MNS 50A Withdrawable Switchgear LV Electrical Panel Board

MNS 50A Withdrawable Switchgear LV electrical panel board

 

 

 

 

MNS three phase low voltage electric switchgear

Operating environment:

1)Ambient temperature:-10°C-+40°C;

2)Altitude: high voltage ≤1000Meter, low voltage ≤2500Meter (technical department will design specially if exceeds);

3)Relative humidity:≤85%

4)Seismic intensity:≤ magnitude 8;

5Apply to the places have no fire,no explosion danger, no serious pollution,no chemical corrosion and no violent vibration.

LV switchgear

Executive standard:

GB7251 Low voltage complete set switchgear and control device

GB3906-2006 3.6kV~40.5kV AC metal enclosed switchgear and control device

 

			Parameter
Rated voltage		V	400	690
Rated insulation voltage		V	690	1140
Rated impact withstand voltage		V	6000	10000
Rated working short circuit breaking ability		kA	18~100	10~75
Rated utmost short circuit breaking ability		kA	25~120	20~85
Rated frequency		Hz	50/60
Rated current		A	400,500,630,800,1000,1250,1600,2000,2500,3150,4000,5000,6300
Rated control power		V	AC 110/220/380,DC 110/220
Dimension (Unit:mm)	MNS/GCS/GGD	width	400,600,800,1000,1200
		depth	600,800,1000
		height	2200

 

LV Drawers are used for power distribution circuits and are relatively simple. As long as the molded case circuit breaker can be installed, the copper bars of the 630A high current power distribution drawer are easy to arrange. Copper bar connection is equivalent to fixing the plug in one position, which is not conducive to aligning the left and right positions of the contacts and may cause unilateral contact of the plug. Using double clamps can avoid unilateral contact of the plug caused by drawer deviation or additional force on the plug. The old B cabinet uses cable connections and requires multiple sets of plugs. In order to ensure that the drawer does not tilt back, there is also a positioning plug board on the upper part.

 

Burnout Fault and Countermeasures of MNS Low Voltage Drawer Switch Cabinet

 

MNS low-voltage drawer type switchgear is favored by many power engineering customers for its advantages such as convenient maintenance, multiple group outgoing circuits, and small footprint. Although there are many manufacturers in the field, there are varying levels of technical expertise and production volume. Many small and medium-sized switch factories, due to their weak technical foundation, do not have a grasp of the specifications and standards related to the machinery and equipment in the distribution room. There are risks in the design and installation of drawer cabinets and switch cabinets, coupled with poor customer operation and maintenance management, and the aging of components in the cabinets due to increased operating time, This will lead to a high incidence of high-voltage switchgear accidents and even major accidents such as burning damage.

1. Common faults experienced

On the morning of July 28, 2019, an MNS low-voltage drawer cabinet that was operating normally in a certain distribution room suddenly ignited and caught fire. In order to avoid the expansion of common faults, the on-site operation and maintenance management staff sucked the upper level 35kV power switch and carried out firefighting. However, the firefighting immediately did not cause the large-scale model to catch fire. It was determined that the open fire was the D28 feeder cabinet on the bottom pressure side, which was severely burned and had lost its operational function. The adjacent cabinets were not affected, and after extinguishing the fire, the key load funds were invested in the reserved route, and the funds were put into operation again.

After confirming with the on-site staff, the distribution room was fully funded and put into operation in 2005, and it operated normally during the period without any maintenance records. Before the fire alarm system came into being, the outgoing power switch and load of each team did not have the common fault, power tripping, power failure and large-scale startup and shutdown of machines and equipment (equipment). At the same time, the inspection of the operation record confirmed that the three-phase five wire switch Ammeter of each module was normal, and there was no load condition.

 

MNS low-voltage drawer cabinet is a key distribution equipment for the bottom pressure system software of the distribution room. Based on the expectation of this accident, the high-voltage switchgear manufacturer should attach great importance to it and strictly follow national industry standards for design, production, and installation. As a power engineering customer, regular maintenance, upkeep, and upkeep should also be carried out on the machinery and equipment to ensure the normal operation of the machinery and equipment together.

Calibration of MNS 1 module drawer cabinet power switch after shunt disconnection:

Drawer cabinet power switch

1. After the main power switch (molded case circuit breaker) in the outgoing module of the group was disconnected due to common faults, the actual operation organization's door handle was still in the "Å" (reclosing) position.

1. Above the module (drawer cabinet), the reclosing organization door handle (in the opposite direction) should be turned to the 45 ° RESET position at the bottom left corner, and then the door handle (clockwise) should be turned to the "○" (closed) position. At this point, the isolation switch returns to the normal suction position (in the case of hot standby) for calibration and actual operation.

2. The actual operation of reclosing can only be carried out after the calibration is carried out.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q5 : Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

 

Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.

 

Q7 : Can the price be negotiated?

A: Yes, the price is negotiable. It can be changed according to your quantity or package

 

Q8 : How about inspection?

A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.

 

Q9 : What is payment terms?

A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.

 

Q10 : What is the service offered by company?

A: We have the professional engineer team which can design and develop the mold to arrive different customer requirement.

We also have the sales team to offer good service from pre-sale to after-sale.

 

This product is usually customized.
We are a manufacturer and have a professional technical department that can design and provide solutions according to customer needs.
Please contact our sales personnel to obtain design drawings

Here are our customer examples for your reference

 

IF NEED MORE DETAILES,PLEASE FEEL FREE YO CONTACT US

 

Hot Tags: mns 50a withdrawable switchgear lv electrical panel board, China, manufacturers, suppliers, customized