Simplex Pump Control Panels
Metron Simplex Control Panels are designed for constant speed single motor control
applications.
The standard controller consists of a main disconnect switch or circuit breaker, a control
transformer, a starter including overloads sized for the horsepower of the connected motor
and a hand-off-auto selector switch. The Metron Simplex Controllers are supplied standard
in a NEMA 3R rated enclosure painted gray.
Options available for Metron Simplex Controllers include a main circuit breaker in lieu of a
disconnect switch, audible and visual alarms, pressure switches, timing features, and
protective devices. Optional enclosures include NEMA type 4, 4X and 12.
Listings
Metron Simplex Controllers are listed by Underwriters Laboratories, Inc. under UL 508
Standard for Industrial Control Equipment and meet or exceed the requirements set by the
National Electric Code. (N.E.C.).
Motor Starters
All motor starters supplied in Metron Simplex Controls are internationally rated and have
approvals from UL, CSA, Demko, Nenko, Semko, FI and ASE. The overloads are current
sensing and are designed to hold during high current demand when starting but will trip when
a sustained overload will trip when a sustained overload occurs. Tripping class of these
overloads is according to UL 508 and IEC 947-4. These overloads are designed to operate
from 0 to 400 Hz and are available to cover a wide range of full-load motor currents. The
overloads offer manual or automatic reset and are designed to protect AC circuits and motors
against overloads, phase failure, and long starting times.
Disconnect and Fuses
Metron Simplex Panels are supplied with a main fused disconnect switch or circuit breaker.
Each device has door mounted handle with provisions for a padlock. Access to the enclosure
can only be gained when the disconnect device is in the “off” position; however, the device
does incorporate a defeater mechanism for service situations.
Note: All Metron Controls are priced and supplied standard with fuses. Replacement fuses
can be supplied separately. Please refer to the Metron power fuse selection chart for sizes
and pricing.
Operators and Alarms
Each Metron Simplex Controller is supplied with a “hand-off-auto” switch. In addition, a
wide variety of audible and visual alarms as well as start-stop pushbuttons and overload
resets can be supplied as options. Please refer to the option pages for details.
Custom Controls
While Metron offers a complete line of Simplex, Duplex and Triplex controls available with
a myriad of options, we understand that for some applications custom engineered controls
may be required. We offer complete engineering and fabrication services for almost any
control product need. For application assistance, please consult the factory.
Options
Operators
Pressure Switches
An externally mounted pressure switch available in two pressure ranges.
0-300 PSI
Option………PL1
0-600 PSI
Option………PH1
Overload relay reset
A door mounted pushbutton to manually reset the overload relay.
Option………DR1
Motor Operation Timers
All motor timers are adjustable from .1 seconds to 10 hours and are available for the
following features:
Motor Start Delay Timer
Timer begins on demand signal.
Option………MS1
Motor Stop Delay Timer
Timer begins when demand signal is satisfied.
Option………MT1
Minimum Run Timer
Begins timing on motor run.
Option………RT1
Elapsed Time Meter
A motor running time meter which records to 99,999 hours.
Option………ET1
Indicators
Power on Light
A pilot light mounted on the enclosure to indicate “power on”.
Option………PD
Motor Running Pilot Light
A pilot light mounted on the enclosure to indicate “motor running”.
Option………MR1
Motor Overload Pilot Light
A pilot light mounted on the enclosure to indicate “motor overload”.
Option………MD1
Protective Devices
Voltage Surge Arrestors
A surge arrestor in compliance with ANSI/IEEE C62.11.1987.
Option………SS
Anti Condensation Space Heaters
120 volt space heater supplied with thermostat.
Option………HT
120 volt space heater supplied with humidistat.
Option………HH
Alarms
Visible Low Suction Pressure Alarm
Door mounted pilot light to indicate low suction pressure. The pressure switch must be
ordered separately.
Auto Reset - no motor shutdown.
Option………CL1
Auto Reset - motor shutdown.
Option………CL2
Audible and Visible Low Suction Pressure Alarm
Door mounted pilot light and audible alarm to indicate low suction pressure. The pressure
switch must be ordered separately.
Auto Reset - no motor shutdown.
Option………AL1
Auto Reset - motor shutdown.
Option………AL2
Visible High Suction Pressure Alarm
Door mounted pilot light to indicate high suction pressure. The pressure switch must be
ordered separately.
Auto Reset - no motor shutdown.
Option………CH1
Auto Reset - motor shutdown.
Option………CH2
Audible and Visible High Suction Pressure Alarm
Door mounted pilot light and audible alarm to indicate high suction pressure. The pressure
switch must be ordered separately.
Auto Reset - no motor shutdown.
Option………AH1
Auto Reset - motor shutdown.
Option………AH2
Visible Low System Pressure Alarm
Door mounted pilot light to indicate low system pressure. The pressure switch must be
ordered separately.
Auto Reset - no motor shutdown.
Option………CS1
Auto Reset - motor shutdown.
Option………CS2
Audible and Visible Low System Pressure Alarm
Door mounted pilot light and audible alarm to indicate low system pressure. The pressure
switch must be ordered separately.
Auto Reset - no motor shutdown.
Option………AS1
Auto Reset - motor shutdown.
Option………AS2
Visible High System Pressure Alarm
Door mounted pilot light to indicate high system pressure. The pressure switch must be
ordered separately.
Auto Reset - no motor shutdown.
Option………CU1
Auto Reset - motor shutdown.
Option………CU2
Audible and Visible High System Pressure Alarm
Door mounted pilot light and audible alarm to indicate high system pressure. The pressure
switch must be ordered separately.
Auto Reset - no motor shutdown.
Option………AU1
Auto Reset - motor shutdown.
Option………AU2
Visable Alarm
A door mounted pilot light.
Activating contacts by others.
Option……….VA
Normally Open Normally Closed Dry Contacts for Remote Operation
One set of N.O.-N.C. dry contacts for each remote alarm. Please specify the alarm function.
Option………NC
Silenceable Audible and Visual Alarm
Door mounted pilot light and audible alarm with silence pushbutton. Please specify alarm
function.
Auto Reset - no motor shutdown.
Option………BA1
Auto Reset - motor shutdown.
Option………BA2
Timer for Delay Alarm Activation
Timer with setting from .1 seconds to 10 hours. Please specify alarm.
Option……….DA
Manual Alarm Reset
Door mounted pushbutton for alarm reset. Please specify the alarm.
Option………AR
Modifications
Enclosures
Metron Control Products are supplied standard in NEMA 3R rated enclosures which are
intended for outdoor use and provide a degree of protection against falling rain, sleet, and
external ice formation. The following additional enclosures are available as options.
NEMA 4
Option………EN1
NEMA 4X
Option………EN2
NEMA 12
Option………EN3
Additional enclosure options include:
• Mounting feet
• Stainless steel enclosures
• Additional paint offerings
50 Hertz Operation
Metron Control Panels are supplied standard for 60 Hertz operation. Controls designed for 50
Hertz operation can be supplied at no additional charge.
Circuit breakers
Metron Simplex Control Panels can be supplied with a main circuit breaker in lieu of the
disconnect switch. To order controls with a circuit breaker, please substitute the last letter
“D” with the letter “C” in the product designation. Please note that some horsepowers and
voltages are supplied standard with a main circuit breaker due to the higher amperage ratings
required for these models. For pricing of controls with a circuit breaker, please refer to the
circuit breaker price sheet.
Simplex Control Panel Base Part Numbering Chart
Horsepower
Voltage
208V
230V
380V
460V
0.25
MSD-.25-208
MSD-.25-230
MSD-.25-380
MSD-.25-460
0.33
MSD-.33-208
MSD-.33-230
MSD-.33-380
MSD-.33-460
0.50
MSD-.50-208
MSD-.50-230
MSD-.50-380
MSD-.50-460
0.75
MSD-.75-208
MSD-.75-230
MSD-.75-380
MSD-.75-460
1.0
MSD-1.0-208
MSD-1.0-230
MSD-1.0-380
MSD-1.0-460
1.5
MSD-1.5-208
MSD-1.5-230
MSD-1.5-380
MSD-1.5-460
2.0
MSD-2.0-208
MSD-2.0-230
MSD-2.0-380
MSD-2.0-460
3.0
MSD-3.0-208
MSD-3.0-230
MSD-3.0-380
MSD-3.0-460
4.0
MSD-4.0-208
MSD-4.0-230
MSD-4.0-380
MSD-4.0-460
5.0
MSD-5.0-208
MSD-5.0-230
MSD-5.0-380
MSD-5.0-460
7.5
MSD-7.5-208
MSD-7.5-230
MSD-7.5-380
MSD-7.5-460
10
MSD-10-208
MSD-10-230
MSD-10-380
MSD-10-460
15
MSD-15-208
MSD-15-230
MSD-15-380
MSD-15-460
20
MSD-20-208
MSD-20-230
MSD-20-380
MSD-20-460
25
MSD-25-208
MSD-25-230
MSD-25-380
MSD-25-460
30
MSD-30-208
MSD-30-230
MSD-30-380
MSD-30-460
40
MSD-40-208
MSD-40-230
MSD-40-380
MSD-40-460
50
MSD-50-208
MSD-50-230
MSD-50-380
MSD-50-460
60
MSC-60-208
MSD-60-230
MSD-60-380
MSD-60-460
75
MSC-75-208
MSC-75-230
MSD-75-380
MSD-75-460
100
MSC-100-208 MSC-100-230 MSC-100-380 MSD-100-460
125
MSC-125-208 MSC-125-230 MSC-125-380 MSD-125-460
150
MSC-150-208 MSC-150-230 MSC-150-380 MSC-150-460
200
MSC-200-208 MSC-200-230 MSC-200-380 MSC-200-460
*For voltages not shown, please consult the factory.
Supplied standard with main circuit breaker in lieu of a main disconnect switch
575V
MSD-.25-575
MSD-.33-575
MSD-.50-575
MSD-.75-575
MSD-1.0-575
MSD-1.5-575
MSD-2.0-575
MSD-3.0-575
MSD-4.0-575
MSD-5.0-575
MSD-7.5-575
MSD-10-575
MSD-15-575
MSD-20-575
MSD-25-575
MSD-30-575
MSD-40-575
MSD-50-575
MSD-60-575
MSD-75-575
MSD-100-575
MSD-125-575
MSD-150-575
MSC-200-575
Ordering Information
To order Metron Simplex Control Panels, choose the correct base part number from the
above part numbering chart for the desired horsepower and voltage. For additional options,
add the appropriate option code suffix.
Example:
To order a Simplex Panel with a main disconnect switch for 25 horsepower and 380 volts
with:
0-300 PSI pressure switch
Option……….PL1
Minimum run timer
Option………RT1
Power on Pilot light
Option………PD
Specify the following part number designation: MSD-25-380, PL1, RT1, PD
Example:
To order a Simplex Panel with a main circuit breaker for 25 horsepower and 380 volts with:
0-300 PSI pressure switch
Option……….PL1
Minimum run timer
Option………RT1
Power on Pilot light
Option………PD
Specify the following part number designation: MSC-25-380, PL1, RT1, PD