Current Transformer

MR Type Current Transformer

Item No.: MR
MR Current transformer is a very useful device, it converts high AC current to small easily manageable value.
Description
Description
Introduce

MR Current transformer is a very useful device, it converts high AC current to small easily manageable value. If current transformers have no busbar, they are manufactured without primary winding. Instead of this, it is possible to constitute primary winding by passing conductor or busbar inside torpidly core of transformer. Furthermore, the secondary terminals are under a transparent sealable covers.

MR are manufactured in two types for measuring and protection.

Applications
Current measurement, monitoring and piotection for electrical wiring and equipment.
Current and power measurement for electric motors, lighting,air compressor, heating and ventilation system.
Air-condition equipment and Current, power and energy monitoring device.
Relay protection device.
Features
The accuracy class is designed by the highest permissible percentage current (ratio) error at the rated current perscribed for the accuracy class concerned.
The  Electronic Transformer s the standard sillicon steel core models,tape wrapping current transformer, low cost.
The  measuring current transformers can be used with or without foot and plastic cover.
Technical Parameter

 

Electrical Parameter Mechanical Parameter
Frequency 50/60Hz Case PC/UL94-V0
Rated Input 30A-5000A Bobbin PBT
Measuring range 5%In-120%In Core Silicon steel
Rated Output 1A,5A Construction Screw
Ratio Voltage 0.72KV (AC) Operating Temp -25℃~+75℃
Dielectric strength 3.0KV/1mA/1min Operating Humidity ≤85%
Insulation Resistance DC500V/100MΩ min Output Connection Terminal

 

Specification

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-28 50/5A - 1.5
60/5A - 1.5
75/5A - 1.5
100/5A 1.5 2.5
50/1A - 1.5
60/1A - 1.5
75/1A - 1.5
100/1A 1.5 2.5

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-40 100/5A 1.5 2.5
150/5A 1.5 2.5
200/5A 2.5 5
250/5A 3.75 5
300/5A 3.75 5
100/1A 1.5 2.5
150/1A 1.5 2.5
200/1A 2.5 5
250/1A 3.75 5
300/1A 3.75 5

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-42 100/5A 1.5 2.5
150/5A 1.5 2.5
200/5A 2.5 5
250/5A 3.75 5
300/5A 3.75 5
100/1A 1.5 2.5
150/1A 1.5 2.5
200/1A 2.5 5
250/1A 3.75 5
300/1A 3.75 5

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-45 250/5A 3.75 5
300/5A 5 7.5
400/5A 5 7.5
250/1A 3.75 5
300/1A 5 7.5
400/1A 5 7.5

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-60 300/5A 3.75 5
400/5A 5 7.5
500/5A 5 10
600/5A 7.5 10
800/5A 7.5 10
300/1A 3.75 5
400/1A 5 7.5
500/1A 5 10
600/1A 7.5 10
800/1A 7.5 10

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-70 600/5A 5 1
800/5A 7.5 10
1000/5A 10 15
1200/5A 10 15
1500/5A 10 15
1600/5A 10 15
600/1A 5 10
800/1A 7.5 10
1000/1A 10 15
1200/1A 10 15
1500/1A 10 15
1600/1A 10 15

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-85 600/5A 5 10
800/5A 7.5 10
1000/5A 10 15
1200/5A 10 15
1500/5A 10 15
1600/5A 10 15
600/1A 5 10
800/1A 7.5 10
1000/1A 10 10
1200/1A 10 10
1500/1A 10 10
1600/1A 10 10

 

Type Ratio(A) Burden(VA)
class:0.5 class:1.0
MR-125 2000/5A 15 20
2500/5A 15 20
3000/5A 15 20
4000/5A 20 30
5000/5A 20 30
2000/1A 15 20
2500/1A 15 20
3000/1A 15 20
4000/1A 20 30
5000/1A 20 30

 

Dimensions

 

MR-28 MR-40
MR-42 MR-45
MR-60 MR-70
MR-85 MR-125

 

Accuracy test

Installation method

24Hs online service
365Ds NON-Stop Production 20Ys Professional Manufacturers
Professional designer and manufacturer of current transformer,
cooperated with Siemens ,schneider Fuji electrical softbank LG samdsung.
Tel:13968747975
Add:(Zhejiang Lierde Relay Co., Ltd.) Xinguang Ind. Zone, Liushi Town, Wenzhou, Zhejiang, China
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