National Service hotline:
1, fault disconnecting device TC-3088, TC-3088H application range
TC-3088, TC-3088H photovoltaic fault disconnecting device is suitable for clean power supply or small power supply grid connected power supply system, and its public grid distribution system (by a distribution transformer 10KV380V) together with grid power supply。Due to the system side failure of the large power system connected to the grid, if the small power system continues to operate, there will be an island effect.Meanwhile, the system reclosing function is affected.This will be very harmful to the on-site photovoltaic power generation equipment and personal safety and system grid, the general site needs to install a fault disconnecting device, in the event of a system failure, the fault disconnecting device first, and disconnect from the large power system。Ensure the safe operation of large power supply system.Therefore, the device can fully meet this function。
The task of PV fault disconnecting device is to monitor the low-voltage side of distribution transformer in real time.Necessary control of clean power supply。The microcomputer device and control circuit specially designed for the device are used to ensure the rapidity of the action and the accuracy of the control。
2. Main features of fault disconnecting device TC-3088
2.1 TC-3088 device can be centrally assembled or dispersed on the high voltage switchgear，Each interval functions independently，The devices are connected only by a network，Information sharing，This makes the whole system not only flexible，And its reliability has also been greatly improved，The failure of any one device affects only one local component。
2.2 device adopts high performance processor and high resolution A/D converter, weekly wave 32 point sampling, combined with special measurement CT, to ensure the high precision of remote measurement。
2.3 The protection function does not depend on the communication network at all, and the failure of the network does not affect the normal operation of the protection。
2.4 The device adopts a fully sealed design, coupled with well-designed anti-interference components, so that the anti-vibration ability, anti-electromagnetic interference ability has been greatly improved。
2.5 Designed with hardware and software dual watchdog function, so that the whole system has a high measurement accuracy and anti-interference ability。
2.6 Friendly man-machine interface, the device adopts the Chinese large-screen LCD display, trip report, alarm report, remote message, telemetry, set value setting, etc. are clearly marked in Chinese characters on the LCD, easy for users to use and master。
2.7 Communication mode using CAN port, that is, controller area network interface (or 485 interface)，Its characteristics are: simple structure，There are only two wires connected to the outside;Transmission speed up to 1Mbps;Transmission distance up to 10KM;CRC testing is adopted and error handling capability can be provided.Using non-destructive bus arbitration technology，The station communication has high efficiency and anti-interference ability。
3. Main technical data of troubleshooting device TC-3088
3.1 Rated data
a. Ac, DC power supply: 220V or 110V (instructions when ordering)
b. Ac voltage: phase voltage 220V, line voltage 380V
c. Ac current: 5A or 1A (instructions when ordering)
d. Frequency: 50Hz
3.2 Power consumption:
a. Dc circuit: ≤10W
b. 交流电压回路： < 0.5VA/ phase
c. 交流电流回路： < 1VA/相(IN =5A) 或 < 0.5VA/ phase (IN =1A)
3.3 Accurate working range:
a. 电流： 0.2In～1.4 In
b. Voltage: 10V-450V
c. Frequency: 45Hz to 55Hz
d. 时间： 0.00～99.99s
e. 有功功率： >10W
3.4 Troubleshooting device setting error:
a. 电流及电压定值误差： <±3％ 整定值
b. 时间定值误差： <±1％ 整定时间+35ms
3.5 Measurement error range
a. 频率： 0.1％
b. Current, voltage: 1%
c. Active power, reactive power: ± 5%
3.6 Remote event recording resolution: no more than 2mS
3.7 Remote control accuracy: not less than 99.99％
3.8 Insulation performance of the fault disconnecting device
a. Insulation resistance: between each conductive circuit of the device and the exposed non-charged metal part and the shell, as well as between different circuits that are electrically unconnected, the insulation resistance value is measured with an open circuit voltage of 500V test instrument, not less than 100MΩ。
b. Medium strength: power frequency test voltage of 2kV between the device power loop, AC loop, outlet loop and to the ground can withstand the power frequency test voltage of 1kV to the ground, lasting 1 minute, no insulation breakdown or flashover phenomenon。
c. Impulse voltage: The short-time impulse voltage test between the power supply circuit, AC circuit, exit circuit and the ground can withstand 5kV standard lightning waves, without insulation breakdown or flashover phenomenon。
3.9 Mechanical properties of the fault disconnecting device
a. The device can withstand the "ZB K45020-90 electric power system protection, automatic relay and device general technical conditions" stipulated in the severity of the level 1 vibration response, vibration durability test。
b. The device can withstand the "ZB K45020-90 electric power system protection, automatic relay and device general technical conditions" as specified in the severity of class 1 impact response, impact durability test。
c. The device can withstand the "ZB K45020-90 power system protection, automatic relay and device general technical conditions" stipulated in the severity of class 1 crash test。
3.10 Contact performance
The voltage is not greater than 250V, and the current is not greater than 0.5A DC inductive load circuit (τ = 5±0.75ms), the contact break capacity is 20W, or the voltage is not greater than 250V, the current is not greater than 0.5A AC circuit (cosψ = 0.4±0.1) The middle contact disconnect capacity is 50VA。The electrical life times is 100000 times。
3.11 Anti-interference performance of the fault disconnecting device
a. Ability to withstand high-frequency pulse interference
The device can withstand GB/T14598.Measurement of electrical interference tests for relays and protective devices - Part 1:1 MHZ pulse Group interference test for high frequency pulses of 1 MHZ and 100 KHZ, harsh class III。
b. Ability to withstand electrostatic discharge interference
The device can withstand GB/T14598.14-1998 Measurement of electrical interference tests for relays and protective devices - Part 2: Electrostatic discharge tests for electrostatic discharge interference with a voltage of 8kV and a severe class III。
c. Ability to withstand radiation and electromagnetic field interference
The device can withstand GB/T14598.9-1995 Electrical relays-Part 22 Tests for measuring the electrical interference of relays and protective devices Part 3: Radiation Electromagnetic Field Interference Tests for radiation electromagnetic field interference specified in the harsh class III。
d. Ability to withstand fast transient interference
The device can withstand GB/T14598.10-1996 Electrical relays - Part 22 - Measurement of electrical interference tests for relays and protective devices - Part IV: Rapid Transient Interference tests - Fast transient interference of the severity class III specified in this section。
e. Withstand auxiliary excitation interrupt interference ability
The device can withstand the auxiliary excitation interruption with a duration of 100ms specified in the "ZB K45 020-90 General Technical Conditions for Protection, automatic relays and Devices of Power Systems", and the device will not change its output state in an incorrect manner。
3.12 Environmental Conditions
a. Ambient temperature: Operating temperature: -15℃ ~ +65℃ Storage temperature: -25℃ ~ +70℃
b. Atmospheric pressure: 80 ~ 110kPa
c. Relative humidity: not more than 90%
4. Brief introduction of the main functions of the troubleshooting device TC-3088
TC-3088 fault disconnecting device, in the operation of the system, the device constantly monitors the bus voltage and measure the current, with abnormal current and voltage alarm function, and the other Settings are as follows:
(1) Overvoltage trip (optional backout)
(2) Single-phase low voltage trip (detected by the circuit breaker closing position, as a low voltage lock condition.)
(3) Over frequency tripping (through the circuit breaker closing position, and low voltage blocking, while the system frequency must be lower than the high frequency setting, can be put into this function.)
(4) Low frequency tripping (at the closing position of the circuit breaker, and low voltage blocking, while the system frequency must have been greater than the low frequency set value, can be put into this function.)
(5) Isolation protection discrimination.
(6) Optional reverse power quick break function.The current circuit of the grid-connected total incoming current transformer must be connected correctly.
(7) Current over line alarm (optional back)
(8) Simultaneous decompression of multiple switches (up to 4)
(9) Measurement and control functions: U, I, P, Q, cosΦ, F (requires measurement current and voltage input)
