词汇表

術語和縮寫的說明。

ABR – Automatic Backfeed Restoration.

This function generates an automatic close of the recloser if supply is applied to one side of normally open recloser and another side of recloser has no voltage.

BR Automatic Backfeed Restoration.

ACR - Automatic Circuit Recloser

An Automatic Circuit Recloser is a circuit breaker incorporating a multishot, autoclosing relay, installed on a medium voltage feeder. They are designed to trip when a fault is detected, then automatically reclose after a set amount of time in an attempt to clear transient faults on the feeder. They can save considerable time when restoring power.

ACR Automatic Circuit Recloser

Bus bar (busbar)

An electrically conductive bar connecting two or more electrical circuits.

Bus bar electrical circuit

CT - Current Transformer

Current Transformers are used to measure current for protection and measurement in switchgear applications.

CT Current Transformer switchgear applications protection measurement

DCE

Data Communication Equipment

Data Communication Equipment

Dielectric

An insulating medium between conductors

Dielectric conductors

DNP3 - Distributed Network Protocol 3

DNP3 is a communications protocol used for SCADA communications.NOJA Power's range of OSM reclosers are supplied with the DNP3 protocol as standard.

DNP3 Distributed Network Protocol SCADA NOJA Power's range OSM reclosers

DSA - Distribution System Automation

DSA Distribution System Automation

ITS - Interface Test Set

The Interface Test Set simulates the current and voltage signals generated by sensors inside the OSM recloser bushings for system testing purposes. It is used to perform tests such as three phase short circuit, phase to phase short circuit, earth fault, upstream broken wire, low source voltage and loss of supply.

ITS Interface Test Set

MCC - Motor Control Centre

A modular cabinet system for powering and controlling motors in a mine or factory.

MCC Motor Control Centre

Modbus

Modbus is a communications protocol used for automation applications. It is often used in SCADA systems especially in substation automation. NOJA Power's range of OSM reclosers are supplied with the Modbus protocol as standard.

Modbus SCADA systems OSM reclosers

MPM - Main Processing Module

MPM Main Processing Module

OSM - Outdoor Switch Module

The Outdoor Switch Module is an outdoor, pole-mounted, medium voltage recloser. It features full-directional protection, current and voltage measurement on all six bushings, no SF6 or oil insulants and is light weight. Full SCADA and communications features are standard along with programmable digital I/O.

OSM Outdoor Switch Module SCADA digital I/O SF6 medium voltage recloser

Recloser

A recloser is a circuit breaker incorporating a multishot, autoclosing relay, installed on a medium voltage feeder. They are designed to trip when a fault is detected, then automatically reclose after a set amount of time in an attempt to clear transient faults on the feeder. They can save considerable time when restoring power.

To read more go to our Recloser product page

Recloser

Rogowski Sensor

A Rogowski sensor is an air-cored CT design made out of a helix coil. They are immune to core saturation at high fault currents, produce safe voltages (millivolts) have an increased accuracy over a wider range and are very lightweight. NOJA Power use Rogowski coils for phase and earth current measurement in the OSM recloser.

Rogowski Sensor air-cored CT design OSM recloser earth current measurement

RTU - Remote Terminal Unit

Remote control and monitoring unit used in SCADA systems.

RTU SCADA systems

SCADA - Supervisory Control And Data Acquisition

SCADA systems are used to monitor and control a population of remote devices from a central control room. A communications protocol is required to receive and transmit alarms and other data. NOJA Power reclosers are SCADA ready with RS485, RS232 ports and protocols such as DNP3 and Modbus.

SCADA DNP3 Modbus remote devices RS485, RS232

SEF - Sensitive Earth Fault

Sensitive Earth Fault is a form of Earth Fault protection capable of detecting low fault currents. The OSM recloser can detect SEF from 4 - 80A.

SEF protection

SF6 - Sulfur hexafluoride

Colourless, odourless gas used to insulate electrical switchgear. Identified by the KYOTO protocol as one of the 6 greenhouse gasses. SF6 gas has a an environmental impact 24000 times CO2 (Carbon Dioxide) and has an atmospheric lifetime of up to 3200 years

SF6 greenhouse gasses 3200

TELUS

TELUS is a software package that allows easy configuration of an OSM recloser via an RS232 connection. It features a graphical protection curve tool, I/O mapping tool, SCADA protocol configuration and can be used to change every setting inside the control cubicle. TELUS is also used to transfer event data from the recloser to a pc for off-line analysis of faults, load profiles, events and other recorded Information.

TELUS SCADA protocol recloser