FRANK W.

MFR.

®

Generator Panel

MGC-95093B

Revised 03-00

Catalog Section 75

(00-02-0134)

MGC921 Series

■

Available in Manual or Auto Start

– 12 or 24 VDC Battery Voltage

– Single Phase or 3-Phase

■

Compact

■

Full Featured

Description

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 generators. Models MGC921 feature mechanical

SWICHGAGE ® s for engine oil and coolant temperature. Models MGC921E feature EGS electric 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.

Features

■ Auto-Start Panel includes the following features.

• ASM150, auto-start controller with:

– Optically-isolated noise resistant inputs.

– Outputs for fault annunciator.

– 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).

• 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.

• TEST-OFF-AUTO selector switch.

• Two 2-1/16 in. (52 mm) dia. holes, plugged.

■ Manual Start Panel includes the following features.

• Power OFF-ON toggle switch and start push button.

• 518APH TATTLETALE ® annunciator.

• 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.

• Two (2) 2-1/16 in. (52 mm) diameter holes, plugged.

■ AC meters

• AC voltmeter, 3-1/2 in. (89 mm) dial, ±2% full scale (specify range: 300 V or 600 V).

• AC ammeter, 3-1/2 in. (89 mm) dial, ±2% full scale (specify range: 50 to 4000 A).

• AC frequency meter, 120 V, 3-1/2 in. (89 mm) dial, ±0.6% Hz, 45–65 Hz.

• Frequency meter rheostat.

Options

■ AC ammeter-voltmeter phase selector switch*.

Requires 2 additional CTs.

■ Hourmeter, 2 in. (51 mm) dial, 5-digit.

■ Battery voltmeter, 2 in (51 mm) dial (range determined by battery voltage).

■ Battery ammeter, 2 in (51 mm), 60-0-60.

*Standard (included) with 3-phase models.

Specifications

■ Auto-Start Panel

• Power Requirements:

– 12 VDC battery for 12 V models.

– 24 VDC battery for 24 V models.

• Inputs: Ground or positive inputs for high temperature or low pressure sensors.

• 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).

• Cycle Crank Timer: Up to 8 attempts.

Recrank on false starts (fixed 30 seconds).

• Crank/Rest Cycle Timing: 4 to 25 seconds

(adjustable).

• Shutdown Time Delay: 1 to 25 seconds

(adjustable). Locks out low oil pressure and high temperature on start up.

• Crank Disconnect Speed Setting:

From 30 to 8500 Hz.

• Overspeed Trip Point Setting:

From 30 to 8500 Hz.

• Magnetic Pickup Input:

Requires 2 Vrms minimum.

■ Manual Start Panel

• Power Requirements:

– 12 VDC battery for 12 V models.

– 24 VDC battery for 24 V models.

• Operating Temperature: -4 to 140°F

(-20 to 60°C).

10 in.

(254 mm)

Dimensions

NOTE: Dimensions below apply to all MGC921 Series enclosures.

13 in.

(330 mm)

11 in.

(279 mm)

LOW PRESSURE

HIGH TEMPERATURE

OVERCRANK

OVERSPEED

ENGINE RUNNING

3

OFF

1

2

Front View

How to Order

Side View

Phase

MGC921-1 = 1-phase

MGC921E-3 = 3-phase

MGC921-1 = 1-phase

MGC921E-3 = 3-phase

Starting Type

A = Auto

M = Manual

DC Power Supply

12 = 12 VDC

24 = 24 VDC

AC Voltmeter

300 = VM300 (00007173)

600 = VM600 (00007180)

Options

DCAM60 = DC Ammeter (00000002)

DCVM = DC Voltmeter, 12 volt (00000545);

DC Voltmeter, 24 volt (00000859)

HM = DC Hourmeter (00004594)

PSS* = Phase Selector Switch (00004015)

* Optional on single phase model only.

AC Ammeter

50 = AM50 (00004430)

75 = AM75 (00004431)

100 = AM100 (00004432)

150 = AM150 (00004433)

200 = AM200 (00004434)

300 = AM300 (00004267)

400 = AM400 (00004304)

500 = AM500 (00007174)

600 = AM600 (00004435)

800 = AM800 (00004436)

1000 = AM1000 (00004437)

1200 = AM1200 (00004438)

1500 = AM1500 (00004439)

1600 = AM1600 (00004440)

2000 = AM2000 (00004441)

2500 = AM2500 (00004442)

3000 = AM3000 (00004443)

4000 = AM4000 (00004444)

Warranty

A two-year limited warranty on materials and workmanship is given with this Murphy product.

Details are available on request and are packed with each unit.

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

FRANK W. MURPHY MANUFACTURER P.O. Box 470248; Tulsa, Oklahoma 74147; USA tel. (918) 627-3550 fax (918) 664-6146 e-mail [email protected] http://www.fwmurphy.com

FRANK W.

Since 1939

BSI

E

G

IS

T ERED

F

IR

NATIONAL

ACCREDITATION

OF CERTIFICATION

BODIES

USA–ISO 9001

UK–ISO 9002

FM 28221

FM 29422

MFR.

®

FRANK W. MURPHY MFR.

CONTROL SYSTEMS & SERVICES DIVISION

P.O. Box 1819; Rosenberg, Texas 77471; USA

tel. (281) 342-0297 fax (281) 341-6006

e-mail [email protected]

FRANK W. MURPHY, LTD.

Church Rd.; Laverstock, Salisbury SP1 1QZ; U.K.

tel. +44 1722 410055 fax +44 1722 410088

e-mail [email protected]

http://www.fwmurphy.co.uk

FRANK W. MURPHY FRANCE

tel. +33 1 30 762626 fax +33 1 30 763989

MURPHY DE MEXICO, S.A. DE C.V.

Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje

San Luis Potosí, S.L.P.; México 78384

tel. +52-48-206264 fax +52-48-206336

e-mail [email protected]

FRANK W. MURPHY PTE., LTD.

No. 2 Tuas South Street 2,

Sprintecs Bldg., #02-01/02

Singapore 638042

tel. +65 863-1398 fax +65 863-0208

e-mail [email protected]

MURPHY SWITCH OF CALIFORNIA

41343 12th Street West

Palmdale, California 93551-1442; USA

tel. (661) 272-4700 fax (661) 947-7570

e-mail [email protected]

http://www.murphyswitch.com

MACQUARRIE CORPORATION

1620 Hume Highway;

Campbellfield, Vic 3061; Australia

tel. +61 3 9358-5555 fax +61 3 9358-5558

e-mail [email protected]

Printed in U.S.A.