Myrra

Myrra High Frequency Ferrite
Current Transformers Range


• FOR MAINS AC CURRENT MEASUREMENT - 50 to 400Hz

Myrra P/N Size Ratio Current range
PIN PRIMARY - up to 25A
74521 Size E19-H Ratio 1 / 1 / 750 Current 10A / 20A
74523 Size E19-V Ratio 1 / 500 Current 15A
74531

74533

74534		 Size E25 Ratio 1 / 1 / 1000

Ratio 1 / 1000

Ratio 1 / 350		 Current 12.5A / 25A

Current 8A

Current 4A
74561 Size U10.5 Ratio 1 / 2000 Current 8A
 
THRU-HOLE PRIMARY - up to 250A
74503

74504		 Size T18 Ratio 1 / 1000

Ratio 1 / 750		 Current 12A

Current 10A
74511 Size T30 Ratio 1 / 1000 Current 60A
74543, 74544, 74545

74546, 74547, 74548		 Size T40 Ratio 1 / 500

Ratio 1 / 1000		 Current 100A

Current 250A

• FOR SWITCH MODE POWER SUPPLIES - 20 to 150kHz

Myrra P/N Size Ratio Current range
PIN PRIMARY - up to 25A
74520 Size E19-H Ratio 1 / 1 / 100 Current 10A / 20A
74530 Size E25 Ratio 1 / 1 / 100 Current 12.5A / 25A
74550 Size E13 Ratio 1 / 100 Current 10A
74560

74562		 Size U10.5 Ratio 1 / 100 Current 10A
74570 Size T15 Ratio 1 / 1 / 50 Current 10A / 20A
 
THRU-HOLE PRIMARY - up to 200A
74500

74501

74502		 Size T18 Ratio 1 / 50

Ratio 1 / 100

Ratio 1 / 200		 Current 15A

Current 25A

Current 25A
74510 Size T30 Ratio 1 / 100 Current 150A
74540, 74541, 74542 Size T40 Ratio 1 / 100 Current 200A


Toroidal/Thru-Hole

Myrra P/N Sec.
Turns		 Max Pri.
Current
A rms		 Rsec.
Ω
max		 LSec.
mH
min		 Pulse
Vsec x t max
@Frequency		 Sine
Vsec max
@Frequency		 Typical Load /
Accuracy / Current
74500 50 15A 0.6 Ω 5 175 V.µS
20-200kHz		 15 V
20-200kHz		 50 Ω / 1% / 15A
74501 100 25A 1.5 Ω 20 350 V.µS
20-100kHz		 25 V
20-100kHz		 100 Ω / 1% / 25A
74502 200 25A 5 Ω 80 700 V.µS
20-100kHz		 50 V
20-100kHz		 200 Ω / 1% / 25A
74503 1000 12A 45 Ω 2000 2.5 V.mS
50Hz		 0.15V/50Hz/12A
0.6V/50Hz/8A		 ≤10 Ω / 2% / 12A
≤40 Ω / 2% / 8A
74504 750 10A 35 Ω 1100 2.0 V.mS
50Hz		 0.13V/50Hz/10A
0.3V/50Hz/5A		 ≤10 Ω / 2% / 10A
≤40 Ω / 2% / 5A
 
74510 100 150A 0.25 Ω 40 1 V.ms / 20kHz
700 Vµs/ 100kHz		 50 V/20kHz
80 V/100kHz		 1 - 20 Ω / 1%
74511 1000 60A 32 Ω 4000 10 V.ms / 50Hz 0.6 V / 50Hz / 60 A
1 V / 50Hz / 40 A		 ≤10 Ω / 1% / 60A
≤20 Ω / 1% / 40A
 
74540 100 200A 0.35 Ω 50 2 V.ms / 20kHz
1 V.ms/ 100kHz		 150 V/20kHz
150 V/100kHz		 1 - 20 Ω / 1%
74543 500 100A 6.5 Ω 1250 10 V.ms / 50Hz 0.7 V / 50Hz / 100 A
1.2 V / 50Hz / 60 A		 ≤3 Ω / 1% / 100A
≤10 Ω / 1% / 60A
74546 1000 250A 22 Ω 8000 100 V.ms / 50Hz 15 V / 50Hz / 250 A ≤50 Ω / 1% / 250A
 
74541 100 200A 0.35 Ω 50 2 V.ms / 20kHz
1 V.ms/ 100kHz		 150 V/20kHz
150 V/100kHz		 1 - 20 Ω / 1%
74544 500 100A 6.5 Ω 1250 10 V.ms / 50Hz 0.7 V / 50Hz / 100 A
1.2 V / 50Hz / 60 A		 ≤3 Ω / 1% / 100A
≤10 Ω / 1% / 60A
74547 1000 250A 22 Ω 8000 100 V.ms / 50Hz 15 V / 50Hz / 250 A ≤50 Ω / 1% / 250A
 
74542 100 200A 0.35 Ω 50 2 V.ms / 20kHz
1 V.ms/ 100kHz		 150 V/20kHz
150 V/100kHz		 1 - 20 Ω / 1%
74545 500 100A 6.5 Ω 1250 10 V.ms / 50Hz 0.7 V / 50Hz / 100 A
1.2 V / 50Hz / 60 A		 ≤3 Ω / 1% / 100A
≤10 Ω / 1% / 60A
74548 1000 250A 22 Ω 8000 100 V.ms / 50Hz 15 V / 50Hz / 250 A ≤50 Ω / 1% / 250A


Pin Primary Types

Myrra P/N Ratio Max Pri.
Current
A rms		 Rsec.
Ω
max		 LSec.
mH
min		 Pulse
Vsec x t
max		 Sine
Vsec
rms max		 Typical Load /
Accuracy / Current		 Insulation
Voltage
P/S

For Switch Mode Power Supplies - 20 to 150 kHz
74520 1/1/100 20A parallel
10A series		 1.5 8 400 V.µs 50 Vrms 10 - 100 Ω / 1% / 10A 2500 V

For Mains AC Current Measurement - 50 to 400 Hz
74521 1/1/750 20A parallel
10A series		 57 300 15 V.ms 3 Vrms ≤ 75 Ω / 4% / 20A 2500 V

For Mains AC Current Measurement - 50 to 400 Hz
74523 1/500 15A 155 670 30 V.ms 6 Vrms ≤ 50 Ω / 2% / 15A
≤ 200 Ω / 5% / 10A		 1500 V

For Switch Mode Power Supplies - 20 to 150 kHz
74530 1/1/100 25A parallel
12.5A series		 1 10 600 V.µs 80 Vrms 10 - 100 Ω / 1% / 25A 2500 V

For Mains AC Current Measurement - 50 to 400 Hz
74531 1/1/1000 25A parallel
12.5A series		 90 4H 8 V.ms 1.6 Vrms ≤ 50 Ω / 2% / 20A 2500 V
74533 1/1000 8 360 17H 15 V.ms 3 Vrms ≤ 200 Ω / 1% / 8A
≤ 500 Ω / 1.5% / 5A		 2500 V
74534 1/350 4A 380 19H 15 V.ms 3 Vrms ≤ 100 Ω / 1% / 4A
≤ 500 Ω / 1.5% / 2A		 2500 V

For Switch Mode Power Supplies - 20 to 150 kHz
74550 1/100 10 2.3 6 250 V.µs 40 Vrms 10 - 100 Ω / 1% / 10A 1500 V

For Switch Mode Power Supplies - 20 to 150 kHz
74560 1/100 10 1.1 12 300 V.µs 25 Vrms 5 - 50 Ω / 1% / 10A 4000 V
74562 1/100 25 1.1 12 300 V.µs 25 Vrms 5 - 50 Ω / 1% / 25A 4000 V

For Mains AC Current Measurement - 50 to 400 Hz
74561 1/2000 8 400 4.5 5 V.ms 1 Vrms ≤ 100 Ω / 2% / 6A 4000 V

For Switch Mode Power Supplies - 20 to 150 kHz
74570 1/1/50 20A parallel
10A series		 0.32 9 150 V.µs 12 Vrms 5 - 25 Ω / 1% / 20A 4000 V