Features

This product monitors the flow rate of oil and detects that the flow rate is less (or more) than the specified value. The flow rate detecting section is designed as a special piston that can control the passing flow rate change to an appropriate level. Accordingly, the scale divisions are arranged at equal intervals to facilitate the reading.

Example for Specifications

Specifications

FI-50

FR-50

Features

The insides of the thermo-sensor cylinder, capillary, and Bourdon tube are fill with liquid which changes volume with varying temperature. The liquid in the thermo-sensor cylinder is expand and contract as the temperature changes, and the pressure change in the Bourdon tube that is transmitted through the capillary is indicated as a temperature. Since the displacement of the Bourdon tube due to an internal pressure change is directly indicate on the scale division plate without passing through the transmission mechanism and expansion device, this product is excellent in vibration resistance.

This product is provide with an electric contact that operates the micro switch.

Specifications

Features

The vapor pressure type thermometer has the fastest instruction response function among metal thermometers and is not affect by ambient temperature. Therefore, this thermometer is widely use for temperature monitoring in important facilities. Capillary tube can extend up to 50m at manufacturing.

Specifications

BNUTV

SR35A

Features

1. Automatic compensation for pressure change due to temperature

This product is equip with a function to compensate pressure change of SF6 gas due to temperature by bimetal. This temperature compensating mechanism enables proper detection of a pressure drop due to SF6 gas leakage.

2. Complete removal of liquid leakage risks

With the inert liquid fill in the switch, high lubrication, anti-corrosion, and anti-vibration effects are improved in the internal mechanism with the standard model. The liquid free model is designe to enclose nitrogen gas in place of liquid and adopt an even more specialized internal mechanism giving it nearly the same capacity as the standard model.

3. Simple installation and removal through weight reduction

The case and other materials have been reconsider to realize a reduction in weight. (Standard model: 1.7kg → Liquid free model: 1.35kg)

4. Improvements to the working properties of wiring

The working properties of wiring have been improved by enlarging the terminal box and terminal screw dimensions.

Example for setting pressure

Unit:：MPa　　Setting temperature：20℃

Specifications

Features

1. Automatic compensation for pressure change due to temperature

This product is provide with a function to compensate pressure change of SF6 gas due to temperature by bimetal to keep the indicated pressure at almost the same level as the rated pressure.
This temperature compensating mechanism permits detecting a pressure drop due to SF6 gas leakage correctly.

2. Strong structure against shocks, vibrations, and pulsations

With the inert liquid filled in this switch, high lubrication, anti-corrosion, and anti-vibration effects can be provided in the internal mechanism.
The product is excellent in weather resistance and use both indoors and outdoors. Its fully sealed structure is free from oil leakage.

3. Maintenance-free and long life

Since this product was release, in various severe environments of high-temperature, high-humidity, and cold districts, having an actual service results for 10 years or more. In addition, this product requires no maintenance after it is install

4. Reliable quality based on our original technology and completely made in Japan

We guarantee an indication accuracy of ±1% F.S (= full scale) (at 20ºC). In addition of the standard model, we can supply specific models for cold districts which were developed by our excellent technology so that they could be operated in an environment of -50ºC. All their components are worked, assembled, and inspected in Japan.

Example for setting pressure

Unit：MPa　　 Setting temperature：20℃

Specification

Features

This product is a pressure gauge with alarm contacts for oil regulating tank, which is use the OF cable for ultra-high voltage power transmission. This pressure gauge indicates the pressure of insulating oil or insulating gas in the cable, and outputs an alarm when the pressure exceeds the specified range.

Specification

※ This product is manufacture on various specifications according to order.

Features

This product is used in the sealing oil unit of the hydrogen cooling type generator in power stations operated by combined cycle method, and to prevent pressurization to the oil flow inlet of the Differential pressure regulator keeping the pressure at the oil pump discharge port at an optional fixed value.

Specification

Features

This product is install in the supply oil piping system to supply higher oil pressure than the in-machine hydrogen pressure to the generator shaft sealing section in order to prevent the hydrogen cooling type generator in power stations operated by combined cycle method from leaking. This valve is operate so that the differential pressure from the inside of the machine may always be kept on a certain level.

Specification

The valve satisfies the following oil pressure and oil amount.

Features

This product can widely used as a measuring instrument for management and control of bearing temperature of turbine. The setting temperature can easily set by the temperature adjusting dial outside the measuring instrument.

Specification

※These products can manufactured by inductive load.

Features

The insides of the thermo-sensor cylinder, capillary, and Bourdon tube are fill with liquid which changes volume with varying temperature.

The liquid in the thermo-sensor cylinder is expand and contract as the temperature changes, and the pressure change in the Bourdon tube that is transmit through the capillary is indicate as a temperature.

Since the displacement of the Bourdon tube due to an internal pressure change is directly indicate on the scale division plate without passing through the transmission mechanism and expansion device, this product is excellent in vibration resistance.

Specification

Features

This product is design as the micro switch makes or brakes by the up-and-down of a float moving according to oil level.

It for oil level control of cooling device for the bearing of the waterwheel generator shaft.

It detects abnormality of the oil level and makes a warning signal or a stop signal.

Specification

FS－14G－1

FS－10

※The product can be also manufactured by inductive load.

Features

This product can widely use as a measuring instrument for temperature management and control of transformer.  We have one type for “winding” that performs temperature management by using a heating coil and the other type for “oil” that detects and controls the oil temperature.  We can manufacture various types as you specify whether the maximum indication, alarm contact, and shut-off contact are provided

Specification

※The “RE type” that is smaller and more lightweight than the RB type is also available(Weight:Approx.7kg).

Features

The vapor pressure type thermometer has the fastest instruction response function among metal thermometers and is not affect by ambient temperature. Therefore, this thermometer is widely use for temperature monitoring in important facilities. Capillary tube can extend up to 50m at manufacturing.

Specification

Features

1. Maintains the performance of the standard Pitot Relay that is durable against earthquakes.

Just like the standard Pitot Relay, an earthquake-proof structure that prevents any malfunctions due to an earthquake or vibration of the transformer itself is adopt

2. More economical

The body material is change to aluminum, which allowed more economical prices.

3. Lighter weight

It was successfully realize to decrease the weight by 45% from that of the traditional type. (24 kgs. of the traditional type  13 kgs. of the new type)

Attachment to and removal works from pipes can be carried out easier.

4. With abundant contact specification (available up to 2 contacts for gas accumulation and 3 contacts for rapid flow of insulation liquid)

It corresponds to a variety of contact specifications that could not be covered by the traditional Pitot Relay.

5. Corresponding to various types of flanges

We manufacture Pitot Relays that comply with each customer’s requirements for such as round flanges, square flanges, screw hole positions, screw hole dimensions, etc.

Specification

Features

The relay is provide with the first contact (slight failure contact) that is operate by gas to be generate by a slight accident and the second contact (serious failure contact) that is operat by an oil flow to be generate by a sudden pressure rise.

Specification

Optional Extra　

ⅰ） Gas Collector

It is a device gathering the resolution gas generated in transformer through a pipe from gas release valve of Buchholz relay.

ⅱ）Test pipe and Test pump

These are pipe attach inside the Buchholz relay and manual air pump for testing contact movement by blowing compresse air from the outside as it is install

Features

This product is installed the cooler for transformer and used to monitor the flow rate of the oil. This gauge indicates STOP and FLOW of oil flow. Electric contact device switched on STOP is provided.

Specification

Features

This product is used to indicate the level of oil in the transformer. This gauge indicates the oil level position by using a float. Electric contact device switched on upper or lower limit is provided.

Specification

Features

This is a safety valve to prevent the tank and belongings of transformer in power stations or substations from damaged by detecting abnormal pressure in the tank and discharging the nitrogen gas or oil use for insulation in the upper part of the tank to the air in a short time. This relief valve has electrical contact and operation indicator.

Specification