Stationary
Neptune
150KW
200KW
300KW
350KW
400KW
500KW
Neptune Load Bank
The Neptune Load Bank
is a completely self-contained, freestanding unit which includes
all resistive load elements, load control devices, load element
branch circuit fuse protection, main load bus and terminals,
cooling system, control power supply, unit controller and malfunction
detection system and NEMA type enclosure.
High 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 the Simplex
Neptune Load Bank. The unit capacity range is 150-600KW,
resistive, unity power factor.
The Neptune is a single or dual voltage Load Bank suitable
for all common 60 and 50 hertz voltages up to 600V.
Cooling System: Using a very high volume forced air cooling
system air temperature rise (150-200°F) is limited to that
seen in smaller Load Banks.
Load Control: Master load toggle switch and load step
toggle switches
Benefits
Self-contained load and control system
UL Listed
Modular enclosure design with separate and isolated control and
power sections
NEMA-3R, oversize control section with generous cable connection
space
Vertical airflow, exhausts hot air above level of personnel and
away from buildings, pavement etc.
Slide-out, tray mounted load elements
Highly standardized, based upon extensive product line spanning
from 5KW to 3MW
Features
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
Capacity 150KW, 200KW, 300KW, 350KW, 400KW, 500KW; 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 250-350KW: 9,000 CFM, 3 HP; 400-650KW: 12,500 CFM, 5 HP Duty Cycle Continuous Sales Bulletin Dimensions and Key Features Diagram Stationary Load Banks: Applications and General Specifications, Features and Options, and Engineer’s Specifications |
Principle Systems and Components
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.
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.)
Fan failure, high exhaust temperature, high intake temperature; lockout and alarm.
Enclosure
Modular enclosure consists of three parts:
1. NEMA-3R rainproof power section including load elements and cooling fan
2. NEMA-3R control section, thermally and electrically isolated from power section
3. Exhaust hood. Mounts atop power section. Vertical flow with rain separators. Hood may be deleted and a duct flange provided for indoor applications where air is exhausted through a duct to the outdoors.
All panels for access to serviceable components are hinged doors with stainless steel hinges and lockable latches. All exterior fasteners are stainless steel.
Power Wiring
150°C insulated; color coded.
Control Wiring
105°C, color coded and/or numbered.
Power Connection
Plated bus bar within an oversize terminal junction box.
