High Voltage Electric Components - High Voltage Vacuum Load Switch

Outdoor Pole Mounted High Voltage Vacuum Load Switch

Outdoor Pole Mounted High Voltage Vacuum Load Switch

Introduction: High Voltage Vacuum Load Switch [Vacuum Circuit Breaker]
MZF31-40.5/T1250-25 Outdoor Pole Mounted High Voltage Vacuum Load Switch is a new generation of high voltage electrical equipment which integrates domestic and foreign advanced technology and has experienced strict pattern test and long term operation examination. All technical performances have achieved GB3804 and IEC standards. This product is mainly designed for urban and rural network construction and transformation. It is applied to rated voltage 12 KV three-phase AC 50Hz power supply network. Its chassis adopts stainless steel materials and hot galvanized with anti-ultraviolet protection coating, which guarantees the normal operation at the outside. Its components are made of stainless materials which assure the endurance, stability and water-proof, salt-proof performances of the load switch. It has such outstanding features as small volume, light weight, pleasing appearance, easy operation, high parameter, strong opening and closing ability, safe, reliable, long electric life span, obvious fracture. It is of single pole manual operation as well as electrical, remote control operation.
Environmental Conditions - High Voltage Vacuum Load Switch
1. Environmental temperature: +40°C~-30°C(minimum -45°C is allowed for the special requirement made by the user.)
2. Altitude: Lower than 1000m, 2000m, 3000m；
3. Wind Pressure: No more than 700 Pa (equal to wind speed of 34 m / s)
4. Anti-filthy-capacity: Ⅳ
5. No regular dramatic shake, earthquake intensity < 8°
Model Meaning

Main Technical Parameters - High Voltage Vacuum Load Switch [Electrical Switch] Table One
Order Name Unit Parameter
1 Rated voltage kv 40.5
2 Rated frequency Hz 50
3 Rated current A 1250
4 Rated load breaking current A 1250
5 Rated closed loop breaking current A 1250
6 5%rated load breaking current A 62.5
7 Rated cable charged breaking current A 25
8 1 min work frequency voltage tolerance: vacuum fracture/ alternated, towards the ground/isolated fracture A 95/110
9 Lightening impact voltage tolerance: alternated/towards the ground/isolate fracture KV 185/215
10 Rated short term current tolerance (thermal stable) KV 25
11 Rated short term continued current KV 4
12 Rated peak value current tolerance (dynamic stable) S 63
13 Rated short circuit closing current KA 63
14 Mechanical life span KA 10000
15 Vacuum arc chamber contact allowed accumulated attrition thickness Times 0.6
16 Manual operation torque Mm ≤300
17 Weight Kg 500
Mechanical Features - Table Two

order		 Name Unit Parameter
1 Contact openness size Mm 13±1
2 Average Switch opening time M/s 1.4±0.2
3 Different periods of three-phase opening switch Ms ≤5
4 Different periods of three-phase closing switch Ms ≤2
5 Distances of charged objects and towards the ground Mm ≥420
6 Auxiliary circuit resistance μΩ 400≥R≤1000

Technical adjustment parameters in isolation


order		 Name Unit Parameter
1 Pressure of the isolated knife N 500±50
2 The distance between the final separation point of the contact knife and the static contact small fracture/ large fracture Mm ≥180/420
3 Resistance of the wire access and outlet terminals μΩ ≤150
Contour and Installation Dimension - High Voltage Vacuum Load Switch

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