Thyristor switches for capacitors MTK-2, MTK-3

MTK-26-50 MTK-25-50  
Тиристорные коммутаторы МТК-24-50 Тиристорный коммутатор МТК-25-50-480 открытый  
Тиристорные коммутаторы МТК-24-50 Тиристорный коммутатор МТК-25-50-480 открытый  
MTK-25-50-480 UHL4
12000.00 руб. с НДС

MTK-25-100-480 UHL4
17000.00 руб. с НДС

MTK-25-150-480 UHL4
27000.00 руб. с НДС

MTK-26-50-480 UHL4
15000.00 руб. с НДС

MTK-26-100-480 UHL4
20000.00 руб. с НДС

MTK-26-150-480 UHL4
31000.00 руб. с НДС

 
 Features of switches MTK
- Provides fast switching of condenser batteries - up to 20 times per second
- Switching occurs practically at zero current at the time of equality voltage across the terminals of the capacitor and the net (zero crossing)
- Due to low switching currents a life of capacitors is extended
- Control voltage is DC24V
- Built-in thermostat turns off the unit if the temperature rises above 1000C
- In models with a ventilator, to extend the service life of the ventilator of switch, it is activated only when the heting radiator to a temperature of  600С
- Operating voltage - 150-480V, 50-60Hz
 
 
ARTICLES on the selection switch for condenser installations.
 
 Features of switching capacitors UKRM by thyristor switches - Part 1
 Features of switching capacitors UKRM by thyristor switches - Part 2
 

Purpose

 Contactless thyristor contactors of series MTK-2 and MTK-3 of production JSC Meander (Russia, St. Petersburg) are designed for switching of compensation capacitors in installations for reactive power compensation (UKRM). This reactive power control method is applied to power grids, where the nature of the load changes very quickly, for example, with welding machines, stamping presses, lifts, cranes, controlled electric drive, etc.
 
Advantages of thyristor contactors
 The advantage of MTK thyristor modules in comparasion with classical electromagnetic contactors is a connection of  the capacitor to the net without prior discharge. This capability is determined by the algoritm of MTK operation, that is included in the time of equal voltages on conclusions of the capacitor and in the net ("AT ZERO OF CURRENT"). Because of this function follows another important advantage - a significant reduction of transient current pulses. The current pulses cause interferences, that can disrupt the proper operation of the electronic devices, causing considerable damages and even remove them from the system. Furthermore, the service life of capacitors, as therethrough through them flows only rated current. To protect thyristor keys from the peak current in chain should be included an inductance at least 15uH.
 
Design
 Thuristor contactors of series MTK-25 and MTK-26 are thyristor modules, mouted on a common coller, and a control circuit , mounted in one case. In models of MTK-26 is added built-in high-speed fuses. At the front panel of the regulator there is a green LED of indication a state of switch and a red LED of dangerous on capacitor battery.
 
SPECIFICATION OF MTK-2 and MTK-3
A parameter
Unit
MTK-25-50
MTK-26-50
MTK-25-100
MTK-26-100
MTK-25-150
MTK-26-150
Maximum operating voltage of net
V
480
The maximum allowable voltage
V
1600
Character of the load
 
C/R/L
Maximum allowable speed of current rise dI/dt
A/mcs
50
The maximum operating current (IRMS) (at a maximum temperature of an environment 450C)
A
50 100 150
A fuse
 
no
there is
no
there is
no
there is
I²t; Tvj=125°C; 8.3...10ms
A²s
9100
9100
28800
28800
28800
28800
Power *
kVA/V

33/380

35/400

38/440

41/480

33/380

35/400

38/440

41/480

66/380

70/400

76/440

83/480

66/380

70/400

76/440

83/480

99/380

103/400

114/440

125/480

99/380

103/400

114/440

125/480

Maximum power loss
Wt
128
141
256
284
385
427
Rapid discharge of capacitors
30
Built-in module of discharge capacitor
Temperature of activating ventilator
0С
-
-
60±5
60±5
60±5
60±5
Temperature of switch's turning off
0C
100±5
Voltage of control signal
V
DC24±20%
Operating temperature range (different versions)
0C -25…+55
Storage temperature 0C -40…+70
Climatic modification and placement category by GOST 15150-69 (non-condensing)
  UHL4
The degree's protection according to by GOST 14254-96
 
IP00
The degree of pollution in accordance with GOST 9920-89
 
2
Relative humidity of air % up to 80 (at 250C)
Heigh above sea level
m till 2000
Operating position in space
  vertical
Mode   round the clock
Cooling
 
unconstrained ventilator
* - information for order.
 
Warning!
- Thyristor switches are not designed for the separation of electric circuits, so when connecting the need to take measures to isolate them from the mains.
- The manufacturer constantly improves the design and manufacturing technology, and MTK reserves the right to make changes without lowering product performance.
 
Example of circuit connection of thyristor contactor MTK-25
Схема подключения МТК-25
 
Example of circuit connection of thyristor contactor MTK-26
Схема подключения МТК-26
 
Title
Order code
File to download
(manual)
File date
MTK-25-150-480 UHL4 4640016938438 Download v02.12.2015
MTK-25-100-480 UHL4 4640016937080
MTK-25-50-480 UHL4 4640016937097
MTK-26-150-480 UHL4 4640016939114
MTK-26-100-480 UHL4 4640016937653
MTK-26-50-480 UHL4 4640016937103
English
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