Product description

SMGK uses a modular single product structure type, integrated traditional circuit breakers (fuses), contactors, overload (or over-current, phase-off) protection relays, starters, isolators and other integrated motor protection low-voltage electrical products Main function, with long-distance automatic control and local direct human control function, with panel instructions and electromechanical signal alarm function, with overvoltage and undervoltage protection, with phase failure phase protection function, with under-current power function, with coordination With the time - current protection features (with inverse time, definite time, short circuit instantaneous, super short circuit instantaneous four - stage protection). According to the need for optional function modules or accessories, you can achieve all types of motor load, distribution load control and protection.

SMGK mainly used for AC 50Hz (60Hz), rated voltage to 690V, the main rated current from 6.3A to 125A, intelligent controller adjustable operating current from 0.16A to 125A, the control motor power from 0.05KW to 55KW power system Carrying, and breaking current under normal conditions (including the specified overload conditions) and capable of switching on, carrying, and breaking current under specified abnormal conditions such as short circuits.

This product complies with GB14048.9 standard

○ has the control and the protection self-coordination characteristic;

○ With unparalleled reliability and continuous operation of the system performance;

○ small size, the installation area and volume less, no separation of components contacts to reduce line heating, energy saving energy, saving materials, etc.;

○ Compared with Molded Case Circuit Breaker, it has the characteristics of high breaking capacity and small arcing distance.

○ Molded case circuit breaker with the protection system, compared with the protection setting can adjust the current characteristics;

○ Compared with the performance of the contactor has a long life, easy to operate features.

Model and meaning

Main feature

○ With control and protection from the characteristics

SMGK in breaking short-circuit current can be put into use without maintenance, which has broken short-circuit fault after the continuous operation. SMGK has more than 6,000 AC-44 electrical life-cycles after breaking short-circuit current test, which is difficult to achieve by the system composed of separate devices such as circuit breakers. This characteristic of SMGK greatly improves the operation of the system Reliability and continuous operation of the system performance, which runs short-circuit breaking capacity Ics 80kA indicators are similar products in the international leader, the highest domestic indicators.

○ With unparalleled reliability and continuous operation of the system performance

Traditional products in the start using the full voltage current supply in the electromagnetic coil, the power consumption is great; and connected to maintain the electromagnetic coil is full voltage, the power consumption of not less than 22 watts. This product after the start of power, the use of small voltage and small current to maintain the electromagnetic coil table, the power consumption of not more than 2 watts, energy saving 90%.

○ Energy saving

SMGK overload protection current can be adjusted according to the load power on the panel. Overcame the short-circuit protection of the molded-case circuit breaker. The short-circuit protection function of the SMGK product even when installed at the end of the line, when the short-circuit current is small, can not be adjusted after leaving the factory.

○ Compared with the molded case circuit breaker, it has the characteristics of high breaking capacity and small arcing distance

SMGK rated operating short-circuit breaking capacity at 380V Ics (o-co-co) to achieve a high breaking type of 80kA, 50kA standard, economical type 35kA, 50kA expected short-circuit current breaking time is only 2-3ms, Coefficient of 0.2 or less, to reach the leading level Molded Case circuit breakers, close to the current limit of the fuse, greatly limiting the short-circuit current of the system, thermal shock, arcing distance less than 30mm.

○ Compared with the protection system of the molded case circuit breaker, the protection setting current can be adjusted.

SMGK mechanical life of 500-1000 million times, the electrical life of AC1 to 120-150 million times, both local manual operation, but also long-distance realization of automatic control.

○ Compared with the system consisting of separate electrical appliances

○ Technical characteristics comparison table

The main parameters

○ Two external mounting dimensions: 125 (D frame) and 45 (C frame).

○ The number of poles of the main circuit is divided into three poles and four poles.

○ SMGK control and protective switch electrical basic configuration: the main body + intelligent controller + auxiliary contact group.

○ The main body of the main circuit by the module: the contact system module, short-circuit release, electromagnetic system modules and operating system system modules.

○ short-circuit breaking capacity rating: Economy (C) is 35KA, standard (Y) 50KA, high breaking (H) 80KA.

○ The short-circuit current is expected under the breaking time of 2-3ms, limiting factor 0.2 below.

○ Auxiliary contact group consists of short-circuit alarm contact, overload alarm head and a group of 2 normally open 1 normally closed auxiliary contact composition, 02 is 2 normally open 1 normally closed +1 short circuit 1 overload, 06 is 3 normally open 2 normally closed +1 short-circuit 1 overload, can also be combined according to user requirements, but not more than 11 pairs of contacts.

○ intelligent controller rated current le: 0.4,1,2.5,4,6.3,12,16,18,25,32,40,45,50,63,80,100,125 A.

○ Rated current of main body ln: 12/16/18/32/45/63/100 / 125A.

○ Number of poles: Two digits (the first digit indicates the number of poles and the next digit indicates the number of poles). For example, 33 means 3-pole with 3-pole protection, and 30 means 3-pole without protection.

○ Control power supply voltage: M: AC220V, Q: AV380V

Product Categories

According to the protection object is divided into: motor protection, power distribution protection

According to the operating frequency is divided into: frequent operation, not frequent operation

According to the wiring mode is divided into: before the board, after the board, plug-in

According to the working principle is divided into: digital tube controller, LCD controller

Centralized control

Traditional products can only display and control one-to-one in the cabinet. The product can be connected to the main console through the software protocol and 485 communication interface, and all the parameters can be set through the main console. , The total console can be connected through the agreement and the computer to achieve "four remote" function, especially suitable for MMC motor control center.

Centralized control

○ Conventional typical scheme

○ The latest solution

Characteristic parameter

○ Parameters of the main circuit

The main circuit consists mainly of the main and intelligent release, these two parts constitute the SMGK products can be applied to the minimum configuration. Rated current In, rated heating current Ith, rated insulation voltage Ui, rated frequency, rated operating voltage Ue and the optional intelligent controller rated operating current Ie range or control power range see the following table

○ The basic parameters of the main circuit

○The main parameters of the main circuit

Note: a) The above power range is the reference Y series three-phase asynchronous motor technical parameters; b) If there are special requirements, please contact the manufacturer

Characteristic parameter

○ Applicable rated working system

○ eight-hour work system

○ Uninterrupted working system

○ Intermittent duty cycle: SMGK under the work of the load factor (power-on rate) is defined as 40%. The operating frequency (operating frequency) limits for the different rated operating voltages and the different classes of use are given in the table below:

○ Operating frequency limit

○ Protection type

○ Short-circuit instantaneous protection: The protection current is related with the rated current of the switch body. The setting current is 1s = 20ln ± 20% (effective value) is not adjustable, the operating time is less than 2-3ms.

○ Long-time delay overload protection: reverse characteristic of the tripping characteristic l2t = constant, lr1 = (0.3 ~ 1) le 8 adjustable panel, tripping curve 7.2lr tripping time (2.08 ~ 28.8) .

○ Tripping time error: ± 10% for 2lr1 and ± 20% for 2lr1; tripping curve is set at 6lr1 at the time of shipment and tripping time is 3 seconds.

○ Long-term thermal memory overload: Overload energy 30 minutes + OFF within the release.

○ overload short delay protection: sub-inverse short time delay lt + ON and definite time delay.

○ l2t + OFF two types of tripping characteristics: setting current lr2 = 6/7/8/9/10/11/12,

○ l2r1 + OFF panel 8 adjustable (motor protection) or lr2 = 3 / 3.5 / 4 / 4.5 / 5 / 5.5 / 6,

○ l2r1 + OFF panel 8 adjustable (distribution protection), the current error of ± 10%, the time error of ± 20%; trip curve at 8lrl trip time (0.05 ~ 1) seconds to choose.

○ Overload Short Delay Thermal Memory: Overload energy is released in 15 minutes + OFF.

○ short-circuit instantaneous protection: setting current lr3 = 889810/11/12/14 / 16,12rl + OFF panel 8 adjustable, the current error of ± 15%; action time is less than 50 milliseconds, factory setting in 14lr1 (RMS) .

○ Phase failure protection: The operation setting time is selected between (1 ~ 64) seconds and OFF, the time error is ± 20%, and the factory setting is 10 seconds.

○ Phase failure protection: The operation setting time is between (1 ~ 64) seconds + OFF, the error is ± 20%; the factory setting is 10 seconds.

○ Undercurrent protection: the ratio of the minimum line current to the rated current is selected between (40% ~ 100%) + OFF, the error is ± 15%, and the action setting time is (1 ~ 64) %; Factory setting at 40%, time is 10 seconds.

○ Three-phase unbalanced protection: any two-phase current unbalance rate of more than (20% ~ 100%) + OFF between the choice of current error of ± 15%, action set time (1 ~ 64) seconds, the error is ± 20%; factory set at 30%, time is 10 seconds, (imbalance = (maximum current - minimum current) / maximum current).

○ Overvoltage protection: selection between three phases (145-50)% Un + OFF, operation setting time within (1 ~ 64) seconds, factory setting at 120% of rated voltage, error is ± 5%; Sec with an error of ± 20%.

○ Undervoltage protection: Select between three phases (50-95)% Un + OFF. The operation setting time is selected in (1-64) seconds, the factory setting is 85% rated voltage, the error is ± 5%; the time is 10 seconds, the error is ± 20%.

○ start delay: only for the lack of phase, phase failure, overvoltage, sub-Asia, short circuit, leakage and three-phase unbalance to protect to avoid starting large current and overcurrent: Setting time (1 ~ 99) OFF.

○ The factory setting is 5 seconds and the error is ± 20%.

○ Online programming function: a handheld editor interface.

Characteristic parameter