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The Polaris is a highly standardized, advanced design, Load Bank Series, covering the small KW ranges, 5-150kw, at common 60 and 50 hertz low voltages. The Polaris is intended for permanent installation outdoors or indoors. The product is designed for local or remote control, with standard digital HMI which accepts a sophisticated optional automation package.
The Polaris is standardized into five frame sizes. Within a frame size, the unit can be easily programmed to a discrete KW rating based upon the standard load step resolution of the frame.
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General
Construction
| • | NEMA3R, outdoor weatherproof, pad-mountable, steel enclosure with removable access panels. |
| • | Powder coated dark gray cabinet with high temperature black air hoods. |
Load Elements
| • | Simplex Powr-Web chromium alloy, open wire, continuously supported, power resistor. |
| • | UL Recognized. |
Load Control
| • | Electromagnetic contactors. |
Element Short Circuit Protection
Cooling
| • | Forced-air, shrouded aluminum fan blade direct driven by TEFC motor. |
| • | Fan motor starter with external disconnect. |
Power Wiring
Power Connection
| • | Power distribution block. |
Control Power
| • | Internal, from load bus, with isolation transformer (120v control). PLC powered via 24vDC conditioned power supply. |
System Protection
| • | Fan failure, high exhaust temperature, high intake temperature, lockout and alarm. Alarm message display on touchpanel. |
Interior Heater
| • | Anti-condensation heaters with thermostatic control. |
Controller
| • | PLC based control with local or remote 4-inch TFT color HMI. |
| Capacity |
5KW-150KW |
| Frame Size |
50: 5-50KW, 5KW step resolution
75: 55-75KW, 5KW step resolution
100: 80-100KW, 10KW step resolution
150: 125-150KW, 25KW step resolution |
| Load Type |
Resistive |
| Power Factor |
1.0 |
| Voltages |
208V, 240V, 480V, 600V; 3-phase
240V; single-phase |
| Frequency |
50-60 Hz |
| Load Steps |
5-10-25KW resolution |
| Load Elements |
Simplex Powr-Web, UL recognized, chromium alloy, open wire, ceramic supported |
| Load Control |
Electromagnetic contactors |
| Duty Cycle |
Continuous |
| Cooling |
Forced-air, shrouded aluminum fan blade direct driven by TEFC motor. Fan motor starter with external disconnect. |
| Airflow |
Up to 25KW - 1/3 HP TEFC cooling fan motor, 4000 CFM
25-150KW - 3/4 HP TEFC cooling fan motor, 6000 CFM |
| Power Wiring |
150°C XLP |
| Power Connection |
Power distribution block |
| Control Power |
Internal, from load bus, with isolation transformer (120v control). PLC powered via 24vDC conditioned power supply. |
| System Protection |
Fan failure, high exhaust temperature, high intake temperature, lockout and alarm. Alarm message display on touchpanel. |
| Interior Heaters |
Anti-condensation heaters with thermostatic control. |
| Dimensions |
Frame Size 50-75-100: 75"W x 30"H x 39"D
Frame Size 100-150: 87"W x 30"H x 39"D
*Add 20" to height when equipped with local control |
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