Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit

China Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit, Find details about China Sf6 Ring Main Unit, AIS Switchgear from Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit

Basic Info.

Model NO.

SM66

Trademark

Rockwill

Transport Package

Carton

Specification

IEC, GB

Origin

China

HS Code

8535210000

Model NO.

SM66

Trademark

Rockwill

Transport Package

Carton

Specification

IEC, GB

Origin

China

HS Code

8535210000

Product Desciption

Product Description
iUniuswitch Air Insulation Ring Main Unit

iUniswitch, the light flexible switchgear developed as a modular, simple to apply design, with fewer components, providing a high reliable, quality and safe product for you, our Customer. By reducing the number of components, utilising modern materials correctly, we have developed an environmentally and user friendly product. The simple design and construction of iUniswitch will stand the test of time for generations to come.

iUniswitch is an air insulated (AIS), metal enclosed, switchgear cubicle design of the next generation developed through continuous innovation and vision to meet the changing market needs.

iUniswitch provides long-term technical solutions for various applications. Safety, user friendliness and environmental con- cerns have been the driving force in the development of the switchgear.

Feature

iUniswitch product provides our Medium Voltage Customer with the best solution for heavy duty switchgear in a size only a little than a single tank Ring Main Unit while including:

the flexibility in meeting our Customers specification and accomodating on future change and upgrading
the options include complete control, measuring and protection systems

Switchgear Construction
Metal enclosed switchgear
Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit

Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit

Busbar compartment

The busbar compartment is located on the top of the cubicle. This compartment contains the main busbars that intreconnect between switchgear cubicles.

Switching compartment

A 3-position SF6 switch disconnector with epoxy cast resin housing is provided with inspection windows and available also with gas density indicator.

Cable compartment

75 % of the space in the switch disconnector cubicle is reserved for power cable connection making it possible to use both 1- and 3-phase cables with most simple unscreened terminations. Space is also adequate for cubicle accessories such as surge arresters, current transformers, second earthing switch etc. The door has an inspection window and safety interlocking as standard. For cable entry there are 3 individual cable gland plates in the bottom with support for a suitable dimensioned cable clamp. The bottom and the threshold of the cubicle can be removed for ease of cable installation.

Mechanism, interlocking and low voltage compartment

Behind a hinged door (which serves as control panel) are located the spring operating mechanism with position indicator and the mechanical interlocking unit. There are also facilities for cubicle accessories such as: auxiliary contacts, tripping coil, emergency tripping mechanism, capacitive voltage presence indicating system, key interlocks and motor operating device. Space is also provided for control circuits and measuring instruments as well as a protection relay. In the 750 wide cubicles there is also a second indentical compartment for further accessories.

The upper part of the cubicle, including the busbar compart- ment, the switch disconnector and the mechanism and low voltage compartment is separated from the lower part and the cable compartment. Because of this it is possible to carry out maintenance, repair and upgrading of the unit in the lower module while the switchgear is in service.

Switchgear Construction
Primary part
Enclosed Ring Main Unit AIS Rmu 12kv Air Insulated Switchgear Medium Voltage Ring Main Unit

Top unit

3-position switch disconnector SFG
Operating mechanism with mechanical position indication
Enclosure of busbar compartment
Integrated low voltage compartment for secondary components
Interlocking unit
Busbars
Control cable ducts

Bottom unit

Cubicle Types / Cubicle Program

Switch Disconnector Cubicle, type SDC
Switch Disconnector with Fuse, type SDF
Circuit Breaker Cubicle, type CBC
Withdrawable Circuit Breaker cubicle, type CBW
Sectionalising Cubicle, type SEC
Bus Riser Cubicle, type BRC
Sectionalising cubicle with Fuse, type SEF
Sectionalising Breaker Cubicle, type SBC
Direct Busbar connection Cubicle, type DBC
Sectionalising Withdrawable Breaker cubicle, type SBW
Sectionalising Metering cubicle with Disconnector, type SMD
Bus Metering Cubicle, type BMC
Sectionalising Metering Cubicle, type SMC
Universal Metering Cubicle, type UMC

Technical data

Rated voltage			kV	12	24
BIL		common value	kV	75	125
BIL		across the isolating distance		85	145
AC withstand voltage		common value	kV	28 ¹⁾	50
AC withstand voltage		across the isolating distance		32 ¹⁾	60
Rated frequency			Hz	50/60	50/60
Rated current		busbar	A	630/1250	630/1250
Rated current		feeder	A	630/800/1250⁴⁾	630/1250 ⁴⁾
Rated short-time withstand current		main circuit	kA	25	20
Rated short-time withstand current		earthing circuit	kA	25	20
Rated peak withstand current			kA	65	50
Rated duration of short circuit			s	1	1
Arc-fault current, 1s			kA	20	20
Degree of protection, enclosure				IP2XC	IP2XC
Degree of protection, partitions				IP2X	IP2X
Ambient temperature	maximum value		[ºC]	40	40
	maximum value of 24 h-mean			+35	35
	minimum value			-5 ³⁾	-5 ³⁾
Altitude above sea level			[m]	<1000 ²⁾	<1000 ²⁾

1) Higher values in accordance with national standards on request
2) Adjustment is necessary for greater altitudes
3) Lower ambient temperature on request.
4) 1250 A = CBW, SBW, BRC, DBC