Masterpact MTZ Controlling Accessories

Control accessories provide multiple ways of controlling the circuit breaker and the possibility for remote operation. Two control devices are presented here:

Remote On/Off
Remote reset after overcurrent tripping

Masterpact MTZ Controlling Accessories Locations (MTZ2 Drawout Example)
	Automatic Reset After Overcurrent Trip (RAR)	Electrical Closing Pushbutton (BPFE)
	Electrical Reset After Overcurrent Trip (RES)	Spring Charging Motor (MCH)
	Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Diagnostic and Communicating Coils Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Basic Coils	Undervoltage Release Delay (MN Delay Units)

Remote ON/OFF Control Accessory

Various remote ON/OFF configurations are possible using different combinations of the accessories below.

Diagnostic & Communicating Coils with diagnostic and communication functions in addition to opening and closing the device:
- A diagnostic and communicating shunt close (XF diag&com).
- A diagnostic and communicating shunt trip (MX diag&com).
- A second diagnostic and communicating shunt trip (MX2 diag&com) or a diagnostic undervoltage release (MN diag). The second shunt trip (MX2 diag&com) and the undervoltage release (MN diag) provide only the diagnostic function. The control functions over the communication network for opening and closing the device cannot be performed.
NOTE: The diagnostic and communicating accessories require the installation of an isolation module.
Basic Coils to open and close the device:
- A shunt close (XF).
- A shunt trip (MX).
- A second shunt trip (MX2) or an undervoltage release (MN).

Spring Charging Motor (MCH) to charge the spring.
Signalling Accessories to enhance convenience:
- Ready-to-close contact (PF)
- Device ON/OFF indication (OF)
- Overcurrent trip indication (SDE)
Other Options to complete the solutions:
- The electrical closing pushbutton (BPFE) requires the installation of a shunt close (XF diag&com).

Remote Control Solutions

Three remote control solutions are provided by Masterpact MTZ devices.

Wiring Basic Coils (XF, MX, MN)

Masterpact MTZ circuit breakers can be opened and closed remotely by using the output contacts of a PLC or a pushbutton wired to the coils (MX, MN, XF). This solution requires hard wiring between the circuit breaker and the location from where the operation is conducted.

[1] It is possible to add a second voltage release (MX) or an undervoltage release (MN).

[2] The maximum lengths of the wiring between the AC/DC power supply and voltage release terminals A1-A2 / C1-C2 / C11-C12 / D1-D2 are given in Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Basic Coils.

Wiring Diagnostic and Communication Coils (XF diag&com, MX diag&com, MN diag)

XF diag&com,
MX diag&com,
MN diag

When coils with diagnostic functions are used in customer wiring, the following diagnostic information is available in addition to remote operation. The information can be accessed through the Micrologic X embedded HMI, wireless communication, and Ecoreach through USB connection.

Identify the type of the coil, MX diag&com, XF diag&com or MN diag.
Detect if the coil is functioning properly by comparing the release order and the opening/closing status of the circuit breaker.
Check if there is any breakage of the wiring in the coil periodically (every 30 seconds).
Identify if the order comes from the electrical close push button (BPFE) option.
Identify if the order is a permanent order.
Count the operation cycle of the coils.

NOTE: When MX or XF diagnostic and communicating coils are used, the third wire (A3, C3, C13) must be connected. When the control voltage (A3-A1, C3-C1, C13-C11) is applied to the coils, wait 1.5 seconds before issuing an order. Pay special attention to control voltage when using these coils in applications where the power supply may disappear such as source changeover systems.

Communication Network Connection with Diagnostic and Communication Coils (XF diag&com, MX diag&com)

When a communication system is present, the Masterpact MTZ device can be opened and closed from a remote control system such as a SCADA, through the communication network.

In addition to the functions of the previous solution, this solution brings the following benefits:

The communication network provides location flexibility and can reduce wiring costs.
Diagnostic information can be accessed remotely through the communication network but not from the Micrologic X embedded HMI.

A communication network solution and point-to-point solution can be implemented together when using communication coils.

[1] It is possible to add a second MX diag&com voltage release or an MN diag undervoltage release.

[2] Maximum length of the two wires cables between A2-A3 / C2-C3 / C12-C13: 5 m (16 ft.).

[3] For the maximum lengths of the wiring between the AC/DC power supply and voltage release terminals A1-A3 / C1-C3 / C11-C13 /D1-D2 see Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Basic Coils.

Controlling the Masterpact MTZ Circuit Breaker Open/Closed Status

The table below summarizes all the possibilities for controlling the Open/Closed status of a circuit breaker in different operating modes.

Controlling the Open/Closed Status in Different Operating Modes
Connection	Coils	Method	Micrologic X Control Unit Operation Mode Setting					Limited to One Mode*	Diagnostic Information*
Connection	Coils	Method	Manual	Auto Local		Auto Remote		Limited to One Mode*	Diagnostic Information*
Customer wiring	Diagnostic & Communicating coils (XF diag&com, MX diag&com, MN diag)	Pushbutton
		BPFE coil connection
		Wireless pushbutton
		BPFE via Micrologic X
		Digital input (IO module)					*
		Ecoreach software via USB
		Masterpact MTZ mobile App (Bluetooth technology)
	Basic coils (XF, MX, MN)	Pushbutton
	Basic coils (XF, MX, MN)	Wireless pushbutton (XB5)
Network solution with COM communication option	Diagnostic & Communicating coils (XF diag&com , MX diag&com)	BPFE via Micrologic
		Digital Input (IO module)			*
		Ecoreach software via USB
		SCADA via IFE/EIFE
		FDM128 via IFE/EIFE
		Ecoreach software via IFE/EIFE
		Webpage via IFE/EIFE
		Masterpact MTZ mobile App (Bluetooth technology)

Selection of Coils

Three common cases illustrate the possible choice of coils.

Case I: Remote Opening

This solution enables the opening of the circuit breaker in case of an emergency.

Case II: Remote Opening and Closing

When both remote opening and closing is required then solution II must be considered, which also includes the motor operator to recharge the mechanism spring.

Case III: Remote Closing and Opening with Second MX or MN Coil

When redundancy of mechanisms is required in certain installations, a second MX/MX diag&com or MN/MN diag can be added.

The additional MN diag benefits the following situations.

When the voltage drops by 35 to 70% of its rated voltage, MN diag will open the circuit breaker automatically.
When MX diag&com does not receive the order or does not open the circuit breaker after receiving the order, MN diag can be triggered to open the circuit breaker.

	Customer Wiring with Basic Coils	Customer Wiring with Diagnostic & Communicating Coils	Communication Network Connection with Diagnostic & Communicating Coils
User Case I: Remote Opening	Option I: Shunt trip MX Option II: Instantaneous undervoltage release MN	Option I: Shunt trip MX diag&com Option II: Instantaneous undervoltage release MN diag	Option I: Shunt trip MX diag&com
User Case II: Remote Opening and Closing	Option I: Shunt trip MX Shunt close XF Electrical motor MCH Option II: Instantaneous undervoltage release MN Shunt close XF Electrical motor MCH	Option I: Shunt trio MX diag&com Shunt close XF diag&com Electrical motor MCH Option II: Instantaneous undervoltage release MN diag Shunt close XF diag&com Electrical motor MCH	Option I: Shunt trip MX diag&com Shunt close XF diag&com Electrical motor MCH
User Case III: Remote Closing and Opening with 2nd MX or MN coil	Option I: Shunt trip MX Shunt close XF Electrical motor MCH Instantaneous undervoltage release MN	Option I: Shunt trip MX diag&com Shunt close XF diag&com Electrical motor MCH Instantaneous undervoltage release MN diag	Option I: Shunt trip MX diag&com Shunt close XF diag&com Electrical motor MCH Instantaneous undervoltage release
NOTE: An adjustable or non-adjustable delay unit can be added to MN and MN diag in all situations. An isolation module is required for all connections between Micrologic X and diagnostic & communicating coils (XF diag&com, MX diag&com and MN diag). When a second MX diag&com or a MN diag coil is used, the diagnostic function only can be performed for these two coils. The communication function is not provided.

Customer Wiring with Basic Coils

Customer Wiring with Diagnostic & Communicating Coils

Communication Network Connection with Diagnostic & Communicating Coils

User Case I:

Remote Opening

Option I:

Shunt trip MX

Option II:

Instantaneous undervoltage release MN

Option I:

Shunt trip MX diag&com

Option II:

Instantaneous undervoltage release MN diag

Option I:

Shunt trip MX diag&com

User Case II:

Remote Opening and Closing

Option I:

Shunt trip MX
Shunt close XF
Electrical motor MCH

Option II:

Instantaneous undervoltage release MN
Shunt close XF
Electrical motor MCH

Option I:

Shunt trio MX diag&com
Shunt close XF diag&com
Electrical motor MCH

Option II:

Instantaneous undervoltage release MN diag
Shunt close XF diag&com
Electrical motor MCH

Option I:

Shunt trip MX diag&com
Shunt close XF diag&com
Electrical motor MCH

User Case III:

Remote Closing and Opening with 2nd MX or MN coil

Option I:

Shunt trip MX
Shunt close XF
Electrical motor MCH
Instantaneous undervoltage release MN

Option I:

Shunt trip MX diag&com
Shunt close XF diag&com
Electrical motor MCH
Instantaneous undervoltage release MN diag

Option I:

Shunt trip MX diag&com
Shunt close XF diag&com
Electrical motor MCH
Instantaneous undervoltage release

NOTE:

An adjustable or non-adjustable delay unit can be added to MN and MN diag in all situations.
An isolation module is required for all connections between Micrologic X and diagnostic & communicating coils (XF diag&com, MX diag&com and MN diag).
When a second MX diag&com or a MN diag coil is used, the diagnostic function only can be performed for these two coils. The communication function is not provided.

Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Diagnostic and Communicating Coils

These type of coils bring added functionality with diagnostic and communication capabilities:

Identify the type of the coil, MX diag&com, XF diag&com or MN diag.
Detect if the coil is functioning properly by comparing the device order and the opening/closing status of the circuit breaker.
Check for wire breakage in the coil periodically (every 30 seconds).
Identify if the order comes from the BPFE option.
Identify if the order is a permanent order.
Count the operating cycles of the coils.

Results can be read through all the different ways of retrieving information from the Micrologic X control unit (see Micrologic X Control Unit), including the embedded HMI, wireless communication, and Ecoreach software through a USB connection. If the coils are connected to the communication system, they can also be accessed through the communication system.

Please refer to recommended wiring schematic and user guide for the diagnostic and communicating coils to prevent incorrect wiring and operation.

Communication Function

In addition to hard wiring, these coils can be connected to the communication network.

This allows the coils to be integrated in the communication system. Providing flexibility for remote operations, and the diagnostic function’s results can be assessed remotely as well.

MN diag only has the diagnostic function. It cannot be connected to a communication network.

Continuous-Type Release Action

In addition to the diagnostic function, these devices feature a continuous-type release; the release can be maintained as long as the order is maintained. This feature allows the MX diag&com to lock the circuit breaker in the OFF position when the order is maintained.

Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Basic Coils

XF Shunt Close and MX Shunt Trip

When signalled, the shunt close (XF) and shunt trip (MX) instantaneously triggers the mechanism to close/open the circuit breaker. The undervoltage trip (MN) also opens the circuit breaker when its supply voltage drops to a value between 35% and 70% of its rated voltage. Circuit breaker closing is possible only when the supply voltage of the undervoltage release returns to 85% of its rated value.

MN undervoltage release locks the circuit breaker in the OFF position when it is not energized.
MX opening voltage release can lock the circuit breaker in the OFF position if the order is maintained.

Coil Characteristics

The XF, MX, MN, XF diag&com, MX diag&com, and MN diag coils require a power supply separate from the Micrologic X control unit power supply.

NOTE: The minimum duration of the pulse operating order must be 200 ms.

[1] For XF diag&com the supply shall be present between terminals A1-A3.

[2] For MX diag&com the supply shall be present between terminals C1-C3.

XF and MX Characteristics
Characteristics		XF, XF diag&com	MX, MX diag&com
Power Supply	Vac 50/60 Hz	24 - 48 - 100/130 - 200/250 - 277 - 380/480
Power Supply	Vdc	12 - 24/30 - 48/60 - 100/130 - 200/250
Operating Threshold		0.85 to 1.1 Vn	0.7 to 1.1 Vn
Consumption (VA or W)		Hold: 4.5	Hold: 4.5
Consumption (VA or W)		Pick-up: 200 (200 ms)	Pick-up: 200 (200 ms)
Circuit Breaker Response Time at Vn		MTZ1: 55 ms ±10	55 ms ±10
		MTZ2: 70 ms ±10
		MTZ3: 80 ms ±10

MN Characteristics
Characteristics		MN, MN diag
Power Supply	Vac 50/60 Hz	24 - 48 - 100/130 - 200/250 - 380/480
Power Supply	Vdc	24/30 - 48/60 - 100/130 - 200/250
Operating Threshold	Opening	0.35 to 0.7 Vn
Operating Threshold	Closing	0.85 Vn
Consumption (VA or W)		Hold: 4.5
Consumption (VA or W)		Pick-up: 200 (200 ms)
MN Consumption with Delay Unit (VA or W)		Hold: 4.5
MN Consumption with Delay Unit (VA or W)		Pick-up: 200 (200 ms)
Circuit Breaker Response Time at Vn		40 ms ±5 (Masterpact MTZ1)
Circuit Breaker Response Time at Vn		90 ms ±5 (Masterpact MTZ2, MTZ3)

Recommended Maximum Cable Lengths
		12 V		24 V		48 V
		2.5 mm²	1.5 mm²	2.5 mm²	1.5 mm²	2.5 mm²	1.5 mm²
MN, MN diag	V source 100 %	—	—	58 m (190 ft.)	35 m (115 ft.)	280 m (920 ft.)	165 m (541 ft.)
MN, MN diag	V source 85 %	—	—	16 m (52 ft.)	10 m (33 ft.)	75 m (246 ft.)	45 m 148 ft.)
MX-XF	V source 100 %	21 m (69 ft,)	12 m (29 ft.)	115 m (377 ft.)	70 m (230 ft.)	550 m (1804 ft.)	330 M (1083 ft.)
MX-XF	V source 85 %	10 m (33 ft.)	6 m (20 ft.)	75 m (246 ft.)	44 m (144 ft.)	350 m (1148 ft.)	210 m (689 ft.)
NOTE: The indicated length are given for each of the two wires of the cables.

Undervoltage Release Delay (MN Delay Units)

Adjustable or non-adjustable delay unit

To reduce circuit breaker nuisance tripping during short voltage drops, delay units can be installed to delay the undervoltage release (MN) and only trigger the release when voltage is low for a certain period of time. It can be disabled by an emergency OFF button to obtain instantaneous opening of the circuit breaker.

Two versions of the delay unit are available, adjustable and non-adjustable.

MN Delay Units Characteristics
Power supply Vac 50-60 Hz / Vdc	Non-adjustable	100/130 - 200/250
Power supply Vac 50-60 Hz / Vdc	Adjustable	48/60 - 100/130 - 200/250 - 380/480
Operating threshold	Opening	0.35 to 0.7 Vn
Operating threshold	Closing	0.85 Vn
Delay unit consumption	Pick-up: 200 (200 ms)	Hold: 4.5
Circuit breaker response time at Vn	Non-adjustable	0.25 s
Circuit breaker response time at Vn	Adjustable	0.5 s - 1 s - 1.5 s - 3 s

Isolation Module for Diagnostic and Communicating Coils

Isolation Module

The isolation module is required for XF diag&com and MX diag&com.

When diagnostic and communicating coils are required, the internal isolation module for Micrologic X control unit is required to provide reinforced insulation as per IEC 60664-1 (up to 12 kV). It is installed between the coils and the Micrologic X control unit. Besides the isolation between the electric network and the Micrologic X control unit, it also provides the insulation between the coils. It is necessary because the coils can be powered by different voltages.

Electrical Closing Pushbutton (BPFE) with Diagnostic & Communicating Functions

NOTE:

Only one isolation module is needed regardless of the number of voltage release installed. To make sure the isolation module is ordered for diagnostic and communicating voltage release, it will be added to the purchase list automatically when XF diag&com, MX diag&com or MN diag is selected.
For safety reasons, do not use a 277-380/480 V voltage release with a 24/48 V voltage release in the same circuit breaker.
When the BPFE is also ordered, the BPFE is connected in the factory to the isolation module.

Electrical Closing Pushbutton (BPFE)

Located on the front cover of the circuit breaker, this push button carries out electrical closing of the circuit breaker, taking into account the functions installed as part of the control/monitoring system of the installation.

The Electrical Closing Pushbutton (BPFE) requires the XF Diag&Com shunt close to be installed on the circuit breaker.

The BPFE does not operate with a standard XF shunt close.

The standard solution is done in the factory. When the BPFE option is ordered, the circuit breaker will be delivered equipped with the BPFE and a XF diag&com shunt close, both connected on the isolation module. The two functions of the XF diag&com shunt close (remote control through Micrologic X control unit and diagnostic) are operational.

Terminal A2 of the XF diag&com shunt close can be used to close the circuit breaker by means of an external closing pushbutton. Terminal A3 can be used to insert the safety functions of the installation

For personnel and equipment protection, the BPFE is generally associated with the pushbutton locking VBP that prevents access to the mechanical closing pushbutton.

BPFE Standard Solution (factory installed)

BPFE with Diag&amp Communicating Function Not Used

Remote Reset After Overcurrent Trip

When an overcurrent trip happens, the overcurrent trip indicator (SDE) indicates ‘fault’ and the blue reset button on the upper left of the circuit breaker cover pops up. To close the circuit breaker, the reset button needs to be pressed down.

To do a remote reset after an overcurrent trip, two solutions, RES and RAR, are provided.

Electrical Reset After Overcurrent Trip (RES)

Use the electrical reset after overcurrent trip (RES) after tripping to reset the overcurrent trip switch (SDE) and the mechanical indicator (blue reset button located on the upper left of the circuit breaker cover). (Voltage rating: 110/130 Vac and 200/240 Vac.)

NOTE: The additional overcurrent trip indication contact (SDE2) is not compatible with RES.

Automatic Reset After Overcurrent Trip (RAR)

The automatic reset after overcurrent trip (RAR) automatically resets the circuit breaker following tripping, pressing the button to reset the mechanical indicator is no longer required to enable circuit breaker closing (factory installed only).

NOTE: To achieve remote closing after overcurrent trip, the shunt close (XF) and spring charging motor (MCH) are required in addition to RES or RAR.

An opening order always takes priority over a closing order.

If opening and closing orders occur simultaneously, the mechanism discharges without any movement of the main contacts. The circuit breaker remains in the open position (OFF).
In the event of maintained opening and closing orders, the standard mechanism provides an anti-pumping function by blocking the main contacts in the open position.
After overcurrent tripping or intentional opening of the circuit breaker, the closing order must be discontinued, then reactivated to close the circuit breaker.
To avoid pumping after an overcurrent trip when the automatic reset after overcurrent trip (RAR) option is installed, the automatic control system takes into account the type of trip before issuing a new closing order or blocking the circuit breaker in the open position.

Spring Charging Motor (MCH)

The spring charging motor automatically charges the spring mechanism when the circuit breaker is closed. Instantaneous reclosing of the circuit breaker is thus possible following opening. The spring-mechanism charging handle can be used as a backup if the auxiliary power supply is absent.

The spring charging motor (MCH) is equipped as standard with a limit switch contact that signals the charged position of the mechanism.

The spring charging motor (MCH) requires a power supply separate from the Micrologic X control unit power supply.


Spring Charging (MCH) for Masterpact MTZ1 Devices	Spring Charging Motor (MCH) for Masterpact MTZ2 and MTZ3 Devices

Characteristics
Power Supply	Vac 50/60 Hz	48/60 - 100/130 - 200/240 - 277- 380/415 - 400/440 - 480
Power Supply	Vdc	24/30 - 48/60 - 100/125 - 200/250
Operating Threshold		0.85 to 1.1 Un
Consumption	VA or W	180
Motor Overcurrent		2 to 3 In for 0.1 s
Charging Time		Maximum 3 s for Masterpact MTZ1
Charging Time		Maximum 4 s for Masterpact MTZ2, MTZ3
Operating Frequency		Maximum 3 cycles per minute
CH Contact		10 A at 240 V