# Current Transformers

## Raina Current Transformer 221/5

### (TM) 221/5

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

TRI / 1-177.5.

## Raina Current Transformer 221/6

### (TM) 221/6

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

TRV 1-177.5.

## Weston Current Transformer 500/5 Ratio

### (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.

## Dwyer Instruments CCS Current Switch

### (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.

## Airpax DC Transducer

### (SEN) MAS61

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.

## Vitec Current Sense 20amp PC Board mount Transformer

### (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."

## Vitec Current Sense Transformer

### (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."

## Current Sense Transformer 20 mH / 1 ohm DCR

### (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)

## Current Sense Transformer 20mH / DCR = 1.4 ohm

### (TM) PE-51687

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).

## Current Sensor 50 amp 3/8" diameter

### (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.

## Current Transformer 62.5:1 turns ratio

### (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.

## Current Transformer 200:5 Amp Ratio

### (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.

## Current Transformer 75 Amps

### (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.

## Current Transformer 208 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.

## Current Transformer 1500:5 Amp Ratio

### (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.

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.

## Current Transformer 250:5 amp Ratio

### (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.

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").

## Type JP-1 Current Transformer 600:5 or 800:5

### (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.

## Current Transformer 600 amps 120:1 ratio

### (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.

## Current Transformer 195:5 amp Ratio

### (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.

## Current Transformer 800:5 amp Ratio

### (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.

## Current Transformer

### (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.

## Current Transformer 23,000:1 amp Ratio

### (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.

## Current Transformer 3 Phase / 156:2 amp Ratio

### (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.

## 2,500V maximum line voltage Current Transformer

### (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.

## 2,500V maximum line voltage Current Transformer

### (MTR) TR-2A

Max Line Voltage: 2500v

800:5 amp Ratio

Rated up to 15VA

**Sensitive Research**current 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.

## Current Transformer 2.5VA

### (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.

## Current Transformer 600:5 amp Ratio

### (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.

## Current Transformer 300:5 amp ratio maximum 600 amps

### (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.

## 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.

## GE Current Transformer 1200:5 Amp Ratio, 10kVA

### (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.

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.

## Crompton Current Transformer 100:5 amp Ratio

### (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.

## Crompton Current Transformer 250:5 amp Ratio

### (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.

## Current Transformer 300:5 amp Ratio

### (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.

## Current Transformer 200:5 amp Ratio

### (TM) 170RL-201

50 - 400 Hz

600v

10kv Isolation

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

## Surface Mount Transformer Current Sense

### (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.

## Current Transformer

### (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!!

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.

## WICC Current Transformer

### (TM) MW1110

Ratio: 250:5 amps

Burden: 1.1 @ 60 Hz

600v

**WICC** current transformer. Used.

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.

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.

## Gould Clamp-On AC Ammeter

### (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.

## LEM Current Module

### (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.