Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards.Insulation level:12/42/75kV,frequency 50/60Hz,secondary current 5A or 1A.Optional primary current ranges:5-100A、150A、200-300A、400-600A、800-1200A、1500-2500A.Multiple accuracy combinations including 0.2S/0.5S and protection classes,with matched short-time thermal & dynamic withstand current for each range,suitable for metering and relay protection in medium-voltage switch cabinets.Ambient operating temperature:-5℃~+40℃,net weight 25kg.
Indoor epoxy-resin current transformer for 10kV systems, suitable for metering and protection in MV switchgear.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | GB/T 17201 |
| Model Code | LZZBJ9-12GY2 | Factory nameplate marking |
| Primary Voltage | 10kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | [On Request] | Ratio check at rated frequency |
| Accuracy Class | [On Request] | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | [On Request] | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | GB/T 17201 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
connect primary through the bushing; secondary terminals are 1S1/1S2 (protection winding 2S1-2S2). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal conventions.
Compliant with: GB/T 17201
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: What secondary currents are available?
A: Secondary current is 5A or 1A.
Q: What accuracy classes are offered?
A: Multiple accuracy combinations including 0.2S/0.5S and protection classes.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Rated primary current I1n (A) | Accuracy classCombined | 0.2(S)/0.5S | 0.5 | 5P10/10P10 | 5(10)P15/5(10)P20 | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 5-100 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 10 | 15 | 15 | 150 I1n | 375 I1n | 25 |
| 150 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 10 | 15 | 15 | 31.5 | 80 | 25 |
| 200-300 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 10 | 15 | 15 | 45 | 112.5 | 25 |
| 400-600 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 10 | 15 | 15 | 63 | 130 | 25 |
| 800-1200 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 20 | 20 | 15 | 100 | 160 | 25 |
| 1500-2500 | 0.2(S)/5(10)P 0.5(S)/5(10)P | 10 | 20 | 20 | 15 | 100 | 160 | 25 |
Dimension & outline drawing of LZZBJ9-12GY2 — click image to zoom / view original.
