AC Changeover Switch Rotary Isolator Switch

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AC Changeover Switch Rotary Isolator Switch 

•Current type: AC 50Hz
•Number of main contact: ON or OFF
•Frequency: 8 hour work/intermittent periodic duty,/h operating frequency is 30 times.
•Electrical life: 10,000 times/AC-23, 6,000 times/AC-3, auxiliary contacts for 2000 times.

AC Changeover Switch Rotary Isolator Switch Technical parameters

Type		FM30-25	FM30-32	FM30-40	FM30-63
Rated thermal current (Ith)	A	25	32	40	63
Rated working voltage(Ue)	V	240 440	240 440	240 440	240 440
Rating value(le/kW)
AC-21A	A/KW	20/-20/-	32/-32/-	40/-40/-	63/-63/-
AC-22A	a/kw	20/-20/-	32/-32/-	40/-40/-	63/-63/-
AC-23A	a/kw	15/4 15/7.5	22/5.5 22/11	30/7.5 30/7.5	43/11 43/22
AC-3	A/KW	11.7/3 11.7/5.5	15/4 15/7.5	22/7.5 22/11	36/11 36/18.5

Current type: AC 50Hz
Number of main contact: ON or OFF
Frequency: 8 hour work/intermittent periodic duty,/h operating frequency is 30 times.
Electrical life: 10,000 times/AC-23, 6,000 times/AC-3, auxiliary contacts for 2000 times.

AC Changeover Switch Rotary Isolator Switch Outline and mounting size

Type	Outline size					Mounting size
FM30-25(32)	D3	D4	H	B	K	A1	A2	B	D2
	Φ23	Φ19	82	85	160	150			Φ4.2
FM30-40(63)	Φ29	Φ23	93	100	190	178			Φ4.2

AC Isolator Selection - AC Changeover Switch Rotary Isolator Switch

♦AC Isolators are used in both stand-alone grid or network distributed systems. If connected to the distributed network then G83/1 stipulates the PV system must be connected directly to an isolation switch that is wired so as to isolate both the live and neutral conductors, capable of being secured in the “OFF” position and in an accessible location within the installation.

♦Unlike a DC isolator that is required to switch both the positive and negative conductors, an AC isolator should be chosen with regards to the supply being single phase, which is typically found in domestic installations or three phase, which is typical for commercial or industrial installations. Ideally for single phase a 2pole isolator should be used to switch the live and neutral line (earth constantly connected) whilst a 4pole isolator would be used to switch the 3 voltage lines and neutral (earth constantly connected).

♦The isolator rating should be based on the inverter output which is normally specified per phase, that is line to neutral, and for example maybe shown as 20A at 230VAC; if this output is from a three phase unit then the AC isolator must be rated to for the line-to-line voltage which would typically be 415VAC.

♦With both AC and DC isolators the ambient temperature of the environment in which the switch is mounted must be considered as most industrial switches are nominally rated for use in 35°C. However, if the isolator is to be used in an area where solar activity is prevalent,thereby making more efficient use of the installation and greater yield, or in an enclosed space such as a loft or that of an inverter enclosure,then an isolator capable of handling the elevated temperatures should be selected.