TAVRIDA Electric |
MILE MP 12,MP17 and MP 24
The switchgear is modular and is built up by placing standardized units side by side in a coordinated way. The switchgear is easy to configure and selection of the apparatus and instruments does not imply dedicated solutions. The functional units of the switchgear are guaranteed arc proof AFLR 31,5kA 1s in accordance with the IEC 62271-200 standard, appendix AA, class A accessibility, criteria 1 to 5. All the start-up, maintenance and service operations can be carried out from the front. The switchgear and the earthing switches are operated from the front with the door closed. The MILE MP series switchgear can be with front access or with front and rear access. Type testingThe MILE switchgear has successfully passed all the tests specified by relevant IEC (International Standard) and GOST (Russian national standard) standards. As noted within the regulations of these standards, the tests were carried out on the switchgear units considered to be the most sensitive to stresses applied within the tests and therefore assigned to be valid on the whole range. Degrees of protectionThe degrees of protection of the switchgear conforms with IEC 60529 tandard. The MILE MP series switchgear is normally supplied with the following standard degrees of protection: IP4X on the external housing IP3X with the doors open
IP 42 on requestNormal service conditionsThe rated characteristics of the switchgear are guaranteed under the following ambient conditions:
*with selected microprocessor electronic only
The MILE MP series switchgear are suitable for operation in the climate of Wda type in accordance with IEC 60721-2-1 standard.
Vacuum Circuit Breaker![]() Completely avoided is failure of critical components such as
• mechanical latching
• gears, chains, bearings and levers
• tripping and closing coils
• motors to charge springs
The result is up to 150,000 C-O cycles at rated current or up to 100 operations at full short circuit breaking current without the need to replace or adjust any parts.Tavrida Electric vacuum circuit breakers are maintenance free over the total life expectancy of at least 25 years.
Main Busbars
Magnetic actuatorThe actuator is held in its two end positions without the use of mechanical latches:
in the OPEN position the armature is held by the opening spring in the CLOSED position the armature is held by the magnetic flux produced by a ring magnet.This actuator has only one coil. To close and trip the actuator it is necessary to inject current into the coil in different directions.
![]() Vacuum interruptersSeveral major benefits result from this design:
• high interrupting capacity;
• very compact dimensions;
• low chopping current (4-5 amps) This limits inductive switching over voltages to safe values;
• Axial magnetic field minimizes contact erosion and ensures a very long and reliable life.
CONTROL MODULE DESIGNThe control module is intended for actuator operations using the energy stored in the closing and opening capacitors. It is an intelligent, microprocessor-based device capable of providing optimal control of the magnetic actuators irrespective of the quality of external power or environmental effects. The module also incorporates monitoring features providing supervision of the state of the magnetic actuator coil circuit as well as self-monitoring functionality.
The control modules are totally enclosed in an extruded aluminum housing designed for simple, flat surface, 4-hole mounting.
Basic Structure
An indoor switchboard consists of different number and types of MP panels with switching devices, control and protection relays, signaling and metering devices and Other auxiliary equipment, which are interconnected by control cabling. The basic structures of the MP panels are given below.
Cross-Section Cassette type
|
Voltage |
Width, A mm |
Depth, B mm |
Height, C mm |
12kV |
600, 750, 1000 |
1350 |
2200 |
17,5kV |
600, 750, 1000 |
1350 |
2200 |
24kV |
750, 1000 |
1560 |
2200 |
|
24 Kv
|