PCRED398026EN1.pdf

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Protection

and control

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Sepam range

Sepam 2000 SX

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Presentation

Contents

page

presentation

2

selection table

3

metering

4

protection

6

control and monitoring

7

functional and connection schemes

9

other connection schemes

11

examples of connection schemes

13

communication

14

characteristics

15

installation

16

ordering information

20

Sepam 2000 SX is used for incomer and feeder

protection and metering. Combined with the

communication option, it can provide remote control,

annunciation and metering.

Advantages

c indication of phase and earth fault values at the time of breaking provides

the operator with useful assistance in determining the causes and seriousness

of faults,

c the high level of electromagnetic compatibility (EMC) makes it possible to use

advanced digital technology-based functions in electrical substations,

without the need for any particular precautions,

c Sepam 2000 's continuous self-testing sets the device in a predetermined

fail-safe position whenever a failure occurs, thereby preventing random operation,

c terminals that are individually disconnectable while energized allow easy

maintenance,

c The optional communication function may be used for remote setting, remote

metering, remote indication and remote control by means of a two-wire link

with a remote control and monitoring system for centralized operation,

c setting and testing are extremely simple:

v the settings may be made on the front panel (serial link):

- one by one, using the TSM2001 pocket terminal, or the SFT2801 PC software

program,

- all at once using the SFT2821 PC software program (downloading),

v direct readout of primary current and voltage and simple testing of the metering

function by injection guarantee the coherency of all settings.

The wide setting ranges provide for the most widely varied cases.

Installation in the switchboard is simplified:

c just one device to install, the Sepam 2000 S26 (compact),

c cabling is limited to:

v standard 1A or 5A current transformers or linear CSP type sensors

(Rogowski coil principle),

v voltage transformers (SX2 version),

v actuators (trip and closing coils).

Sepam 2000 S26 compact.

Customization (1)

Standard control and monitoring carried out in Sepam 2000 's internal PLC

can be customized. Sepam 2000 SX does not allow for extension of the logic

inputs and outputs. For applications which require more logic inputs/outputs,

use Sepam 2000 type S01 or S02.

(1) Please refer to document Sepam 2000 customized

application.

2

Sepam 2000 SX

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Selection table

Sepam 2000 substation

functions

ANSI

Sepam types

code

SX1

SX2

protection

phase overcurrent

50/51

4

4

earth fault (sensitive E/F)

50N/51N(G)

4

4

metering

phase currents (I1, I2, I3)

c

c

peak demand phase currents (I1, I2, I3)

c

c

voltage (U21, U32, U13, V1, V2, V3)

c

real / reactive power (P, Q)

c

peak demand real / reactive power

c

power factor

c

fréquency

c

accumulated real / reactive energy ( ±

Wh, ±

VArh)

c

tripping currents (I1, I2, I3, Io)

c

c

true rms current

c

c

disturbance recording

c

c

residual current

c

c

residual voltage

c

cumulative breaking current

c

c

and number of breaks

control and monitoring (1)

open / close

c

c

lockout relay

86

c

c

inhibit closing

69

c

c

annunciation

30

c

c

logic discrimination

68

c

c

trip circuit supervision

74

c

c

detection of plugged connectors (DPC)

74

c

c

operation counter

c

c

phase fault trip counter

c

c

disturbance recording triggering

c

c

Sepam models

compact S26

LX

LT

The figures in the columns represent the number of similar protection devices.

For example, for phase overcurrent protection, “4” means: 4 separate overcurrent protection

devices.

(1) according to parameter setting.

3

Sepam 2000 SX

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Metering

Sepam 2000 is an accurate metering device.

It gives a direct readout of values,

together with the related units, A, V, W...

All the values needed for operation and used

for commissioning are available locally

and in the control room.

Measurements needed for operation

Currents

Measurement of the current for each of the 3 phases of the circuit.

Peak demand currents

Measurement of the greatest average current value on the 3 phases.

The average current measurement is computed periodically (adjustable period:

5, 10, 15, 30 or 60 minutes).

The “clear” button is pressed for zero reset.

Voltages (4)

Measurement of the circuit phase-to-phase and phase-to-neutral voltages.

Real / reactive power (4)

Measurement of the real and reactive power, with the sign, in balanced

and unbalanced 3-phase networks.

Peak demand real / reactive power (4)

Measurement of the greatest average real power (and reactive power) value,

used to find the power absorbed during peak load periods. The average value

is computed periodically (adjustable period: 5, 10, 15, 30 or 60 minutes).

The “clear” button is pressed for zero reset.

Power factor (p.f.) (4)

Measurement of the p.f., with the sign and type (capacitive or inductive),

of the power conveyed.

Measurements accessed on the front panel of Sepam 2000

(serial link and/or display) and via the communication system.

Frequency (4)

Measurement of frequency (based on positive sequence voltage or the U21 voltage

input).

Accumulated real / reactive energy (4)

The alphanumerical display unit shows the 4 accumulated real / reactive energy

values:

c real energy consumed,

c reverse real energy,

c reactive energy consumed,

c reverse reactive energy.

These values are saved in the event of a power failure.

Tripping currents

Measurements of the 3 phase currents and the residual current that were stored

at the time that Sepam 2000 gave the tripping order. Used to find

the fault current (fault analysis) and assess the level of wear of the breaker

(maintenance assistance). The "clear" button is pressed for zero reset.

True rms current

Measurement of the rms value of phase 1 current up to 4 In, taking into account:

c fundamental,

c harmonics up to rank 21 st .

Disturbance recording

Recording of electrical signals and logical information before and after

a disturbance recorder triggering order is given.

4

Sepam 2000 SX

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Measurements used

for commissioning

and maintenance

Characteristics

functions

ranges

accuracy (5)

ammeter (1)

0 to 24 In

0.5%

peak demand current (1)

0 to 24 In

0.5%

voltmeter (1)

0 to 1.5 Un

0.5%

Residual current / residual voltage

Used to check the current and voltage sensor

connections by giving the measurement of:

c the residual current used for the earth fault

protection function,

c the residual voltage used for the neutral voltage

displacement and the directional earth fault protection

functions.

wattmeter (1)

0 to 999 MW

1%

varmeter (1)

0 to 999 MVAr

1%

peak demand real power (1)

0 to 999 MW

1%

peak demand reactive power (1)

0 to 999 MVAr

1%

power factor (1) (3)

-1 to +1

0.01

frequency meter (1)

45 to 65 Hz

0.02 Hz

accumulated real energy (1)

0 to 280 x 10 6 MWh

1%

Cumulative breaking current

Used for breaking device maintenance.

accumulated reactive energy (1)

0 to 280 x 10 6 MVArh

1%

tripping currents (1)

phase

0 to 24 In

5%

earth

0 to 10 Ino

5%

true rms current

0 to 4 In

1%

up to harmonic 21

disturbance recording (5)

record

86 periods

12 samples

duration

per periods

time before

1 to 85 periods

triggering

event

residual current (7)

0 to 10 Ino

5%

residual voltage (7)

0 to 1.5 Un

5%

manque le 5 et 6

cumulative breaking current (7)

0 to 9999 (kA) 2

10%

number of breaks (7)

0 to 99999

(1) measurement accessed on the front panel of Sepam 2000 (display and serial link) and via

the communication system.

(2) measurement accessed on the front panel of Sepam 2000 (serial link).

(3) capacitive or inductive

(4) Sepam SX2.

(5) typical accuracy with nominal values according to IEC 60255-6.

(6) transfer of records to the front panel of Sepam 2000 using the SFT 2801 software program

and via Jbus/Modbus communication.

(7) measurement accessed on the front panel of Sepam 2000 (serial link) and via the

communication system.

Reminder:

Rated current In, rated voltage Un and current Ino are general parameters that are set at the

time of Sepam 2000 commissioning.

In is the current sensor rated current (CT rating).

Ino is the core balance CT current rating.

Un is the phase-to-phase voltage of the voltage sensor primary windings.

Example of the processing of a disturbance recording record

using the PC SFT 2826 software program.

5

Sepam 2000 SX

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