Crompton Instruments 21, 22, 24, 25 Data Sheet

20

Models 21, 22, 24, 25

Window Diameter 1.25", 1.63", 2.0", 2.5" 3.13"

Application:

Relaying and metering

Frequency:

50 – 400Hz

Insulation Level:

600 Volts, 10kV BIL full wave

• Terminals are brass studs No. 8 – 32
with one flat washer, lockwasher and
regular nut

• Multi-ratios available

• Order mounting bracket kit
separately

• Approximate weight: 10 lbs

21 – 500 50:5 – 1.2 2.4 – – – 0.026 2.0 2.0

21 – 750 75:5 C10 0.6 1.2 2.4 4.8 – 0.042 2.0 2.0

21 – 101 100:5 C10 0.6 1.2 1.2 2.4 4.8 0.063 2.0 2.0

21 – 151 150:5 C20 0.3 0.6 0.6 1.2 2.4 0.098 2.0 1.5

21 – 201 200:5 C20 0.3 0.3 0.6 0.6 1.2 0.126 2.0 1.5

21 – 251 250:5 C20 0.3 0.3 0.3 0.6 1.2 0.158 1.5 1.5

21 – 301 300:5 C20 0.3 0.3 0.3 0.3 0.3 0.168 1.5 1.33

21 – 401 400:5 C50 0.3 0.3 0.3 0.3 0.3 0.253 1.5 1.0

21 – 501 500:5 C20 0.3 0.3 0.3 0.3 0.6 0.283 1.5 1.0

21 – 601 600:5 C50 0.3 0.3 0.3 0.3 0.3 0.339 1.33 1.0

21 – 751 750:5 C50 0.3 0.3 0.3 0.3 0.3 0.424 1.0 0.8

21 – 801 800:5 C50 0.3 0.3 0.3 0.3 0.3 0.452 1.0 0.8

21 – 102 1000:5 C100 0.3 0.3 0.3 0.3 0.3 0.565 1.0 0.8

ANSI Metering class at 60Hz

Secondary
winding
resistance
(0HMS @ 75˚C

Continuous
thermal
rating factor

@30˚C @55˚C

Catalogue Current V.A. for
Number Ratio ±1% class

B0.1 B0.2 B0.5 B0.9 B1.8

Model 21

Window Diameter 1.25"
Approximate weight: 10 lbs

Approvals

CSA 223647

UL 257877

21

Model 22

Window Diameter 1.63"
Approximate weight: 9 lbs

22 – 101 100:5 C10 0.6 1.2 2.4 2.4 4.8 0.060 2.0 2.0

22 – 151 150:5 C10 0.3 0.6 1.2 1.2 2.4 0.090 2.0 2.0

22 – 201 200:5 C20 0.3 0.3 0.6 1.2 1.2 0.120 2.0 1.5

22 – 251 250:5 C20 0.3 0.3 0.6 0.6 1.2 0.150 1.5 1.5

22 – 301 300:5 C20 0.3 0.3 0.3 0.6 0.6 0.180 1.5 1.33

22 – 401 400:5 C20 0.3 0.3 0.3 0.3 0.6 0.241 1.5 1.0

22 – 501 500:5 C50 0.3 0.3 0.3 0.3 0.3 0.301 1.5 1.0

ANSI Metering class at 60Hz

Secondary
winding
resistance
(0HMS @ 75˚C

Continuous
thermal
rating factor

@30˚C @55˚C

Catalogue Current V.A. for
Number Ratio ±1% class

B0.1 B0.2 B0.5 B0.9 B1.8

23 – 101 100:5 – 0.6 0.6 2.4 4.8 – 0.051 2.0 2.0

23 – 151 150:5 C10 0.6 0.6 0.6 1.2 2.4 0.076 2.0 2.0

23 – 201 200:5 C10 0.3 0.6 0.6 1.2 2.4 0.114 2.0 1.5

23 – 251 250:5 C20 0.3 0.3 0.6 0.6 1.2 0.143 2.0 1.5

23 – 301 300:5 C20 0.3 0.3 0.3 0.6 1.2 0.171 1.5 1.33

23 – 401 400:5 C20 0.3 0.3 0.3 0.3 0.6 0.228 1.5 1.0

23 – 501 500:5 C20 0.3 0.3 0.3 0.3 0.3 0.286 1.5 1.0

23 – 601 600:5 C50 0.3 0.3 0.3 0.3 0.3 0.343 1.33 1.0

ANSI Metering class at 60Hz

Secondary
winding
resistance
(0HMS @ 75˚C

Continuous
thermal
rating factor

@30˚C @55˚C

Catalogue Current V.A. for
Number Ratio ±1% class

B0.1 B0.2 B0.5 B0.9 B1.8

Model 23

Window Diameter 2.00"
Approximate weight: 8.5 lbs