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12M55

Cylinder diameter

180 mm

Arrangement and number of cylinders

V12

Piston stroke

215 mm

Working volume

65.6 l

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Models

Diesel engine model	Nominal speed, min^-1	Engine power		Generator power				Boost type	Type control
		Prime Power (PRP), kW	Emergency Power (ESP), kW	Prime Power (PRP)		Emergency Power (ESP)
		Prime Power (PRP), kW	Emergency Power (ESP), kW	kW	kVA	kW	kVA
12M55G2300/5	1500	1850	2020	1700	2100	1900	2370	T/Water-V	CR
12M55G2550/5	1500	1985	2210	1800	2250	2000	2500	T/Water-V	CR
12M55G2750/5	1500	2200	2450	2000	2500	2300	2870	T/Water-V	CR
12M55G3000/5*	1500	2420	2700	2200	2750	2500	3100	T/Water-V	CR
12M55G2000/6	1800	2050	2230	1900	2370	1800	2200	T/Water-V	CR
12M55G2250/6	1800	2200	2420	2000	2500	2300	2870	T/Water-V	CR
12M55G2500/6	1800	2420	2700	2200	2750	2500	3100	T/Vod-V	CR

Designation: T/Vod-V = Turbocharger / CVD type "Water-Air", El.TNVD – mechanical fuel injection pump with electronic regulator, CR – fuelbattery type system.

^*: Engines are designed for Emergency Standby Power (ESP) only. The power (PRP) indicated is for reference only

Standard Equipment

Cylinder Block and Piston Group	Air Intake and Exhaust System
Cast Iron Cylinder Block. Inspection Ports for Each Cylinder. Crankcase/Oil Pan Power Structure. Flywheel Housing with Additional Space for Barrel Turning Device. Individual cylinder heads. 4 valves per cylinder. Forged crankshaft made of hardened steel with induction hardened main journals, connecting rod journals and fillets. Lightweight pistons with cooling and high-quality piston rings.	Overhead turbochargers optimized for the generator set. Air filters with clogging indicators. Thermal insulation of turbochargers, exhaust manifolds and pipes. Fuel system Filter-moisture separator assembly with transparent flask and water sensor, coarse and fine fuel filters. Electric fuel pump built into the filter block. Electrical system Electric starter 24V. Charging generator 55A. Oil pressure and coolant temperature sensors. Flywheel housing and flywheel Flywheel housing SAE 00 and flywheel 21”.
Cooling system
Cooling system with mechanically driven coolant pumps. Engines are supplied without a cooling unit.
Lubrication system
Full-flow fine oil filters with bypass valve. Water-oil heat exchangers. Centrifugal oil filters.

Engines dimensions

Diesel engine model	Nominal speed Min^-1	«L» «W» Width*, mm	"N" Height*, mm	"Dry" Weight, kg
12M55G2300/5	1500	3100	1550	2800	9550
12M55G2550/5	1500	3100	1550	2800	9550
12M55G2750/5	1500	3100	1550	2800	9550
12M55G3000/5*	1500	3100	1550	2800	9550
12M55G2000/6	1500	3100	1550	2800	9550
12M55G2250/6	1500	3100	1550	2800	9550
12M55G2500/6	1500	3100	1550	2800	9550
*motor only (no cooling unit)
Emergency Standby Power (ESP)			Prime Power (PRP)
Emergency Standby Power is the maximum power available to the varying load during the entire period of the fault main power supply network. The average load factor during 24 hours of operation shall not exceed 70% of the rated power of the ESP motor. Typical operating hours of the motor are 200 hours per year, with a maximum use of 500 hours per year. This includes an annual maximum of 25 hours per year at the rated power of the ESP. No overload is permitted. The motor shall not be used for long-term parallel operation.			Prime power is the maximum power of the generating set when operating on a variable load without limitation of operating time during the year with breaks for maintenance. For continuous operation over 24 h, the average permissible power shall not exceed 70% of the prime power (PRP). When determining the average actual power variable power values that are less than 30% of the prime power are taken as 30%, and the downtime is not taken into account.
Maintenance Scheduled maintenance every 500 engine hours. Increased service interval based on oil analysis. Operating time before major repairs is at least 32,000 engine hours. Engine life, taking into account three major repairs, is at least 120,000 engine hours.

12M55