CURRENT TRANSFORMERS AST - Current transformers line Technical comments Versatility Modern design, versatility and greater safety are the distinctive features of Current transformers are frequently secured with the help of a lug through the new AST-Line. In developing we have moreover retained our reliable which a clamping screw fits onto the primary bar. You must have noticed what CELSA secondary terminal. a nuisance this lug can be, for instance when you want to install the CT behind fuse switch disconnectors, fuse trips or between bar overlaps and exits. Greater safety The new current transformer of the CELSA AST-Line have their own solution The joining point where the two halves of the housing meet inside the primary to this problem. The conventional fixing device has been designed with a bar opening is crucial to safety. Quite in accordance with CELSA´s motto - form-locking guide so that - if necessary - it can simply be pulled out. safety is built into our products - the two halves of the housing are not aligned with a butt joint, instead they are made to overlap in the new AST-Line. Insulated protective caps for primary fixing bolts Extended secondary terminal cover To protect against unintentional contact the bolts of the primary fixing devices When using the CT as a tube type CT you may wish to increase the air gaps can be covered by protective insulation caps. These should be pressed only and creepage distances between secondary terminals and primary bars. You on the already fastened bolts, not between bolts and bars. can do so by adding protective terminal covers over the CT openings on the front and back as shown. Celsa Messgerate España S.L. www.celsamessgerate-spain.com [email protected] / +34 96 130 93 78

CURRENT TRANSFORMERS AST - Current transformers line General Features Secondary terminal openings. Of course all AST current transformers comply with EN 60044, DIN VDE The connection of secondary wire leads to their corresponding terminals is normally done by sliding them into the rectangular openings on the front or the back. If this way of connection is prohibited for instance due to blocking when mounted right behind a line of fuses the secondary wire leads equipped General Mechanical Feature with clamps can also be introduced into the lateral slots for secondary termi- • unbreakable plastic...

CURRENT TRANSFORMERS ASTR21 - WINDOW CURRENT TRANSFORMER Round conductor: Accesories: • Mounting feet (2 pieces) General Mechanical Feature • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing Special executions (On request): • nickel-plated secondary terminals with plus minus screws (2 Nm) • Other ranges, classes or rated burden VA. • integrated secondary terminal caps General Electrical Features • rated frequency 50-60Hz (other frequencies on request) • class of insulation E (other classes on request) • rated short-time thermal current...

CURRENT TRANSFORMERS ASTMR21 - WINDOW CURRENT TRANSFORMER Round conductor: Accesories: • Mounting feet (2 pieces) General Mechanical Feature • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing Special executions (On request): • nickel-plated secondary terminals with plus minus screws (2 Nm) • Other ranges, classes or rated burden VA. • integrated secondary terminal caps General Electrical Features • rated frequency 50-60Hz (other frequencies on request) • class of insulation E (other classes on request) • rated short-time thermal current...

CURRENT TRANSFORMERS AST210s - WINDOW CURRENT TRANSFORMER Round conductor: Primary bar: Accesories (please indicate in the order): General Mechanical Feature • Mounting feet (2 pieces) • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing • primary fixing device • nickel-plated secondary terminals with plus minus screws (2 Nm) • integrated secondary terminal caps Special executions (On request): • Other ranges, classes or rated burden VA. General Electrical Features • rated frequency 50-60Hz (other frequencies on request) • class of insulation...

CURRENT TRANSFORMERS AST255s - WINDOW CURRENT TRANSFORMER Round conductor: Primary bar: Accesories (included in the delivery): • Mounting feet (2 pieces) General Mechanical Feature • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing Special executions (On request): • nickel-plated secondary terminals with plus minus screws (2 Nm) • Other ranges, classes or rated burden VA. • integrated secondary terminal caps General Electrical Features • rated frequency 50-60Hz (other frequencies on request) • class of insulation E (other classes on request)...

CURRENT TRANSFORMERS AST310s - WINDOW CURRENT TRANSFORMER Round conductor: Primary bar: Accesories (please indicate in the order): sec. 5 A / Rated burdens VA Class 0.5 2.5 3.75 3.75 5 General Mechanical Feature • Mounting feet (2 pieces) • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing • primary fixing device • nickel-plated secondary terminals with plus minus screws (2 Nm) • integrated secondary terminal caps Special executions (On request): • Other ranges, classes or rated burden VA. General Electrical Features • rated frequency 50-60Hz...

CURRENT TRANSFORMERS AST3R30 - WINDOW CURRENT TRANSFORMER Round conductor: Accesories: • Mounting feet (2 pieces) General Mechanical Feature • unbreakable plastic casing, polyamide • difficult to inflame, according to UL 94 V0 and selfextinguishing Special executions (On request): • nickel-plated secondary terminals with plus minus screws (2 Nm) • Other ranges, classes or rated burden VA. • integrated secondary terminal caps General Electrical Features • rated frequency 50-60Hz (other frequencies on request) • class of insulation E (other classes on request) • rated short-time thermal current...