Ring Main Unit

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Product specifications

  •  Rated voltage (kV): 7,2- 12-24-36

  •  Busbar operating current (A): 630 - 1250

  •  Short circuit current 1s (kA): 25/20/16/12,5

  •  Capacity (kA): 62.4/50/40/31.5  

 Introduction of Ring Main Unit 

MBT provides switches for primary and secondary distribution upon request of customers. Our products include vacuum cutters and load cutters. The voltage ranges 7.2kV - 12kV - 24kV - 36kV. Rated current up to 3600A.
 
 The switches are designed flexibly; it can be installed for almost brand.
 
 Design switches according to user requirements:

  • Reliability for uninterrupted power supply.
  • The Ring Main Unit is simply installed, convenient for operation and maintenance.
  • Safety for the user.

1. Product scope

  • Rated voltage (kV): 7,2- 12-24-36

  • Short circuit current 1s (kA): 25/20/16/12,5

  • Capacity (kA): 62.5/50/40/31.5

  • Busbar operating current (A): 630 - 1250

2. Ring Main Units are wirely used for

  •  High-rise buildings, hospitals, schools, commercial centers, towers
  •  Aggregate electrical substation
  •  Industrial factory, ...

 3. Standards

Conforms to IEC 62271 - 200 and 60694 standards relating to the manufacture of medium voltage switches and drive control assemblies.

 4. Protection level

 - Enclosure: IP5X according to IEC 60529
 
 - Between each compartment: IP4X

5. Structure

- Panel is made of steel plate according to ISO 50020
 
- Paint: Electro Static Power Coating
 
- Standard color: RAL  

6. Cabinet size

- For cabinets 12kV - 24kV - 36kV
 + Load break switch cabinet: 800W - 2000H - 1200D (mm). (Measurement compartment is 1200mm wide).
 
 + Vacuum circuit breaker cabinet: 1000W - 2300H - 1800D (mm)
 
 + Vacuum circuit breaker and load break switch cabinet: 1000W - 2300H - 1800D (mm)
- For cabinets 7.2kV
 
 + 02 vacuum circuit breakers cabinet: 800W - 2000H - 1200D (mm)
 
 + 01 vacuum breakers cabinet: 800W - 1800H - 1500D (mm)

 7. Protection

The switches are protected by Sheneider digital relays or some different brands, sometimes installed electromagnetic protection relays according to customer requirements.

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