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Current Transformers

Ratio: 200:5 amps
50-60 Hz
NSV: 0.6 kv

General Electric Current / instrument transformer. G.E. type JAK-0C. Ratio: 200:5 amps. BIL: 10kv (Basic Insulation Level 10,000V), NSV: 0.6kv (Nominal System Voltage 600V), 50-60 Hz. 10 lbs. 2-1/2" diameter window. 5" x 7-1/4" x 4-1/8" overall dimensions.

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

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

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

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.

6 amps RMS
Ratio: 70:1 current sense
500v isolation

GB International surface mount transformer. Current sense = 70:1 ratio. 500v isolation. 6 amps RMS. Operating temperature= -40úC to 180úC. 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.

Dimensions: 2" x 2-1/4" x 3"
Manufactured by Airpax
Alt. P/N: 741-0001-000

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.

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."

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."

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)

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).

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.

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.

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.

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.

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.

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.

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.

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.

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".

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Current Transformer 100 amps

(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.

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.