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Power-saving Equipment

Power-saving systems by Kawahara Electric Works are protecting the planet by conserving electricity.

Power-saving systems by Kawahara Electric Works
Stabilier for Power Supply Saver series
Saver series
Optimization of incoming voltage
Incoming overvoltage is automatically controlled to the appropriate level to prevent wasteful consumption and effectively conserve electric power.
KEW Invertor System
KEW Invertor System
Reduce power consumption by circulatory pumps, fans, etc
Pump and fan motors are set to the proper speed for the given load.
Total energy savings 10~15%

Stabilizer for Power Supply Saver series

We recommend our constant voltage controller to persons interested in reducing their utility bills.

Equipment of the Saver series controls electric power to the proper voltage.
More power is needed to transmit electricity, the longer the distance it must travel. For that reason, power companies transmit a voltage of 101·6 V to end-user households, therefore JIS specify that general electric appliances must operate at 100 V ·10%. The Saver series plays off this difference to conserve electric power by transforming the slightly high incoming voltage into a bottleneck-free usable voltage.
Effective use of resources is contributing to energy savings. The Saver series is protecting the planet by conserving electric power.

KEW Saver
5 big features of the Saver series

Original tolerance design, low loss * KEW saver only

Equipment is designed with directional winding cores to ensure a magnetic density that prevents non-load loss. Overload protection is also available for eventual non-loads losses, by designing for low impedance.

Propritary backup feature

Equipment instantly steps up voltage in the event of a sudden voltage drop. Low voltage is supplied by setting the supply voltage. Protective features are also built-in as preparation against possible troubles.

Proprietary safety and protectve features

Circuitry is designed to safely prevent power outages. These class H transformers also keep temperature spikes to a max. 75°C. If temperatures exceed 100°C in an overload, a thermostat trips whereby automatically switching to direct transmission.

Fully automatic voltage control

Equipment employs a 3-tap system and features automatic selection of direct transmission to enhance the power-saving effect.
(* The simple construction Edel Saver has a 2-tap system.)

Control unit (Fully automatic voltage controller)

A host of safety and protective features are incorporated to completely shut out power outages. Diagnostics can also be run to prevent sudden output drops.

KEW Invertor System

We have added safety concepts and control technologies to proprietary inverter features.

KEW's inverter systems reduce power consumption by decreasing motor speed when motor drive is unnecessary.
They not only produce great savings on electricity but also free up equipment capacity.
These inverter systems are widely used for circulation pumps, supply/exhaust fans, blowers/pumps for air conditioners, and other equipment employed by factories, hotels, golf courses and elsewhere.
In particular, our inverter systems that are specifically adapted our standard models for use with air conditioners are being increasingly introduced because of the good power-saving effect they bring.

KEW Invertor


Control is tuned to the variable flowrate of the air conditioner.

Air conveyance power during partial load running has been improved to accommodate the variable flowrate of the air conditioner, while the use of heat source energy has been improved by controlling outdoor air intake rate in order to optimize cooling water volume. These two technologies combine to thoroughly reduce air conditioning energy loss that normally accounts for a large portion of overall consumption.

Optimal control from a single controller

Air conditioner fan speed, cold/hot water control valves and outside air dampers are synched and automatically controlled so that power-saving operations run efficiently.

Easy-to-monitor power-saving effect

The indicated information can be switched between the actual integral power consumption and the estimated consumption from conventional operation so that users can quickly and easily identify the power-saving effect.

Blowers run more efficiently, thus reducing power consumption even during peak hours.

Base electricity rates billed by power companies should fall as inverter systems enable air conditioners to run more efficiently.

50 – 60% cut in annual power consumption for blowers

An inverter system enables air conditioners to run at the bare minimum air flowrate, which translates into additional power-savings.

5 - 10% reduction in annual consumption of heat source energy required for heating and cooling

Outside air intake is optimized to prolong outdoor air usage in cooling. During summer and winter, unnecessary outside air intake is cut back, to optimize cold/hot water consumption.

KEW Invertor
Example of installed inverter system
▲Example of installed inverter system

* The power-saving effect will vary according to loading rate and running time.