Product Description
The Solid-Insulated Ring Main Unit is a fully insulated, fully sealed,and maintenance free solid insulation vacuum switchgear. The ring network cabinet has the characteristics of simple structure, flexible operation, reliable interlocking. It is widely used in industrial and civil cable ring networks and distribution network terminal projects, as a means of receiving and distributing electricity, especially suitable for urban residential distribution, industrial and mining enterprises Used in airports, subways, wind power generation, tunnels, and other places.
Technical Parameters
|
Item |
Unit |
Parameter |
|
Rated Voltage |
kV |
12 |
|
Rated Voltage |
Hz |
50 |
|
Power Frequency Withstand Voltage |
kV/min |
42/48 |
|
Lightning Impulse Withstand Voltage |
kV |
75/85 |
|
Arcing Duration |
s |
≥ 0.5 |
|
Protection Level of Primary Components(excluding metering cabinet) |
IP67 |
|
|
Protection Level of Cabinet Enclosure |
IP4X |
|
|
Protection Level Between Compartments |
IP2X |
|
|
Operating Power Supply Voltage |
DC24,48,110,220; AC110,220 |
Technical Parameters of Busbar System
|
Busbar System |
Unit |
Parameter |
|
Rated Current |
A |
360/1250 |
|
Rated Short-time Withstand Current |
kA/s |
20/4(25/4) |
|
Rated Peak Withstand Current |
kA |
50(63) |
Advantages
When the system requires multiple units to be configured ,can be arbitrarily expanded on the left and right sides,and can be arranged arbitrarily according to different design schemes toachieve different configuration requirements.Each unit is structurally divided into three parts: instrument room,operating mechanism and primary circuit.The instrument room can be equipped with microcomputer protection (intelligent controller) and other meters.The operating mechanism is a special spring operation mechanism,which can also be equipped with additional Electric operating mechanism.
Applications
- Urban residential area power distribution
- Small secondary substations
- Switching stations and cable branch boxes
- Compact substations
Frequently Asked Questions
Q1: What is the typical service life of a Solid-Insulated RMU?
A: With proper installation and regular inspection,you can expect a service life of around 20 to 30 years,though it does depend a bit on operating conditions and how heavily the loads are.
Q2: What about partial discharge?
A: Quality solid insulated units are tested to keep partial discharge levels below 20pc,which is actually significantly better than what industry standards call for.The epoxy casting process is carefully controlled to get rid of any voids that could cause discharge issues over time.
Q3: What is the typical lead time?
A: For standard configurations,you are usually looking at about 6 to 8 weeks after order confirmation.If you need something custom,like special current ratings or automation packages,that will probably take a bit longer,around 8 to 12 weeks.
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