Hahn & Sohn C70NG petrol generator

C70NG is a natural gas generator for locations where natural gas is available and three-phase 400 V / 50 Hz power of up to 68.75 kVA is required. The Cummins 4BTAA3.9-G58 engine has 4 cylinders and a displacement of 3.9 l, is turbocharged with charge air cooling (air-to-air). Rated speed is 1,500 rpm and engine speed is controlled by the engine control unit (ECU).

• The electrical section consists of a single-bearing Stamford S1L2-Y1/50KW alternator with brushless self-excitation, IP 23 protection, class H insulation, and voltage regulation accuracy of ±0.5%. The alternator has 12 leads.
• Control is provided by the ComAp InteliLite 4 AMF25 with a 7-digit display, integrated speed governor and AVR. The controller monitors generator output (kW, kVA), protects against overload, monitors start failure, and enables emergency shutdown.
• The gas section of the engine compartment contains a gas line with valve, pressure gauge, and gas detector with a digital display. The inside of the enclosure is lined with sound-absorbing material, the doors are secured with locks, and the engine compartment is accessible from both sides.
• Gas consumption at continuous output: 19 m³/h at 100%, 15 m³/h at 75%, 10 m³/h at 50%, and 5 m³/h at 25% load.
• Directly on the machine are four industrial three-phase sockets mounted on a common rail and labelled L1-L4. The switchboard contains a main four-pole CHINT 100 A circuit breaker with leakage current protection and a set of circuit breakers for the individual outputs. The control panel is located behind a transparent window, and the enclosure is fitted with an emergency stop button. The base frame has forklift pockets.

Why customers choose it

• Natural gas operation - runs on natural gas from a fixed supply, with no need to refill diesel or petrol.
• Cummins engine and Stamford alternator - branded components.
• Three-phase 400 V output with 62.5 kVA (prime) / 68.75 kVA (standby) output - suitable for commercial premises, construction sites, and backup power.
• Sound-insulated enclosure - 74 dB at 7 m.
• ComAp AMF25 controller with display and protection functions.
• Gas detector in the engine compartment.
• Industrial sockets directly on the machine and a circuit breaker with leakage current protection
• 12-month or 1,000 operating-hour warranty on both the engine and alternator (whichever occurs first).

Practical tip

When planning the installation, allow for a weight of 1,196 kg and dimensions of 2,500 x 1,050 x 1,500 mm. Connection to the gas supply and exhaust system should be carried out by an authorised specialist company.

Key features

• Output 62.5 kVA / 50 kW (prime), 68.75 kVA / 55 kW (standby)
• Fuel: natural gas
• Voltage 400 V, 50 Hz, three-phase, rated current 89 A
• Cummins 4BTAA3.9-G58 engine, 4 cylinders, 3.9 l, turbocharged with charge air cooling
• Stamford S1L2-Y1/50KW alternator, IP 23, class H insulation, AVR ±0.5%
• ComAp InteliLite 4 AMF25 controller, 7-digit display
• Noise level 74 dB at 7 m
• Gas detector and gas line with valve and pressure gauge
• 100 A main circuit breaker, four sockets on the machine, emergency stop button
• Warranty 12 months / 1,000 hours

Use / Installation / Operation

• Designed for operation with a natural gas supply.
• The machine is supplied as one complete unit on a frame designed for forklift handling.
• Installation of the gas supply, exhaust system, and connection to the electrical mains must be carried out by an authorised specialist company.
• The installation, operating, and maintenance manual (safety instructions, installation, handling, commissioning, battery maintenance) is available for download from the product page.
• Fluid capacities: engine oil 16.4 l, coolant (engine only) 10 l.