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.

Masterpact MTZ Signalling Accessories Location
Cradle Position Switches (CE, CD, and CT)	Combined Connected/Closed Contacts (EF)	ON/OFF Indication Contacts (OF)	Ready-to-Close Contacts (PF)t
		Mechanical Operation Counter (CDM)	M2C Programmable Contacts or ERMS Switch Module (ESM)
		Overcurrent Trip Indication Contacts (SDE)	M2C Programmable Contacts or ERMS Switch Module (ESM)

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
Rated voltage	Vdc	30 V / 3 A
Max breaking voltage	Vac	277 V / 3 A
Max load breaking capacity	Vac	277 V / 3 A
Max load breaking capacity	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
Rated voltage	Vdc	30 V / 3 A	24 V
Max breaking voltage	Vac	277 V / 3 A	—
Max load breaking capacity	Vac	277 V / 3 A	—
Max load breaking capacity	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
Breaking Capacity at a Power Factor (p.f.) of 0.3*	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.