Description
Simplex Merlin Load Banks are the
new standard for advanced design in
Portable Load Banks spanning the
capacity range of 100–400KW. The
Merlin is a dual voltage (240/480v), fi ne
load step resolution, fully instrumented
Portable Load Bank intended for
small-medium capacity shop or fi eld
use by engine generator dealers and
service shops for maintenance, testing
and performance proving of engine
generator sets, UPS and other power
systems in the 50–400KW range. The
Merlin is available in discrete model
sizes of 100KW, 150KW, 200KW,
250KW, 300KW, 350KW and 400KW.
The Merlin control panel includes
test instrumentation, load application
switches, operation indicator lights and
fan/control power switch. The Load
Bank includes rugged “Powr-Web”
load elements, load control contactors,
branch circuit fuse protection of the
load elements, high temperature power
wiring, cooling fan with circuit breaker,
control power fuses. The Load Bank
is protected against fan failure, high
intake air temperature, high exhaust air
temperature, and overvoltage. The unit
includes a 12’ connection cable set.
MERLIN
100KW - 400KW Load Bank
Merlin Load Banks are built on a formed
and welded steel chassis that is both
rugged and lightweight. For fl exible
portability, the Merlin includes casters,
lifting eyes and forklift channels. Airfl ow
through the unit is horizontal with
cooling provided by a cast aluminum
airfoil type shrouded propeller fan.
Features
• Exceptionally rugged, all welded,
formed steel chassis
• Hinge-open control section door
• Lifting eyes, forklift channels and
casters
• Moving handle
• “PowrWeb” Load Elements
• Branch circuit fuse protection
Insight
Onsite
®
MERLIN
100KW - 400KW Load Bank • Page 2
Powr-Web Resistive Load
Element
Description
Simplex Load Banks utilize the “PowrWeb” Load Element (a UL Recognized
Component). The “Powr-Web” is an
advanced design, air-cooled power
resistor specifi cally designed for
application to load bank systems. The
“Powr-Web” is conservatively operated
at half the maximum temperature rating
of the alloy and features a short-circuitsafe design based on continuous
mechanical support of the resistor by
high temperature, ceramic clad stainless
steel rods.
Construction
®
• Precision calibrated to specifi c ohmic
value
• All load elements are continuously
supported by vibration resistant,
ceramic clad, stainless steel throughrods.
Specifi cations
• Alloy: FeCrAl
• Maximum continuous temperature
rating: 1920°F
• Maximum operating temperature as
applied in Load Bank: 1080° F
• Cool down time from operating to
ambient temperature is 10 seconds.
Branch Circuit Fuse
Protection
The load of a resistive load bank
consists of a dense array of open,
uninsulated power resistors mounted
within a cooling air stream. Since
the elements are electrically live, it is
possible for a foreign object to penetrate
the element array and create a short
circuit of adjacent elements or a short to
ground. Since the elements are densely
packed, it is possible for a short circuit,
once started, to rapidly propagate
through the entire element array. As
a load bank represents a relatively
large amount of power concentrated
within a relatively small volume, a selfpropagating, cascading short circuit
would have catastrophic results.
Simplex virtually eliminates the
dangers of short circuit through the
use of branch circuit fuse protection of
the load elements. Per NEC 110-10,
protective devices shall clear a fault
without “extensive damage” to the circuit
components. A Simplex Load Bank is
divided into branch circuits of not more
than 50 KW each.
Simplex, Inc.
5300 Rising Moon Road
Springfi eld, IL 62711-6228
217-483-1600
Fax 217-483-1616
www.simplexdirect.com
© 2012 Simplex, Inc. All Rights Reserved.
Printed in the USA • 1103-03.01
Design subject to change without notice.
Insight
Onsite
MERLIN
100KW - 400KW Load Bank • Page 3
KW , 1.0 P.F. COOLING FAN LOAD STEPS
240/480V,
Model
Merlin 100 100 75 63 67 0.75 120V/240V, 1-ph. 6000 5, 10, 10, 25, 50
Merlin 150 150 112 94 100 .75 120V/240V, 1-ph. 6000 5, 10, 10, 25, 50, 50
Merlin 200 200 150 125 134 1.5 120V/240V, 1-ph. 6700 5, 10, 10, 25, 50, 100
Merlin 250 250 188 157 167 1.5 120V/240V, 1-ph. 6700 5, 10, 10, 25, 50, 50, 100
Merlin 300 300 225 188 200 1.5 120V/240V, 1-ph. 6700 5, 10, 10, 25, 50, 100, 100
Merlin 350 350 262 219 233 3.0 240/480V, 3-ph. 8000 5, 10, 10, 25, 50, 50, 100, 100
Merlin 400 400 300 250 267 3.0 240/480V, 3-ph. 8000 5, 10, 10, 25, 50, 100, 100, 100
3-phase
Fan/Control Power
User selectable, internal/external
Internal Power
Merlin 100, Merlin 150:
120V, 1-ph, 2-wire, 60Hz
240V, 1-ph, 3-wire, 60Hz
208-240V, 3-ph, 4-wire, 60Hz
Optional: 416-480V, 3-ph, 3-wire, 60Hz
Optional: 50Hz Voltages
Merlin 200 through Merlin 300:
120V, 1-ph, 2-wire, 60Hz
240V, 1-ph, 3-wire, 60Hz
208-240V, 3-ph, 4-wire, 60Hz
416-480V, 3-ph, 3-wire, 60Hz
Optional: 50Hz Voltages
Merlin 350 through Merlin 400:
190-205V, 3-ph, 3-wire, 50Hz
208V-240V, 3-ph, 3-wire, 60Hz
380-416V, 3-ph, 3-wire, 50Hz
416-480V, 3-ph, 3-wire, 60Hz
208/416V,
3-phase
190/380V,
3-phase
240V,
1-phase HP Voltage CFM KW @ 240/480V, 3-phase
External Power
Merlin 100, Merlin 150:
115V, 1-ph, 60Hz, 15A
Merlin 200 through 300:
115V, 1-ph, 60Hz, 20A
Merlin 350, Merlin 400:
230/460V, 3-ph, 50/60Hz, 20A
Voltage
High/Low Mode, operator selectable
High: 250-480VAC, 3-ph.
Low: to 240VAC, 3-ph.
Optional: 1-ph.
Frequency
60Hz; Optional: 50, 400Hz
Duty Cycle
Continuous
Temperature Rating
125° F max intake air temp
Nominal 110° F rise
Power Connection
Merlin 100 through Merlin 300:
4-wire plus ground
Merlin 350, Merlin 400:
3-wire plus ground
© 2012 Simplex, Inc. All Rights Reserved.
Printed in the USA • 1103-03.01
Design subject to change without notice.
217-483-1600
Fax 217-483-1616
www.simplexdirect.com
Simplex, Inc.
5300 Rising Moon Road
Springfi eld, IL 62711-6228
MERLIN
100KW - 400KW Load Bank • Page 4
®
Dimensions and Key Features
1
H
Model W D H
Merlin 100KW, 150KW 31” 47” 43”
Merlin 200KW, 250KW, 300KW 31” 56” 50”
Merlin 350KW, 400KW 31” 69” 50”
WD
53
9
6
EXHAUST
AIR
4
8
10
11
INTAKE
AIR
2
7
RIGHT VIEW REAR VIEW LEFT VIEW
1. 12' Cable Set
2. Forklift Channels
3. Lockable Latch
4. Screened Intake and Exhaust
5. Hinged Access Door to Control
Panel
6. Removeable Panel to Access
Elements
7. Casters
8. External Control Power Cable
9. Hinged Access Door to Fuses and
Contactors
10. Hand Grip for Moving and Cable
Storage
11. Removeable Panel to Access Fan
Merlin 300 with optional Cam-Lok connectors
Simplex, Inc.
5300 Rising Moon Road
Springfi eld, IL 62711-6228
217-483-1600
Fax 217-483-1616
www.simplexdirect.com
© 2012 Simplex, Inc. All Rights Reserved.
Printed in the USA • 1103-03.01
Design subject to change without notice.
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