Intelligent Measurement Control Device for Transformer for Photovoltaic Wind Power Booster Stations With Remote

1

telemetry

① AC measurement: standard 6-way current, 6-way voltage, three-phase current, three-phase voltage, active power, reactive power, power factor, and system frequency on each side.

② DC measurement: 4-channel 4-20mA and 2-channel PT100 as standard.

③It can be expanded to 9-channel current and 9-channel voltage acquisition, which needs to be specified when ordering.

2

remote message

① 27-channel remote signals are standardly configured, and the remote signal power supply is external AC/DC220V.

② The 27-channel remote signals can be configured with the definition of remote signal names according to the actual wiring.

③ The remote signal can be expanded to 54 channels, which needs to be specified when ordering.

3

Open

① The standard output is 8-way, which can realize remote control of switch opening and closing and protection tripping.

② 1-way operation box is optional, please specify when ordering.

4

Protect

Function

① Transformer differential quick-break, ratio differential, and differential current alarm.

② Switch protection on each side: three-stage overcurrent, overload, overcurrent inverse time, negative sequence overcurrent, zero sequence overcurrent, zero current inverse time, overvoltage protection, and low voltage protection.

③ Alarms of switches on each side: PT disconnection alarm, CT disconnection alarm.

④ The non-interrupting current on the high-voltage side locks the circuit breaker.

5

Fault

Wave recording

① The fault recording file follows the format defined by Comtrade1999 standard .

② The fault recording file contains the current , voltage and switch position of the switches on each side .

③ One fault generates two waveforms: fault triggering moment and fault exit moment.

6

No

electricity

quantity

① Non-electrical quantities of the transformer body: light gas, heavy gas, pressure release, high temperature, ultra-high temperature, low oil level, high oil level, etc.

② Other non-electrical quantities: including network door tripping, door opening protection, etc.

③ 3 independent non-electrical protections are reserved, with alarm/tripping selectable.

7

temperature

Over limit

① The device has the functions of over-temperature alarm and over-temperature trip.

② The DC channels for over-temperature alarm and over-limit tripping can be flexibly configured.

8

event

Record

① 200 SOE records. If there are more than 200 records, they will be covered in a first-in-first-out manner.

② 40 fault records (telemetry section data when the fault occurred).

③ 30 sets of fault recording file records (recording file reports when faults occur).

9

communication

manage

① Standard 6-way RS485 serial port, access protocol supports MODBUS, IEC103, IEC101, DL/T645 electric energy meter and other protocols.

② The RS485 serial port can be expanded to 10 channels, which needs to be specified when ordering.

③ 2 RJ45 network ports, which can realize IEC103 protocol, IEC104 protocol access and IEC104 protocol forwarding.

10

Networking

Function

① Built-in ring network switch, 2 optical ports, can form a self-healing fiber optic ring network.

② The ring network switch has two RJ45 electrical ports to enable direct networking and data transmission of other external devices.

11

Time

① The default is master station protocol synchronization.

Working power supply

Power Input

AC/DC110-220V

frequency

50Hz

Power consumption

Normal operation ≤10W, device operation ≤15W

Current input

Rated valueIn

Standard 5A (1A must be specified when ordering)

Measuring range

0.03In～20In

Measurement error

≤±0.5%

Power consumption

≤0.5VA/phase

Voltage input

Rated valueUn

100V/270V/690V/800V

(When using 1140V, an external PT is required to reduce the voltage)

Measuring range

0.02Un～1.2Un

Measurement error

≤±0.5%

Power consumption

≤0.5VA/phase

Power Error

Active/reactive power

≤±1.0%

Power Factor

≤±1.0%

Frequency measurement

Measuring range

45-55Hz

Frequency Error

≤±0.02Hz

Switch input

Remote signal power supply

AC/DC220V (external)

Isolation method

Photoelectric isolation, isolation voltage 2500V

Opening control

Issue quantity

8-way

Node capacity

AC250V/10A, DC30V/10A

Output method

empty contact