Mercury Stationary Load Banks
Mercury
50-150KW
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 Mercury Load Bank is single or dual voltage suitable for all common 60 and 50 hertz voltages up to 600V.
Features
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
Plated bus bar
Modular enclosure design with separate and isolated control and
power sections
Slide-out, tray mounted load elements
UL Listed
Capacity 50-150KW; 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. 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, vertical airflow, top exhaust. 3-phase, TEFC motor driving cast aluminum fan blade. Circuit breaker combination motor starter. Airflow 2,000 CFM Duty Cycle Continuous Dimensions 43"W x 52.887"D x 55.88"H Sales Bulletin 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 hinged doors with stainless steel hinges and lockable latches. 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 vertical with cold air intake at the bottom and hot air exhaust out the top 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 hood, 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
Plated bus bar within an oversize terminal junction box.
