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g MID Protection System

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gIndustrial relays - MID System

� Microprocessor and analog based

relay system;

� Modular - Independent modules

mounted in:

� 1/2 rack (MID050) or ;

� 1 rack (MID100) of 19”.

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g MID System - Application

� Interconnection between utilities

and consumers;

� Isolated Small Power plants (5-10 MW);

� Co-Generation Power plants;

� Protection packages for:

� Generators;

� Motors;

� Transformers;

� Shunt capacitor banks.

MLJ MMC TCW TOV

MFF MGC MIC

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g

MFF ModuleMicroprocessor Frequency Relay

� MODELS

� MFF1000: 2 X 81;

� FEATURES

� Overfrequency & underfrequency;

� Overfrequency (2 steps);

� Underfrequency (2 steps);

� Definitive time delay operation with

acceleration of the second step.

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g Frequency relay - MFF (cont'd)

� Front display with 3 characters to:

show current values;

set the relay;

show information of the last trip;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g Frequency relay - MFF (cont'd)

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g

MID System - ModulesGenerator Protection - MGC

� MODELS

� MGC1000 (Functions: 46,49,51,51G);

� FEATURES

� Thermal image unit - 49;

� Negative sequence overcurrent unit - 46;

� Time delay (definite time)

three-phase overcurrent function - 51.

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g Generator Protection - MGC (cont’d)

� Time delay (definite time) single-

phase overcurrent function - 51G;

� Front display with 3 characters to:

show current values;

set the relay;

show information of the last trip;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g Generator Protection - MGC (cont’d)

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g

MID Systems - ModulesOvercurrent Module - MIC

� MODELS

� MIC5000 (Overcurrent single-phase

module 50/51);

� MIC7000 (Overcurrent three-phase

module 3 x 50/51);

� MIC8000 (Overcurrent three-phase &

ground 3 x 50/51 + 50N/51N);

� MIC9000 (Overcurrent two-phase &

ground 2 x 50/51 + 50N/51N).

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g Overcurrent Module-MIC (cont'd)

� FEATURES

� Inverse time delay

(inverse, very inverse & extremely

inverse selectable curves);

� Definite time delay

(also selectable);

� Instantaneous unit

(with time delay possibility).

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g Overcurrent Module-MIC (cont'd)

� Front display with 2 characters to:

show current values;

set the relay;

show information of the last trip;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g

Model MIC5000

External Connections

Overcurrent Module-MIC (cont'd)

Model MIC7000

External Connections

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g

Model MIC8000

External Connections

Overcurrent Module-MIC (cont'd)

Model MIC9000

External Connections

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g

MID System - ModulesSynchro Check relay -MLJ

� MODELS

� MLJ1000: Without communications;

� MLJ1005: WIth communications (RS485)

� FEATURES

� Programmable Synchronism Task;

� Programmable Line/Busbar Permission

(DLDB, DLLB, LLDB);

� Configurable Outputs;

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g Synchro Check relay - MLJ (cont'd)

� Real Time Monitoring of Line and Busbar

magnitudes:

� Line and busbar voltage amplitude;

� Line/busbar voltage phase difference;

� Line/busbar slip frequency;

� Recording of the last event;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g Synchro Check relay - MLJ (cont'd)

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g

MID System - ModulesMotor Protection - MMC

� MODELS

� MMC1000D (Functions: 37, 46, 49,

51, 51N, 51LR, 66)

� FEATURES

� Undercurrent protection - 37;

� Current unbalance or reversal - 46;

� Thermal image - 49;

� Phase Overcurrent - 51.

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gMotor Protection - MMC (cont'd)

� Ground Overcurrent - 51N

� Locked rotor - 51LR;

� Control of number of starts - 66.

(Relay does not allow more

starts than set for a given time

period).

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g Motor Protection - MMC (cont'd)

� Front display with 3 characters to:

show current values;

set the relay;

show information of the last trip;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g Motor Protection - MMC (cont'd)

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g

MID Systems - ModulesPower Reverse module - TCW

� MODELS:

� TCW500DA (Single-phase unit);

� FEATURES:

� Setting range 1% - 40% of In ;

� Definite time delay unit

(100 msec - 10 seconds);

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc /110-220 Vac.

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g Power Reverse module - TCW

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g

MID System - ModulesVoltage module model - TOV

� MODELS

� TOV5000B

Under or Overvoltage single-phase unit 27/ 59.

3rd harmonic filter available.

� TOV4000I

Undervoltage three-phase unit - 27.

� TOV4000M

Overvoltage three-phase unit - 59.

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g Voltage module TOV (cont'd)

� FEATURES

� Definite time delay operation;

� Time delay and instantaneous units;

� Setting ranges:

3/66 V, 20/275 V or 50/305 V in the

single-phase units and 20/275 V or

50/305 V in the three-phase units;

� Auxiliary DC voltages:

24-48 Vdc/Vac, 48-125 Vdc/Vac,

110-240 Vdc / 110-220 Vca.

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g Voltage module TOV (cont'd)

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g Voltage module TOV (cont'd)

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g