The TZY-AIP500 anti islanding protection device is a new generation device independently developed and produced by our company, mainly used to prevent islanding effects in the power grid. Isolation is an electrical phenomenon that occurs when a part of the power grid is disconnected from the main grid, and this part of the power grid is completely powered by photovoltaic systems. Isolation can damage the public, maintenance personnel of power companies, and the quality of power supply. Therefore, anti islanding devices must be equipped in photovoltaic power plants. The device is mainly suitable for small power grid connected power supply systems of 10KV and low-voltage 380V photovoltaic power stations. In the event of islanding, the grid connection point can be quickly cut off. Quickly disconnect this station from the grid side.

The TZY-AIP500 anti islanding protection device has a simple structure, easy operation, high reliability, small size, easy installation, and convenient replacement for users.

1.2.1 Device Function

a) Two low frequency/over frequency protection: Each set value and time can be independently adjusted. Each section is set with an independent control word to select whether the function is activated, that is, the outlet can be selected or used for low-frequency splitting and high-frequency cutting or low-frequency self starting standby units according to the settings.

b) Two stage low/overvoltage protection: Each stage's setting and time can be independently adjusted. Each section is set with an independent control word to select whether the function is activated, that is, the outlet can be selected or used for low-voltage/overvoltage disconnection, low-voltage self starting backup units, or overvoltage shutdown, etc.

c) Slip locking function: When the slip exceeds the set value, the locking device exits.

d) Normal voltage detection and closing function: When voltage is detected in the device, automatic closing is allowed and the device closes at the outlet.

e) Two stage reverse power protection

f) Frequency mutation protection

1.2.2 Measurement Function

a) Measure the frequency and frequency change rate of the installation point busbar;

b) Measure the voltage and voltage change rate of the installation point busbar.

1.2.3 Self checking function of the device

a) Automatically detect faults in RAM, ROM, A/D, etc;

b) Automatically detect parameters such as settings, configurations, and coefficients;

c) The device has a power loss alarm function.

1.2.4 Event recording function

a) Recording event content includes protection action events, alarm events, and device self-test faults;

b) Record the type and timing of protective action events; Record the type and occurrence time of self checking faults in the device.  

1.2.5 Communication function

The device has a communication interface RS485, which can achieve communication with the monitoring system. There are two types of communication protocols.

1. ATN-101 protocol, MODBUS (custom protocol)

2. IEC60870-5-103 protocol

1.2.6 Monitoring function

a) Display voltage and frequency;

b) Collect other switch signals such as circuit breaker and isolation switch position signals;

1.2.7 Display operation function

The panel has a large LCD Chinese character display and keyboard operation function, which can facilitate data tracking and monitoring, online modification of settings, or switching on/off certain protection functions. When a fault occurs, a corresponding prompt screen will automatically pop up. The panel also has running, abnormal, alarm, low voltage, low frequency, and backup indicator lights.

1.3 Main features of the device

1.3.1 High performance hardware system

This device adopts a 32-bit microprocessor and an independent hardware watchdog. The high-performance hardware system ensures that the device has strong data processing capabilities.

1.3.2 Multi functional hardware platform

This device integrates multiple functions such as protection, signaling, and remote control.

1.3.3 Comprehensive Protection Design

This device has an independent protection action (or alarm) outlet, with protection action memory and signal retention functions. The protection principle is mature and reliable, and can withstand long-term on-site operation tests.

1.3.4 Complete Event Record

This device is equipped with a large capacity ferroelectric RAM, which can store relevant operation, alarm, and accident records, and data will not be lost in case of power failure.

1.3.5 Complete self checking function

The self checking function of this device includes A/D self checking, constant value self checking, coefficient self checking, configuration self checking, remote signaling self checking, communication self checking, etc., which facilitates timely detection of faults and ensures the reliable operation of the device.

1.3.6 Real time clock system

This device comes with a built-in clock that will not be lost in case of power failure.

2、 Main technical data

2.1 Rated DC data

a) Voltage 220V, 110V (to be specified when ordering);

b) The ripple coefficient of the DC voltage shall not exceed 2%, and the allowable voltage fluctuation is 80-115% of the rated voltage.

2.2 Rated AC data

a) AC voltage: 100V

b) Frequency fn: 50HZ

2.3 Measurement accuracy

a) Frequency measurement error less than ± 0.01 Hz (45-55 Hz)

b) The relative error of voltage effective value measurement is less than ± 1% (voltage is 0.2-1.2UN)

c) DF/dt measurement error less than 0.1 HZ/S

d) Delay error less than 0.02 seconds

2.4 AC power consumption

The AC voltage circuit has a rated parameter of less than 0.5VA per phase

2.5 Insulation performance

a) Insulation resistance: The insulation resistance between all circuits and the casing of the device shall not be less than 500M Ω under standard experimental conditions.

b) Dielectric strength: The dielectric strength of all circuits and enclosures of the device can withstand AC 50Hz, voltage 2kV (effective value), and conduct a 1-minute experiment without insulation breakdown or flashover. When rechecking the dielectric strength, the test voltage value is 75% of the specified value.

2.6 Impulse voltage

a) Complies with the requirements of GB/T15145-2001.

2.7 Anti interference capability

a) The device complies with the fourteen electromagnetic compatibility testing standards of IEC.

2.8 Mechanical Properties

a) Working conditions: The device can withstand vibration response and impact response tests with a severity level of I;

b) Transportation conditions: The device can withstand vibration durability, impact, and collision tests with a severity level of I.

2.9 Environmental conditions

2.9.1 Normal working atmospheric conditions

a) Environmental temperature: -10 ℃~+50 ℃;

b) Relative humidity: not greater than 95%, no condensation;

2.9.2 Storage and transportation environment temperature

The storage and transportation environment temperature of the device is -25 ℃ to+70 ℃. Without applying any excitation, the device should not undergo irreversible changes and should be able to work normally after the temperature is restored. The packaged device should be stored at a relative humidity atmospheric pressure of 80-110 kPa (equivalent to an altitude of 2 km or less).

2.9.3 Surrounding Environment

The usage location of the device should be free from explosion hazards, corrosive gases, conductive dust, and severe mold. There are measures to defend against rain, snow, wind, sand, dust, and static electricity.

3.1 Fixed value setting range

Voltage setting range: 5-120.00V

Frequency setting range: 45.00-55.00Hz

Time setting range

Low frequency protection: 0.1s~120.00s

Low voltage protection: 0.1s~120.00s

3.2 Fixed value error

Voltage setting error: within ± 3%

Frequency setting error: within ± 0.02Hz

Action time: less than 1 second, with an average error of no more than 35ms in action time

More than 1 second, with an average action time error of no more than ± 2.5%

3.3 Remote signaling resolution

No more than 2ms