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The Mars-HV is a self-contained Load Bank to 15KV utilizing the Simplex Mars Load Module with on-board dry-type power transformer. It is a freestanding, skidded unit consisting of three principle sections:
| 1. | High voltage section consisting of main input power terminals, high voltage: 480V 3-phase power transformer, low voltage output terminals, and outputs to load cell. |
| 2. | 480V, low voltage resistive load section consisting of one 700KW-1250KW forced air-cooled load cell. |
| 3. | Control Section. |
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General
Load Elements
| • | Elements mounted in easily accessible, slide out trays. |
| • | Simplex Powr-Web chromium alloy, open wire, continuously supported, power resistor. |
| • | UL Recognized. |
System Controls
| • | Standard: Simplex D-Series Digital Controller with local or remote touchscreen. |
Cooling
| • | Integral forced air cooling system. |
| • | 3-phase, direct-drive motor. |
| • | Water shedding exhaust hood. |
| • | Forced air, vertical airflow -- cold air intake at bottom, hot air exhaust at top. |
System Protections
| • | Sensors, alarms (alarm message on remote operator interface terminal), lock-outs as appropriate, for the following: fan failure, high exhaust temperature, high intake temperature. |
| • | Load Circuit Protection: branch circuit fuses. One set of fuses each 50KW branch. Fuses are current limiting type, 200,000 AIC, 600V, enabling safe use on large generating or UPS system. |
Load Control
| • | Branch circuit contactors, each 50KW step. |
| • | Contactors with enclosed silver surfaced contacts, 120V coils; electrically operated and electrically held. |
Power
| • | Control Wiring: 105°C, color coded. |
| • | Power Wiring: 150°C. |
| • | Cables connect to full rated copper bus bar with an oversize terminal junction box. |
Enclosure
| • | Type 3R weatherproof power section, including load elements and cooling fan. |
| • | Type 3R weatherproof control section, thermally and electrically isolated from resistive load power section. |
| • | Double wall construction for cool exterior. |
| • | Exhaust hood mounts atop power section. Hood may be deleted and a duct flangee provided for indoor application where air is exhausted through a duct to the outdoors. |
| • | Service access from three sides via hinged doors with lockable latches. |
| • | Enclosure abrasively blasted or chemically etched, primed and finished. |
| • | Anti-condensation heaters at 120V, 1ø, 240V 1ø, or any common 3ø voltage. |
Transformer
| • | Dry trype transformer |
| • | 700-1200KVA, continuous duty |
| • | High voltage delta, 3-wire primary |
| • | 480V wy, 4-wire secondary with grounded neutral |
| • | 220°C insultation / 150°C rise |
| Capacity |
700KW-1250KW |
| Load Type |
Resistive |
| Power Factor |
1.0 |
| Voltages |
to 15KV AC, 3-phase
(typical: 2400V, 3300V, 4160V, 13,200V, 13,800V)
Load circuits operate at 480V via main power transformer |
| Frequency |
50, 60 Hz |
| Load Steps |
50KW resolution |
| Duty Cycle |
Continuous |
| Temperature |
120°F maximum abmient temperature
Exhaust rise: 150°F.
Note: As airflow is not laminary, 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. |
| Airflow |
26,000 CFM, 10 HP |
| Fault Rating |
Fuses are rated 200KAIC. The load bank has a 5KAIC short circuit current rating. |
| Load Wire Insulation Rating |
600V, 150°C |
| Control Wire Insulation Rating |
600V, 105°C |
| Fan/Control Power |
Internal via high voltage: 480V, 3-phase transformer for fan power.
480:120 transformer for control circuits. |
| Dimensions |
Varies by capacities and options selected. |
| Weight |
Varies by capacities and options selected. |
System Controls
Instrumentation
System Protections
| • | Main load disconnect breaker or fused disconnect switch. |
Fan/Control Power
| • | External source at customer specified 3-phase voltage. |
Additional Options
| • | Primary and / or secondary fused disconnect switch. |
| • | Lightning arrestors. |
| • | Industrial de-humidifiers. |
Highway Trailer
| • | Trailer construction conforms to applicable Federal and DOT standards. Includes: safety chains, electric lights, electric brakes, leaf springs, pintle eye coupler, and landing jack. |
Note: We are experts at building products that meet our customer's exact requirements. Contact Simplex if your job specifications require additional options or considerations.
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