NISHISHIBA ELECTRIC

NISHISHIBA ELECTRIC - NISHISHIBA ELECTRIC CO., LTD. Since its foundation in 1950, Nishishiba Electric Co., Ltd. has provided various power generation, industrial, and marine electrical systems for nearly 70 years, and their products and services have offered safety, security and convenience to customers and society.

In addition, Nishishiba's marine electrical systems, which enable safe and efficient navigation, are widely used in container vessels that carry goods around the world, LNG carriers that support energy security, and research vessels designed to carry out research at sea, ferryboats and other types of ships. Based on the technological development capabilities of the Toshiba Group, Nishishiba offers unique and sophisticated skills and capabilities as well as a wealth of expertise accumulated over the years. All these resources allow us to provide systems, component products and services that are high in quality, functionality and efficiency. A new rotary machinery factory has been completed in 2015. This will help us address customers' needs for today's large vessels and meet the growing demand for large-scale rotary machinery due to the increase in distributed power supplies. Nishishiba also offers high value-added and environmentally-friendly solutions that best fit electric propulsion ships and other types of ships.
Nishishiba continues to deliver solutions that meet the needs of customers in the social infrastructure sector, and contribute to the realization and development of a safe, secure and sustainable society together with its customers. Nishishiba is committed to leading the world as a provider of land and marine energy solutions.

Products

Electrical Products

Cutting-edge technology that is developed with an awareness for the global environment and energy conservation enables us to build a rich and comfortable lifestyle.
The stable supply of electrical energy could be considered the basis of social infrastructure.
To achieve this, we provide electrical machinery developed through high-level technology and rich knowledge, that is contributing to stable power supply and meeting needs in all kinds of areas, be it in office buildings, factories, hospitals or power plants.
Synchronous generators

Generator for diesel/gas engine

We provide power generators for use in various areas, including emergency use to protect civil life from power outages caused by earthquakes and other natural disasters, use in co-generation systems for environmental conservation and energy conservation, and use in providing backup power supply to important facilities such as hotels, hospitals, and computer centers that need to operate around the clock.
Our products can cater to almost all types of motors.

Switchboard

Environmentally conscious switchboard (on ship)

We provide a variety of switchboard products, including generator control boards for controlling upgraded power generation systems, various types of related high and low-voltage switchboards and switchgears, as well as monitoring control boards and motor control products, etc. as components of total systems.

Detection devices for isolated operation

Detection devices for isolated operation are system linkage protection equipment used for power generators that are connected to commercial power supply systems and perform reverse power flow. With the system developed by Nishishiba (QC mode frequency system), there is little influence on the power system, and it is easy to incorporate into generator control boards, whether newly installed or pre-existing.

Automatic Voltage Regulator

High-function AVR

The Automatic Voltage Regulator (AVR) is a piece of equipment essential for regulating power generator voltage. We provide products to match all power generation systems, such as our high-function, highly reliable digital control system, developed with Nishishiba know-how.

Marine Electrical Systems

Electric propulsion system

Inverter panel

NISHISHIBA's electric propulsion systems make a contribution to safety operation with redundancy, better operation with lowest vibration and sound noise and minimized machinery space.
Nishishiba proposes best solution against the harmonics produced by inverters.
The inverter for propulsion motor can be used for other applications (bow thruster, cargo pump, loading compressor motor, etc)
By multiple inverters integrated control system, the both applications can be operated at the same time. (Patented)

Shaft driven generating system

Shaft generator (High voltage)

NISHISHIBA's shaft driven generating systems make a contribution to saving of maintenance work as well as saving energy.
Various driving arrangement such as intermediate shaft mounting, overhang on main engine, and step-up gear connection.
Direct connection to 6.6kV main bus without step-up transformer.
The control system has adopted digital control to get high reliability and control performances and to realize easy operation and maintenance.
Additional functionality of motor only as generators can be applied to a variety of purposes.
Assisting of the main engine by booster mode at the peak, the rated output of the main engine can be reduced.
The propulsion mode can be used for slow-speed operation without main engine or emergency operation at main engine failure.

Inverter driven system

Inverter control panels

Inverter driven system controls speed of the motor to drive auxiliary machinery in ships at optimum speed and contributes energy-saving operation.
Proven various applications such as cooling seawater pump, cargo pump, and L/D compressor for LNG ship.
Proposal of energy saving with best speed control of cooling seawater pumps.
By applying a sensor-less vector control system, motor can be controlled smoothly even at low-speed area with the high torque.
By applying the vector control system with a sensor, application for crane control is possible.

Drive device for electric driven winch

Electric driven winch

High reliability and easy operation by inverter driven with vector control.
Various merits:

No risk of causing environmental pollution from oil leaks.
Easy outfitting due to no hydraulic piping.
Maintenance free without oil change and piping maintenance.
Improvement of mooring efficiency by triple speed operation on low loads.

Electric vibration balancer

The electric balancer reduces the ship's hull vibration by generating the vibration of same frequency and negative phase to the ship’s hull vibration which is the secondary harmonics to the revolution of the main engine.
Wide range of vibratory force, 11 to 154 kN.
The electric balancer can be easily applied to the existing vessel.

Generator

Protected drip proof with air filter (IP22)

Brushless A.C. generators meet various needs of marine field and output voltage from low voltage (A.C. 450V) to medium voltage (A.C. 11kV).
Both diesel engine and turbine driven generator are applicable.
From low voltage (A.C. 450V) to medium voltage (11kV) is applicable.
Standard enclosure is either drip proof (IP22) or totally enclosed with water cooled air cooler (IP44).
Highly reliable F class insulation system is applied.

Motor

Totally enclosed (IP44)

Induction motors are used to drive all kinds of machineries in ships such as bow-thrusters , F.D. fans and oil pumps for deck-machineries. Standard induction motors in compliance with JEM standard (and IEC standard) are also applicable.
From low voltage (A.C.450V) to medium voltage (11kV) is applicable.

Fan

Explosion-proof axial-flow fan

Fans and blowers such as internal motor type axial flow fans, axial flow fans with bent-duct, turbo fans and sirocco fans used for ventilator of each division, forced draft fans, pump room fans and auxiliary blowers for the main engine are available. For ventilation of cargo hold of the vessel such as RO/RO, explosion-proof internal motor type axial flow fans are available from our standard products.