0614CT1701

Masterpact MTZ Signalling Accessories

Signalling accessories provide status indications for both the device and the cradle. Combinations of contacts are possible depending on the application requirements.

  • Open/closed position of the circuit breaker main poles (OF).

  • Overcurrent trip of the circuit breaker (SDE).

  • Combined connected/closed position of the circuit breaker (EF) (MTZ2/MTZ3 only).

  • Connected, disconnected and test positions of the cradle (CE, CD, CT).

  • Threshold overruns or status change through the programmable contacts (M2C).

  • Indication that the Energy Reducing Maintenance Settings (ERMS) is engaged through the ERMS switch module (ESM).

  • Ready-to-close contact (PF).

  • Mechanical operation counter (CDM).

OF, EF, CE, CD, CT, SDE and PF are available:

  • In the standard version for relay applications.

  • In a low level version that will perform better with PLC's with low level signals.

ON/OFF Indication Contacts (OF)

Microswitch Type ON/OFF Indication Contacts (OF) (MTZ1)

Rotary Type ON/OFF Indication Contacts (OF) (MTZ2 and MTZ3)

Two types of contacts indicate the ON and OFF position of the circuit breaker:

  • Microswitch-type changeover contacts in standard or low level versions for Masterpact MTZ1 circuit breakers.

  • Rotary-type changeover contacts for Masterpact MTZ2/MTZ3 circuit breakers. They are driven directly by a mechanism and switch when the minimum isolation distance between the main poles of the circuit breaker is reached.

  • Four OF contacts are provided in the basic configuration for all Masterpact circuit breakers.

  • For MTZ1, no additional OF contacts can be added. However, low-level OF contacts can replace the standard OF contacts. A mix of low-level contacts and standard contacts is possible.

  • For MTZ2/3, the rotary-type changeover contacts can be used in both standard and low-level versions. In addition to the four OF contacts provided for the basic configuration, two optional blocks of four contacts can be added on the circuit breaker, giving twelve OF contacts maximum.

    NOTE: When an EIFE is installed it takes up two OF positions, reducing the maximum number of OF contacts to ten.

ON/OFF Indication Contacts OF

Circuit Breaker Type

MTZ1

MTZ2/3

Supplied as Standard (Form C)

4

4

Maximum Number of Contacts

4

12

Breaking Capacity at a Power Factor (p.f.) of 0.3

Standard (100 mA/24 V minimum load)

Vac

240/380

6 A

10 A

480

6 A

10 A

600/690

6 A

6 A

Vdc

24/48

2.5 A

10 A

240

0.5 A

10 A

380

0.3 A

3 A

Low-Level (1 mA/4 V minimum load with a maximum current and voltage of 100 mA/10 V.

Note: If the maximum voltage and current is exceeded, the low-level function of the switch will be lost but the switch will continue to function as a standard switch with the following specifications.

Vac

24/48

5 A

6 A

240

5 A

6 A

380

5 A

3 A

Vdc

24/48

5/2.5 A

6 A

125

0.5 A

6 A

250

0.3 A

3 A

Overcurrent Trip Indication Contacts (SDE)

Additional Overcurrent Trip Indication Contacts (SDE)

Circuit breaker tripping following a fault is signalled by:

  • Local indication given by a blue mechanical fault indicator (reset).

  • Remote indication given by a changeover contact SDE.

Following tripping, the mechanical indicator must be reset before the circuit breaker can be closed. One standard SDE (SDE1) is supplied in the basic circuit breaker. An optional second SDE (SDE2, standard or low level) can be added.

NOTE: SDE2 is incompatible with the electrical reset after overcurrent trip option (RES), see Electrical Reset After Overcurrent Trip (RES) .

Overcurrent Trip Indication Contacts SDE

Supplied as Standard

1a/1b Form C

Maximum Number of Contacts

2

Breaking Capacity at a Power Factor (p.f.) of 0.3

Standard (100 mA/24 V minimum load)

Vac

240/380

5 A

480

5 A

600/690

5 A

Vdc

24/48

3 A

240

0.3 A

380

0.15 A

Low-Level (2 mA/15 V Minimum Load)

Vac

24/48

3 A

240

3 A

380

3 A

Vdc

24/48

3 A

125

0.3 A

250

0.15 A

Combined Connected/Closed Contacts (EF)

Combined Contacts

The contact combines the device connected and closed information to produce the circuit closed information.

NOTE: Ordering of additional OF contacts is required if EF is selected.

Connected/Closed Contacts EF (MTZ2/MTZ3 only)

Maximum Number of Contacts

8a/8b Form C

Breaking Capacity at a Power Factor (p.f.) of 0.3

Standard (100 mA/24 V minimum load)

Vac

240/380

6 A

480

6 A

600/690

6 A

Vdc

24/48

2.5 A

125

0.8 A

250

0.3 A

Low-Level (2 mA/15 V Minimum Load)

Vac

24/48

5 A

240

5 A

380

5 A

Vdc

24/48

2.5 A

125

0.8 A

250

0.3 A

Cradle Position Switches (CE, CD, and CT)

Connected / Disconnected / Test Position
Cradle Switches
(CE, CD and CT)

Three series of optional auxiliary switches are available for the cradle, both in standard and low level options:

  • Cradle position switches to indicate the connected position (CE).

  • Cradle position switches to indicate the disconnected position (CD). This position is indicated when the required clearance for isolation of the power and auxiliary circuits is reached.

  • Cradle position switches to indicate the test position (CT). In this position, the power circuits are disconnected and the auxiliary circuits are connected

Cradle Position Switches

 

MTZ1

MTZ2, MTZ3

CE

CD

CT

CE

CD

CT

Maximum Push-In Switches with Standard Actuators

3

2

1

3

3

3

With Additional Actuators

9

0

0

6

3

0

3

6

0

6

0

3

Breaking Capacity at a Power Factor (p.f.) of 0.3

Standard (100 mA/24 V minimum load)

Vac

240

8 A

380

8 A

480

8 A

600/690

6 A

Vdc

24/48

2.5 A

125

0.8 A

250

0.3 A

Standard (100 mA/24 V minimum load)

Vac

24/48

5 A

240

5 A

380

5 A

Vdc

24/48

2.5 A

125

0.8 A

250

0.3 A

Cradle Switch Block Position—Push-In Connectors

MTZ1 Push-In Connector Cradle Switch Block Position

MTZ1 Cradle Switch Block Position

As shown above, the cradle switches can be installed in 6 positions: 1, 2, 19, 20, 21 and 22. Each position corresponds to a particular type of auxiliary contact (CE, CD, CT).

When an EIFE is installed, the CD, CE, CT switches are directly connected to EIFE which makes the information available through the Ethernet communication bus.

MTZ1 EIFE Information

Position

Without EIFE

With EIFE

1

None or 1 CE

None or 1 CE

2

None or 1 CE

None or 1 CE

19

None or 1 CD

None

20

None or 1 CD

None

21

None or 1 CE

None

22

None or 1 CT

None

NOTE: Any standard contact can be replaced by a low-level contact except for the ones provided by EIFE.

MTZ2/MTZ3 Push-In Connector Cradle Switch Block Position

MTZ2 or MTZ3 Cradle Switch Block Position

As shown above, the cradle switches can be installed in three blocks:

  • Position 1, 2, 3 for the first block.

  • Position 12, 13, 14 for the second block.

  • Position 32, 33, 34 for the third block.

  • Blue boxes indicate options available when EIFE is ordered.

As standard, the first block can be installed with CD (three maximum), the second block can be installed with CE (three maximum), and the third block can be installed with CT (three maximum).

Changing the functions of cradle switches is possible. To make the change, the first block can be replaced by CE, the second block can be replaced by CT and the third block can be replaced by CE or CD.

Mixing of CE, CD, CT in one block is not possible. For example, installing 1CD and 2CE in the first block is not possible.

When EIFE is installed, it takes the place of CT, CE and CD switches at positions 32, 33 and 34.

The CD, CE, CT switches are directly connected to EIFE which makes the information available through the Ethernet communication bus. As EIFE also takes up positions 30 and 31, OF cannot be installed at these positions and the maximum number of OF contacts is limited to ten.

Masterpact MTZ2 and MTZ3 EIFE Information

Position

Without EIFE

With EIFE

1: 1, 2, 3

None
or 1CD or 2CD or 3CD
or 1CE or 2CE or 3CE

None
or 1CD or 2CD or 3CD
or 1CE or 2CE or 3CE

2: 12, 13, 14

None
or 1CE or 2CE or 3CE
or 1CT or 2CT or 3CT

None
or 1CE or 2CE or 3CE
or 1CT or 2CT or 3CT

3: 32, 33, 34

None
or 1CT or 2CT or 3CT
or 1CE or 2CE or 3CE
or 1CD or 2CD or 3CD

None

NOTE: Any standard contact can be replaced by a low level contact except for the ones provided by EIFE.

Cradle Switch Block Position—Ring Terminal Connectors

MTZ2 or MTZ3 Cradle Switch Block Position

As shown above, the cradle switches can be installed in three blocks:

  • Positions 1, 2, and 3 are available for CD switches.

  • Position 12 is available for the CT switch option.

  • Position 21 is available for the CE switch option.

  • Blue boxes indicate options available when the EIFE is ordered.

When EIFE is installed, it takes the place of the CE switches at positions 32, 33, and 34.

The CD, CE, CT switches are directly connected to EIFE which makes the information available through the Ethernet communication bus.

M2C Programmable Contacts

M2C programmable contacts: circuit breaker internal relay with two contacts

The M2C optional module (two contacts) can be used to signal threshold overruns or status changes. The assignment of the two contacts can be configured by using Ecoreach software. The M2C optional module requires the Micrologic X control unit to be supplied by an external 24 Vdc power supply. When the M2C module is installed, the ESM hardware module cannot be installed.

M2C Programmable Contacts Characteristics MTZ1, MTZ2, MTZ3

M2C

MTZ1, MTZ2, MTZ3

Output

Rated voltage

Vac

250 V / 3 A

Vdc

30 V / 3 A

Max breaking voltage

Vac

277 V / 3 A

Max load breaking capacity

Vac

277 V / 3 A

Vdc

30 V / 3 A

Minimum load

Vdc

5 V / 10 mA

ERMS Switch Module (ESM)

ERMS switch module (ESM)

The ESM hardware module is required to use the external lockable selector switch to engage/disengage the Energy Reducing Maintenance Setting (ERMS) function. It is equipped with one input dedicated to the ERMS selector switch and one output to activate an external pilot light when the ERMS is engaged.

The ESM hardware module requires the Micrologic X control unit to be supplied by an external 24 Vdc power supply. When the ESM hardware module is installed, the M2C optional module’s two contacts cannot be installed. In such applications, it is recommended to use an IO module for programmable contact functions.

The ESM module comes standard with the initial order of an ERMS digital module.

ESM

MTZ1, MTZ2, MTZ3

Output

Input

Rated voltage

Vac

250 V / 3 A

24–110 V

Vdc

30 V / 3 A

24 V

Max breaking voltage

Vac

277 V / 3 A

Max load breaking capacity

Vac

277 V / 3 A

Vdc

30 V / 3 A

Minimum load

Vdc

5 V / 10 mA

Ready-to-Close Contacts (PF)

Ready-to-close contacts (PF)

The ready-to-close position switch indicates that the following conditions are met and the circuit breaker can be closed:

  • The circuit breaker is open.

  • The closing springs are charged.

  • There is no standing closing or opening order.

Ready-to-Close Contacts Characteristics

Maximum Number

1

Breaking Capacity at a Power Factor (p.f.) of 0.3*

Standard
Minimum load:
100 mA/24 V

240 Vac

5 A

Low-level
Minimum load:
2 mA/15 V

240 Vac

3 A

Mechanical Operation Counter (CDM)

Mechanical operation counter (CDM)

The mechanical operation counter registers the number of operating cycles and is visible on the front of the device. It is compatible with manual and electrical control functions.

This option is required for source-changeover systems.

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