7020-01038-0 Murata Power Solutions Inc, 7020-01038-0 Datasheet - Page 2

• Manufacturer Part Number: 7020-01038-0
• Description: TRANSFORMER CURRENT 100A
• Manufacturer: Murata Power Solutions Inc
• Series: DMSr
• Type: AC Current Transformersr

Specifications of 7020-01038-0

• Transformer Type: Frequency 50-400Hz
• Current Rating: 5A
• Mounting Type: Free Hanging (In-Line)
• Equipment Type: AC Current Transformers
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Dc Resistance (dcr): -
• Inductance: -
• Turns Ratio - Primary:secondary: -
• E.t.: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 7020-1038-0; 811-1108

TECHNICAL NOTES
4. Reference Documentation: Prior to connecting CTs to any measure-
5. Secondary Lead Extensions: When calculating the total burden
6. Accuracy: The indicated accuracy specifications are valid as long
*
Table 1. Selection Guide
DATEL Part No.
7020-01036-0
7020-01037-0
7020-01038-0
7020-01039-0
7020-01040-0
7020-01041-0
39-3681407*
39-3681408*
39-3681409*
7020-01042-0
7020-01043-0
7020-01044-0
7020-01045-0
7020-01046-0
ment device (analog or digital), relay, or other apparatus, be sure to
thoroughly review the applicable device’s technical documentation (for
example, DATEL’s ACA5-20PC product data sheet). In particular, make
sure the CT’s ratings meet the requirements of your application.
imposed on a CT’s 5A output, DATEL’s ACA5 digital ammeters’ input
impedance is negligible and can be assumed to be zero Ohms. In
many applications, the length of secondary wiring can be increased up
to the value specified in Table 1 without adversely affecting perfor-
mance.
In order to achieve the specified accuracy, the maximum permissible
burden must not exceed the value shown in Table 1. When used with
ACA5 ammeters, the total burden is the sum of the resistance of the
CT’s 24” leads and any lead-extensions. Make sure all connections
are securely tightened and properly strain relieved. If terminal blocks
are used for intermediary connections, refer to the manufacturer’s
torque recommendations.
Table 1 lists general guidelines for adding lead extensions when using
DATEL’s ACA5-Series ammeters as the readout device. The lengths in
Table 1 assume the lead extensions are 16AWG. Stated dimensions
are one-way distances between the ACA5 and the CT. Make sure all
secondary extensions meet or exceed the specifications of the CT’s
built-in leads. In order to minimize external noise pick up, lead exten-
sions should be as kept short as possible.
as the total secondary burden does not exceed the value in Table 1’s
Not RoHS Compliant
Current Ratio
(Amps)
1000:5
1500:5
2000:5
100:5
150:5
200:5
250:5
300:5
400:5
500:5
600:5
750:5
50:5
75:5
www.murata-ps.com
Accuracy
(@ 60Hz)
±2%
±2%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
±1%
VA (Ohms)
10.0 (0.40)
12.5 (0.50)
12.5 (0.50)
20.0 (0.80)
10.0 (0.40)
10.0 (0.40)
10.0 (0.40)
12.5 (0.50)
15.0 (0.60)
1.5 (0.06)
3.0 (0.12)
3.0 (0.12)
6.0 (0.24)
8.0 (0.32)
Burden
7. Polarity: CTs are marked with ‘H1’ (primary) and ‘X1’ (secondary)
8. Thermal Rating Factor: The thermal rating factor denotes the amount
burden column. Accuracy measurements are taken at 100% primary
current, using a resistive burden and a nominal line frequency of 60Hz.
polarity indicators. When a CT’s only function is to measure amperes,
polarity markings can be disregarded. However, correct polarity is
mandatory in applications in which the phase relationship between
two currents is involved (watt or watt-hour meters are two examples
of polarity sensitive applications). Refer to the respective instruments’
documentation for more information.
by which the primary current can be increased on a continuous
basis over its rated value without exceeding the CT’s maximum
temperature rise.
The formula below can be used to calculate thermal rating factors at
temperatures above 30°C.
NRF = Rating Factor at New Ambient Temperature
RF = 30°C Rating Factor
NAT = New Ambient Temperature
Example: Find the 55°C. thermal rating factor of a 2000:5 CT whose
30°C rating factor is 2.0
Technical enquiries email: [e-mail], tel:
Feet (Meters)
Lead Ext.
40 (12.2)
50 (15.2)
50 (15.2)
80 (24.4)
40 (12.2)
40 (12.2)
40 (12.2)
50 (15.2)
60 (18.3)
10 (3.0)
10 (3.0)
20 (6.1)
30 (9.1)
4 (1.2)
5 Amp AC Current Transformers
NRF =
DMS Accessories
NRF =
(85 - NAT)(RF)
(85 - 55)(2)
Thermal Rating Factor
MPM_DMS-CT.A01 Page 2 of 4
NAT
55
(@30°C)
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
2.0
2.0
2.0
2.0
2.0
2
[phone]
2
= 1.48