光星計測器（LIGHTSTAR） List of Products and Services

- Leakage Current Alarm Function Used to prevent leakage accidents in circuits, it connects with up to 16 zero-phase current transformers to measure current. When the current value exceeds the set threshold, it generates an alarm signal and sound. - Measurement Function Measures necessary electrical safety management parameters including line-to-line voltage, phase voltage, current, leakage current, active power, reactive power, apparent power, power factor, frequency, active energy, reactive energy, temperature (1CH), and phase. - Circuit Breaker Status Display and Control Function Receives input from circuit breaker status contacts to display the status with LEDs and generates relay contact output for circuit breaker control purposes. For inquiries, please contact "lightstar_1979@yahoo.co.jp". Power Multimeter

• Voltage Meter
• relay
• Other electronic measuring instruments

This device measures and displays the current flowing through the secondary grounding line of a transformer, and when the value exceeds the set limit, it can prevent accidents in advance through an alarm sound and relay. Features: - Displayed as waveforms and vectors - Measurement of lg, lgr, and lgc currents - Ability to identify leakage phases - RS-485 communication For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Ammeter
• Voltage Meter
• Board materials

This device measures and displays the current flowing through the secondary grounding wire of the transformer, and when the set value is exceeded, it can prevent accidents in advance through an alarm sound and relay. Features - Economical price - RS-485 communication For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Ammeter
• Other electronic measuring instruments
• Board materials

This is a device that re-outputs the insulated WP (power signal) and EOI (end of demand time signal) after receiving them from the power meter. - Power/Energy LED: W - Average power display / Wh - Leakage energy display - Signal LED - WP: Measurement pulse input status display - EOI: Time limit pulse input status display - COMM: Transmission signal display when connected via 485 communication - SET button: Enters setting mode when pressed for 3 seconds - FND display LCD: 6-digit display LCD - Displays power and energy - Displays set values when in setting mode - Unit display LED: Automatically lights up according to the unit (kW, kWh, MW, MWh) - Direction button: Changes display items in general mode (W: Average power / Wh: Cumulative energy) - Changes set values in setting mode Features - Displays expected power and energy based on user-defined time (1 minute, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 60 minutes) - Can connect to our company/other companies' demand and EMS devices without separate certification - Remote monitoring is possible using RS-485 communication (MODBUS-RTU) For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Power meter
• Signal Generator
• Board materials

This device measures and displays voltage, current, and frequency, and shows alarm values on the front screen when the set voltage and frequency values go out of range, activating each alarm relay. It has communication capabilities. - Voltage/Current Display LCD: Indicates voltage or current - Displays setting items during configuration - Indicator LED: Lights up when the values on each display LCD go outside the limit setting range - High: Red LED - Low: Blue LED - Frequency Display LCD: Indicates frequency - Displays setting items during configuration - SET button: Starts and saves settings - ▲ button: Changes values during settings, cancels alarms For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Ammeter
• Time-frequency measurements

This device measures and displays voltage and frequency, shows alarm values on the front screen when the set voltage and frequency are outside the specified range, and activates each alarm relay. - Voltage display LCD: Voltage indication - Displays setting items during configuration - Indicator LED: Lights up when the values on each display LCD are outside the limit setting range - Frequency display LCD: Frequency indication - Displays setting items during configuration - SET button: Starts and saves settings - ▲ button: Changes values during setting, cancels alarms For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Time-frequency measurements
• Board materials

This device is an instrument that displays measurements of voltage and current, frequency, active power, and power factor of a three-phase circuit on two LCD screens with two buttons, allowing for various voltage and current ratio settings. - Voltage display LCD: Line-to-line voltage and phase voltage displayed sequentially (3P3W: total 3 EA, 3P4W: total 6 EA) - Indicator LED: Indicates the measured phase for each display LCD Example of indication: VRS: R/S LED ON VRN: R LED ON AR: R LED ON IR: R LED ON Hz: B LED ON - Current display LCD: Displays each phase current, frequency, power, and power factor - VS button: Displays voltage for each circuit and sets voltage ratios - 3P3W: RS > ST > TR - 3P4W: RS > ST > TR > RN > SN > TN - AS button: Displays and sets current ratios for each circuit in the order of R > S > T > Hz > W > PF For inquiries, please contact "lightstar_1979@yahoo.co.jp". Electric multi-meter, electronic multi-meter.

• Voltage Meter
• Ammeter
• Board materials

This device is an instrument that displays the voltage and current of a three-phase circuit using two LCD screens and two buttons, allowing for various voltage and current ratio settings. - Voltage display LCD: Displays line-to-line voltage and phase voltage sequentially (3P3W: total 3 EA, 3P4W: total 6 EA) - Indicator LED: Indicates the measured phase for each display LCD Example of indication) VRS: R/S LED ON VRN: R LED ON AR: R LED ON - Current display LCD: Indicates the current for each phase - VS button: Displays the voltage for each circuit and sets the voltage ratio - 3P3W: RS > ST > TR - 3P4W: RS > ST > TR > RN > SN > TN - AS button: Displays the current in the order of R > S > T for each circuit and sets the current ratio For inquiries, please contact "lightstar_1979@yahoo.co.jp". Electric multi-meter, electronic multi-meter.

• Voltage Meter
• Ammeter
• Board materials

This is an instrument that measures/displays various electrical parameters such as phase voltage, current, line-to-line voltage, active power, reactive power, apparent power, power factor, frequency, active energy, reactive energy, harmonic voltage, and harmonic current, and is configured to allow remote monitoring of the measured data using RS-485 communication. It displays various measurement values, such as current usage rate, on a single LCD screen. Features: - Automatic saving and viewing of maximum values - Separate display of active energy and generated energy - LCD screen that displays clearly even in sunlight - Equipped with RS-485 communication for remote power quality monitoring - Displays power components by page for easy use by beginners For inquiries, please contact "lightstar_1979@yahoo.co.jp". Power Multimeter

• Voltage Meter
• Power meter
• Board materials

As an instrument for measuring the state of three-phase or single-phase power, it measures voltage, current, power, power factor, frequency, energy, and demand, and displays harmonics, unbalance rate, waveform, and vector to understand power quality. Features: - Displays voltage, current, power, frequency, power factor, energy, etc., on a single screen - Waveform, phase, and harmonics can also be checked - Equipped with RS-485 communication for remote power quality monitoring For inquiries, please contact "lightstar_1979@yahoo.co.jp". Power Multimeter

• Power meter
• Voltage Meter
• Other electronic measuring instruments

The power factor controller is a control device that receives the input of voltage and current from the electrical circuit and determines the power factor, allowing the user to maintain the desired power factor by controlling external capacitors. Features: - Control range settings can be divided between daytime and nighttime. - OFFSET settings can be configured in the device to correct power factor errors for each region. - In the event of incorrect wiring of input voltage or current, the system can correct the wiring error using a button on the front, even while the system is operational (patented). An optional communication (RS-485) function can be configured. *This product is a balanced power factor controller. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Other electronic measuring instruments
• Electrical Instruments/Electrometers
• Board materials

This is an instrument designed to measure and display various electrical parameters such as phase voltage, current, line voltage, active power, reactive power, apparent power, power factor, frequency, active energy, reactive energy, harmonic voltage, and harmonic current. It is configured to allow remote monitoring of the measured data via RS-485 communication. The LCD displays a variety of measurement values, including current usage rate, on a single screen. Features: - Automatic maximum value storage and viewing - Separate display of active energy and generated energy - LCD screen that remains clear even in sunlight - Equipped with RS-485 communication for remote power quality monitoring - Displays power components by page for easy use by beginners For inquiries, please contact "lightstar_1979@yahoo.co.jp". Power Multimeter

• Voltage Meter
• Power meter
• Board materials

This is a meter that allows remote power monitoring via RS-485 communication, displaying three-phase current, three-phase voltage, active power, power factor, reactive power, frequency, active energy, and reactive energy. Features: - Displays values of V, A, W, PF, var, Hz, Wh, and varh through three sections of an LCD, with buttons to select and display three-phase voltage, current, and W, PF, Var, Hz, Wh, varh. - Allows arbitrary setting of primary values for CT and PT. - RS-485 serial communication function. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Ammeter
• Power meter

This is an instrument that measures and displays the AC input voltage, DC output voltage, and current for battery charging and discharging in a substation rectifier panel, and allows for remote monitoring via RS-485 communication. Features: - Measures DC voltage and DC current (output current and battery current) and records the maximum value (MAX) - Allows for arbitrary setting of shunt primary value specifications - RS-485 serial communication function For inquiries, please contact "lightstar_1979@yahoo.co.jp". Power Multimeter

• Voltage Meter
• Ammeter
• Display

This is a device developed to reduce electricity costs for low-voltage power consumers. It allows users to input parameters such as the meter reading period and the number of working days in a month, and it outputs alarms or relay signals when usage exceeds the set values, helping to prevent excess usage charges. Remote management is possible through an HMI program. Features: - Measures three-phase active power and accumulates and displays active energy over one hour, daily, and monthly. - Responsible for monitoring and controlling to adjust power consumption. - Data such as power and energy can be transmitted via RS-485 communication for remote control and monitoring. - Monthly usage limits can be set based on target usage and working days. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Power meter
• Other electronic measuring instruments
• controller

This is a measuring instrument that indicates power factor. This product is a power factor meter. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Other electronic measuring instruments
• Board materials

Set limit values for alternating current, alternating voltage, direct current, and direct voltage. The output is divided into three forms, and only one value that satisfies the settings among HI, GO, and LO will be output. HI output: When the input reference value is greater than the HI setting, the HI relay is turned on and the HI LED lights up. GO output: When the input reference value is less than or equal to the HI setting and greater than or equal to the LO setting, the GO relay is turned on and the GO LED lights up. LO output: When the input reference value is less than the LO setting, the LO relay is turned on and the LO LED lights up. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Ammeter
• Voltage Meter
• Other electronic measuring instruments

This is a measuring instrument that indicates direct current power and electrical energy. The power meter (KDM-W) only indicates power (W) and electrical energy (±Wh). For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Power meter
• Other electronic measuring instruments
• Electrical Instruments/Electrometers

This is a measuring instrument that indicates single-phase alternating current power and electrical energy. The watt-hour meter (KDL-W) indicates only power (W) and electrical energy (±Wh). For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Power meter
• Other electronic measuring instruments
• Electrical Instruments/Electrometers

This is a measuring instrument that indicates three-phase alternating current voltage. The D/S button can be used to display RN, SN, TN, RS, ST, and RT. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Ammeter
• Electrical Instruments/Electrometers

This is a measuring instrument that indicates three-phase alternating current. You can display the R, S, and T phases using the D/S button. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Ammeter
• Voltage Meter
• Electrical Instruments/Electrometers

The energy meter is a device that indicates real-time electrical energy consumption. The energy consumption is continuously accumulated and displayed on the meter's LCD. It consists of electric contacts (Relay) and contactless (Open Collector). For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Power meter
• Electrical Instruments/Electrometers
• Voltage Meter

A thermometer is a measuring instrument that indicates temperature. Resistance temperature detectors (RTD) or thermocouple sensors (CA) can be used as applicable sensors. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Thermometer
• Electrical Instruments/Electrometers
• Other electronic measuring instruments

The frequency meter is a measuring instrument that indicates the operating frequency. The displayed value varies depending on whether the input voltage is AC 50~260 or AC 10V. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Time-frequency measurements
• Electrical Instruments/Electrometers
• Other electronic measuring instruments

The receiving indicator is a measuring instrument that indicates various elements in addition to current and voltage. The input can be selected from alternating current, alternating voltage, direct current, and direct voltage. The display units are as follows: 1: Power 2: Temperature 3: Voltage 4: Current 5: Frequency 6: Distance 7: Pressure 8: Ratio or percentage (power factor) 9: Speed 10: Mass 11: Rotational speed For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Other electronic measuring instruments
• Electrical Instruments/Electrometers
• Voltage Meter

KBY-□ is our company's shunt. A shunt is used to measure the current in a direct current circuit. When the current in the circuit exceeds the rated value of the ammeter, a parallel circuit is created with the ammeter to divert the current for measurement. The circuit (resistor) that diverts the current in this way is called a shunt. The rated current display value of the shunt indicates the maximum current that can be measured, while the rated voltage drop value refers to the voltage drop between the output terminals when the maximum current flows through the shunt. This varies depending on the specifications of the measuring instrument, primarily being 50 mV or 60 mV. The grade of the shunt is classified into 0.5% and 1.0% based on the allowable limit after passing 80% of the rated current for 15 minutes.

• Transformers
• Resistors
• Electrical Instruments/Electrometers

KBL-□□ is our current-limiting resistor. The current-limiting resistor (CLR) installed on the tertiary side of grounding-type instrument transformers is necessary when using selective ground fault relays (SGR) and directional ground fault relays (DGR). It generates the active power required to operate the SGR and DGR, absorbs the third harmonic generated by the GPT tertiary broken delta connection circuit, and suppresses abnormal neutral point conditions, potential oscillations, and neutral point instability phenomena in ungrounded circuits.

• Transformers
• Electrical Instruments/Electrometers
• transformer

KBG-□□□ is our indoor 1.15 kV transformer (PT). The primary voltage is 380/√3V or 440/√3V. It is used for zero-sequence voltage detection (tertiary) during faults in ungrounded lines. This product is a single-phase transformer, and three units are used in combination, with the connection method being Y connection for primary and secondary, and broken delta connection for tertiary. When the bus voltage is applied to the primary side, the secondary side can be used for relaying and measurement, while the tertiary side can be used for zero-sequence voltage detection. On the tertiary side, zero-sequence voltmeters, OVGR (overvoltage ground relay), ground fault confirmation LAMP, CLR, SGR, DGR, etc., can be connected for use. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Transformers
• Electrical Instruments/Electrometers
• transformer

KBV-□ is our pressure regulator. It can convert 300V to 3000V to DC 1mA or 4-20mA. It is composed of a simple resistive combination, so there is no insulation between input and output. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Transformers
• Electrical Instruments/Electrometers
• transformer

KBO-□□ is our transformer (PT). The primary voltage can be applied from 220 to 440V and can be converted to 110V or 220V. It has a built-in fuse for product protection. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

KBT-□□ is our company's transformer (PT). It is a transformer that can be applied from 220 to 460V. One of its features is that it is categorized into four sizes based on the rated load (VA) within the KBT series. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

KB□-□□ is our company's transformer. It is a transformer applicable for 220 to 460V. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

KBN is our discharge coil. It is connected in parallel with a large-capacity three-phase capacitor installed for automatic power factor compensation of the receiving equipment. After the capacitor is turned off, it discharges the residual charge in a short time, reducing charge collisions when the capacitor is turned on/off, thereby protecting nearby electrical equipment. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

The KBA-30 is our Rogowski coil. The welding current flows at a high current (approximately 100A to 50KA) for a short duration (0.001 seconds to 0.5 seconds), resulting in various waveform shapes that cannot be measured with a standard ammeter. However, the Rogowski coil can measure high currents without saturating due to its air core. However, when measuring power and power factor, it is necessary to convert the phase shift from 90° to 0° using an integrator (OP-AMP). For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

The KBK-□ is our company's direct mount current transformer. This product is not of the type that passes through wires or busbars; it is designed for direct mounting and use. There are three shapes available, and five different sizes. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

The KBK-08 is slightly different from our other CTs. While other CTs pass the electric wires or busbars directly through the product, this product is designed to be mounted with bolts. Additionally, the KBK-08 is a product eligible for bidding with Korea Electric Power (standard items). For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

KBM is our busbar type CT, particularly suitable for air circuit breakers (ACB). The range of primary current is very wide, from 100 to 12,000, allowing for versatile use. The KBM series has diversified the size of the CT to match the size of the circuit breaker. It offers more varieties than busbar CTs for circuit breakers, making it a versatile product that can be used in various situations. By installing three units, it can also be used like a three-phase CT. For the KBM-03 and KBM-25, production will continue until this year, and it is scheduled to be discontinued next year. However, new products KBM-13 and KBM-16 have been released, so the total number of varieties remains at nine. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

KBM is our busbar-type CT and is a product compatible with circuit breakers (CB). The primary current range is from 50 to 1600, allowing for a wide range of applications. The KBM series has diversified the size of the CT to match the size of the circuit breakers. Therefore, it is a recommended product for those who are unsure about choosing a CT for their circuit breaker. For inquiries, please contact "lightstar_1979@yahoo.co.jp".

• Electrical Instruments/Electrometers
• Transformers
• transformer

The "KAS-80□□" is a pointer-type analog meter. It measures AC current and AC voltage in a three-phase circuit. The size is the same as KA□-80. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please reach out to "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Ammeter
• Electrical Instruments/Electrometers

KA□-□D□" is a pointer-type analog meter. It has a red pointer attached to measure ordinary electrical elements. The setting pointer on the front can rotate left and right, making it easy to detect normal operating conditions. There are nine different sizes ranging from 50 to 11. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please email "lightstar_1979@yahoo.co.jp.

• Voltage Meter
• Ammeter
• Electrical Instruments/Electrometers

The "KAJ-11□□□" is a pointer-type analog meter. It has been equipped with a lighting function for measuring ordinary electrical elements. The KAJ-11 can also be categorized into KAJ-11□□A, KAJ-11□□C, and KAJ-11□□L depending on the type of auxiliary power supply. The KAJ-11□□A and KAJ-11□□C use ELP (emitting sheet) as the light-emitting method, while the KAJ-11□□L uses an LED lamp. The size is 11, the same as KA□-11. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please email "lightstar_1979@yahoo.co.jp".

• Voltage Meter
• Power meter
• Electrical Instruments/Electrometers

The "KAR-□80□" is a pointer-type analog meter. The meter relay consists of a detection part, an indication part, an amplification part, and a relay part. A combination of a light-emitting diode and a phototransistor is applied in the detection part to utilize a contactless method. Since there are no contact points when the pointer passes, it is not affected by external vibrations or shocks, and stable operation is possible using high-reliability electronic circuit components. Features: - High quality, high performance - Built-in protection circuit, simplified sequence circuit - The front screen is thin, transparent, and made of PC material - Compatible with 100~240V usage - Output contact capacity is AC 220V/1A, DC 30V/1A - Surge protection circuit applied to prevent damage in case of incorrect polarity wiring from the relay control power circuit - Impulse noise prevention circuit applied *For more details, please refer to the PDF materials or feel free to contact us. For inquiries, please email "lightstar_1979@yahoo.co.jp".

• Ammeter
• Voltage Meter
• Electrical Instruments/Electrometers

"KAH-□□" is a guideline-type analog meter. It is an instrument for measuring power factor. KAH has two types: balanced power factor meter and unbalanced power factor meter. KAH comes in two sizes, KAH-11 and KAH-08. The balanced type is designated as KAH-□B, while the unbalanced type is designated as KAH-□U. The sizes available are 11 and 08. KAH-11 is the same size as KA□-11, and KAH-08 is the same size as KA□-08. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please reach out to "lightstar_1979@yahoo.co.jp".

• Other electronic measuring instruments
• Electrical Instruments/Electrometers
• Power meter

KAI-□" is a guideline-type analog meter. It is an instrument that indicates reactive power. KAI comes in two sizes: KAI-11 and KAI-08. KAI-11 is the same size as KA□-11, and KAI-08 is the same size as KA□-08. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please reach out to "lightstar_1979@yahoo.co.jp.

• Power meter
• Other electronic measuring instruments
• Electrical Instruments/Electrometers

KAG-□" is a guideline-type analog meter. It is an instrument that indicates power. KAG comes in two sizes: KAG-11 and KAG-08. KAG-11 is the same size as KA□-11, and KAG-08 is the same size as KA□-08. *For more details, please refer to the PDF document or feel free to contact us. For inquiries, please reach out to "lightstar_1979@yahoo.co.jp.

• Power meter
• Voltage Meter
• Electrical Instruments/Electrometers