Current Transformers

(TM) 221/4

Raina & C current transformer. 1-1/8" x 2-1/4" x 1-3/4".

(TM) 221/5

Raina & C current transformer. 1-1/8" x 2-1/4" x 1-3/4".
TRI / 1-177.5.

(TM) 221/6

Raina & C current transformer. 1-1/8" x 2-1/4" x 1-3/4".
TRV 1-177.5.

(MTR) 461-15590

1 turn: 50/25
2 turn: 250/5
5 turn: 100/5

Weston current transformer. 15 va, 50-125 Hz, 1200 line volts. 1 turn: 500/5, 2 turns: 250/5, 5 turns: 100/5. Taps for 0.5, 1, 2.5, 5, 10, 25 & 50 amps. 2-3/4" x 6" x 8" high.

(TM) CCS-231150

1.5 to 200 amps
Dimensions: 1-1/4" x 2-1/2"H
Manufactured by Dwyer Instruments

Dwyer Instruments CCS current switch. Split core-clamp on. Adjustable set point. Contact closes when preset current level is achieved. 3-7/16" mounting center. Attach to any AC load and close a set of alarm contacts when a preset current has been achieved.

(SEN) MAS61

Dimensions: 2" x 2-1/4" x 3"
9/32" inner diameter hole @ transducer middle
Manufactured by Airpax

Airpax DC transducer. Wire passes through 9/32" inner diameter hole @ transducer middle. 2" x 2-1/4" x 3"L. Gates / Harris P/N: 741-0001-000.

(TM) 57P1820G

20 amps maximum
300 turns
DCR 11 ohms, 180 mH

Vitec current sense transformer for switching power supply. 20 amps peak. 300 turns. DCR 11 ohms, 180 mH. Vitec calls these "Current Sense Inductors."

(TM) 57P1822

DCR 14 ohms, 73 mH
350 turn ratio
Manufactured by Vitec

Vitec current sense transformer for switching power supply. 350 turn ratio. DCR 14 ohms, 73 mH. Vitec calls these "Current Sense Inductors."

(TM) D1870L

Inductance = 20 mH / DCR = 1 Ohm
Design frequency: 20 KHz-50KHz
100 turn

Coil Craft Series "D18XX" encapsulated model current sense transformer. 1 volt / amp sensitivity. 200ohm terminating resistor typically required. 100 turn. Maximum 24 amp. Design frequency = 20 KHz - 50 KHz (switcher power supplies). Inductance = 20 mH, DCR = 1 ohm. DC = 2005. 5/8" x 3/4" x 3/8". 1/2" lead spacing. 70,000 pcs available. Power-Mag P/N: CT10M100. Packed 405 units per case. For price breaks over 100pcs, must be ordered in multiples of 405 units. (full cases)

(TM) CS60-050

1 turn primary
50/60 Hz
50 amp maximum generates 280mV

Coil Craft 50/60 Hz current transformer measures 5-50 amps with a 1 turn primary passing through center hole. Increasing turn increases sensitivity. PC mount (3rd lead pictured is for stability.) 50 amps generates 280 mV typical in secondary. Center hole 3/8" diameter. Overall 7/16" x 1" x 1-1/8" high.

(TM) LT1879

62.5 : 1 Turns Ratio
Dimensions: 3-3/4" x 4" x 1-1/2". 1-3/8" hole
Alt. P/N: NSN: 5950-00-072-6868

Current transformer. 62.5 : 1 turns ratio. 1-3/8" hole. Model 500, Mfg. P/N: LT1879.

(TM) 5103

200 : 5 Amp Ratio
50-400 Hz
Dimensions: 1-7/16" diameter center hole. 1-3/16" deep x 3-3/4" wide x 4-1/4" high

Electromagnetic Industries Model 51. 50 - 400 Hz, 5 phase. 1-7/16" diameter center hole. 1-3/16" deep x 3-3/4" wide x 4-1/4" high. P/N: 864362. NSN: 5950-00-250-6949.

(TM) TRA-TQD901

75 Amps
Dimensions: 1-1/4"L x 7/8"W x 5/16"H

Hical high power current transformer. Surface mount. 1-1/4"L x 7/8"W x 5/16"H. We do not have specs but calculate the max current to be 75 amps.

(TM) B52-1220-1

208:1.33 ratio
1 turn primary
5 va @ 60 Hz 12.5 va @400 Hz

Electromagnetic Industries. 208 : 1.33 ratio. 5 va @ 60 Hz, 12.5 va @ 400 Hz, all at 1 turn primary. 4-1/4" outside diameter, 1-3/8" inside diameter, 1-1/4" thick. Mfg. P/N: 3-000-004.

(TM) W2-152

1500 : 5 Amp Ratio
25-400 Hz
1 turn primary

Square D 25 - 400 Hz, 10kv, current transformer has 5 amp output for 1500 amp load with 1 primary turn. 6-3/4" outside diameter, 4-1/4" inside diameter, 1-1/4" thick.

(TM) 687X2

300 : 5 amp Ratio / 25 - 60 Hz
600v / 10kv test
Dimensions: 4-1/2" inside diameter. 4-1/2" deep x 8-1/2" wide x 10-1/2" high

General Electric heavy duty core cast in rubber. 300:5 Ratio. 25 - 60 Hz. 4-1/2" inside diameter. 4-1/2" deep x 8-1/2" wide x  10-1/2" high. Steel mounting base. 600v / 10kv test.

(TM) SIMPLX100

250 : 5 amp Ratio
Rated 5va
Dimensions: 1-1/8" hole  3" square x 1-1/2" wide

Simplex 5 va series 100 current transformer. 1-1/8" hole. 250 amp load creates 5 amp signal. 3" square x 1-1/2" wide.

(TM) 76-C-69

1 Turn: 150:5/300:5/600:5/900:5 amp ratio
2 Turns: 75:5/150:5/300:5/150:5 amp ratio
750 volts maximum

R.B. Annis Co. current transformer. Split core. 25-60-400 cycles, up to 750 volts. 1 turn: 150:5/300:5/600:5/900:5 amp ratio.  2 turns: 75:5/150:5/300:5/450:5 amp ratio. 7" x 4" x 7". Window dimension 41mm X 89mm (1.6" X 3.5").

(TM) 750X99G1

1 Turn: 10:5/20:5/50:5/100:5/600:5/800:5 amp ratio
2 Turns: 5:5/10:5/25:5/50:5/300:5/400:5 amp ratio
25-60Hz

General Electric instrument current transformer. 1 turn: 10:5/20:5/50:5/100:5/600:5/800:5 amp ratio. .2 Turns: 2/ 4 / 10 / 20 / 120 / 160 : 1. For 600 volt circuit. 9-1/2" x 4" x 9-3/4". Excellent condition.

(TM) CN-1

600 amp load @ 12.5 va gives 5 amp output
120:1 Ratio
Dimensions: 9" wide x 6" deep x 5-1/2" high 2" square silver plated lugs with 9/16" holes

BBC ITE current transformer has 5 amp output for 600 amp load @ 12.5 va. Primary has huge 2" square silver plated lugs with 9/16" holes. Maximum dimension: 9" wide x 6" deep x 5-1/2" high.

(TM) 13206E4532-1

195:5 amp Ratio
25-800 Hz (cps) ASA accuracy @ 60 cps
Rated 5 va @ 60 cps

Weston current transformer. 195 : 5 amp ratio, 25 - 800 cps, 5 va @ 60 cps. ASA accuracy @ 60 cps. 0.6B-0.1 / 1.2B-0.2. 3-5/8" square, 1-1/2" I.D. hole. NSN: 5950-00-015-0083.

(TM) 7SFT801

800:5 Amp Ratio
600v
50-400 Hz

Instrument Transformers Inc. 50-400 Hz current transformer has 5 amp output for 800 amp load with 1 primary turn. 600v. Ins. Class 10kv. 2-1/2" diameter center hole. 1" deep x 4-1/2" wide x 5-1/4" high. NSN: 5905-01-248-1448.

(TM) 7SFT901

900 : 5 amp Ratio
1 turn primary
50-400 Hz

Instrument Transformers Inc. 50 - 400 Hz current transformer has 5 amp output for 900 amp load with 1 primary turn. 2-1/2" diameter center hole. 1" deep x 4-1/4" wide x 5-1/4" high.

(TM) K5546

23,000:1 amp Ratio
115 amps primary current generates 0.005 amps in the coil
Dimensions: 3-1/4" high, 1-1/8" diameter center hole, 1" deep coil, 2-1/4" wide at the base

Keytronics 115 amps primary current generates 0.005 amps in the coil. 3-1/4" high, 1-1/8" diameter center hole, 1" deep coil, 2-1/4" wide at the base.

(TM) 33-156-2

3 Phase
156:2 amp Ratio
50-400 hz

50 - 400 Hz current transformer has two amp output for 156 amp load. 1" diameter center holes. 1" deep x 3-1/4" wide x 7" high. Each phase terminated at top.

(MTR) 461-12160

1 Turn 800:5 Ratio, 2 Turns 400:5 amp Ratio
Max Line Voltage up to 2,500v
Rated 15 VA max.

Weston current transformer. 1 Turn: 800:5 amp ratio, 2 Turns: 400:5 ratio. Max line voltage: 2500v. Max 15 VA.  25-500Hz  Dimensions: 6"W x 8"H x 2-3/4"D.  1-5/8" inside hole diameter. Used, good condition. Checks out ok.

(MTR) TR-2A

Max Line Voltage: 2500v
800:5 amp Ratio
Rated up to 15VA

Sensitive Researchcurrent transformer. Same as (MTR) 461-12160.  1 Turn: 800:5 amp ratio, 2 Turns: 400:5 ratio. Max line voltage: 2500v. Max 15 VA.  25-500Hz  Dimensions: 6"W x 8"H x 2-3/4"D.  1-5/8" inside hole diameter. Used, good condition except cracked case near secondary terminals and possibly a burn (see photo). Checks out ok. Sold As-Is, no returns.

(MTR) 539-4306

2:1/5:1/10:1/20:1/100:1/200:1 amp Ratio
Up to 750 line volts
Rated up to 2 VA

Weston portable, adjustable current transformer. 25 - 400 Hz. 2 va. Up to 750 line volts. 1-5/8" inside hole diameter. 4" deep x 1-7/8" wide x 5-1/2" high.

(TM) A6301

2.5 va
15/16" center hole

An AC current flowing through the 15/16" center hole creates a monitor current in the transformer, limited to 2.5 va.

(TM) 750X10G8

600:5 ratio
25-400 Hz
Dimensions: 4-1/2"D x 8-1/2"W x 10-1/2"H

General Electric 600 amp, 600:5 Ratio. 25 - 400 Hz.  Dimensions: 4-1/2" deep x 8-1/2" wide x 10-1/2" high.  4-1/2" inside diameter.

(TM) 750X10G5

300:5 ratio
25-400 Hz
Dimensions: 4-1/2"D x 8-1/2"W x 10-1/2"H

General Electric 600 amp max, 300:5 Ratio. 25 - 400 Hz.  Dimensions: 4-1/2" deep x 8-1/2" wide x 10-1/2" high.  4-1/2" inside diameter.

(TM) MC15-C71-1346-120

25-60 Hz
Insulation 15 KV
Manufactured by I-T-E

I-T-E Circuit Breaker. 100:5 ratio produces 5 amps secondary for one turn 100 amp primary. 15kv / 95kv imp. level. 2" inside diameter. 7-1/4" deep x 7" diameter x 10-1/4" high.

(TM) PLCT4G07

1200:5 Amp Ratio
10,000V
3.7" x 7.5" Opening

GE current transformer. Ratio 1200:5 amps. 10 kv. 3.7" x 7.5" opening. MS27391.

(TM) D1871

Inductance: 80mH (min)
Design Frequency: 1-1,000KHz
200 turn

Coil Craft current sense transformer. 5.7 terminating ohm. 1-1000KHz. 35 amp (max). 200 turns. 596Vus volt time product.

(TM) 805-943U-PKLS-K

100:5 amp Ratio
600v
50-400Hz

Crompton current transformer. 100:5 amp ratio. 600v, 50-400Hz. 1-9/16" hole.

(TM) 805-943U-RSLS-K

250:5 amp Ratio
600v
50-400Hz

Crompton current transformer. 250:5 amp ratio. 600v, 50-400Hz. 1-9/16"D hole.

(TM) 5RBL-301

300:5 amp Ratio
50-400Hz
Dimensions: 1-9/16" I.D x 3-5/8"H

Current transformer. 300:5 amp ratio, 12.5VA, 600v, 50-400Hz. 10kv test.

(TM) 170RL-201

50 - 400 Hz
600v
10kv Isolation

Instrument Transformers Inc. current transformer. 200:5 amp ratio. 50 - 400 Hz, 600v. 10kv isolation.

(TM) 3448G

Operating temperature= -40°C to 180°C
Manufactured by GB International
Alt. P/N:

GB International surface mount transformer. Current sense = 70:1 ratio. 500v isolation. 6 amps RMS. Operating temperature= -40ºC to 180ºC. Tape & Reel. 0.325" x 0.260" x 0.228". Power One uses this CT in many different supplies. 1.4 million pieces in stock!! Mfg. P/N: 3448G.

(TM) PA0001

Pulse Engineering current transformer. Specifications unknown. Made for Power One switching power supply. 0.709" x 0.782" x 0.275"H. Power One P/N: HBD901P. 500,000 pcs in stock!!

(TM) 11110

Dimensions: 11"L x 4-1/4"H x 1-1/2"W
Manufactured by Technology Research
Alt. P/N: DOD P/N: 72-5333

Technology Research 3 phase current transformer. We do not have specs on this transformer. Each port has 2 screws, H1 & H2, H3 & H4, H5 & H6 that are secondaries for ports A, B, C. Additionally, there are winding C1 & C2, X1, X2, X3 that have continuity respectively. 1-1/4"D cable hole.

(TM) MW1110

Ratio: 250:5 amps
Burden: 1.1 @ 60 Hz
600v

WICC current transformer. Used.

(TM) 2878

300 Hz - 200 MHz
Output Volts per Amp: 0.1
10 amps Max RMS

Pearson Electronics pulse current transformer. Model 2878. "SMA" female. Removed, very clean.

(TM) CL-50

DC-200 KHz
+-12 - 15v DC
80 ohm Coil

F.W. Bell closed loop hall effect current sensor. PCB mount. Accurately measures DC and AC currents and provides electrical isolation between the current carrying conductor and the output of the sensor. Made in the USA.

(MTR) 633B

Ranges: 10 / 25 / 100 / 250 / 500 / 1000 AC amps
Manufactured by Gould
Alt. P/N:

Gould clamp-on AC ammeter. "Hurtin' For Certain". Meter has been replaced with binding posts. Range selector lever broken.

(TM) LB200-S/SP4

±15v DC
30 ohms Int. Res.
1 : 1000 Ratio

LEM current module. Closed loop "Hall Effect" transducer. Made in Geneva Switzerland. DC: 1994.

(MTR) SHUNT-AS3

2"L x 1-5/8"H
50 mV F.S

Meter shunt assortment. 50 mV F.S. 2"L x 1-5/8"H. Includes one of each:

• 30 amp
• 50 amp
• 0.2 amp
• 1 amp

(MTR) SHUNT-AS4

Meter shunt assortment

Meter shunt assortment. Includes one of each:

• CAT0042211: 5 amp - 50 mV / 10 amp - 100 mV
• MSA200: 20 amp - 50 mV
• 8406-3: 5 amp - 100 mV
• 8200-.02: 0.2 amp - 50 mV

(TM) JCD-3

1200:5 amp ratio
5kV / BIL 60kV
Grid grade - outdoor

GE current transformer. 1200:5 amp ratio, 60kV. 5kV/BIL 60kV. Grid grade - outdoor. 18" L x 19" H x 12" W. 5-1/2" DIA conductor opening. 130 pounds. Catalog No. 753X031008. New-unused.

(TM) 57P1687

Inductance = 20 mH / DCR = 1.4 Ohm
15.75 kv, 20KHz to 200KHz
100 turns

Pulse Engineering current sense transformer. 100 turns. 1.4 ohm primary DCR. 300 ma, 20 mH secondary Ind. 15.75 kv, 20 KHz to 200 KHz. 20 amp maximum.  Operating a current transformer as a voltage transformer provides a cost-effective alternative to injection transformers sold as test accessories (see PDF). 600 pcs per case.  Quantity breaks above 100pcs requires orders in multiples of 600 units. (full cases).

(TM) DEP20805-7684

4 3/4" ID hole. 24" x 13" x 21" tall
Manufactured by ABB
Alt. P/N:

ABB current transformer. 200/400:5 amp. Also LG-25-585. NSV 25.5kv BIL 150kv. 4 3/4" ID hole. 24" x 13" x 21" tall. 135lbs. New.

(TM) PEC20801122

5 1/4" x 6 3/8"H x 4 3/8"D. 2 1/2" Hole.
Manufactured by ABB
Alt. P/N:

ABB current transformer. 5 1/4" x 6 3/8"H x 4 3/8"D. 2 1/2" Hole. NSV 600 BIL 10kv. 800: 5amp Ratio. New.

(TM) PEC20801304

8"W x 10 1/4" H x 2 1/2" Deep. 5 1/2" ID
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 8"W x 10 1/4" H x 2 1/2" Deep. 5 1/2" ID. 1000:5 amp Ratio. NSV-600v BIL-10kv.

(TM) LG-15-585

20" x 14" Deep x 21 1/2" H
Manufactured by ABB
Alt. P/N:

ABB current transformer. 20" x 14" Deep x 21 1/2" H. 4 3/4" D hole. 400:5 amp 800:5 amp. 15kv NSV 110 kv BIL. New.

(TM) PEC20801304-B

8"W x 10 1/4" H x 2 1/2" Deep. 5 1/2" ID
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 8 1/4"W x 10 1/4" H x 2 1/2" Deep. 5 1/2" ID. 1000:5 amp Ratio. NSV-600v BIL-10kv. With Mounting Bracket.

(TM) PEC20801338

8 1/4" x 10 1/2" H x 2 5/8" Deep. 5 1/2" ID Hole.
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 8 1/4" x 10 1/2" H x 2 5/8" Deep. 5 1/2" ID Hole. 2000:5 amp Ratio. NSV-600v BIL-10kv. Also Type CLC

(TM) PEC20801072

5 1/4" x 6 7/8"  x 2 1/2" ID hole. 5 1/2" ID
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 5 1/4" x 6 7/8"  x 2 1/2" ID hole. 5 1/2" ID. 100:5 amp Ratio. NSV-600v BIL-10kv. New.

(TM) CPL20808085H

6"D x 8 1/2" H x 2 1/8" D. 3 1/2 x 4 1/2 Oval hole
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 6"D x 8 1/2" H x 2 1/8" D. 3 1/2 x 4 1/2 Oval hole. 2000:5 amp Ratio. NSV-600v BIL-10kv. Also CMV.

(TM) CPL20801338

8 1/8"W x 10 1/2" H x 2 1/2" Deep. 5 1/2" ID
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 8 1/8"W x 10 1/2" H x 2 1/2" Deep. 5 1/2" ID. 2000:5 amp Ratio. NSV-600v BIL-10kv. 60Hz.

(TM) 755C150014

13" x 11"  x 15" Tall
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 13" x 11"  x 15" Tall. 400:5 amp Ratio. 65 lbs. NSV-15kv BIL-110kv. 50-60Hz. JKW-5C. New.

(TM) 765C131101

14" x 12"  x 16" Tall.
Manufactured by GE
Alt. P/N:

GEpotential transformer primary 7200v AC. 14" x 12"  x 16" Tall. 61lbs. 60:1 amp Ratio. BIL-110kv. 60Hz. Also JVW-110C. 1000VA. Single bushing. New.

(TM) 755X031729

23" x 13"  x 19" Tall. 5 5/8" ID
Manufactured by GE
Alt. P/N:

GEtransformer. 23" x 13"  x 19" Tall. 5 5/8" ID. 600/1200:5 amp Ratio. NSV-14.4kv BIL-110kv. JCD-5.

(TM) 755X31G16

11 1/2" x 23" H. 5 5/8" D hole.
Manufactured by GE
Alt. P/N:

GEcurrent transformer. 11 1/2" x 23" H. 5 5/8" D hole. 600/1200: 5 amp Ratio. NSV-14.4v BIL-110kv. Also 755 x 31G16 JCD-5.

(TM) PEC20808085

6"D x 8 1/2" H x 2 1/8" Deep. 3 1/2" x 4 1/2" ID oval hole
Manufactured by ABB
Alt. P/N:

ABBcurrent transformer. 6"D x 8 1/2" H x 2 1/8" Deep. 3 1/2" x 4 1/2" ID oval hole. 2000:5 amp Ratio. NSV-600v BIL-10kv. Also CMV-HT

(TM) 755X030009

32" x 10"  x 16" Tall.
Manufactured by GE
Alt. P/N:

GE transformer. 32" x 10"  x 16" Tall. 97lbs. Also JCW-5. 600/1200:5 amp Ratio. NSV-14.4kv BIL-110kv. New.

(TM) 753X031016

18" x 12.5"  x 19" Tall. 5 1/2" ID
Manufactured by GE
Alt. P/N:

GEcurrent transformer. 18" x 12.5"  x 19" Tall. 5 1/2" ID. 113lbs.  600/1200:5 amp Ratio. NSV-4.8kv BIL-60kv. JCD-3. New.

(TM) 755X031020

23" x 12"  x 19" Tall.
Manufactured by GE
Alt. P/N:

GEcurrent transformer. 23" x 12"  x 19" Tall. 5 5/8" ID. 2000/4000:5 amp Ratio. NSV-14.4kv BIL-110kv. 123 lbs. New.

(TM) 787-401

12" x 6 1/2" H
Alt. P/N:

Instrument Transformercurrent transformer. 12" x 6 1/2" H. 5 1/16" ID hole. 400:5 amp Ratio. NSV-600v BIL-10kv. 50-400Hz. New.

(TM) 135-202MR

9 1/8"W x 9 1/8" H x 3" Deep. 5 3/4" ID.
Alt. P/N:

Cutler Hammercurrent transformer. 9 1/8"W x 9 1/8" H x 3" Deep. 5 3/4" ID. 2000:5 amp Ratio. NSV-600v. 50-400Hz. Tapped Secondary. New in Box.

(TM) LG-25-585

24" x 13"  x 21" Tall.
Manufactured by Kuhlman
Alt. P/N:

Kuhlmancurrent transformer. 24" x 13"  x 21" Tall. 4 1/2" ID. 1000/2000:5 amp Ratio. NSV-25v BIL-150kv.

(TM) LGX-25-585

23" x 10 " x 22 " Tall
Manufactured by Pinetops
Alt. P/N:

Pinetopscurrent transformer. 23" x 10 " x 22 " Tall. 4 1/2" ID. 1000:5 amp Ratio. NSV-25.5kv BIL-150kv. 116lbs. New. PNFO 31000X

(TM) GIFD25-03ER

13" x 13"  x 21" Tall.
Manufactured by Ritz
Alt. P/N:

Ritzcurrent transformer. 13" x 13"  x 21" Tall. 5" ID. 1000:5 amp Ratio. NSV-25.5kv BIL-150kv.

(TM) 301X

17.5 pounds
High frequency 3dB cut-off - 2MHz (approximate)
Low frequency 3dB cut-off - 5Hz (approximate)

Pearson Electronics wideband/pulse current transformer. Model 301X. .01 volts/amp. 50,000 amps peak. 400 ac amps RMS. 200 ns risetime. UHF female connector. output: 50 Ω. 8" x 9"H x 2 5/8"W. 3 3/4" hole.