circuit contactors, each 50 KW step. Contactors have enclosed silver surfaced contacts, 120V coils; electrically operated and electrically held.
Element Circuit Protection
Branch circuit fuses, each 50KW branch circuit, 70A, 200kAIC, current limiting type.
System Protection
Fan failure, high exhaust temperature, high intake temperature; lockout and alarm.
All panels for access to serviceable components are bolted on. All exterior fasteners are stainless steel.
The Load Bank enclosure is of double wall construction for cool exterior and thermal isolation of the load elements. Cooling airflow through the enclosure is horizontal with cold air intake and hot air exhaust on the sides of the Load Bank. Intake and exhaust openings are screened. All parts of the enclosure are abrasive blasted or chemically etched, primed and finished with a color as specified. The exhaust louver, which is exposed to high air temperatures, is unpainted galvanized steel.
150°C insulated; color coded.
Control Wiring
105°C, color coded and/or numbered.
Temperature
Maximum ambient temperature: 120°F
Exhaust rise: 150°F
(Note: As airflow is not laminar, exhaust air temperatures are not equal at all points at the plane of air exhaust. Some parcels of air may reach approximately 575°F before mixing.)
Power Connection
Power terminal block with standard size pressure terminals for common building wire.
