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MRD-L Series Zero-sequence CT
1.Product Overview
When circuit grounds, CT could senses zero-sequence grounding current. To be
equiped with relay protector or signal devices, it help device components act
for the purpose of protecting or monitoring circuit.
MRD-L series zero-sequence CT is a kind of cable type, using ABS engineering
plastics as casing, poured by resin. With beautiful appearance, good
hermeticness, high insulation, high sensitivity, good linearity, easy
installation and wide application, it is not only suitable to magnetic relay,
but also to electronics and mico-computer devices. CT type is determined by the
operation way of user.(Neutral ground, unground,ground by high-resistance,low
resistance or arc suppression coil.
MRD-L series zero-sequence CT core is made of ZH120-130 cold rolled silicon steel
sheet imported from Japan with advantages of smooth surface, constant thickness,
good conductivity, strong sensitivity to magnetizing, accuracy and stability.
2.2.2.2. Model Explanation
Zero Sequence Current Transformer
J Square
X Round
B Integrated
K Open
MRD - L
Baoding Mingrui Optoelectronics Technology Co., Ltd
J: matched with micro-computer
protection and arc suppression coil
Devices
No classification: applies to others
Inner Dia
Outline of MRD-L ZSCT, see picture 1
3.Main Technical Data and Operation Conditions3.Main Technical Data and Operation Conditions3.Main Technical Data and Operation Conditions3.Main Technical Data and Operation Conditions
3.1 Voltage Grade: 0.38kv-66kv
3.2 Grid Frequency:50Hz
3.3 Corresponding Terminals: If cable is wired-in from front(L1) of CT, then L1and K1 is
corresponding terminals.
3.4 Ambient Temperature: -10celsius - 60celsius
3.5 Altitude: be or lower than 1000m (If used highland , please indicate when ordering)
3.6 Relative Humidity: daily averaged lower than 95%, monthly averaged lower
MRD-LJMRD-LX
MRD-LJ
MRD-LX
Picture 1
MRD-L Zero Sequence CT
than 90%
3.7 Environmental Necessities: no conductive dust, mental or corrosive gas or
mycete which will damage insulation existing around the site.
4. Installation Instructions
4.1 Integrated CT should be installed before laying cables, and cables go through CT.
4.2 Open zero-sequence CT could be installed at any time and the details as follows:
1)remover connecting presser of K1and K2 on CT.
2)After loosening and removal of inner hexagon bolts on the top of CT, it comes into two
parts.
3)Fix the CT on the cable, clean the two touching surface, coat anti-rust oil, align the two
parts and fasten inner hexagon bolts.
4)Fix the connection sheets at K1 and K2 position.
Note: The two partes of openable zeroNote: The two partes of openable zeroNote: The two partes of openable zeroNote: The two partes of openable zero----sequence CT could not be interchanged sequence CT could not be interchanged sequence CT could not be interchanged sequence CT could not be interchanged
with twith twith twith that of other CT.hat of other CT.hat of other CT.hat of other CT.
5.Model Selection InstructionModel Selection InstructionModel Selection InstructionModel Selection Instruction
1)Inner Diameter (select site cable and inner diameter of zero-sequence CT), See table1
Table1
0-sequence CT Spec. Cable Section mm2
φ80 3×50 and below
φ100 3×70 3×95
φ120 3×120 3×150 3×185
φ140 2×(3×150) 3×240 3×300
φ160 2×(3×185)
φ180 2×(3×240)
φ200 3×(3×185)
φ240 3×(3×240) 2×(3×300) 4×(3×185)
2)Mounting size of MRD-LJK/LJB 0-sequence CT, see diagram 2 below
Diagram 2 Mounting size of MRD-LJK/LJB 0-sequence CT
Note: hole diameteNote: hole diameteNote: hole diameteNote: hole diameter is r is r is r is φφφφM Length is Length is Length is Length is L Height is Height is Height is Height is H Depth is Depth is Depth is Depth is D Foot margin Foot margin Foot margin Foot margin
center distance is center distance is center distance is center distance is E B、、、、C is distance between four holes φφφφ8.5 hole is through
hole.
3)Mounting size of MRD-LXK/LXB series zero-sequence CT, please see diagram 3
Diagram 3 Mounting size of MRD-LXK/LXB series zero-sequence CT
MRD-L Zero Sequence CT
Table 2
Outline Size(mm)
Model No.
Rated
Ratio
A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
Precis
ion
50/5 2.5 80 196 165 49 173 145 124 M8 10P5
50/1 5 80 196 165 49 173 145 124 M8 10P5
75/5 5 80 196 165 49 173 145 124 M8 10P5
75/1 5 80 196 165 49 173 145 124 M8 10P5
100/5 5 80 196 165 49 173 145 124 M8 10P5
100/1 5～7.5 80 196 165 49 173 145 124 M8 10P5
150/5 5 80 196 165 49 173 145 124 M8 10P10
150/5 10 80 196 165 49 173 145 124 M8 10P5
150/1 5 80 196 165 49 173 145 124 M8 10P10
150/1 10 80 196 165 49 173 145 124 M8 10P5
200/5 10～15 80 196 165 49 173 145 124 M8 10P5
200/1 5 80 196 165 49 173 145 124 M8 10P10
200/1 10 80 196 165 49 173 145 124 M8 10P5
300/5 15～20 80 196 165 49 173 145 124 M8 10P5
300/1 15 80 196 165 49 173 145 124 M8 10P5
600/1 15 80 196 165 49 173 145 124 M8 10P10
600/1 30 80 196 165 49 173 145 124 M8 10P5
MRD-LJB8
0
Integra
ted Type
600/5
and
higher
20～30 80 196 165 49 173 145 124 M8 10P10
50/5 2.5 100 216 187 54 193 158 138 M8 10P5
50/1 5 100 216 187 54 193 158 138 M8 10P5
75/5 5 100 216 187 54 193 158 138 M8 10P5
75/1 5 100 216 187 54 193 158 138 M8 10P5
100/5 5 100 216 187 54 193 158 138 M8 10P5
100/1 5～7.5 100 216 187 54 193 158 138 M8 10P5
150/5 5 100 216 187 54 193 158 138 M8 10P10
150/5 10 100 216 187 54 193 158 138 M8 10P5
MRD-LJB1
00
Integrat
ed Type
150/1 5 100 216 187 54 193 158 138 M8 10P10
150/1 10 100 216 187 54 193 158 138 M8 10P5
200/5 10～15 100 216 187 54 193 158 138 M8 10P5
200/1 5 100 216 187 54 193 158 138 M8 10P10
200/1 10 100 216 187 54 193 158 138 M8 10P5
300/5 15～20 100 216 187 54 193 158 138 M8 10P5
300/1 15 100 216 187 54 193 158 138 M8 10P5
600/1 15 100 216 187 54 193 158 138 M8 10P10
600/1 30 100 216 187 54 193 158 138 M8 10P5
600/5 and
higher 20～30 100 216 187 54 193 158 138 M8 10P10
Table 4
Outline Size(mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
precis
e
50/5 2.5 120 236 205 59 213 173 154 M8 10P5
50/1 5 120 236 205 59 213 173 154 M8 10P5
75/5 5 120 236 205 59 213 173 154 M8 10P5
75/1 5 120 236 205 59 213 173 154 M8 10P5
100/5 5 120 236 205 59 213 173 154 M8 10P5
100/1 5～7.5 120 236 205 59 213 173 154 M8 10P5
150/5 5 120 236 205 59 213 173 154 M8 10P10
150/5 10 120 236 205 59 213 173 154 M8 10P5
150/1 5 120 236 205 59 213 173 154 M8 10P10
150/1 10 120 236 205 59 213 173 154 M8 10P5
200/5 10～15 120 236 205 59 213 173 154 M8 10P5
200/1 5 120 236 205 59 213 173 154 M8 10P10
200/1 10 120 236 205 59 213 173 154 M8 10P5
300/5 15～20 120 236 205 59 213 173 154 M8 10P5
300/1 15 120 236 205 59 213 173 154 M8 10P5
600/1 15 120 236 205 59 213 173 154 M8 10P10
600/1 30 120 236 205 59 213 173 154 M8 10P5
MRD-LJB1
20
integrat
ed type
600/5 and
higher 20～30 120 236 205 59 213 173 154 M8 10P10
MRD-L Zero Sequence CT
Table 5
Outline Size(mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
precis
e
50/5 2.5 140 300 268 81 270 217 179 M12 10P5
50/1 5 140 300 268 81 270 217 179 M12 10P5
75/5 5 140 300 268 81 270 217 179 M12 10P5
75/1 5 140 300 268 81 270 217 179 M12 10P5
100/5 5 140 300 268 81 270 217 179 M12 10P5
100/1 5～7.5 140 300 268 81 270 217 179 M12 10P5
150/5 5 140 300 268 81 270 217 179 M12 10P10
150/5 10 140 300 268 81 270 217 179 M12 10P5
150/1 5 140 300 268 81 270 217 179 M12 10P10
150/1 10 140 300 268 81 270 217 179 M12 10P5
200/5 10～15 140 300 268 81 270 217 179 M12 10P5
200/1 5 140 300 268 81 270 217 179 M12 10P10
200/1 10 140 300 268 81 270 217 179 M12 10P5
300/5 15～20 140 300 268 81 270 217 179 M12 10P5
300/1 15 140 300 268 81 270 217 179 M12 10P5
600/1 15 140 300 268 81 270 217 179 M12 10P10
600/1 30 140 300 268 81 270 217 179 M12 10P5
MRD-LJB1
40x
integrat
ed type
600/5 及
以上 20～30 140 300 268 81 270 217 179 M12 10P10
Table 6
Outline Size (mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
precis
e
50/5 2.5 160 300 268 81 270 217 179 M12 10P5
50/1 5 160 300 268 81 270 217 179 M12 10P5
75/5 5 160 300 268 81 270 217 179 M12 10P5
75/1 5 160 300 268 81 270 217 179 M12 10P5
MRD-LJB1
60
integrat
ed type
100/5 5 160 300 268 81 270 217 179 M12 10P5
Table 7
100/1 5～7.5 160 300 268 81 270 217 179 M12 10P5
150/5 5 160 300 268 81 270 217 179 M12 10P10
150/5 10 160 300 268 81 270 217 179 M12 10P5
150/1 5 160 300 268 81 270 217 179 M12 10P10
150/1 10 160 300 268 81 270 217 179 M12 10P5
200/5 10～15 160 300 268 81 270 217 179 M12 10P5
200/1 5 160 300 268 81 270 217 179 M12 10P10
200/1 10 160 300 268 81 270 217 179 M12 10P5
300/5 15～20 160 300 268 81 270 217 179 M12 10P5
300/1 15 160 300 268 81 270 217 179 M12 10P5
600/1 15 160 300 268 81 270 217 179 M12 10P10
600/1 30 160 300 268 81 270 217 179 M12 10P5
600/5 and
higher 20～30 160 300 268 81 270 217 179 M12 10P10
Outline Size (mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
precis
e
50/5 2.5 180 300 268 81 270 217 179 M12 10P5
50/1 5 180 300 268 81 270 217 179 M12 10P5
75/5 5 180 300 268 81 270 217 179 M12 10P5
75/1 5 180 300 268 81 270 217 179 M12 10P5
100/5 5 180 300 268 81 270 217 179 M12 10P5
100/1 5～7.5 180 300 268 81 270 217 179 M12 10P5
150/5 5 180 300 268 81 270 217 179 M12 10P10
150/5 10 180 300 268 81 270 217 179 M12 10P5
150/1 5 180 300 268 81 270 217 179 M12 10P10
150/1 10 180 300 268 81 270 217 179 M12 10P5
200/5 10～15 180 300 268 81 270 217 179 M12 10P5
200/1 5 180 300 268 81 270 217 179 M12 10P10
200/1 10 180 300 268 81 270 217 179 M12 10P5
300/5 15～20 180 300 268 81 270 217 179 M12 10P5
MRD-LJB1
80
integrat
ed type
300/1 15 180 300 268 81 270 217 179 M12 10P5
MRD-L Zero Sequence CT
Table 8
Table 9
600/1 15 180 300 268 81 270 217 179 M12 10P10
600/1 30 180 300 268 81 270 217 179 M12 10P5
600/5 and
higher 20～30 180 300 268 81 270 217 179 M12 10P10
Outline Size (mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
Inner
Bolt
precis
e
50/5 2.5 200 386 344 82 355 279 238 M12 10P5
50/1 5 200 386 344 82 355 279 238 M12 10P5
75/5 5 200 386 344 82 355 279 238 M12 10P5
75/1 5 200 386 344 82 355 279 238 M12 10P5
100/5 5 200 386 344 82 355 279 238 M12 10P5
100/1 5～7.5 200 386 344 82 355 279 238 M12 10P5
150/5 5 200 386 344 82 355 279 238 M12 10P10
150/5 10 200 386 344 82 355 279 238 M12 10P5
150/1 5 200 386 344 82 355 279 238 M12 10P10
150/1 10 200 386 344 82 355 279 238 M12 10P5
200/5 10～15 200 386 344 82 355 279 238 M12 10P5
200/1 5 200 386 344 82 355 279 238 M12 10P10
200/1 10 200 386 344 82 355 279 238 M12 10P5
300/5 15～20 200 386 344 82 355 279 238 M12 10P5
300/1 15 200 386 344 82 355 279 238 M12 10P5
600/1 15 200 386 344 82 355 279 238 M12 10P10
600/1 30 200 386 344 82 355 279 238 M12 10P5
MRD-LJB2
00
integrat
ed type
600/5 及
以上 20～30 200 386 344 82 355 279 238 M12 10P10
Outline Size(mm)
Model No.
Rated
Ratio A
Rated
Secondary
Capacity
VA
φM L H D E B C
Foot
inner
bolt
precis
e
Table 10
Outline (mm)
Model No.
Rated
Ratio
A
Rated Ratio
VA φM L H D E B C
Foot
inner
bolt
precis
e
50/5 10 120 300 268 81 270 217 179 M12 10P5
50/5 5 120 300 268 81 270 217 179 M12 10P10
75/5 15 120 300 268 81 270 217 179 M12 10P5
75/5 7.5 120 300 268 81 270 217 179 M12 10P10
100/5 20 120 300 268 81 270 217 179 M12 10P5
100/5 10 120 300 268 81 270 217 179 M12 10P10
150/5 30 120 300 268 81 270 217 179 M12 10P5
150/5 15 120 300 268 81 270 217 179 M12 10P10
200/5 40 120 300 268 81 270 217 179 M12 10P5
200/5 20 120 300 268 81 270 217 179 M12 10P10
50/5 2.5 240 386 344 82 355 279 238 M12 10P5
50/1 5 240 386 344 82 355 279 238 M12 10P5
75/5 5 240 386 344 82 355 279 238 M12 10P5
75/1 5 240 386 344 82 355 279 238 M12 10P5
100/5 5 240 386 344 82 355 279 238 M12 10P5
100/1 5～7.5 240 386 344 82 355 279 238 M12 10P5
150/5 5 240 386 344 82 355 279 238 M12 10P10
150/5 10 240 386 344 82 355 279 238 M12 10P5
150/1 5 240 386 344 82 355 279 238 M12 10P10
150/1 10 240 386 344 82 355 279 238 M12 10P5
200/5 10～15 240 386 344 82 355 279 238 M12 10P5
200/1 5 240 386 344 82 355 279 238 M12 10P10
200/1 10 240 386 344 82 355 279 238 M12 10P5
300/5 15～20 240 386 344 82 355 279 238 M12 10P5
300/1 15 240 386 344 82 355 279 238 M12 10P5
600/1 15 240 386 344 82 355 279 238 M12 10P10
600/1 30 240 386 344 82 355 279 238 M12 10P5
MRD-LJB2
40
integrat
ed type
600/5 及
以上 20～30 240 386 344 82 355 279 238 M12 10P10
MRD-L Zero Sequence CT
300/5 15 120 300 268 81 270 217 179 M12 10P20
300/5 30 120 300 268 81 270 217 179 M12 10P10
50/1 5 120 300 268 81 270 217 179 M12 10P10
50/1 10 120 300 268 81 270 217 179 M12 10P5
75/1 15 120 300 268 81 270 217 179 M12 10P5
75/1 7.5 120 300 268 81 270 217 179 M12 10P10
100/1 10 120 300 268 81 270 217 179 M12 10P10
100/1 5 120 300 268 81 270 217 179 M12 10P20
Table 11
outline(mm)
Model No.
Rated
Ratio A
Rated
Ratio
VA
φM L H D E B C
Foot
inner
bolt
precis
e
50/5 2.5 80 196 165 49 173 145 124 M8 10P5
50/1 5 80 196 165 49 173 145 124 M8 10P5
75/5 5 80 196 165 49 173 145 124 M8 10P5
75/1 5 80 196 165 49 173 145 124 M8 10P5
100/5 5 80 196 165 49 173 145 124 M8 10P5
100/1 5～7.5 80 196 165 49 173 145 124 M8 10P5
150/5 5 80 196 165 49 173 145 124 M8 10P10
150/5 10 80 196 165 49 173 145 124 M8 10P5
150/1 5 80 196 165 49 173 145 124 M8 10P10
150/1 10 80 196 165 49 173 145 124 M8 10P5
200/5 10～15 80 196 165 49 173 145 124 M8 10P5
200/1 5 80 196 165 49 173 145 124 M8 10P10
200/1 10 80 196 165 49 173 145 124 M8 10P5
300/5 15～20 80 196 165 49 173 145 124 M8 10P5
300/1 15 80 196 165 49 173 145 124 M8 10P5
600/1 15 80 196 165 49 173 145 124 M8 10P10
600/1 30 80 196 165 49 173 145 124 M8 10P5
MRD-LJK8
0
open
type
600/5 and
higher 20～30 80 196 165 49 173 145 124 M8 10P10
Table 12
Model No. Rated Rated Ratio Outline (mm) precis
Ratio A VA
φM L H D E B C
Foot
inner
bolt
e
50/5 2.5 100 216 187 54 193 158 138 M8 10P5
50/1 5 100 216 187 54 193 158 138 M8 10P5
75/5 5 100 216 187 54 193 158 138 M8 10P5
75/1 5 100 216 187 54 193 158 138 M8 10P5
100/5 5 100 216 187 54 193 158 138 M8 10P5
100/1 5～7.5 100 216 187 54 193 158 138 M8 10P5
150/5 5 100 216 187 54 193 158 138 M8 10P10
150/5 10 100 216 187 54 193 158 138 M8 10P5
150/1 5 100 216 187 54 193 158 138 M8 10P10
150/1 10 100 216 187 54 193 158 138 M8 10P5
200/5 10～15 100 216 187 54 193 158 138 M8 10P5
200/1 5 100 216 187 54 193 158 138 M8 10P10
200/1 10 100 216 187 54 193 158 138 M8 10P5
300/5 15～20 100 216 187 54 193 158 138 M8 10P5
300/1 15 100 216 187 54 193 158 138 M8 10P5
600/1 15 100 216 187 54 193 158 138 M8 10P10
600/1 30 100 216 187 54 193 158 138 M8 10P5
MRD-LJK1
00
open
type
600/5 and
higher 20～30 100 216 187 54 193 158 138 M8 10P10
Table 13
Outline (mm)
Model No.
Rated
Ratio A
Rated Ratio
VA φM L H D E B C
Foot
inner
bolt
precis
e
50/5 2.5 120 236 205 59 213 173 154 M8 10P5
50/1 5 120 236 205 59 213 173 154 M8 10P5
75/5 5 120 236 205 59 213 173 154 M8 10P5
75/1 5 120 236 205 59 213 173 154 M8 10P5
100/5 5 120 236 205 59 213 173 154 M8 10P5
100/1 5～7.5 120 236 205 59 213 173 154 M8 10P5
150/5 5 120 236 205 59 213 173 154 M8 10P10
MRD-LJK1
20
open
type
150/5 10 120 236 205 59 213 173 154 M8 10P5
MRD-L Zero Sequence CT
150/1 5 120 236 205 59 213 173 154 M8 10P10
150/1 10 120 236 205 59 213 173 154 M8 10P5
200/5 10～15 120 236 205 59 213 173 154 M8 10P5
200/1 5 120 236 205 59 213 173 154 M8 10P10
200/1 10 120 236 205 59 213 173 154 M8 10P5
300/5 15～20 120 236 205 59 213 173 154 M8 10P5
300/1 15 120 236 205 59 213 173 154 M8 10P5
600/1 15 120 236 205 59 213 173 154 M8 10P10
600/1 30 120 236 205 59 213 173 154 M8 10P5
600/5 and
higher 20～30 120 236 205 59 213 173 154 M8 10P10
Table 14
Outline (mm)
Model No.
Rated
Ratio A
Rated
secondary
capacity
VA
φM L H D E B C
Foot
inner
bolt
precis
e
50/5 2.5 140 300 268 81 270 217 179 M12 10P5
50/1 5 140 300 268 81 270 217 179 M12 10P5
75/5 5 140 300 268 81 270 217 179 M12 10P5
75/1 5 140 300 268 81 270 217 179 M12 10P5
100/5 5 140 300 268 81 270 217 179 M12 10P5
100/1 5～7.5 140 300 268 81 270 217 179 M12 10P5
150/5 5 140 300 268 81 270 217 179 M12 10P10
150/5 10 140 300 268 81 270 217 179 M12 10P5
150/1 5 140 300 268 81 270 217 179 M12 10P10
150/1 10 140 300 268 81 270 217 179 M12 10P5
200/5 10～15 140 300 268 81 270 217 179 M12 10P5
200/1 5 140 300 268 81 270 217 179 M12 10P10
200/1 10 140 300 268 81 270 217 179 M12 10P5
300/5 15～20 140 300 268 81 270 217 179 M12 10P5
300/1 15 140 300 268 81 270 217 179 M12 10P5
600/1 15 140 300 268 81 270 217 179 M12 10P10
600/1 30 140 300 268 81 270 217 179 M12 10P5
MRD-LJK1
40
open
type
600/5 and
higher 20～30 140 300 268 81 270 217 179 M12 10P10
Table 15
Table 16
Outline (mm)
Model No.
Rated
Ratio A
Rated Ratio
VA φM L H D E B C
bolt
precis
e
50/5 2.5 160 300 268 81 270 217 179 M12 10P5
50/1 5 160 300 268 81 270 217 179 M12 10P5
75/5 5 160 300 268 81 270 217 179 M12 10P5
75/1 5 160 300 268 81 270 217 179 M12 10P5
100/5 5 160 300 268 81 270 217 179 M12 10P5
100/1 5～7.5 160 300 268 81 270 217 179 M12 10P5
150/5 5 160 300 268 81 270 217 179 M12 10P10
150/5 10 160 300 268 81 270 217 179 M12 10P5
150/1 5 160 300 268 81 270 217 179 M12 10P10
150/1 10 160 300 268 81 270 217 179 M12 10P5
200/5 10～15 160 300 268 81 270 217 179 M12 10P5
200/1 5 160 300 268 81 270 217 179 M12 10P10
200/1 10 160 300 268 81 270 217 179 M12 10P5
300/5 15～20 160 300 268 81 270 217 179 M12 10P5
300/1 15 160 300 268 81 270 217 179 M12 10P5
600/1 15 160 300 268 81 270 217 179 M12 10P10
600/1 30 160 300 268 81 270 217 179 M12 10P5
MRD-LJK1
60
open
type
600/5 and
higher 20～30 160 300 268 81 270 217 179 M12 10P10
Outline (mm) Model No.
Rated
Ratio A
Rated Ratio
VA φM L H D E B C Bolt
precis
e
50/5 2.5 180 300 268 81 270 217 179 M12 10P5
50/1 5 180 300 268 81 270 217 179 M12 10P5
75/5 5 180 300 268 81 270 217 179 M12 10P5
75/1 5 180 300 268 81 270 217 179 M12 10P5
100/5 5 180 300 268 81 270 217 179 M12 10P5
MRD-LJK1
80
open
type
100/1 5～7.5 180 300 268 81 270 217 179 M12 10P5
MRD-L Zero Sequence CT
Table 17
150/5 5 180 300 268 81 270 217 179 M12 10P10
150/5 10 180 300 268 81 270 217 179 M12 10P5
150/1 5 180 300 268 81 270 217 179 M12 10P10
150/1 10 180 300 268 81 270 217 179 M12 10P5
200/5 10～15 180 300 268 81 270 217 179 M12 10P5
200/1 5 180 300 268 81 270 217 179 M12 10P10
200/1 10 180 300 268 81 270 217 179 M12 10P5
300/5 15～20 180 300 268 81 270 217 179 M12 10P5
300/1 15 180 300 268 81 270 217 179 M12 10P5
600/1 15 180 300 268 81 270 217 179 M12 10P10
600/1 30 180 300 268 81 270 217 179 M12 10P5
600/5 and
higher 20～30 180 300 268 81 270 217 179 M12 10P10
Outline (mm)
Model No.
Rated
Ratio A
Rated Ratio
VA φM L H D E B C
Bolt
precis
e
50/5 2.5 200 386 344 82 355 279 238 M12 10P5
50/1 5 200 386 344 82 355 279 238 M12 10P5
75/5 5 200 386 344 82 355 279 238 M12 10P5
75/1 5 200 386 344 82 355 279 238 M12 10P5
100/5 5 200 386 344 82 355 279 238 M12 10P5
100/1 5～7.5 200 386 344 82 355 279 238 M12 10P5
150/5 5 200 386 344 82 355 279 238 M12 10P10
150/5 10 200 386 344 82 355 279 238 M12 10P5
150/1 5 200 386 344 82 355 279 238 M12 10P10
150/1 10 200 386 344 82 355 279 238 M12 10P5
200/5 10～15 200 386 344 82 355 279 238 M12 10P5
200/1 5 200 386 344 82 355 279 238 M12 10P10
200/1 10 200 386 344 82 355 279 238 M12 10P5
300/5 15～20 200 386 344 82 355 279 238 M12 10P5
MRD-LJK2
00
open
type
300/1 15 200 386 344 82 355 279 238 M12 10P5
Table 18
Table 19
Outline (mm)
Model No.
Rated
Ratio
A
Rated
secondary
capacity
VA
φM L H D E B C
Bolt
precis
e
50/5 10 120 300 268 81 270 217 179 M12 10P5
50/5 5 120 300 268 81 270 217 179 M12 10P10
600/1 15 200 386 344 82 355 279 238 M12 10P10
600/1 30 200 386 344 82 355 279 238 M12 10P5
600/5 and
higher 20～30 200 386 344 82 355 279 238 M12 10P10
Outline (mm) Model No.
Rated
Ratio A
Rated Ratio
VA φM L H D E B C Bolt
precis
e
50/5 2.5 240 386 344 82 355 279 238 M12 10P5
50/1 5 240 386 344 82 355 279 238 M12 10P5
75/5 5 240 386 344 82 355 279 238 M12 10P5
75/1 5 240 386 344 82 355 279 238 M12 10P5
100/5 5 240 386 344 82 355 279 238 M12 10P5
100/1 5～7.5 240 386 344 82 355 279 238 M12 10P5
150/5 5 240 386 344 82 355 279 238 M12 10P10
150/5 10 240 386 344 82 355 279 238 M12 10P5
150/1 5 240 386 344 82 355 279 238 M12 10P10
150/1 10 240 386 344 82 355 279 238 M12 10P5
200/5 10～15 240 386 344 82 355 279 238 M12 10P5
200/1 5 240 386 344 82 355 279 238 M12 10P10
200/1 10 240 386 344 82 355 279 238 M12 10P5
300/5 15～20 240 386 344 82 355 279 238 M12 10P5
300/1 15 240 386 344 82 355 279 238 M12 10P5
600/1 15 240 386 344 82 355 279 238 M12 10P10
600/1 30 240 386 344 82 355 279 238 M12 10P5
MRD-LJK2
40
open
type
600/5 及
以上 20～30 240 386 344 82 355 279 238 M12 10P10
MRD-L Zero Sequence CT
75/5 15 120 300 268 81 270 217 179 M12 10P5
75/5 7.5 120 300 268 81 270 217 179 M12 10P10
100/5 20 120 300 268 81 270 217 179 M12 10P5
100/5 10 120 300 268 81 270 217 179 M12 10P10
150/5 30 120 300 268 81 270 217 179 M12 10P5
150/5 15 120 300 268 81 270 217 179 M12 10P10
200/5 40 120 300 268 81 270 217 179 M12 10P5
200/5 20 120 300 268 81 270 217 179 M12 10P10
300/5 15 120 300 268 81 270 217 179 M12 10P20
300/5 30 120 300 268 81 270 217 179 M12 10P10
50/1 5 120 300 268 81 270 217 179 M12 10P10
50/1 10 120 300 268 81 270 217 179 M12 10P5
75/1 15 120 300 268 81 270 217 179 M12 10P5
75/1 7.5 120 300 268 81 270 217 179 M12 10P10
100/1 10 120 300 268 81 270 217 179 M12 10P10
open
type
100/1 5 120 300 268 81 270 217 179 M12 10P20
(3) MRD-LXK/LXB, for the mounting size please refer to diagram 3,
MRD-LXB, for model selection, please refer to table 20
MRD-LXK, for model selection, please refer to table 21
Diagram 3 MRD-LXB/LXK mounting size
Table 20
Outline (mm)
Model No. Rated Ratio A
Rated
Ratio
VA φ L H D A h
bolt
preci
se
MRD-LXB60
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 60 160 145 57 90 80 M10 5
MRD-LXB80
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 80 175 163 57 105 95 M10 5
MRD-L Zero Sequence CT
Table 21
MRD-LXB100
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 100 205 198 56.5 125 115 M10 5
MRD-LXB120
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 120 220 208 56 140 118 M10 5
MRD-LXB160
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 160 308 300 82 220 165 M12 5
MRD-LXB180
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 180 308 300 82 220 165 M12 5
MRD-LXB200
integrated
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 200 308 300 82 220 165 M12 5
Outline(mm)
Model No. Rated Ratio A
Rated
Ratio
VA φ L H D A h
bolt
preci
se
MRD-LXK60
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 60 160 145 57 90 80 M10 5
MRD-LXK80
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 80 175 163 57 105 95 M10 5
MRD-LXK100
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 100 205 198 56.5 125 115 M10 5
MRD-LXK120
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 120 220 208 56 140 118 M10 5
MRD-LXK160
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 160 308 300 82 220 165 M12 5
MRD-LXK180
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 180 308 300 82 220 165 M12 5
MRD-LXK200
open type
40/1、50/1、75/1
100/1、150/1、
350/5
1～3 200 308 300 82 220 165 M12 5