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SME2-IS - Manual - 06 - 2021

INTRODUCTION

Ambient conditions

The device must be used in the environmental conditions indicated in the technical specications.

Use in other conditions requires that the device be adapted appropriately prior to commissioning

(conditioning systems, humidity control, etc.).

Appropriate filters must be installed when the device is to be used in polluted conditions (dust, cor-

rosive substances, etc.).

Symbols

The manual employs the standard CEI/IEC and ANSI symbols when available:

for example: 51 = ANSI time overcurrent relay code

This manual uses the following typographical formats:

The headings of Thyvisor

[1]

menus are highlighted as shown:

Overcurrent - 50/51

The descriptions of parameters (measurements, thresholds, delays, etc.) and their values are high-

lighted as follows:

Threshold I>

Time-independent

I>def

MMI display messages are highlighted with the following font:

SPR10

Notes are highlighted with cursive script on a coloured background

Note: Note considered of value to the description

Abbreviations/deﬁnitions

Nominal residual current of the relay

Enp

Nominal residual CT primary current

Nominal phase current of the relay

Nominal CT primary phase current

25 ANSI synchrocheck relay code

27-59 ANSI undervoltage/overvoltage relay code

32P ANSI directional power code

47 Phase sequence control

50/51 ANSI overcurrent relay code

50N/51N ANSI neutral overcurrent relay code

67 ANSI directional overcurrent relay code

67 ANSI neutral directional overcurrent code

79 ANSI auto reclose code

52 or CB Circuit breaker

52a Auxiliary contact, assignable to a digital input, used to determine the

circuit breaker position for diagnostics and in case of failure to open.

The state of the contact corresponds to the circuit breaker position

(52a open = CB open)

52b Auxiliary circuit breaker contact (see 52a). The state of the contact

is opposite to the circuit breaker position (52b open = CB closed)

DFR Digital Fault Recorder (oscilloscope)

SER Sequential Event Recorder

SFR Sequential Fault Recorder

ANSI American National Standards Institute

IEEE Institute of Electrical and Electronics Engineers

IEC International Electrotechnical Commission

FSL Automatic faulty branch selection function

BLIND temporary opening inhibition signals (IEC61850)

FSL1 BLIND wait always active

FSL2 BLIND wait for rst fault occurrence only

FRT Automatic faulty branch selection function (without BLIND)

K1...K5 Output relays

PULSE Output relay programmed with a pulse output

tTR Minimum hold time with output relays tripped

CT Current transformer

P1 IEC terminology indicating the polarity of the CT primary (as an alter-

native to the ANSI dot symbol)

P2 IEC terminology indicating the polarity of the CT primary (as an alter-

native to the terminal not marked with the ANSI dot symbol)

S1 IEC terminology indicating the polarity of the CT secondary (as an

alternative to the ANSI dot symbol)

Note 1 For the detailed description of the graphic interface and use of the Thyvisor software, refer to the respective chapter

Brand	Thytronic
Model	SME2-IS
Category	Security Sensors
Language	English

Thytronic SME2-IS User Manual

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Thytronic SME2-IS Specifications