SAI3880D series digital generator protection device with high performance chip supports universal hardware platform, easy to maintain; the Ethernet communication, high-speed data transmission and reliable. Complete localization of Chinese display technology, simple operation.

Based on waterproof, dust, anti vibration design, can be run in a variety of field conditions.

Suitable for capacity of 50MW and below the fire and hydro generator protection.

1.2 main features of the device

An Motorola 32 bit microcontroller technology, the stability and speed of products is guaranteed

The protection. The 14 bit a / D converter, optional measurement module dedicated to the A / D conversion accuracy is up to 24 bits and the measurement indicators easily reach

The purpose of configuration with high capacity RAM and Flash Memory, can record 8 to 50 recorded reports, record the number of events is not less than 1000

An independent tuning of 32 sets of protection setting value, safe and convenient switch

In high precision clock chip, and equipped with GPS hardware circuit for the whole time, system clock synchronization

It is equipped with high speed Ethernet communication interface, and the integration of IEC870-5-103 standard communication protocol

In the electrical design with the machine, no adjustable device

In high grade, quality assurance component selection

An excellent anti-interference performance, panel or installed in the switch cabinet without other anti-jamming module

The purpose of self diagnosis function perfect

The chassis design of waterproof and dustproof and anti vibration.

The purpose of debugging conceptual design

1.3 function configurationFunction configuration of SAI3880D digital generator differential protection deviceDifferential quick break, ratio brake differential, CT disconnection locking differential, CT disconnection alarm, stator overvoltage protection, stator ground fault protection, overload alarm, anti time overcurrent protectionFunction configuration of backup protection device for SAI3881D digital generatorTransverse differential protection, loss of excitation protection, rotor one point grounding protection, rotor two points grounding protection composite voltage over current protection, inverse time negative sequence overcurrent protection, Pt disconnection alarm, non electricity protection (generator water shutoff, and the generator thermal, generator excitation accident, main steam valve closed),

Function configuration of SAI918 digital measurement and control device

AC measurement

A group of three-phase current, three-phase voltage and zero sequence voltage, power, frequency, power, power factor

Switch input

11 way switch input, can be the whole set of non electric power for "trip" or "alarm", the first 4 non electricity can be arbitrarily set trip exit

Switch output

8 way switch contact output, the 4 switch jump closing control

control loop

Jump control circuit, circuit breaker hand jump, hand closing operation and hop position indication

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