MZD66-12/40 Indoor high-voltage grounding switchDetailed product description：

The MZD66-12/40 (prototype number JN15-12/40) indoor high-voltage grounding switch is a new type of grounding switch designed and developed by our company based on the ES1 grounding switch prototype, which has international advanced level. The structural form is a combination type, and its performance meets the requirements of GB1985-89 "AC High Voltage Isolating Switches and Grounding Switches" and EC129. It is suitable for indoor 3-10 kV three-phase AC 50 (60) Hz power systems; It has a certain closing ability to protect other electrical equipment inside the switchgear from damage, and can be used in conjunction with various high-voltage switchgear as grounding protection during maintenance of high-voltage electrical equipment.

Structural characteristics:
Advanced design, indoor load switch; Simple structure, easy installation and adjustment; Having the ability to quickly separate and merge; Surrounding air temperature: upper limit+40 ℃, lower limit -10 ℃; Altitude: not exceeding 1000 meters; Humidity conditions: The average daily relative humidity should not exceed 95%, and the average monthly relative humidity should not exceed 90%; Seismic intensity: not exceeding 8 degrees; Pollution level: Level II.

MZD66-12 indoor high-voltage grounding switch model meaning


Main technical parameters of MZD66-12 indoor high-voltage grounding switch

project		unit	data
rated voltage		KV	twelve
Rated short-time withstand current (thermal stability)		KV	forty
Rated short-circuit duration		S	four
Rated short-circuit closing current		KA	one hundred
Rated peak withstand current (dynamic stability)		KA	one hundred
Rated insulation level	Rated short-time power frequency withstand voltage	KV	Relatively and alternately	forty-two
	Rated lightning impulse withstand voltage			seventy-five
mechanical life		time	two thousand

MZD66-12 Indoor High Voltage Grounding Switch Dimensions and Installation Dimensions

Copper bar wiring terminal diagram

Installation Hole Diagram

Product Model	E	F	G	H	D
MZD66-12/40-210	two hundred and ten	fifty	one hundred and eighty-five	six hundred and fifty-five	five hundred and sixteen
MZD66-12/40-220	two hundred and twenty	fifty	one hundred and eighty-five	six hundred and seventy-five	five hundred and thirty-six
MZD66-12/40-230	two hundred and thirty	fifty	eighty-five	six hundred and ninety-five	five hundred and fifty-six
MZD66-12/40-250	two hundred and fifty	fifty	one hundred and eighty-five	seven hundred and thirty-five	five hundred and ninety-six
MZD66-12/40-275	two hundred and seventy-five	fifty	two hundred and ten	eight hundred and ten	six hundred and forty-six