JN22-40.5/31.5 Indoor High Voltage 3-phase Grounding Knife 35kV Earthing Switch Protection Switch

JN22-40.5/31.5 Indoor High Voltage 3-phase Grounding Knife 35kV Earthing Switch Protection Switch

• Specification
• Technical Parameters

• JN22-40.5/31.5 Indoor High Voltage 3-phase Grounding Knife 35kV Earthing Switch Protection Switch

  JN22-40.5/31.5 indoor AC high voltage disconnect switch is an advanced level product with high tech parameters performance. After comprehensive evaluation, it conforms to GB1985 AC HV disconnect switch and earthing switch, applies to power system of 40.5kV and AC 50Hz. Can be used with KYN61-40.5 and other types high voltage switchgear, also play a protective role in the high-voltage electrical equipment overhaul.

  Main structure of earthing switch: bracket, grounding knife assembly, static contact, sensor, shaft, arm, compression spring, conductive sleeve, soft connection. The bracket is bent by a thin steel plate and welded into parts, and the rest are assembled parts.

  Ambient condition
  1. Altitude: ≤1000m
  2. Ambient temperature: -10°C~+40°C
  3. Earthquake intensity: ≤8 degree
  4. Pollution level: II
  5. Relative humidity: Daily average≤95%, monthly average≤90%

  Working principle 

  a. When the operating mechanism is used to close the grounding switch, the torque acts as a torque to overcome the resistance torque, and the rotating arm rotates in the closing direction, and the operating lever on the grounding knife passes the compression spring to release the point, and the compression spring releases the energy. Make the grounding switch close quickly, in the closing position. The grounding knife on the grounding knife assembly is firmly and reliably contacted by the flange portion of the disc spring and the stationary contact.
  b. During the opening operation, the acting torque causes the main shaft to overcome the main torque and the spring force, and drives the arm to rotate in the opening direction, and the grounding knife compression spring passes the dead point, and the compression spring energy storage ends, so as to prepare for the next closing.
  c. The grounding switch and closing speed are independent of the operating speed of the person.

• JN22-40.5/31.5 Indoor High Voltage 3-phase Grounding Knife 35kV Earthing Switch Protection Switch

  Item		Unit	Data
  Rated voltage		kV	35
  Maximum voltage		kV	40.5
  Rated short-time withstand current		kA	31.5
  Rated short-circuit duration		s	4
  Rated short-circuit making current		kA	80
  Rated peak withstand current		kA	80
  Phases center distance		mm	280,300,350,400
  Rated insulation level	PF withstand voltage (1 min)	kV	Phase to earth	95
  	Lightning impulse withstand voltage		Phase to phase	185

   

  Dimensional drawing

  

  B	H	L
  280	750	1180
  300	790	1180
  350	890	1280
  400	990	1374

   

  About us

  We are specialty on epoxy resin medium voltage and high voltage components, such as 12KV, 24 KV, 36KV and 40.5KV switchgear bushing, contactor box, insulators, indoor high voltage disconnect switch, transducers. 630A, 1250A, 2500A, 3150A and 4000A contactor box, club contact, fix contact, arm contact and jaw contact. 630A and 1250A VS1 circuit breaker. 630A and 1250A  ZN85-40.5 circuit breaker. 12KV and 24KV earth switch. KYN28A-12 and KYN61 high voltage switchgear components!

  We will give you best quality and price!

   

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