1. Introduction
The Kemot SER-1000 Automatic Voltage Regulator (AVR) is designed to provide a stable output voltage of 230V ± 5% regardless of fluctuations in the input power supply. This ensures the efficient and safe operation of connected electronic devices, especially those sensitive to power quality. It is suitable for use in homes and offices, protecting audio/video equipment, computers, and other appliances.
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Kemot SER-1000 AVR. Please read it thoroughly before using the device.
2. Safety Instructions
- Read all instructions: Before operating the device, read and understand all safety and operating instructions.
- Indoor use only: This unit is designed for indoor use in dry environments. Do not expose it to rain, moisture, or extreme temperatures.
- Ventilation: Ensure adequate ventilation around the unit. Do not block ventilation openings.
- Power source: Connect the AVR only to a grounded power outlet with the correct voltage and frequency as specified in the specifications.
- Overload protection: Do not overload the AVR beyond its rated capacity (1000 VA). This can cause damage to the unit and connected devices.
- High voltage: This unit operates with high voltage. Only qualified personnel should open or attempt to service the unit.
- Cleaning: Disconnect the unit from the power supply before cleaning. Use a dry cloth; do not use liquid cleaners.
- Placement: Place the unit on a stable, flat surface. Avoid placing it near heat sources or in direct sunlight.
3. Product Features
- Automatic voltage regulation to maintain 230V ± 5% output.
- Toroidal C.R.G.O. transformer for stable operation.
- Comprehensive protection against over-voltage, under-voltage, overload, overheating, and short-circuits.
- Selectable delay function (180 seconds or 6 seconds) for connected devices.
- LED display for real-time input and output voltage monitoring.
- Compact and robust design.
Figure 3.1: Front view of the Kemot SER-1000 AVR, displaying input and output voltage on its digital screen.
4. Specifications
| Parameter | Value |
|---|---|
| Model | URZ3412 - SER-1000 |
| Rated Power | 1000 VA |
| Input Voltage Range | 145-260 V AC |
| Input Frequency | 50/60 Hz |
| Output Voltage | 230 V AC |
| Output Frequency | 50/60 Hz |
| Output Precision | ± 5% |
| Output Phase | Single phase |
| Transformer Type | Toroidal C.R.G.O. |
| Efficiency | 98% |
| Protection | Over/under voltage, overload, overheat, short-circuit |
| Delay Function | No delay / 180 seconds / 6 seconds |
| Operating Temperature | 0 ~ 40 °C |
| Relative Humidity | 10% ~ 90% |
| Storage Temperature | -15 ~ 45 °C |
| Dimensions (L x W x H) | 23.5 x 14.5 x 17 cm |
| Weight | 3.05 kg |
| Amperage | 4.35 A |
| Plug Format | Type C |
| Country of Origin | China |
5. Setup
- Unpacking: Carefully remove the AVR from its packaging. Inspect the unit for any signs of damage during transit.
- Placement: Place the AVR on a flat, stable, and dry surface. Ensure there is sufficient space around the unit for proper ventilation. Avoid direct sunlight, heat sources, and areas with high humidity.
- Power Connection:
- Ensure the AVR's power switch is in the "OFF" position.
- Connect the AVR's input power cord to a grounded wall outlet (230V AC, 50/60Hz).
- Device Connection:
- Ensure the devices you intend to connect are turned off.
- Plug the power cords of your electronic devices into the output sockets on the rear of the AVR. Do not exceed the total rated power of 1000 VA.
Figure 5.1: Rear view of the Kemot SER-1000 AVR, illustrating the output sockets, power input, and circuit breaker.
Figure 5.2: Example setup diagram showing the AVR protecting multiple electronic devices.
6. Operating Instructions
- Powering On:
- After connecting all devices, switch the AVR's power button to the "ON" position.
- The LED display will illuminate, showing the input voltage.
- The AVR will perform a self-test. During this time, the "DELAY" or "UNDELAY" indicator may light up.
- Delay Function:
- The AVR features a selectable delay function (180 seconds or 6 seconds) to protect connected devices from rapid power fluctuations or surges during startup.
- Press the "DELAY/UNDELAY" button to toggle between the delay modes. The corresponding LED will indicate the selected mode.
- It is recommended to use the delay function for sensitive electronics like refrigerators or air conditioners.
- Voltage Regulation:
- The AVR continuously monitors the input voltage and automatically adjusts the output to maintain a stable 230V ± 5%.
- The LED display will show both the input and regulated output voltage.
- Protection Indicators:
- If the input voltage goes outside the acceptable range (145-260V), or if an overload, overheat, or short-circuit occurs, the AVR will activate its protection mechanisms and may shut down to protect connected devices.
- Refer to the Troubleshooting section for resolving protection-related issues.
- Powering Off:
- To turn off the AVR, switch the power button to the "OFF" position.
- It is advisable to turn off connected devices before turning off the AVR.
Figure 6.1: Voltage regulation graph demonstrating the AVR's ability to stabilize input voltage.
7. Maintenance
- Cleaning: Regularly clean the exterior of the AVR with a soft, dry cloth. Do not use liquid or abrasive cleaners. Ensure the unit is disconnected from the power supply before cleaning.
- Ventilation: Keep the ventilation openings clear of dust and debris to prevent overheating.
- Inspection: Periodically inspect the power cord and plugs for any signs of damage. If any damage is found, discontinue use and contact qualified service personnel.
- Storage: If storing the unit for an extended period, disconnect it from the power supply and store it in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| AVR does not power on. | No power from wall outlet; power cord not properly connected; AVR power switch is OFF. | Check wall outlet with another device; ensure power cord is securely plugged in; switch AVR power to ON. |
| Output voltage is unstable or incorrect. | Input voltage is outside the AVR's operating range (145-260V); AVR is overloaded. | Verify input voltage with a voltmeter; reduce the total load connected to the AVR. |
| AVR shuts down unexpectedly. | Overload protection activated; over-voltage or under-voltage protection activated; overheating. | Reduce load; check input voltage; ensure proper ventilation; press the circuit breaker reset button on the rear if tripped. |
| Connected devices do not receive power after AVR powers on. | Delay function is active; device power switch is OFF. | Wait for the delay period to complete; ensure connected devices are switched ON. |
Figure 8.1: Rear panel detail showing the circuit breaker reset button.
9. Warranty and Support
The Kemot SER-1000 Automatic Voltage Regulator comes with a 2-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
The warranty does not cover damage resulting from:
- Improper installation or operation.
- Unauthorized modifications or repairs.
- Accidents, misuse, abuse, or neglect.
- Natural disasters or external causes.
For warranty claims or technical support, please contact your retailer or the manufacturer's customer service. Please have your proof of purchase and the product model number (URZ3412) available when contacting support.
Figure 9.1: Product packaging indicating a 2-year warranty.
