1. Catalogs
  2. Crompton Instruments
  3. Current Transformers

Current Transformers

Current Transformers
1 / 22 PagesView full catalog

Current Transformers

Product catalog summary
Overview: The document details the Crompton Instruments Ebony Series and other current transformers, highlighting their design for measuring and protection applications. These transformers comply with EN 60044 standards and offer various system current ratings and case sizes.
Specifications: The transformers feature a ratio rating from 1/5 to 6000/5 with accuracy up to class 0.5. They support system voltages up to 720V and can withstand a test voltage of 3kV for 1 minute. They operate at a frequency of 50/60Hz and can handle short circuit thermal currents of 60 times the rated primary current for 1 second. The overload withstand capacity is 1.2 times the rated current continuously.
Construction: These transformers have a toroidal core and secondary winding encapsulated in a self-extinguishing polycarbonate case, providing mechanical strength and electrical insulation. The material is halogen-free, and the design includes integral covered secondary terminals with IP20B protection and an enclosure protected to IP40.
Installation Options: Installation methods include plug-in metal feet for wall or base mounting, plastic DIN-rail clips, moulded busbar mounting, primary copper busbar mounting, and multi-busbar mounting.
Features and Benefits: The transformers offer a variety of apertures and case sizes, facilitating metering and ensuring longevity. They are approved under BS EN 61010-1, EN 60044-1, and UL Recognized file no: E257877 for specific models.
Model Ranges: Models such as M53Q, M55E, M53J, M65F, M63N, MA5G, MA5Y, M93L, M93S, M93R, MB5D, MB5Z, MD5T, MC5T, S95P, and S97P are available, each with specific case sizes, apertures, weights, and ordering codes. They offer different ratio ranges and VA ratings at Class 3, Class 1, and Class 0.5.
Applications: Suitable for switchgear, distribution systems, generator sets, and control applications, these transformers provide high-quality measurements and faster installation.
SC Series Split Core Current Transformers: These models offer varying current ratios and burdens, with accuracy classes from 0.5 to 3, designed for easy installation with foot mounting. Applications include switchgear, distribution systems, and control panels.
MR Series Current Transformers: Known for comprehensive measuring accuracy, these transformers support a range of primary current ratings with accuracy classes up to 0.5. They feature high-quality construction and foot mounting, suitable for high primary currents.
DB Series Tape Wound Current Transformers: Designed for a wide range of primary currents with 5A secondary outputs, these transformers comply with IEC standards and are used in switchgear and generator sets.
CBT-94F Core Balanced Current Transformers: These are used with earth leakage protection relays to detect dangerous earth fault currents, featuring a sensitive toroidal core and flame retardant case, suitable for motor and transformer protection.
General Specifications: The transformers support system voltages up to 720V, a test voltage of 3kV for 1 minute, and operate within a temperature range of -20°C to +70°C. They comply with international standards such as IEC and VDE.
See more

Catalog excerpts

Current Transformers-1

Crompton Instruments Ebony Current Transformers Energy Division

 Open the catalog to page 1
Current Transformers-2

Consult factory for availability and lead time on 1A secondary. 1 Moulded Case Current Transformers Ebony Series Measuring and Protection The range of Crompton Instruments Ebony current transformers offers wide system current ratings, apertures, busbar and case sizes to suit every application. Manufactured to meet EN 60044 the range benefits include ratio rating from 1/5 to 6000/5, accuracy up to class 0.5, integral terminal cover for safety and multiple mounting options. Construction The toroidal core and secondary winding is encapsulated by a self-extinguishing polycarbonate moulded case cover...

 Open the catalog to page 2
Current Transformers-3

2 Consult factory for availability and lead time on 1A secondary. M53Q Range Case Size: 45mm wide x 30mm deep x 65mm high 1.8" wide x 1.2" deep x 2.5" high Aperture: 20 x 6mm and 21mm diameter 0.8" x 0.2" and 0.8" diameter Weight: 0.25kg Ordering Codes M53Q Add suffix to depict required ratio range. For example: M53Q-50/5 M30-DINCLIP DIN-rail mounting clip for DIN-rail mounting option (2 required) Model type Ratio range VA at Class 3 VA at Class 1 M55E 30/5 1.25 - M55E 40/5 2.5 - M55E 50/5 2.5 - M55E 60/5 3.75 2.5 M55E 75/5 5 3.75 M55E 80/5 5 3.75 M55E 100/5 7.5 5 M55E Range Case Size: 50mm wide...

 Open the catalog to page 3
Current Transformers-6

5 Model type Ratio range VA at Class 3 VA at Class 1 MA5Y 1/5 7.5 5 MA5Y 5/5 7.5 5 MA5Y 10/5 7.5 5 MA5Y 15/5 7.5 5 MA5Y 20/5 7.5 5 MA5Y 30/5 7.5 5 MA5Y 40/5 7.5 5 MA5Y Range Case Size: 77mm wide x 50mm deep x 116mm high 3" wide x 2" deep x 4.5" high Fixing: M8 stud primary bar Weight: 0.45Kg Ordering Codes MA5Y Add suffix to depict required ratio range. For example: MA5Y-5/5 M50-DINCLIP DIN-rail mounting clip for DIN-rail mounting option (2 required) Model type Ratio range VA at VA at VA at Class 3 Class 1 Class 0.5 M93L 400/5 15 7.5 3.75 M93L 500/5 20 15 5 M93L 600/5 30 20 10 M93L 750/5 20 15...

 Open the catalog to page 6
Current Transformers-7

6 Consult factory for availability and lead time on 1A secondary. Model type Ratio range VA at VA at VA at Class 3 Class 1 Class 0.5 M93S 800/5A 10 10 5 M93S 1000/5A 15 10 7.5 M93S 1200/5A 20 15 10 M93S 1250/5A 20 20 15 M93S 1500/5A 20 20 15 M93S 1600/5A 30 20 15 M93S 2000/5 30 20 15 M93S Range Case Size: 90mm wide x 30mm deep x 131mm high 3.5" wide x 1.2" deep x 5.1" high Aperture: 76.5 x 19mm, 60 x 30mm 3.0" x 0.7", 2.4" x 1.2" Weight: 0.7Kg Ordering Codes M93S Add suffix to depict required ratio range. For example: M93S-800/5 M30-DINCLIP DIN-rail mounting clip for DIN-rail mounting option...

 Open the catalog to page 7
Current Transformers-8

Model type Primary Current VA at Class 1 S95P 5 + 5 = 5 5 S95P 5 + 5 + 5 = 5 5 S95P Range Case Size: 90mm wide x 50mm deep x 144mm high 3.5" wide x 2" deep x 5.7" high Weight: 0.9Kg - 1.11Kg Ordering Codes S95P Add suffix to depict required ratio range. For example: S95P-5/5 M50-DINCLIP DIN-rail mounting clip for DIN-rail mounting option (2 required) • Mounting feet centres 71.5mm x 71mm Model type Primary Current VA at Class 1 S97P 5 + 5 + 5 + 5 = 5 5 S97P 5 + 5 + 5 + 5 + 5 = 5 5 S97P 5 + 5 + 5 + 5 + 5 + 5 = 5 5 S97P Range Case Size: 90mm wide x 70mm deep x 144mm high 3.5" wide x 2.8" deep x...

 Open the catalog to page 8
Current Transformers-11

Moulded Case Overview Range 10 Consult factory for availability and lead time on 1A secondary. Type MA5Y M53Q M55E M53J M65F M63N MA5G M93L Inside diameter (mm) 21 16.2 25 23 32 36 32 Busbar M8 Stud 20x6 15x5 30x10 20x10 40x10 40x10 50x10 25x15 30x30 40x30 20x20 Dimensions (mm) Height 116 65 80 80 94 94 116 131 Width 77 45 50 50 60 60 77 90 Depth 50 30 50 50 50 30 50 30 DIN-rail mounting X X X X X X X X X X X X X X X X Foot mounting X X X X X X X X X X X X X X X X Intergrated terminal cover X X X X X X X X X X X X X X X X Secondary 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 Primary current 1 X X 5 X X 10...

 Open the catalog to page 11
Current Transformers-12

Type M93S M93R MB5D MB5Z MC5T MD5T S95 S97 Inside diameter (mm) 63 35 Busbar 60x30 60x30 80x30 104x35 50x160 160x50 76.5x19 64x12.6 60x30 50x50 Dimensions (mm) Height 131 131 156 156 238 165 144 144 Width 90 90 134 134 140 213 90 90 Depth 30 30 50 50 50 50 50 70 DIN-rail mounting X X X X X X Foot mounting X X X X X X X X X X X X Intergrated terminal cover X X X X X X X X X X X Secondary 5 1 5 1 5 1 5 1 5 1 5 1 5 1 5 1 Primary current 5 10 15 20 25 30 40 50 60 75 80 100 125 150 160 200 250 300 400 X X 500 X X 600 X X 750 X X X X 800 X X X X X X X X 1000 X X X X X X X X 1200 X X X X X X X X 1250...

 Open the catalog to page 12
Current Transformers-13

Specifications System voltage 720V maximum System voltage 0.72kV Test voltage 3kV for 1 minute System frequency 50/60Hz Insulation class E Overload withstand 1.2 times rated current continuously Short circuit thermal 100 x rated primary for 1 second Operating temperature 20¢ªC to 70¢ªC Relative humidity 0-90% (non condensing) Compliant with IEC44-1, BS7626 Accuracy Class 3, 1 & 0.5 A range of split core current transformers that offers a cost effective and efficient method by which the current can be measured without the need to break the conductor, thereby reducing installation and commissioning...

 Open the catalog to page 13
Current Transformers-16

Tape Wound Current Transformers Features High quality comprehensive measurements Available in a wide range of transformer ratings Accuracy up to Class 0.5 Foot mounted Benefits Easier metering due to the reduction of high currents Insulated output improves operational safety Long product life Applications Switch gear Distribution systems Generator sets Control panels Overload protection Control devices System voltage 720V Test voltage 3kV for 1 minute System frequency 50Hz or 60Hz Primary ratings 5 - 4000A Secondary outputs 5A Short circuit thermal 3kA for 1 second Overload withstand 1.2 times...

 Open the catalog to page 16
Current Transformers-18

Energy Division Features • High quality comprehensive • Accuracy class 3 • 1 metre flying leads Benefits • Faster installation • Less field connections • Space saving solution • Time saving solution (ie. no screws to tighten) • No vibration issues when fitted in alternator box • Versatile with regard to fitting location • Cost effective Applications • Switch gear • Distribution system • Generator sets • Control panels Specification System voltage: 0.72kV Test voltage: 3kV for 1 minute System frequency: 50/60Hz Overload withstand: 1.2 times rated current continuously Insulation class: Class E...

 Open the catalog to page 18

Archived catalogs

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.