Automatic Transfer Switch ATS S3M250-220/4

PC-Class change-over switch

Dual power supply design: power supply A (main) and power supply B (standby)

Supports AC systems with a rated current of 160 A to 250 A

Monitoring: Three-phase sampling

Transfer Positions: Three-position (A-0-B)

Firefighting Interlock Function

Compliance with lEC 60947-6-1:2021

Main Specification

Model No.	S3M250-220/4
	TSE class	PC-Class
	Single-phase rated voltage (phase-to-neutral) (AC)	230V
	Rated operational voltage (phase-to-phase) (AC) U_e	400V
	Case grade	250A
	Rated operational current I_e	250A
	Rated insulation voltage (main circuit) U_i	800V
	Rated impulse withstand voltage (main circuit) U_imp	8KV
	Rated insulation voltage (control circuit) U_i	690V
	Rated impulse withstand voltage (control circuit) U_imp	4KV
	Rated short-time withstand current I_cw	10kA / 30ms
	Rated short-circuit making capacity I_cm	17kA
	Automatic switching time (A to B)	≤ 200ms
Load disconnect time	≤ 100ms
Pole number	4P
Usage category	AC-33iB