What is NSD570?

NSD570 connectivity NSD570 is designed for the transmission of protection commands over all kinds of communication media, like copper wires, optical fibers, analog and digital channels of optical networks and microwave radio links, as well as Ethernet/IP based telecommunication networks.

What is Teleprotection system?

Teleprotection is a protection system in charge of monitoring the condition of the grid, isolating faults and preventing damage to critical parts of the power grid.

What is Digital Protection coupler?

1.0 Digital protection coupler for protection signalling through optical fibre cable system. 1.1 The Digital protection signalling equipment is required to transfer the trip commands from one end of the line to the other end in the shortest possible time with adequate security and dependability.

What is direct tripping?

Direct Transfer Trips (DTT) are initiated from station relays when a severe event occurs in the substation. Some of these events are breaker failure, bus faults, transformer failure, etc. For example, a ring bus substation or a breaker-and-a-half substation has a breaker failure lockout assigned to each breaker.

What is protection coupler?

Digital protection coupler for protection signalling through optical fibre cable system. The Digital protection signalling equipment is required to transfer the trip commands from one end of the line to the other end in the shortest possible time with adequate security and dependability.

What is direct transfer trip?

Direct Transfer Trip. • Direct transfer trip (DTT) communicates a trip signal. to a remote location. – Example: substation relay detects fault on feeder. – Trip signal communicated to DG location.

What is permissive tripping?

Permissive Overreach Transfer Trip (POTT) In a POTT scheme, when the relays on both terminals detect a fault on their overreach protected zone (Zone 2), they send a permissive signal to the remote terminal. This signal is compared with the internal overreaching function, Zone 2, to trip the breaker.

What is the trip system?

The purpose of an alarm system is to bring a malfunction to the attention of operators and maintenance personnel, whereas the purpose of a trip system is to shut down a system in an orderly fashion when a malfunction occurs, or to switch failed units over to standby units.

What is Intertrip protection?

The term ‘intertripping’ may be defined as a method in which operation of a protection equipment at one end of a circuit causes a signal to be transmitted to trip a circuit breaker at the remote end of the circuit.

What is a DCB scheme?

Description. A Directional Comparison Blocking (DCB) communication assisted protection scheme is used primarily to protect transmission circuits and provides high speed tripping for all faults (phase and ground) occurring on the circuit it is designed to protect.

What is a shunt trip?

A shunt trip device is an optional accessory in a circuit breaker that mechanically trips the breaker when power is applied to the shunt trip terminals. The power for the shunt trip does not come from within the breaker, so it must be supplied from an external source.

What is the purpose of the nsd570 system?

NSD570 – fast, reliable and secure transmission of protection signals A secure and uninterrupted supply of electricity is only possible with the help of comprehensive protection and control functions, which ensure the reliable operation of the power system. As the…

How can I connect my nsd570 to the Internet?

In a substation, several NSD570 can be connected to a local station bus (RS-485). Connection to the Intranet/ Internet is provided by a single Management interface. In such a network, all NSD570s are accessible with a unique device address.

Is the nsd570 compatible with IEC 61850?

NSD570 supports IEC 61850 as well as conventional contact type interface thus allowing the exchange of GOOSE messages between traditional and IEC 61850 enabled substations. NSD570 offers a complete set of line interfaces to the various communication channels for teleprotection.

Do you need NMs for nsd570 substations?

Local alarm polling in a substation and polling the alarms of an entire NSD570 network in several substations is standard function of the HMI570, an extra Network Management System (NMS) is therefore not required.