Murphy MGC2000 User Manual
MGC-02029B
Revised 06-03
Catalog Section 75
(00-02-0500)
Generator Control System
FWMurphy
Description
The compact and powerful MGC2000 generator
control system features a unique, simple-to-install
and setup design and enhanced operation.
The control method for the MGC2000 may be
specified for using either the AS3000 Autostart
automatic controller or the 518APH electrically
tripped annunciator method.
The system is available in two basic configurations:
MGC2000
features mechanical gages:
- MGC2000-A Automatic Control: with
Murphy’s AS3000 Generator Controller.
- MGC2000-M Manual Control: with
518APH annunciator control.
Both configurations include standard AC
voltmeter, AC ammeter, and frequency meter.
Available for single-phase, standard three-phase,
and three-phase, re-configurable generators.
MGC2000E
features electric gages:
- MGC2000E-A Automatic Control: with
Murphy’s AS3000 Generator Controller.
- MGC2000E-M Manual Control: with
518APH annunciator control.
Both configurations include standard AC volt-
meter, AC ammeter, and frequency meter.
Available for single-phase, standard three-phase,
and three-phase, re-configurable generators.
Features
•
Dynamic design allows for easy installation
and full operation flexibility.
•
1/4 inch quick disconnect terminations
•
Shock mount assemblies to minimize damage
•
AC voltmeter and ammeter
•
Phase selector switch
•
Frequency meter: 45-65hz
•
Optional hourmeter; DC Voltmeter;
DC ammeter
•
First-out fault shutdown and indication
(AutoStart models only) of low oil pressure,
high temperature and auxiliary inputs
•
Inputs can be from engine-mounted fault
switches or panel-mounted SWICHGAGE
®
instruments.
•
Magnetic pickup or generator AC speed
sensing (AutoStart models only). For automat-
ic crank release and overspeed fault shutdown.
Speed calibration is automatic–adjustment free.
Additional switch inputs allow optional remote
control of crank disconnect and overspeed fault.
•
Generator AC Hz meter output: 0-1 mA.
•
User-friendly: Well-thought-out routine for
faster and easier set up.
•
Interfaces with existing equipment: functions
seamlessly with many other Murphy instruments and controls (AutoStart models only).
Specifications
Pressure Gage: 100°psi (680 kPa) [7 bar]
Mechanical Gage Pressure Connection: 1/8” NPT.
Electric Gage Pressure Connection: 2-wire.
Temperature Gage: 0-250°F (121°C)
Mechanical Gage Temperature Connection: 12ft.
(3.67 m) capillary tubing and sensing bulb.
Electric Gage Temperature Connection: 2-wire.
Enclosure: 16 Ga CRS powder coated.
Optional NEMA 4X Type Enclosure:
Water and dust tight indoor/outdoor enclosure
intended to protect enclosed equipment against
splashing, seepage, falling or hose-directed
water and severe external condensation.
AC Meters: AC ammeter and an AC voltmeter
and a frequency meter are standard features.
Ranges must be specified.
Single or Three Phase: Specify.
Control Method: may be specified:
- AS3000 Autostart automatic controller or
- 518APH Annunciator control method.
NOTE: Autostart method is highly recommended.
DC Voltage:
12 or 24 volt DC voltage must be specified.
MGC2000
■
New Dynamic Design Allows for
Easy Installation and Full Operation
Flexibility
■
Features Murphy’s AS3000 Engine/
Generator Controller
■
User-Friendly, Well Thought-out
Routine for Faster/Easier Setup
AS3000 Autostart
Generator Controller
Voltmeter
Hourmeter
Pressure Gage
Temperature Gage
Frequency Meter
1 - 3 Phase
Selector Switch
16 ga CRS Enclosure,
NEMA 4 Optional
AC Ammeter
AC Voltmeter
Power supply:
•
Continuous voltage range: 8-35 VDC
•
Brown out voltage < 5 VDC for 2 secs (recovery to 8V)
•
Blackout voltage: 0V for 50mS (from 10V, recovery to 5V)
•
Overvoltage withstand: 50 VDC for 5 seconds (to SAEJ1810 load
dump immunity
•
Reverse voltage withstand: 100 VDC continuous
Current consumption (standby): 50mA
Current consumption (max): 500mA (plus output loads)
DC Inputs:
•
Pressure, coolant temperature
•
Closed to negative DC (±3V) on fault auxiliary and charger faults
•
Remote start positive open from positive DC to start
•
Remote start negative close to negative DC (±3V) to start.
AC Inputs:
•
Magnetic pickup: 3 – 60 VAC, 50Hz – 10 kHz.
•
Generator AC: 600 VAC max (L-L or L-N), 50/60 Hz.
Outputs:
•
Fuel: positive DC (FET switched), 5A max.
•
Crank, preheat: positive DC (FET switched), 2A max.
•
Common alarm, fault lockout negative DC (semiconductor), 300mA max.
•
Generator Hz. meter: 0 – 1 mADC (@ 45–65Hz).
Physical:
•
Operating temperature: -10 to +65 oC
•
Relative humidity: 95% @ 60 oC
•
Environmental protection: AS3000U front: IP65, NEMA4
Vibration: ISO 88528 pt.9, & 3 axis 3g
Standard terminal blocks inside the MGC2000 enclosure. Booted type
grommets for a tight seal are available.
MGC-02029B page 2 of 4
Standard Enclosure Dimensions (all Models)
ASM3000 Controller Specifications
WARNING: Do not bundle AC and DC wiring together. It is required
to use separate conduit runs and keep apart by at least 2 inches.
6.81 in.
(173 mm)
Front View Side View
16-80 in. (427 mm)
0
5
75
25
0
10
A-C
VOLTS
OFF
3
A-C
AMPERES
HERTZ
1
REMOTE START
OVERCRANK
DEMAND
ENGINE RUNNING LOW OIL
PRESSURE
BATTERY
HIGH ENGINE
CHARGER FAIL
TEMPERATURE
PLANT FAIL/
OVERSPEED
AUXILIARY INPUT
OFF/
MANUAL
STOP
START
O
H
QUARTZ
AUTO
START
5
2
0
PSI
0
kPa
Hinges for front-opening door option shown in shaded areas.
0
0
35
PSI
0
70
0
kPa
S
R
U
0
5
5
7
0
5
3
0
0
7
0
5
5
7
5
2
0
0
1
0
0
1
0
0
5
3
PSI
0
0
7
0
kPa
9.25 in. (235 mm)
7.94 in.
(202 mm)
6.36 in.
(162 mm)
Bottom View
Mounting Pattern
16-80 in. (427 mm)
9.25 in.
(235 mm)
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