Indoor AC high voltage vacuum load switchDetailed product description：

FZN-40.5D/T630-20 indoor AC high-voltage vacuum load switch and FZRN-40.5D/T630-31.5 indoor AC high-voltage vacuum load switch fuse combination (hereinafter referred to as: vacuum load switch) are designed specifically for 35KV box type substations and can also be used as independent electrical units in power systems (cabinet installation or wall installation).
This product has a small size, easy installation, and simple operation. Its structure is scientifically reasonable, its movements are flexible and reliable, and it has obvious isolation fractures. The load switch can achieve maintenance free operation, and the combination electrical appliance can be equipped with a series of pin type fuses, which are safe and convenient to replace.
2. Purpose
The FZN-40.5 series vacuum load switch is used in AC 50HZ networks with a rated voltage of 40.5KV, as a means of breaking load current, overload current, and short-circuit current. The operation mode has both manual and electric functions, especially suitable for places that require oil-free, maintenance free, and frequent operation.

3. Model Description
Model name
FZN-40.5/T630-20 Indoor AC High Voltage Vacuum Load Switch (630A; 1250A)
FZN-40.5D/T630-20 Indoor AC High Voltage Vacuum Load Switch with Grounding Switch (630A; 1250A)
FZRN-40.5/T630-31.5 Indoor AC High Voltage Vacuum Load Switch Fuse Combination Apparatus (6.3A-125A)
FZRN-40.5D/T630-31.5 Indoor AC High Voltage Vacuum Load Switch Fuse Combination with Grounding Switch (6.3A-125A)

Note: The insulator of the vacuum load switch can be equipped with a sensor with a live display.
4. Operating environment
A. Altitude not exceeding 1000m; 2000m; 3000m; 3500m (The user must specify the requirements when placing an order, and if not specified, the altitude is 1000m)
B. The ambient air temperature ranges from -25 ℃ to+40 ℃;
C. Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%; Water vapor pressure: daily average not exceeding 2.2kPa; The monthly average value does not exceed 1.8kPa;
D. The surrounding air is not significantly polluted by dust, smoke, corrosive or flammable gases, water vapor, or salt spray;
E. The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6KV;

5. Main technical parameters of FZN, FZRN-40.5D/T630 indoor AC high-voltage vacuum load switch
5.1 Electrical Performance Parameter Table (see: Table 1) (Table 1)

serial number	project	unit	load switch	combined electrical apparatus	grounding switch
one	rated voltage	KV	forty point five	forty point five	forty point five
two	rated current	A	1250 630	sixty-three	--
three	rated frequency	HZ	fifty	fifty	fifty
four	Rated short-circuit breaking current	KA	--	thirty-one point five	--
five	Rated line charging interruption current	A	two point one	two point one	--
six	Rated ground fault breaking current	A	sixty-three	sixty-three	--
seven	Rated short-circuit closing current	KA	fifty	--	--
eight	Rated peak withstand current	KA	fifty	--	fifty
nine	Rated short-time withstand current/duration	KA	20/4	--	20/2
ten	Rated breaking transfer (handover) current	A	--	one thousand and seven hundred	--
eleven	Rated Active load breaking current	A	1250 630	--	--
twelve	Rated closed-loop breaking current	A	1250 630	--	--
thirteen	Rated cable charging current	A	twenty-one	twenty-one	--
fourteen	Rated voltage for secondary circuit operation	V	AC/DC220、110
fifteen	1-minute power frequency withstand voltage (effective value) to ground, phase to phase, vacuum break/isolation break	KV	95/118
sixteen	Full wave lightning impulse withstand voltage (peak) to ground, phase to phase, vacuum break/isolation break	KV	185/215
seventeen	main circuit resistance	μΩ	≤ 120 (except for fuses)
eighteen	mechanical life	time	five thousand	two thousand	two thousand
nineteen	Maximum/minimum energy storage and closing operation voltage	V	AC 242/187
twenty	Maximum/minimum voltage for opening operation		AC 264/143
twenty-one	Switch level		M2/E2	M1	M1/E0

5.2 Mechanical performance parameters (see: Table 2) (Table 2)

serial number	project	unit	Vacuum arc extinguishing chamber	Isolation knife switch	grounding knife switch
one	contact gap	mm	17±1	≥350	--
two	Contact overtravel	mm	4±1	--	--
three	Average opening speed	M/s	1.6±0.2	--	--
four	Average closing speed	M/s	0.8±0.2	--	--
five	Three pole opening and closing are not synchronized	ms	≤2	≤3mm	--
six	Rated closing bounce time	ms	≤2	--	--
seven	Center distance between poles	mm	410+2	410+2	410+2
	Opening and closing operation force	N	two hundred

5.3 Electric parameters of spring operated mechanism. See: Tables 3 and 4

Magnetic single-phase DC energy storage motor (Table 3)

model	rated voltage	Rated output power	Normal operating voltage range
ZYJ220-53	AC/DC220V	≤70W	85% -110% rated voltage

Opening electromagnet (independent power supply) (Table 4)

Rated working voltage (V)	AC220	AC110	DC220
Rated working current (A)	two point six seven	two point nine three	two
Rated electrical power (W)	< 587	< 312	four hundred and forty
Coil resistance value at 20 ℃ (Ω)	30±3	18±1.7	58±10
Normal operating voltage range	65% -120% rated working voltage reliable tripping; Do not disconnect when the rated operating voltage is less than 30%

6.1 Basic Structure

6.1.1 This combination electrical device is a three pole linkage structure. It mainly consists of a frame, a vacuum arc extinguishing chamber, an isolation knife switch, a fuse, a grounding knife switch, a trip transmission device, and a spring operating mechanism. The isolation knife switch and vacuum arc extinguishing chamber are fixed to the frame through insulators, and the fuse is installed on the back of the isolation knife switch. The grounding knife switch spindle is directly installed at the lower part of the frame. The spring operating mechanism is installed on the left side panel of the frame, and the operation mode is side operation. The operating mechanism drives the switch spindle, which rotates and uses a crank arm to drive the vacuum arc extinguishing chamber or isolation knife switch through an insulated operating rod, achieving the operation of opening and closing. The grounding knife switch and the isolation knife switch are connected together through a transmission link, and the two are interlocked during operation.