Yokogawa CTW Current Transformers - Manual (Page 2)

NOTE
When extending secondary-stage cable of the current transformer,
use a covered ring-sleeve or the like and a cable of 1.25 to 2 mm².
The standard cable length is as follows.
Up to 8.3 m for 1.25 mm², and up to 15 m for 2 mm²
4. Disposal
These current transformers, when no longer serviceable, must be disposed
of as industrial refuse.
5. Specifications
5.1 General
The CTW series are clamp-on current transformers that can be installed
much easier than conventional current transformers, whereby saving labor.
These transformers are particularly useful when expanding existing system
since you can attach them to a cable without having to cut it.
5.2 Characteristic Specifications
Rated primary current (In) / Rated secondary current:
CTW15= 100A / 1A
CTW35= 300A / 1A
Rated frequency: 50 / 60 Hz
Rated burden: 0.5 VA
Accuracy / Linearity: ±1.0% against rated primary current In
Phase difference: Within ±2° against rated primary current In
Operating circuit voltage: Within 500 V AC
Insulation resistance: 100 MΩ or more at 500 V DC (across core and
output)
Withstand voltage: 2000 V AC for one minute (across core and output)
Operating temperature range: -20 to 50°C (no condensation)
Operating conditions: Indoor location
Weight:
CTW15= Approx. 160 g
CTW35= Approx. 220 g
6. External Dimensions
Unit: mm
6.1 CTW15
45 1.5 (2.5)
36
39
64
AWG18
34 4 4
22
K L
φ
24
k (White) l (Black)
19
0
+2
0
- 0
10
+ 0 - 5
6.2 CTW35
57 1.5
45
49
80
k (White)
AWG18
38 4 4
22
K L
φ
36
l (Black)
(2.5)
190
+20 - 0
10
+ 0 - 5
IM 77C01W03-01E 3rd Edition: 2005.01.15-00
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