Generally speaking, the meanings of the domestic current transformer model letters are as follows:
The first letter: l--current transformer Â
The second (or three) letters: a--through-wall type; m--busbar type; b--pillar type; insulation, c is porcelain insulation, s is plastic injection insulation; d--single-pass type; W--outdoor type; f--reverse type; g--modified type; y--low pressure type; z--casting insulation or pillar type; q--busbar type; k--plastic shell; j--casting Insulate or increase capacity.
Fourth (or five) letters: b--protection level; c--differential protection; d--d level; j--increase capacity; q--enhanced type. The letters after the hyphen: gh--use at high altitudes; th--use in hot and humid areas. Â
Example 1: Laj-10 type current transformer, the ratio is 400/5, the accuracy is 3.0, the capacity is 1.2ω, and the parameters are explained? Â
L-current transformer;
A-through wall;
J-ground protection or increase capacity;
10- for rated voltage 10kv;
400/5: When the primary current is 400a, the secondary current is 5a;
Level 3.0 is plus or minus 3.0% accuracy;
The capacity of 1.2ω refers to the total resistance of the equipment connected in series on the secondary side, which is actually 5a*5a*1.2ω=30va. Among them, 5a is the rated current of the secondary side.
Example 2: The lm2-0.66 current transformer is a “resin-cast current transformerâ€
L--current transformer Â
M--bus type
2--Design serial number
0.66--rated voltage is 0.6kv
As12/150b/2s type current transformer is "epoxy resin fully enclosed pillar current transformer"
Its domestic model is: lzzbj9-12 150b/2s
L—current transformer
Z-pillar
Z—casting insulation
b - with protection level
J—increase capacity
9—Design number
12—rated voltage (12kv)
150b—casting body width is 150mm
2s—thermal stable current time
As12/175b/2s type current transformer is also "epoxy fully enclosed pillar current transformer" Â
Its domestic model is: lzzbj9-12 175b/2s
The difference from the above is that its cast body width becomes 175mm
Lazbj-12 type current transformer is "through-wall fully enclosed current transformer"
L—current transformer
A-through wall
Z--casting insulation
b - with protection level
J—increase capacity
12—rated voltage (12kv)
Lmz-0.66 φ22~φ62 is a base-mounted circular current transformer with good insulation performance and moisture-proof performance. The secondary wire terminal is equipped with a plastic cover for lead sealing, which has strong anti-theft function. Mainly used for wires and cables.
The first letter: l--current transformer Â
The second (or three) letters: a--through-wall type; m--busbar type; b--pillar type; insulation, c is porcelain insulation, s is plastic injection insulation; d--single-pass type; W--outdoor type; f--reverse type; g--modified type; y--low pressure type; z--casting insulation or pillar type; q--busbar type; k--plastic shell; j--casting Insulate or increase capacity.
Fourth (or five) letters: b--protection level; c--differential protection; d--d level; j--increase capacity; q--enhanced type. The letters after the hyphen: gh--use at high altitudes; th--use in hot and humid areas. Â
Example 1: Laj-10 type current transformer, the ratio is 400/5, the accuracy is 3.0, the capacity is 1.2ω, and the parameters are explained? Â
L-current transformer;
A-through wall;
J-ground protection or increase capacity;
10- for rated voltage 10kv;
400/5: When the primary current is 400a, the secondary current is 5a;
Level 3.0 is plus or minus 3.0% accuracy;
The capacity of 1.2ω refers to the total resistance of the equipment connected in series on the secondary side, which is actually 5a*5a*1.2ω=30va. Among them, 5a is the rated current of the secondary side.
Example 2: The lm2-0.66 current transformer is a “resin-cast current transformerâ€
L--current transformer Â
M--bus type
2--Design serial number
0.66--rated voltage is 0.6kv
As12/150b/2s type current transformer is "epoxy resin fully enclosed pillar current transformer"
Its domestic model is: lzzbj9-12 150b/2s
L—current transformer
Z-pillar
Z—casting insulation
b - with protection level
J—increase capacity
9—Design number
12—rated voltage (12kv)
150b—casting body width is 150mm
2s—thermal stable current time
As12/175b/2s type current transformer is also "epoxy fully enclosed pillar current transformer" Â
Its domestic model is: lzzbj9-12 175b/2s
The difference from the above is that its cast body width becomes 175mm
Lazbj-12 type current transformer is "through-wall fully enclosed current transformer"
L—current transformer
A-through wall
Z--casting insulation
b - with protection level
J—increase capacity
12—rated voltage (12kv)
Lmz-0.66 φ22~φ62 is a base-mounted circular current transformer with good insulation performance and moisture-proof performance. The secondary wire terminal is equipped with a plastic cover for lead sealing, which has strong anti-theft function. Mainly used for wires and cables.
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