®
MGC-95093B
Revised 03-00
Catalog Section 75
(00-02-0134)
FRANK W.
MFR.
Generator Panel
MGC921 Series
I
Available in Manual or Auto Start
– 12 or 24 VDC Battery Voltage
– Single Phase or 3-Phase
I
I
Compact
Full Featured
I Manual Start Panel includes the
following features.
Description
Specifications
The MGC921 provides economical engine and
generator control for applications not requiring
NFPA-99 or NFPA-110 approval. Models are
available for Manual or Automatic start designed
for 3-phase, 4-wire or 1-phase, 3-wire genera-
tors. Models MGC921 feature mechanical
SWICHGAGE®s for engine oil and coolant tem-
perature. Models MGC921E feature EGS elec-
tric SWICHGAGE®s. The panels are housed in a
13 x 10 x 11 in. (330 x 254 x 279 mm) shock
mounted NEMA 1 drip-proof enclosure. Current
transformers (CT’s) are not included.
I Auto-Start Panel
•
Power OFF-ON toggle switch and start
push button.
•
Power Requirements:
– 12 VDC battery for 12 V models.
– 24 VDC battery for 24 V models.
•
•
518APH TATTLETALE® annunciator.
•
•
Inputs: Ground or positive inputs for high
temperature or low pressure sensors.
Auxiliary starter relay. Contact rating: 12 volt,
40 amp/24 volt 16 amp.
Oil Pressure SWICHGAGE®, 2 in (51 mm)
dial, 0-100 psi (0-689 kPa) [6.89 bar].
Temperature SWICHGAGE®, 2 in (51 mm)
dial, 130-250°F (54-121°C), 12 ft. (3.7 m)
capillary.
Outputs:
•
•
– Auxiliary starter relay. Contact rating:
12 volt, 40 amp/24 volt 16 amp.
– 300 mA transistors for fault annunciation
•
•
•
•
Operating Temperature: -4 to 140°F (-20 to
60°C).
•
Two (2) 2-1/16 in. (52 mm) diameter holes,
plugged.
Cycle Crank Timer: Up to 8 attempts.
Recrank on false starts (fixed 30 seconds).
Features
I Auto-Start Panel includes the following features.
I AC meters
Crank/Rest Cycle Timing: 4 to 25 seconds
(adjustable).
•
ASM150, auto-start controller with:
– Optically-isolated noise resistant inputs.
– Outputs for fault annunciator.
•
•
•
•
AC voltmeter, 3-1/2 in. (89 mm) dial, ±2%
full scale (specify range: 300 V or 600 V).
Shutdown Time Delay: 1 to 25 seconds
(adjustable). Locks out low oil pressure and
high temperature on start up.
AC ammeter, 3-1/2 in. (89 mm) dial, ±2%
full scale (specify range: 50 to 4000 A).
– Crank/rest cycle timer, 4 to 25 sec. adjustable.
– Shutdown time delay, 1 to 25 seconds
(adjustable), locks out low oil pressure
and high temperature on start-up.
– Crank disconnect and overspeed
sensing operates from a magnetic pickup
signal (requires 2 Vrms minimum).
AC frequency meter, 120 V, 3-1/2 in. (89
mm) dial, ±0.6% Hz, 45–65 Hz.
•
•
Crank Disconnect Speed Setting:
From 30 to 8500 Hz.
Frequency meter rheostat.
Overspeed Trip Point Setting:
From 30 to 8500 Hz.
Options
•
Magnetic Pickup Input:
I AC ammeter-voltmeter phase selector switch*.
•
•
•
Auxiliary starter relay. Contact rating: 12 volt,
40 amp/24 volt 16 amp.
Oil pressure SWICHGAGE®, 2-1/16 in. (52
mm) dial, 0-100 psi (0-689 kPa) [6.89 bar].
Temperature SWICHGAGE®, 2-1/16 in (52
mm) dial, 130-250°F (54-121°C), 12 ft.
(3.7 m) capillary.
Requires 2 Vrms minimum.
Requires 2 additional CTs.
I Manual Start Panel
I Hourmeter, 2 in. (51 mm) dial, 5-digit.
•
Power Requirements:
I Battery voltmeter, 2 in (51 mm) dial (range
determined by battery voltage).
– 12 VDC battery for 12 V models.
– 24 VDC battery for 24 V models.
I Battery ammeter, 2 in (51 mm), 60-0-60.
•
Operating Temperature: -4 to 140°F
(-20 to 60°C).
•
•
TEST-OFF-AUTO selector switch.
*Standard (included) with 3-phase models.
Two 2-1/16 in. (52 mm) dia. holes, plugged.
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