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PRS-7789 smart terminal
The PRS-7789 smart terminal is a smart terminal device fully supporting digital substations. It provides digital interfaces for traditional circuit breakers and has the function of a local operation box. It can be used as an intelligent accessory for traditional circuit breakers. The PRS-7789 smart terminal receives the controlcommand from associated bay layer equipment through the optical fiber GOOSE network or point-to-point optical fiber connection, completes the operation of circuit breaker, and collects the relevant state signals of the circuit breaker and sends it to the bay layer equipment through the optical fiber.
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Scope of Application
It is applicable to circuit breakers and busbar disconnector inintelligent substations of various voltage levels.
Advantages
01
The device adopts the 4U entire layer, reinforced case, multi-layer shielding, strict separation of strong and weak currents and other anti-vibration and anti-interference designs, which has high anti-interference performance, and is suitable for installation in harsh environments.
02
The device adopts 64-bit high-performance CPU, internal high-speed bus and intelligent I/O, and both software and hardware have modularized design, which can provide flexible configuration and plug-and-play.
03
It supports the substation communication standard IEC61850, and the number of SV/GOOSE message receiving ports can be configured.
04
It can receive the GOOSE command of protection tripping and closing, manual closing/manual opening of measurement and control, as well as knife switch and grounding knife switch control, and output corresponding action contacts.
05
It can collect and upload the positions of switch, knife switch and grounding knife switch, and other signals through GOOSE communication.
06
The device can adapt to various tripping and closing action currents, which has the function of current self-retaining.
Technical Features
Specifications

Case dimensions

482.6mm×177.0mm×283.0mm(W×H×D)

Normal working temperature

-40℃～70℃

Extreme working temperature

-40℃～85℃

Storage and transportation

-40℃～85℃

Relative humidity

5%～95%

Atmospheric pressure

80kPa～106kPa

DC working power

220V / 110V, allowable deviation: -20％～+15％

Remote signal input

DC110V / DC220V, passive contact input, isolated by optocoupler

Power consumption of DC power circuit

Under normal operation, the power consumption of entire device is no more than 30W

Under tripping action, the power consumption of entire device is no more than 40W.

Tripping action time

The tripping action time is no more than 5ms

Input response time

The input response time (not including the anti-shake time) should be no more than 5ms.

Related solutions
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Intelligent Substation Solution (1000kV and Below)
Intelligent substation is an important part of the intelligent power grid, while the integrated monitoring system is the basis for dispatching control and production management in the intelligent power grid. The PRS-7000 monitoring system of CYG SUNRI meets the requirements of digital information of entire station, network-based communication platform and standard information sharing, and various functions have been realized, such as uniform access, storage and display of station information, operation monitoring, operation and control, comprehensive information analysis and intelligent alarm, operation management and auxiliary applications.