Pole-mounted Load Breaker Switch FKW-12/24/36

RTS type Outdoor on load break switch (switch disconnector) contained in this list are destined to

switch stub lines and ring main lines or transformers( It can be equipped with MV HRC fuse links

as short circuit protection function) or for switching under on load conditions.

product details

product description

General

FKW type Outdoor on load break switch (switch disconnector) contained in this list are destined to

switch stub lines and ring main lines or transformers( It can be equipped with MV HRC fuse links

as short circuit protection function) or for switching under on load conditions.

FKW type switch comply with IEC/IEEE and DVE-recommendation standards. Especially comply

with DIN VDE 0670 part 3 and IEC publication IEC-60265, IEC-129.

Service environment

a) Air temperature: Maximum temperature: +75℃; Minimum temperature:-45℃

b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .

c) Altitude above sea level: Maximum installation altitude: 2500m

d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.

e) No frequent violent shake

Features and benefits

• Compact design• All steel parts either in stainless steel or hot-dip galvanized • Solid and stable base frame • Main contact with icing protection • Insulators available in porcelain or alternatively in silicone • Minimal sag for the line-connection thanks to the two fixed terminals • Completely maintenance antirust AL alloy -Arc chamber • Switching-off procedure without external arc • Short circuit making capacity under specific conditions possible • Fixing on the supporting structure either by clamping (free setting) or screwing (holes in the base frame) • Easy on-site installation and setting • High reliability: up to 1’000 cycles (depending on the making current) • All conducting parts either silver, nickel or tin-plated • Practically maintenance-free

• Practically maintenance-free

Main technical specifications

Sheet 1

No.	Item		Unit	Data
1	Rated voltage		kV	12	24	36
2	Rated frequency		Hz	50/60
3	Rated current		A	200/400/630
4	Rated short circuit withstand current ( 1S)		kA	20
5	Rated peak withstand current ( 1S)		kA	50
6	Rated making current		kA	31.5-50
7	Rated insulation level(HV)	lightning impulse	kV	75/85	125/ 145	170/ 195
7	Rated insulation level(HV)	Power frequency withstand	kV	45	55/75	75/ 100
8	Rated short circuit breaking capacity cos. Φ（0.7） Without maintenance of contacts			------------------------------
	- for active circuits	20 breakings	A	630	630	400
		30 breakings		400	400	300
		40 breakings		300	300	250
		50 breakings		250	250	170
		75 breakings		170	170	160
		120 breakings		110	110	110
		200 breakings		65	65	65
		280 breakings		50	50	50

Sheet 2

No.	Item	Unit	Data
1	Rated voltage	kV	12	24	36
9	For ring circuits breaking capacity	A	630	400	250
10	Rated breaking capacity of transformer	A	50
11	Rated breaking capacity of cable charging	A	11
12	Rated breaking capacity of earthing fault	A	56

Note: The FKW type on load break switch (Switch disconnector) is equipped with stored energy released by fuse strike pins. The stored energy mechanism for the opening operation is released by fuse strike pins. The trip actuator is mounted on top of the fuse contact clip.

The DIN type fuse is held in spring type contacts, secured by a tail lever. All the components are made of stainless steel, to prevent corrosion, have long live, and in the reset position. The trip lever is parked in an over-centre position.

Drawing and dimension

kV	A	B	C	D	E	F	G	H	I	J	L	M	Y
12	400	1150	300	150	1150	1010	480	450	1060	500	450	750	1250
24	450	1220	325	150	1150	1110	630	450	1160	543	450	775	1350
36	700	1400	400	170	1400	1610	725	600	1660	560	550	850	1650