1. The GRW SeriesDesigned for rental businesses
POWER FOR RENT

2. The GRW series has been conceived to work in a wide variety of applications where temporary power supply is
needed. These generators are the ideal solution for Rental companies, thanks to their versatility, high efficiency
and high structural resistance. They are easy to use and guarantee high degrees of protection, low noise
emissions and easy access for maintenance.
GRW Series
ALFA size layout
20-50kVA
BETA size layout
From 60kVA
LOW ENVIRONMENTAL IMPACT
Low noise emissions.
Fully integrated exhaust silencer inside wet section (provision for spark arrestor).
Fully bunded baseframe able to retain 110% liquids complete with leak detection sensor.
Heavy-duty diesel engine compliant with EU Stage 3A emission level and equipped with electronic
governor (except 20kVA).
LONG LASTING - LONG RUNNING
1000+H tested salt spray resistant canopy.
Large metal fuel tank (at least 20/24h autonomy depending on genset model) with internal baffles.
Wide access doors for easy service and maintenance.
Fork lift pockets.
Large and user-friendly command and control panel.
Canopy panels with cutting edge washable soundproofing material.
EASY USE AND MAINTENANCE
HIGH PROTECTION
Fully waterproof air inlet openings.
Synchronous brushless alternator with reinforced insulation for tropical environment.
Tropical cooling system.
From 60kVA

3. B
C
D
E
A
With a power from 20 to 560 kVA, these machines are provided with EU Stage 3A engines and top class brushless
alternators. They feature last generation components and offer a wide range of supplements for meeting the
most demanding applications.
I M a i n f e a t u r e s I
Pull bar
(on each side)
A
Single
lifting point
C
Bumpers for roof
protection and
easy stacking
(up to 200kVA)
B
B
C
D
Lube oil
drain pump
6-WAY fuel valve
for easy connection
to external storage
fuel tanks
Battery
switch
OUTSIDE VIEW:
Step for easy lifting
point snatching
E
Internal fuel
refilling
on each side

4. GRW SERIES
COMMAND AND CONTROL PANEL
The GRW series offers 3 different panel solutions to meet the most demanding customer needs.
MCP - Manual Control Panel ACP - Automatic Control Panel MPP - Modular Parallel Panel
I C o n t r o l p a n e l t y p e s I
POWER SECTION
Integrates high quality generating set circuit breaker
suitablyratedforthermalandmagneticoverloads.Large
and robust busbar with cable passage opening from
the bottom for easy power cable connection. Provided
with safety switch to trip circuit breaker if the panel door
is opened. Possibility to have different bus bar settings
to allow work with various earthing systems.
2
SOCKET SECTION
Integrates the selected socket kit, placed on the
front panel (customizable according to customer/
market needs) with a suitably rated circuit breaker as
protection for each socket. Remote start/stop pins,
plug for auxiliary power supply, multi-pin connector
for LTS connection and can-bus communication for
synchro (with MPP).
3
Integrates all control and command devices such as:
Digital control unit.
Analogue ammeter and voltmeter with selector
switch (only MCP).
Fuel level meter, mechanical hour counter and
analogue gauges for main engine parameters (oil
pressure, water temperature, engine speed).
Battery charger. Frequency switch, differential
protection with switch and potentiometer for
voltage adjustment.
Provision for remote control through GPRS modem
and Ethernet/Internet interface modules.
1 CONTROL SECTION
High protection
POWER SECTION
Integrates high quality generating set circuit breaker
suitablyratedforthermalandmagneticoverloads.Large
and robust busbar with cable passage opening from
the bottom for easy power cable connection. Provided
with safety switch to trip circuit breaker if the panel door
is opened. Possibility to have different bus bar settings
to allow work with various earthing systems.
2
SOCKET SECTION
Integrates the selected socket kit, placed on the
front panel (customizable according to customer/
market needs) with a suitably rated circuit breaker as
protection for each socket. Remote start/stop pins,
3
Analogue ammeter and voltmeter with selector
switch (only MCP).
Fuel level meter, mechanical hour counter and
analogue gauges for main engine parameters (oil
pressure, water temperature, engine speed).
Battery charger. Frequency switch, differential
protection with switch and potentiometer for
voltage adjustment.
Provision for remote control through GPRS
and Ethernet/Internet interface modules.
1
2
3
USER FRIENDLY HIGH DEGREE OF PROTECTION EASY TO CUSTOMIZE
IP 55

5. SUPPLEMENTS
GENSET EQUIPMENT
PHS - PREHEATING SYSTEM HDF - HEAVY DUTY AIR FILTER
To ensure fast start-up in cold environments
especially for stand-by applications.
To allow work in dusty environments lengthening
maintenance intervals.
QFC - QUICK FIT FUEL CONNECTORS
ESA - EXHAUST SPARK ARRESTOR ATEX
CERTIFIED
Fast fuel piping connection and genset installation.
To prevent the emission of flammable debris from
combustion sources and allow working in ATEX
zone 2.
WSP - FUEL WATER SEPARATOR FILTER ASV - AIR SHUT-OFF VALVE
Additional filters for higher engine safety when fuels
suffer high contamination.
Automatic genset stop when engine overruns in
environments rich of hydrocarburs.
VSS - VOLTAGE SELECTOR SWITCH (ALTERNATOR WINDING CONNECTION SWITCH)
For setting various genset voltage output configurations:
VSS1 - Star: 380-415V Three Phase 50Hz / 416-480V Three Phase 60Hz - Parallel Star 208-220V
Three Phase 60Hz
VSS2 - Star: 380-415V Three Phase 50Hz / 416-480V Three Phase 60Hz – Parallel Star 208-220V
Three Phase 60Hz – Delta: 230V Three Phases 50Hz
VSS3 - Star: 380-415V Three Phase 50Hz / 4416-480V Three Phase 60Hz - Double Delta: 230V
Single Phase 50Hz
VSS3 - Star: 380-415V Three Phase 50Hz / 4416-480V Three Phase 60Hz - Double Delta: 230V
Single Phase 50Hz (only for gensets size Alfa)
VSS4 - Star: 380-415V Three Phase 50Hz - Delta: 230V Three Phase 50Hz
HPP – HOT PARTS PROTECTION
To avoid accidental contacts with hot engine parts which may cause burns.
CONTROL PANEL
ADI-B - DIFFERENTIAL PROTECTION TYPE B
50
Hz
60
Hz
DFS - DUAL FREQUENCY SWITCH (50/60HZ)
Adjustable differential protection external to the
control board. AC & DC sensitive.
To allow work both frequencies changing genset
setting from a single switch.
TLP - TERMINAL LOW POTENTIAL RCG - REMOTE CONTROL MODULES
For remote signalization to external control system.
Modules for remote control through Modem/
Ethernet.
SPK - VARIOUS SOCKET KIT COMBINATIONS
To have proper socket configuration according to market/customer needs.
TRAILERS
STR - SITE TRAILERS RTR - ROAD TRAILERS
In order to have a trailer-mounted genset for non-
road use such as construction sites, big industrial
areas, large and remote working sites.
EU homologated road trailers for moving GRW
generatorstoanyfinaldestionation.Fixedoradjustable
tow bar to be used with every kind of vehicle.

6. Frequences/Voltages available
50Hz: 380-415V Three Phase / 220-240V Three Phase / 220-240V Single Phase
60Hz: 380-480V Three Phase / 208-240V Three Phase (excl. GRW22Y / only GRW67P)
50Hz: 380-415V Three Phase / 230V Three Phase
60Hz: 380-480V Three Phase / 208-240V Three Phase
I G e n e r a t o r s r a n g e I
I G R W P o w e r r a t i n g I
GENSET LTP PRP ENGINE ALTERNATOR
MODEL kVA kWe kVA kWe Brand Model Emission Level Brand Model
GRW 22Y 19,3 15,4 18,3 14,6 YANMAR 4TNV88-BGPGE EU Stage 3A LEROY SOMER LSA40-M5
GRW 35Y 38,2 30,6 36,3 29,0 YANMAR 4TNV98-ZGPGE EU Stage 3A LEROY SOMER LSA42.3-S5
GRW 50Y 47,0 37,6 44,6 35,7 YANMAR 4TNV98T-ZGPGE EU Stage 3A LEROY SOMER LSA42.3-M7
GRW 67P 66,0 52,8 60,0 48,0 PERKINS 1104D-44TG3 EU Stage 3A LEROY SOMER LSA42.3-L9
GRW 95P 93,7 74,9 85,0 68,0 PERKINS 1104D-E44TAG1 EU Stage 3A LEROY SOMER LSA44.3-S4
GRW 115P 110,0 88,0 105,0 84,0 PERKINS 1104D-E44TAG2 EU Stage 3A LEROY SOMER LSA44.3-S5
GRW 145V 147,5 118,0 132,5 106,0 VOLVO TAD750GE EU Stage 3A LEROY SOMER LSA44.3-M8
GRW 165P 165,0 132,0 150,0 120,0 PERKINS 1106D-E70TAG2 EU Stage 3A LEROY SOMER LSA44.3-L10
GRW 165V 166,2 133,0 151,3 121,0 VOLVO TAD751GE EU Stage 3A LEROY SOMER LSA46.2-M3
GRW 180P 178,7 143,0 162,0 129,6 PERKINS 1106D-E70TAG3 EU Stage 3A LEROY SOMER LSA46.2-M3
GRW 200V 198,3 158,6 177,7 142,1 VOLVO TAD752GE EU Stage 3A LEROY SOMER LSA46.2-M3
GRW 210P 209,8 167,8 190,0 152,0 PERKINS 1106D-E70TAG4 EU Stage 3A LEROY SOMER LSA46.2-M5
GRW 225V 220,4 176,3 200,0 160,0 VOLVO TAD753GE EU Stage 3A LEROY SOMER LSA46.2-M5
GRW 280V 275,0 220,0 250,0 200,0 VOLVO TAD754GE EU Stage 3A LEROY SOMER LSA46.2-L6
GRW 360V 356,9 285,5 325,4 260,3 VOLVO TAD1351GE EU Stage 3A LEROY SOMER LSA47.2-VS2
GRW 405V 402,4 321,9 365,0 292,0 VOLVO TAD1352GE EU Stage 3A LEROY SOMER LSA47.2-VS2
GRW 420V 424,6 339,7 385,8 308,6 VOLVO TAD1354GE EU Stage 3A LEROY SOMER LSA47.2-S4
GRW 455V 457,3 365,8 416,2 333,0 VOLVO TAD1355GE EU Stage 3A LEROY SOMER LSA47.2-S5
GRW 505V 500,0 400,0 455,0 364,0 VOLVO TAD1650GE EU Stage 3A LEROY SOMER LSA47.2-S5
GRW 565V 558,7 447,0 500,0 400,0 VOLVO TAD1651GE EU Stage 3A LEROY SOMER LSA47.2-M7
ALFA
2000x1200x1582
BETA
3360x1200x1950
BETA PLUS
3360x1200x2050
GAMMA
3810x1200x1930
DELTA
TBD
EPSILON
TBD
ZETA
TBD
PRP(kVA)
50
100
150
200
250
300
350
400
450
500
GRW 165-210P
GRW 145-165V
GRW 200-280V
GRW 22-50Y
GRW 67-115P
GRW SERIES
SIZE (Overall Dimensions)
GRW 505-565V
GRW 360-455V

8. PRAMAC produces, develops and distributes portable and industrial generators from 1 to 3360 KVA in standard and
customized solutions, to meet all customers’ needs from heavy duty activities to major power engineering projects.
PR INDUSTRIAL SRL
Località Il Piano, 53031 Casole d’Elsa (SI) Italy / Tel. +39 0577 9651, Fax: +39 0577 949076 / info@pramac.com / www.pramac.com
Worldwide Service & Parts Online Center: www.pramacparts.com
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