Schneider Universal Circuit Breaker MT Series Instruction Manual
Schneider Universal Circuit Breaker MT Series Instruction Manual
Schneider Universal Circuit Breaker MT Series Overview
Generally speaking, the Schneider Masterpact MT universal circuit breaker can be divided into seven types of breaking, the details are as follows:
1. N1 standard type, which can be used to break low-level short-circuit currents;
2. Type N2 can be applied to general applications;
3. Type H1 is suitable for breaking high-level short-circuit currents in industrial environments, or in electrical systems operating with two transformers connected in parallel;
4. H1b type can be applied to industrial industries with large short-circuit current;
5. H2 high-performance type, this type of Schneider universal circuit breaker is suitable for heavy industry fields where very high short-circuit current may occur;
6. H3 type is usually used in places that require high-performance breaking capacity and high-level cooperation;
7. Type L1 has high current-limiting capability, and can also be used to protect the feeder unit or when the rated power of the transformer is increased, but also to improve the performance level of the switchgear.
In addition to seven different breaking types, the MT series of Schneider universal circuit breakers can also be integrated into the general management system to optimize the operation and maintenance of the equipment. The communication structure adopts an open design and can be applied to any protocol.

There are only three sizes of universal circuit breakers of different specifications and models, which makes installation and selection more convenient and faster. First of all, Masterpact MT-N1 is from 630A to 1600A. It can be said that it is the smaller circuit breaker in the world so far. . Secondly, MT-N2, H1, H1b, H2, H3, and L1 Schneider circuit breakers adopt the same size design from 800A to 4000A. Finally, Masterpact MT series H1 and H2 are the same size from 4000A to 6300A.
Schneider Universal Circuit Breaker MT Series Features
◆Volume optimization
Major innovation: Masterpact MT-N1 is a small high-performance universal circuit breaker with a pole pitch of 70 mm, and can install a drawer type three-pole circuit breaker to a width of 400 mm and a depth of 400 mm In the switch cabinet.
The new series of products take Masterpact further in terms of installation. They are designed for standard switchgear, optimized size and simple installation:
●The upper or lower incoming line connection does not need to consider derating;
●No safety distance required;
●Connection:
○Connect horizontally or vertically;
○Front connection for smaller space;
○Mixed connection before and after;
●The pole spacing is only 115mm;
●When the 4000A is connected vertically, there is no derating below 55℃.
The dimensions of Masterpact MT-N2, H and L models of models below 4000A are the same, that is to say, they are the same as the previous M08 to M32. From 4000A to 6300A, all universal circuit breakers have the same size and are smaller than before.
◆ More convenient transformation
Provide special connectors for Masterpact MT to replace the original Masterpact M08 to M32, drawer type or fixed type, without changing the opening size of the busbar and cabinet door.
The "plug and play" solution can replace the Masterpact MT circuit breaker within a user-acceptable outage time. The chassis of the Masterpact MT circuit breaker on site is retained. You only need to replace the circuit breaker body when the relevant circuit is isolated. There is no need to adjust the busbars and cables in the switch cabinet. Under normal circumstances, the replacement time only takes 30 minutes.

◆Easy to install
The optimized Schneider universal circuit breaker MT series also indirectly simplifies the design and installation of the switchgear. It can adopt four connection layouts:
○One type of N1 from 630A to 1600A;
○One of 800A to 3200A specifications;
○One of 4000A specifications;
○One of 4000A to 6300A;
●Schneider MT series circuit breakers of N type and H type of 800A to 6300A specifications (except 4000A) have the same connection terminals;
●The front connection does not need to leave space, because the terminal does not increase the depth of the circuit breaker;
●After connecting on the horizontal or vertical busbar, just turn the connecting terminal 90 degrees.

Schneider universal circuit breaker MT series selection
◆Universal circuit breaker
●Scope:
○Masterpact MT630 to 1600A N1 type.
○Masterpact MT800 to 6300A N2, H, L type.
○Masterpact NW08 to 40H10.
●Schneider universal circuit breaker models: N1, N2, H1, H1b, H2, H3, L1.
●3 or 4 poles.
●Fixed or drawer type.
●The right neutral line can be selected.
● Derating protection.
◆The selection table is shown below:

Schneider universal circuit breaker MT series configuration
The button of the device is locked by a transparent cover that can be padlocked, and the locking action can be realized by using a padlock or a key to lock in the OFF position. The chassis can be locked in the disconnected position with a key, and the base can be locked in the connection, exit and test positions of the circuit breaker. The door interlock is mainly to prevent the cabinet door from opening when the device is in the connected position. The advance and retreat interlock function can prohibit advance and retreat when the door is opened. The Schneider universal circuit breaker has an automatic locking device for position confirmation and an automatic spring release device before moving, as well as a mismatch protection function.
Universal circuit breaker indicating contacts can choose standard, small capacity or programmable contacts. You can also choose to use remote ON/OFF operation and remote trip function. The accessories involved are secondary terminal cover, operation counter, door frame, door frame transparent cover, door frame panel, etc.
Schneider Universal Circuit Breaker MT Series Parameters
The parameter characteristics of MT06 to 16N1 circuit breakers are shown in the figure below:

The parameter characteristics of MT08 to 63N2, H, L type circuit breakers are shown in the following figure:

The parameter characteristics of 1000V-AC-NW/MT(1)08 to 40H10 circuit breakers are shown in the figure below:

Schneider universal circuit breaker MT series communication architecture

Note:
A, FDM121 (TRV00121)
B, IFE (LV434002)
C, IFE1 (LV434001)
D, IFM (LV434000)
E. I/O (input/output) application module (LV434063)
F, Masterpact MT
G, Compact NS630b-3200
H, Compact NSX
I. ULP terminal resistor (TRV00880)
J, FDM128 (LV434128)
N, Modbus terminal resistor (VW3A8306DRC)
The above is the manual of Schneider universal circuit breaker MT series, I hope it can help everyone. You can also log on to the okplazas.com motor mall to view Schneider product information, welcome to email: [email protected] for consultation, and you can also contact WeChat customer service online at +86-13689242098 for product consultation