Your Search returned 36 Results In 0.006 seconds
ASK101.4, CT, Current transformers, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 1800/1a, 1800/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a,

For full specification Click Here
ASK101.4 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 130mm
 MAX CONDUCTOR SIZE 70mm DIA
 MAX BUS-BAR SIZE 100 x 10mm OR 2 x 80 x 10mm
 PRIMARY RANGES FROM 500AMPS TO 2500AMPS
 1AMP OR 5AMP SECONDARIES
ASK101.4
ASK103.3, CT, Current Transformers, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/5a,

For full specification Click Here
ASK103.3 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 172mm
 MAX CONDUCTOR SIZE 85mm DIA
 MAX BUS-BAR SIZE 2 x 100 x 10mm OR 3 x 80 x 10mm
 PRIMARY RANGES FROM 800AMPS TO 3000AMPS
 1AMP OR 5AMP SECONDARIES
ASK103.3
ASK103.41, CTs, Current Transformer, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 750/1a, 750/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 2000/1a, 2000/5a,

For full specification Click Here
ASK103.41 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 199mm
 MAX BUS-BAR SIZE 103 x 41mm
 PRIMARY RANGES FROM 400AMPS TO 2000AMPS
 1AMP OR 5AMP SECONDARIES
ASK103.41
ASK105.6, CT, Current transformer, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/5a

For full specification Click Here
ASK105.6 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 129mm
 MAX BUS-BAR SIZE 100 x 55mm
 PRIMARY RANGES FROM 600AMPS TO 2000AMPS
 1AMP OR 5AMP SECONDARIES
ASK105.6
ASK105.6N, CT, Current transformer, 2500/1a, 2500/5a, 3000/1a, 3000/5a, 4000/1a, 4000/5a, 5000/1a, 5000/5a,

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ASK105.6N Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 129mm
 MAX BUS-BAR SIZE 100 x 55mm
 PRIMARY RANGES FROM 2500AMPS TO 5000AMPS
 1AMP OR 5AMP SECONDARIES
ASK105.6N
ASK123.3, CTs, current transformers, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 1800/1a, 1800/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/5a, 4000/1a, 4000/5a,

For full specification Click Here
ASK123.3 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 172mm
 MAX CONDUCTOR SIZE 100mm DIA
 MAX BUS-BAR SIZE 123 x 30mm OR 3 x 100 x 10mm
 PRIMARY RANGES FROM 1000AMPS TO 4000AMPS
 1AMP OR 5AMP SECONDARIES
ASK123.3
ASK127.4, CTs, Current transformer, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 1800/1a, 1800/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a,

For full specification Click Here
ASK127.4 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 159mm
 MAX BUS-BAR SIZE 120 x 70mm
 PRIMARY RANGES FROM 1000AMPS TO 2500AMPS
 1AMP OR 5AMP SECONDARIES
ASK127.4
ASK128.4, CTs, Current Transformer, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a,

For full specification Click Here
ASK128.4 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 100mm
 MAX BUS-BAR SIZE 128 x 38mm
 PRIMARY RANGES FROM 400AMPS TO 4000AMPS
 1AMP OR 5AMP SECONDARIES
ASK128.4
ASK129.10, CT, Current transformers, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 1800/1a, 1800/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/5a, 4000/1a, 4000/5a, 5000/1a, 5000/5a, 6000/1a, 6000/5a, 7500/1a, 7500/5a,

For full specification Click Here
ASK129.10 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 250mm
 MAX BUS-BAR SIZE 120 x 90mm
 PRIMARY RANGES FROM 1000AMPS TO 7500AMPS
 1AMP OR 5AMP SECONDARIES
ASK129.10
ASK130.5, CT, Current transformer, 300/1a, 300/5a, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 750/1a, 750/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/

For full specification Click Here
ASK130.5 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 180mm
 MAX BUS-BAR SIZE 130 x 30mm
 PRIMARY RANGES FROM 300AMPS TO 3200AMPS
 1AMP OR 5AMP SECONDARIES
ASK130.5
Current Transformers, ASK231.5,

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ASK231.5 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 49.5mm
 MAX CONDUCTOR SIZE 28mm DIA.
 MAX BUS-BAR SIZE 30 x 10mm
 PRIMARY RANGES FROM 50AMPS TO 600AMPS
 1AMP OR 5AMP SECONDARIES
ASK231.5
Current Transformers, ASK31.3,

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ASK31.3 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 60mm
 MAX CONDUCTOR SIZE 26mm DIA
 MAX BUS-BAR SIZE 30 x 10mm
 PRIMARY RANGES FROM 50AMPS TO 750AMPS
 1AMP OR 5AMP SECONDARIES
ASK31.3
Current Transformers, ASK31.5

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ASK31.5 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 60mm
 MAX CONDUCTOR SIZE 28mm DIA.
 MAX BUS-BAR SIZE 2 X 20 X 10mm OR 30 X 10mm
 PRIMARY RANGES FROM 40AMPS TO 600AMPS
 1AMP OR 5AMP SECONDARIES
ASK31.5
Current Transformers, ASK318.3

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ASK318.3 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 60mm
 MAX CONDUCTOR SIZE 26mm DIA
 MAX BUS-BAR SIZE 31 x 18mm
 PRIMARY RANGES FROM 60AMPS TO 750AMPS
 1AMP OR 5AMP SECONDARIES
ASK318.3
Current Transformers, ASK41.3,

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ASK41.3 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 60mm
 MAX CONDUCTOR SIZE 26mm DIA
 MAX BUS-BAR SIZE 40 x 12mm OR 32 x 18mm
 PRIMARY RANGES FROM 100AMPS TO 800AMPS
 1AMP OR 5AMP SECONDARIES
ASK41.3
Current Transformers, ASK41.4,

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ASK41.4 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 70mm
 MAX CONDUCTOR SIZE 32mm DIA
 MAX BUS-BAR SIZE 40 x 10mm OR 2 x 30 x 5mm
 PRIMARY RANGES FROM 50AMPS TO 1000AMPS
 1AMP OR 5AMP SECONDARIES
ASK41.4
Current Transformers, ASK412.4,

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ASK412.4 Features

 DIN RAIL, BUS-BAR OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 70mm
 MAX CONDUCTOR SIZE 30.5mm DIA
 MAX BUS-BAR SIZE 40 x 12mm OR 30 x 15mm
 PRIMARY RANGES FROM 50AMPS TO 800AMPS
 1AMP OR 5AMP SECONDARIES
ASK412.4
Current Transformers, ASK51.4,

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ASK51.4 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 85mm
 MAX CONDUCTOR SIZE 44mm DIA
 MAX BUS-BAR SIZE 2 X 40 X 10 mm OR 50 X 12mm
 PRIMARY RANGES FROM 100AMPS TO 1200AMPS
 1AMP OR 5AMP SECONDARIES
ASK51.4
Current Transformers, ASK541.4,

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ASK541.4 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 85mm
 MAX CONDUCTOR SIZE 32mm DIA
 MAX BUS-BAR SIZE 2 x 30x 5mm OR 40 x 10mm
 PRIMARY RANGES FROM 30AMPS TO 1000AMPS
 1AMP OR 5AMP SECONDARIES
ASK541.4
Current Transformers, ASK561.4

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ASK561.4 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 85mm
 MAX CONDUCTOR SIZE 44mm DIA
 MAX BUS-BAR SIZE 60 x 10mm OR 2 x 50 x 10mm
 PRIMARY RANGES FROM 200AMPS TO 1200AMPS
 1AMP OR 5AMP SECONDARIES
ASK561.4
Current Transformers, ASK61.4,

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ASK61.4 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 95mm
 MAX CONDUCTOR SIZE 44mm DIA
 MAX BUS-BAR SIZE 63 x 10mm OR 2 x 50 x 10mm
 PRIMARY RANGES FROM 200AMPS TO 1600AMPS
 1AMP OR 5AMP SECONDARIES
ASK61.4
Current Transformers, ASK63.4,

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ASK63.4 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 95mm
 MAX CONDUCTOR SIZE 44mm DIA
 MAX BUS-BAR SIZE 60 x 30mm OR 50 x 40mm
 PRIMARY RANGES FROM 300AMPS TO 2000AMPS
 1AMP OR 5AMP SECONDARIES
ASK63.4
ASK63.6, CT, Current transformer, 200/1a, 200/5a, 250/1a, 250/5a, 300/1a, 300/5a, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a,

For full specification Click Here
ASK63.6 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 88mm
 MAX CONDUCTOR SIZE 30mm DIA
 MAX BUS-BAR SIZE 60 x 30mm
 PRIMARY RANGES FROM 200AMPS TO 2000AMPS
 1AMP OR 5AMP SECONDARIES
ASK63.6
ASK81.4, CT, Current transformer, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a,

For full specification Click Here
ASK81.4 Features

 FOOT OR BUS-BAR MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 TRANSFORMER WIDTH 120mm
 MAX CONDUCTOR SIZE 55mm DIA
 MAX BUS-BAR SIZE 80 x 10mm OR 60 x 30 OR 2 x 60 x 10mm
 PRIMARY RANGES FROM 400AMPS TO 2000AMPS
 1AMP OR 5AMP SECONDARIES
ASK81.4
ASK83.4, CTs, Current Transformer, 300/1a, 300/5a, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 750/1a, 750/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1250/1a, 1250/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 1800/1a, 1800/5a, 2000/1a, 2000/5a

For full specification Click Here
ASK83.4 Features

 FOOT MOUNTED OR BUS-BAR MOUNTED
 DUAL POSITION OF SECONDARY TERMINALS (TOP & SIDE)
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 EXTERNAL DIMENSION 116 x 96mm
 MAX BUS-BAR SIZE 84 X 34mm
 PRIMARY RANGES FROM 300AMPS TO 2500AMPS
 1AMP OR 5AMP SECONDARIES
ASK83.4
Current Transformers, ASR20.3, 50/1A, 50/5A, 60/1A, 60/5A, 80/1A, 80/5A, 100/1A, 100/5A, 150/1A, 150/5A, 200/1A, 200/5A, 250/1A, 250/5A, 300/1A, 300/5A,

For full specification Click Here
ASR20.3 Features

 DIN RAIL MOUNTED OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 TRANSFORMER WIDTH 44mm
 MAX CONDUCTOR SIZE 21mm DIA
 PRIMARY RANGES FROM 50AMPS TO 300AMPS
 1AMP OR 5AMP SECONDARIES
ASR20.3
Current Transformers, ASR21.3,

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ASR21.3 Features

 DIN RAIL MOUNTED OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 TRANSFORMER WIDTH 48.5mm
 MAX CONDUCTOR SIZE 22.5mm DIA
 PRIMARY RANGES FROM 100AMPS TO 600AMPS
 1AMP OR 5AMP SECONDARIES
ASR21.3
Current Transformers, ASR22.3,

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ASR22.3 Features

 DIN RAIL MOUNTED OR FOOT MOUNTED
 SNAP FIT SECONDARY TERMINAL COVERS
 TRANSFORMER WIDTH 60mm
 MAX CONDUCTOR SIZE 22.5mm DIA
 PRIMARY RANGES FROM 40AMPS TO 600AMPS
 1AMP OR 5AMP SECONDARIES
ASR22.3
KBU23, CT, Current transformer, split core current transformer, 100/1a, 100/5a, 150/1a, 150/5a, 200/1a, 200/5a, 300/1a, 300/5a, 400/1a, 400/5a,

For full specification Click Here
KBU23 Features

 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 UNIQUE SNAP SHUT & RELEASE ACTION
 TRANSFORMER WIDTH 93mm
 MAX BUS-BAR SIZE 20 x 30mm
 PRIMARY RANGES FROM 100AMPS TO 400AMPS
 1AMP OR 5AMP SECONDARIES
KBU23
KBU58, CTs, current transformer, split core current transformer, 250/1a, 250/5a, 300/1a, 300/5a, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a,

For full specification Click Here
KBU58 Features

 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 UNIQUE SNAP SHUT & RELEASE ACTION
 TRANSFORMER WIDTH 125mm
 MAX BUS-BAR SIZE 50 x 80mm
 PRIMARY RANGES FROM 250AMPS TO 1000AMPS
 1AMP OR 5AMP SECONDARIES
KBU58
KBU812, CTs, current transformers, split core current transformers, 250/1a, 250/5a, 300/1a, 300/5a, 400/1a, 400/5a, 500/1a, 500/5a, 600/1a, 600/5a, 800/1a, 800/5a, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a,

For full specification Click Here
KBU812 Features

 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 UNIQUE SNAP SHUT & RELEASE ACTION
 TRANSFORMER WIDTH 155mm
 MAX BUS-BAR SIZE 80 x 120mm
 PRIMARY RANGES FROM 250AMPS TO 1500AMPS
 1AMP OR 5AMP SECONDARIES
KBU812
KBU816, CTs, current transformers, split core current transformers, 1000/1a, 1000/5a, 1200/1a, 1200/5a, 1500/1a, 1500/5a, 1600/1a, 1600/5a, 2000/1a, 2000/5a, 2500/1a, 2500/5a, 3000/1a, 3000/5a, 4000/1a, 4000/5a, 5000/1a, 5000/5a,

For full specification Click Here
KBU816 Features

 SNAP FIT SECONDARY TERMINAL COVERS
 INSULATED ENDS TO BUS-BAR PINCH SCREWS
 UNIQUE SNAP SHUT & RELEASE ACTION
 TRANSFORMER WIDTH 193mm
 MAX BUS-BAR SIZE 80 x 160mm
 PRIMARY RANGES FROM 1000AMPS TO 5000AMPS
 1AMP OR 5AMP SECONDARIES
KBU816
NMC CT, nmc module, transducer, MBs,

For full specification Click Here
Look at this for a great idea, do you ultimately need an analogue signal for your current measurement ? Many of the CTs feature a plug in transducer module option.

Just twist of the secondary terminal covers and remove the secondary terminal screws. Screw in the brass transformer to module connecting studs and plug in the NMC module.

Each NMC transducer block will give two different isolated analogue outputs. Also the secondary of the current transformer is repeated, if this repeat facility is not required the supplied shorting link must be left in situ. It is possible to generate 0-20mA and 0-10VDC without any auxiliary supply (self powered module version). Please note that the self powered versions can only be used on current transformers with an output of at least 2.5VA, if a 4-20mA signal is required in all cases an auxiliary supply is required, 24VDC, 110VAC or 230VAC.
NMC Transducer
OCR, Relay trip, MBS,

For full specification Click Here
Look at this for a great idea, do you ultimately need a relay contact output for your current measurement? Many of the CTs feature a plug in relay module option.

Just twist of the secondary terminal covers and remove the secondary terminal screws. Screw in the brass transformer to module connecting studs and plug in the OCR module.

The OCR modules provide two volt free contact outputs rated at 5Amps 1N/C and 1N/O, connected to an adjustable time delay to avoid nuisance tripping. The OCR modules always require an auxiliary supply, 24VAC is also possible with the OCR module.
OCR Current Relay
Summation CTs, KSU2, KSU3, SUSK4, SUSK5, SUSK6, SUSK7, SUSK8

For full specification Click Here
Summation current transformers enable the summation of several independant loads on different supplies.

An example three 3 phase supplies to be read by one KWh meter.
Supply 1: 200Amps, Supply 2: 800Amps, supply 3: 1000Amps
Required for each supply are three main CTs of the above primary currents, one for each phase R/Y/B. Also required will be three, 3 input summation CTs, each of the summation CTs must be designated to a phase. The secondaries from the Red phase main CTs should be fed to the inputs of the Red phase summation CT, likewise the same applies for Yellow and Blue phases. The secondary output from the summation CT will then equal the sum of the 3 primary currents:- 200/5 + 800/5 + 1000/5 = 2000/5. The meter being used must therefore be calibrated for 2000/5.
The above example of summation CTs have unbalanced ratio inputs and therefore have to be manufactured to order. Balanced ratio input summation CTs are usually ex-stock.
Summation CTs can also be used for subtraction purposes by reversing the polariry of the inputs. It is also possible to summate a mixture of single phase and three phase supplies.
Summation CTs
Current Transformers, WSK40, 1/1, 5/5, 10/1, 10/5, 15/1, 15/5, 20/1, 20/5, 30/1, 30/5, 40/1, 40/5,

For full specification Click Here
WSK40 Features

 DIN RAIL MOUNTED OR FOOT MOUNTED
 SNAP FIT TERMINAL COVERS
 TRANSFORMER WIDTH 70mm
 PRIMARY RANGES FROM 1AMP TO 40AMPS
 1AMP OR 5AMP SECONDARIES
WSK40

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