SRM switchgear

The SRM6-12 inflatable SF6 metal-enclosed fully insulated series of bad network switchgear independently developed by our company has passed the type test of the National High Voltage Electrical Apparatus Test Center and has been listed as a high-tech product in Hebei Province. The products are widely used in 10kV/6kV power distribution systems, and are the first choice switch products for various user power transformation and distribution systems in urban and rural areas.

The switchgear is a modular unit model, which can be combined according to different purposes; there are two types of fixed unit combination and expandable unit to meet the needs of various substations for flexible use of compact switchgear.

The SRM6-12 inflatable grid cabinet is a completely sealed system, and its live parts and switches are enclosed in a stainless steel body. The entire switchgear is not affected by external environmental conditions, thus ensuring operational reliability and personal safety. And it is maintenance-free. By selecting the expandable busbar, any combination can be realized to achieve full modularization. Extended bus safety insulation and shielding ensure reliability and safety. The SRM6-12 inflatable ring network cabinet can also provide TV-based automation solutions, forming the concept of intelligent switches, and minimizing the workload of on-site installation and commissioning.

SRM6-12 inflatable ring network cabinet is divided into non-expandable standard configuration and expandable standard configuration. Due to the combination of full modules and half modules and self-expandability, it has very special flexibility.

SRM6-12 inflatable bad network cabinet implements GB standard. The design life of operation under indoor conditions (20°C) is more than 30 years.

Product model main features

♦Operation safety

♦Through the following security measures, we can provide users with special security protection:

◊Integrated three-position load switch

◊The circuit breaker uses a load switch instead of an isolating switch, which is safer and more reliable

◊ The fully enclosed design on the primary side provides protection from external contact

◊Mechanical interlock that meets the requirements of five defenses

◊Live indicator can provide live indication of incoming and outgoing lines

♦Reliable operation

◊Full-closed design, all 10kV switches and bus electrified parts are sealed in the air box welded by 3mm stainless steel plate; equipped with silicon rubber cable plug, to realize the full insulation and full sealing of the cable head, so as not to be free from dust, moisture, small animals and other outside world environmental impact

◊Spring energy storage operating mechanism, which can be operated manually or electrically

◊ Panel analog line diagram provides switch position indication

◊The cabinet is made of galvanized sheet, and the surface is electrostatically sprayed to enhance the corrosion resistance

◊The pressure gauge monitors the safe pressure range of SF6 gas in the box

♦Economy

◊Maintenance-free

◊ Highly reliable

◊ Service life up to 20 years

♦Flexible plan

◊A variety of wire entry methods, which can realize left, right, upper or forward wires

◊A variety of combinations, any combination of units can be realized

◊Using insulated busbars, it can realize front-to-back or left-right combination of cabinets

◊ Flexible design

♦Wide application

◊The feeder line has a large room and a small footprint, suitable for various application requirements

Design NotesDesign Notes

♦Technical Description

SRM6-12 series inflatable switchgear is installed on a galvanized sheet frame, the switch unit is inside the SF6 gas box, and the gas box is made of corrosion-resistant and non-magnetic 3mm thick stainless steel plate.The SF6 gas tank is a "sealed pressure system" that can run for 20 years under normal working conditions. The pressure of SF6 gas is 0.15~0.4bar when it works normally. The gas box is equipped with a pressure release device, which ensures that the gas can be released from the bottom or rear when the pressure is too high.

♦Switch unit

The load switch adopts the method of coaxial rotation with double breakpoints, through the same operation hole and the sliding plate for kinetic operation, so the switch can only be in one of the three states of "closing, opening, and grounding" at any time, completely avoiding errors operate.

♦Operating mechanism

The operating mechanism of the switch is installed on the front outside the air box, which is treated by special process, anti-corrosion, convenient for manual operation and maintenance, and it is easy to realize electric operation.