ST - C.T.`s line Technical comments Modern design, versatility and increased safety are the distinctive features of the new STline. In developing the new series we have moreover retained our reliable CELS secondary terminal. Increased Safety The joining point where the two halves of the housing meet inside the primary bar opening is crucial to safety. Quite in accordance with CELS s motto - 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 ST line. Versatility Current transformers are frequently secured with the help of a lug through which a clamping screw fits onto the primary bar. You must have noticed what a nuisance this lug can be, for instance when you want to install the c.t. behind fuse switch disconnectors, fuse trips or between bar overlaps and exits. The new current transformer of the CELS ST line have their own solution on this problem. The conventional fixing device has been designed with a form-locking guide so that - if necessary - it can simply be pulled out. Section - Overlapping Insulated Protective Caps for Primary Fixing Bolts To protect against unintentional contact the bolts of the primary fixing devices can be covered by protective insulation caps. These may either be pressed on the already fastened bolts or be put between bolts and primary copper bars before the mounting is done. Sekundäranschlusszuführungen Secondary Terminal Openings 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. 2
Extended Secondary Terminal Cover When using the c.t. as a tube type c.t. you may wish to increase the air gaps and creepage distances between secondary terminals and primary bars. You can do so by adding protective terminal covers over the c.t. openings on the front and back as shown. Die CELS-Sekundärklemme The CELS Secondary Terminal In this clamping system pressure is transmitted by means of a nut (pad) to the ends of the conductor (lift principle). The conductor is therefore loaded only under pressure and cannot be demaged by rotating components. When opened, there are two clamping spaces of 2. mm x 4 mm each in cross-section. Thanks to our clamping system the ends of the conductors are clamped over a wide area which ensures lower contact resistance. Pressure forces of several hundred Newtons are reached. In this way conductors even with multiple, fine and extremely fine wires are so well compressed that no harmful gases can penetrate to cause corrosion. It therefore provides an extremely longlasting connection even in aggressive industrial environment. The plus-minus slot of the M (0. Nm) screws allows easy of handling. t the ST line both, screws and nuts are designed in such a way to prevent unintentional loosening. The secondary terminals are made of brass with nickel as a double terminal construction. This double construction permits a very easy short circuit of the current transformer during operation in order to carry out work on the secondary circuit. General Features Of course all CELS Messgeraete GmbH manufactured current transformers comply with IEC 1 8, IEC 44-1, DIN VDE 0414 part, harmonization document HD 33 S2, VDE 00, DIN 42 as well as the regulations VBG 4. VDE 06 part 0. General Mechanical Features: - unbreakable plastic casing - difficult to inflame, according to UL 94 VO and selfextinguishing - nickel-plated secondary terminals with plus minus screws (0. Nm) - integrated secondary terminal caps General Electrical Features - rated frequency 0-60 Hz (other frequencies on reques) - class of insulation E (other classes on reques) - rated short-time thermal current lth = 60. IN - nominal surge current Idyn = 2.. lth, minimum - 0 k at all window type c.t.`s - highest voltage for equipment Um = 0.72 kv (other voltages on request) - rated power-frequency withstand voltage 4 kv / 1 min (other voltages on request) - instrument security factor FS or FS ll CELS current transformers are dimensioned (exceptionell marked types) in accordance with VDE 0414 for a rated continuous thermal current of ID = 1.2. IN ccessories Included in delivery: - secondary terminal covers - primary fixing device - mounting feet CURRENT TRNSFORMERS 06 Optional: - cost-effective snap-on mounting brackets made of highly reinforced fibre glass macrolon for snapping on a profile mounting bar according to EN 0022-3 and DIN 46277 - copper tubes in various sizes for using a current transformer as a tube type current transformer - copper primary bars in various sizes - insulated protective caps for primary fixing bolts - protective terminal covers to increase the air gaps and creepage distances if using the c.t. as tube type c.t. 3
STR21 WINDOW or TUBE TYPE CURRENT TRNSFORMER Ø 21mm STR21 Technical Features Primary Rated Current lpn 1) 0 60 7 80 0 12 0 0 00 Class 0. Class 1 sec. sec. 1,2 1,2 1,2 1, 2, 2, 2, 2, 1,2 1, 2, 2, 2, 2,0 3,7 3,7 3,7 2, 3,7 7, 7, 7, 7, 7, 7, 7, 7, 7, ccessories (included in delivery): Optional accessories - Snap-on mounting bracket for profile mounting bar to EN 0022-3 - Copper tube (do = 21 mm, di = 8. mm or 12. mm) 1) for using the c.t. as tube type current transformer - Protective terminal covers to increase the air gaps and creepage distances if using the c.t. as tube type c.t. 4
ST31 Primary bar 0 60 7 80 0 12 0 0 00 70 Ø 28 mm WINDOW TYPE CURRENT TRNSFORMER x 1 mm 23 x 23 mm ST31 Technical Features 1,2 1,2 2, 3,7 7, 1 1 Class 0. Class 1 sec. 3,7 7, 1,2 1,2 2, 2, 2, 3,7 7, 1 sec. 1,2 2) 1,2 1, 2 2, 3,7 7, 1 1 CURRENT TRNSFORMERS 06 2) class 3 ccessories (included in delivery): Optional accessories - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 - Copper tube (do = 21 mm, di = 8. mm) 1) for using the c.t. as tube type current transformer - Protective terminal cover to increase the air gaps and creepage distances if using the c.t. as tube type c.t.
ST412.6 WINDOW TYPE CURRENT TRNSFORMER Primary bar Ø 33 mm 40 x 13 mm 2 x x mm ST412.6 Technical Features 0 12 0 0 00 70 00 2) class 3 1,2 2, 3,7 2, 3,7 Class 0. Class 1 sec. 1,2 2, 2, 3,7 2, 2, 2, 1,2 2) 1,2 2, 3,7 2, 3,7 3,7 3,7 sec. 1,2 2, 2, 3,7 1,2 3,7 3,7 ccessories (included in delivery): - 2 pcs. secondary ferminal covers (yellow caps) - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 6
ST412 Primary bar 0 60 7 80 0 12 0 0 00 70 00 Ø 33 mm 40 x 13 mm 2 x x mm ST412 Technical Features WINDOW TYPE CURRENT TRNSFORMER Secondary tabs (2 or 3 change-over funcitons) 1,2 2, 3,7 7, 1 Class 0. Class 1 sec. 1,2 2, 3,7 7, 1 1,2 2) 1,2 2) 1,2 1,2 2, 3,7 7, 7, 7, 1 1 sec. 1,2 2) 1,2 2) 1,2 1,2 2, 3,7 7, 7, 7, 1 1 CURRENT TRNSFORMERS 06 2) class 3 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 7
ST12.7 WINDOW TYPE CURRENT TRNSFORMER Primary bar Ø 42 mm 0 x 13 mm 2 x 40 x mm ST12.7 Technical Features Primary Rated Current lpn1 ) 12 0 0 00 70 00 2) class 3 rated brudens V 1,2 1,2 1,2 2, 1,2 2, 2, 2, 3,7 Class 0. Class 1 sec. 1,2 1,2 1,2 2, 1,2 2, 2, 2, 3,7 1,2 2) 1,2 1,2 2, 2, 1,2 2, 2, 2, 3,7 sec. 1,2 2) 1,2 1,2 2, 2, 1,2 2, 2, 2, 3,7 ccessories (included in delivery): - 2 pcs. secondary terminal covers Optional accessories - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 - Copper tube (do = 21 mm, di = 8. mm or 12. mm)1) for using the c.t. as tube type current transformer - Protective terminal cover to increase the air gaps and creepage distances if using the c.t. as tube type c.t. 8
ST12 Primary bar 0 12 0 0 00 70 00 1 0 Ø 42 mm 0 x 13 mm 2 x 40 x mm ST12 Technical Features WINDOW TYPE CURRENT TRNSFORMER 1,2 7, 1 1 1 1 1 1 Class 0. Class 1 sec. 1,2 7, 1 1 1 1 1 1 1,2 2, 3,7 7, 1 1 sec. 1,2 2, 3,7 7, 1 1 CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 - Copper tube (do = 21 mm, di = 8. mm or 12. mm)1) for using the c.t. as tube type current transformer - Protective terminal cover to increase the air gaps and creepage distances if using the c.t. as tube type c.t. 9
ST61.8 WINDOW TYPE CURRENT TRNSFORMER Primary bar Ø 2 mm 60 x 1 mm 2 x 0 x mm 40 x 40 mm ST61.8 Technical Features Class 0. Class 1 sec. sec. 0 12 0 2, 2, 1,2 1,2 2, 2, 0 1,2 1,2 2, 2, 1,2 2, 2, 2, 00 2, 3,7 2, 2, 70 2, 1 3,7 1 00 2, 1 3,7 1 1 0 1 1 1 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 2
ST61 Primary bar 0 0 00 70 00 1 0 1 00 0 Ø 3 mm 60 x 1 mm 2 x 0 x mm 40 x 40 mm ST61 Technical Features WINDOW TYPE CURRENT TRNSFORMER 2, 2, 7, 1 1 1 1 Class 0. Class 1 sec. 2, 3,7 7, 1 1 3,7 7, 1 1 1 1 sec. 3,7 1 CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 211
ST640 WINDOW TYPE CURRENT TRNSFORMER Primary bar Ø 61 mm 60 x 40 mm 0 x 0 mm ST640 Technical Features Class 0. Class 1 sec. sec. 0 3,7 3,7 2, 2, 3,7 0 2, 2, 7, 7, 00 7, 7, 7, 7, 7, 70 7, 7, 7, 7, 00 7, 1 1 0 2, 1 1 1 00 1 1 1)other values upon request ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 212
ST81 Primary bar Primary Rated Current lpn1 ) 00 70 00 1 0 1 00 0 Ø 61 mm 80 x 1 mm 2 x 60 x mm 3 x 0 x mm ST81 Technical Features WINDOW TYPE CURRENT TRNSFORMER 2, 7, 1 1 Class 0. Class 1 sec. 1 1 1 1 7, 1 1 2 sec. 7, 1 1 1 CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 213
ST8 WINDOW TYPE CURRENT TRNSFORMER Ø 70 mm Primary bar 2 x 80 x mm 60 x 60 mm ST8 Technical Features Class 0. Class 1 sec. sec. 00 2, 7, 7, 7, 70 2, 7, 7, 7, 7, 7, 00 1 1 2, 0 1 1 1 1 00 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 214
ST 70 00 1 0 1 00 0 00 0 Ø 8 mm WINDOW TYPE CURRENT TRNSFORMER Primary bar 2 x 0 x mm 80 x 64 mm ST Technical Features 1 1 1 1 Class 0. Class 1 sec. 1 1 1 2 2 1 1 1 1 2 sec. 1 1 1 2 CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 21
ST6 WINDOW TYPE CURRENT TRNSFORMER Primary bar 3 x 0 x 12 mm ST6 Technical Features Class 0. Class 1 sec. sec. 00 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 00 1 1 2 0 2 00 2 3 0 0 2 1) other values upon reequest ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 216
ST1234 00 70 00 1 0 1 00 0 00 0 Ø 96 mm WINDOW TYPE CURRENT TRNSFORMER Primary bar 2 x 1 x mm 3 x 0 x mm 80 x 80 mm ST1234 Technical Features Certifiable design for tariff metering 1 4 Class 0. Class 1 sec. 1 1 4 4 4 1 1 4 4 sec. 1 4 4 4 4 CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 217
ST1272 WINDOW TYPE CURRENT TRNSFORMER Secndary tabs (2 or 3 change-over functions) Primary bar 4 x 1 x mm ST1272 Technical Features Class 0. Class 1 sec. sec. 00 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 00 1 1 1 1 0 1 1 1 00 1 0 000 0 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 218
WST40 WST40 Technical Features 1 2 2, 4 6 7, 12, 1 2 40 WOUND PRIMRY CURRENT TRNSFORMER Class 0. Class 1 sec. sec. CURRENT TRNSFORMERS 06 ccessories (included in delivery): - Snap-on mounting bracket for DIN-rail mounting bar to EN 0022-3 219