SW120-Series-Catalogue-Electronic-Issue-small-size
4Pages

SW120, SW121, SW122 AND SW132 DOUBLE POLE D.C. CONTACTORS SW120 On/off normally open normally open UNIQUE RANGE SW120 DOUBLE POLE ON/OFF Normally open SW121 DOUBLE POLE CHANGEOVER SW122 PAIRED DOUBLE POLE ON/OFF Normally open (for motor reversing) These contactors have been designed for direct current loads. They have double breaking main contacts with silver alloy contact tips which are weld resistant, hard wearing and have excellent conductivity. resistors and are intended for continuous energisation with minimum coil power consumption. ALTERNATING CURRENTS These contactors are not polarity sensitive thus they can be used for switching A.C. currents. COMPACT SIZE SPECIAL VERSIONS SW132 DOUBLE POLE ON/OFF Normally closed Two special versions, SW121E and SW132E, are designed for mains failure changeover duty. These contactors are fitted with economy The contactors are compact in size and are fully serviceable and a full range of spare parts are available. Continued on page 3

M8 main terminals coi) to be tightened within connections 18 .16 the range 8.1 to 9.3 Nm Optional barriers can be fitted here S.RD.T. microswitch auxiliary klI- contact can be fitted each end

SW122 WITH INTEGRAL BRACKET AND LINKSCOIL TERMINALS Coil connections are by means of 6mm spade terminals and two are supplied per terminal. Mounting is by means of 5mm tapped holes in the switch frame together with a range of mounting brackets complete with screws and washers. Contactor type SW122 is supplied as an assembly which includes a mounting bracket as a standard feature and includes copper links across the main terminals. The contactors can be mounted either horizontally or vertically. If mounted vertically the normally open main terminals should point upwards and the normally...

Thermal currant rating (100%): Normally open contacts (all types) 125 Amperes Normally closed contacts (standard types) 100 Amperes Normally closed contacts (“Eh types) 125 Amperes Typical coil power dissipation: Intermittently rated types 15-25 Watts Continuously rated types 7-12 Watts Intermittent current ratings for all contractors: Mechanical life: Greater than 3 million operations Typical fault current which can be ruptured (Sms time constant): All switches 100 Amperes at BOV D.C. Typical voltage drop across contacts: All switches 40mV per 100 Amperes per pole...