Indoor single-phase open-type current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 0.72/3kV, rated frequency 50Hz/60Hz, rated secondary current 5A or 1A, operating ambient temperature -5℃~+40℃, matched with 10kV ring main unit.
LMZK-10 is a 10kV indoor open-core current transformer for ring main units, offering accuracy 0.2/3P(6P) to 1.0/3P(6P) and rated burden up to 120VA. It suits protection and metering in indoor RMU applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LMZK-10 | Factory nameplate marking |
| Primary Voltage | 20kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | [On Request] | Ratio check at rated frequency |
| Accuracy Class | 0.2/3P(6P)、0.5/3P(6P)、1.0/3P(6P) | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | 20VA(0.2),75VA(0.5),120VA(1.0),100VA(3P) | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | 24/65/125kV | Power-frequency & lightning impulse withstand |
| Standards | [On Request] | Certified to listed standards |
| Frequency | 50Hz / 60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
connect primary through the open core; secondary terminals are 1S1/1S2 for metering, and 2S1/2S2 for protection if dual-winding. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal markings.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of LMZK-10?
A: The insulation level is 24/65/125kV: 24kV highest voltage for equipment, 65kV power-frequency withstand, 125kV lightning impulse withstand.
Q: Can LMZK-10 be used outdoors?
A: No, it is designed for indoor use. Outdoor use requires a weatherproof enclosure or special order.
Q: What are the available accuracy classes?
A: Accuracy classes include 0.2/3P(6P), 0.5/3P(6P), and 1.0/3P(6P), suitable for metering and protection.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Parameter | Value |
|---|---|
| Product performance complies with standards | GB/T20840.1, 2 and IEC61869-1, 2 |
| Rated insulation level | 7.2/30/75kV |
| Rated frequency | 50Hz or 60Hz |
| Rated secondary current | 5A or 1A |
| Ambient temperature | -5℃~+40℃ |
Dimension & outline drawing of LMZK-10 — click image to zoom / view original.
