Siemens EF 73E Series Manual do Utilizador descarregar pdf (Página 5)

60CTS CT Supervision

The relay monitors each phase current input and operates

if any one or two inputs fall below the setting. The

element types have user operate and delay settings.

64H Restricted Earth Fault

The measured earth fault input may be used in a 64H

high impedance restricted earth fault scheme to provide

sensitive high speed unit protection. A calculation is

required to determine the values of the external series

stabilising resistor and non-linear shunt resistor which

can be ordered separately.

74T/CCS Trip & Close Circuit Supervision

The trip or close circuit(s) can be monitored via binary

inputs. Trip circuit failure raises an HMI alarm and

output(s).

Programmable Logic

The user can map binary inputs, protection elements,

LEDs and binary outputs together in a logical scheme.

Up to 4 logic equations can be defined using standard

logic functions e.g. Timers, AND/OR gates, Inverters and

Counters to provide the user required functionality.

Each logic equation output can be used for alarm &

indication and/or tripping.

Virtual Inputs/Outputs

There are 8 virtual inputs/outputs to provide internal

logical states to assist in the application of the functions.

Each virtual I/O can be assigned in the same way as a

physical I/O.

Circuit Breaker Maintenance

Two circuit breaker operations counters are provided to

assist with maintenance scheduling. The maintenance

counter records the overall number of operations and the

delta counter records the number of operations since the

last reset.

An I

t summation counter provides a measure of the

contact wear indicating the total energy interrupted by

the circuit breaker contacts.

Each counter has a user set target operations count

which, when reached, can be mapped to raise alarms/

binary outputs.

Sequence of event records

Up to 1000 events are stored and time tagged to 1ms

resolution.

Fault Records

The last 10 fault records are displayed on the relay fascia

and are also available through the communication

interface, with time and date of trip, measured quantities

and type of fault.

Waveform recorder

The waveform recorder stores analogue data for all poles

and the states of protection functions, binary inputs, LEDs

and binary outputs with user settable pre & post trigger

data. A record can be triggered from protection function,

binary input or via data communications. 10 records of 1

second duration are stored.

Real Time Clock

The time and date can be set and are maintained while

the relay is de-energised by a back up storage capacitor.

The time can be synchronized from a binary input pulse

or the data communication channel.

Serial Communications

The relay offers a USB serial port as standard on the front

of all units. All of the relays functions can be set on a PC

using Reydisp Evolution via the USB port. The connection

is made with a USB cable and operates with a ‘plug and

play’ connection, so no pre-setting of the relay is

required.

The front port can be switched off or set to use either the

DNP3.0, MODBUS-RTU, IEC60870-5-103 and ASCII

protocols for testing purposes.

A rear RS485 electrical connection is available on all units

for system interface connections. An internal terminating

resistor is provided, which can be connected into the

circuit by adding a wire loop between the relevant

terminals.

Fig 4. Typical RS485 connection

The rear RS485 can be user selected to be OFF, IEC60870-

5-103, MODBUS RTU or DNP3.0 protocol.

Data Acquisition -

Via Communication Interface

Siemens Protection Devices Limited 5

1 2 3 4 5 6 7 8 9 10 ... 15 16

Comentários a estes Manuais

Sem comentários

Siemens EF 73E Series Manual do Utilizador Página 5

Comentários a estes Manuais

Manuais e produtos relacionados com Fogões Siemens EF 73E Series