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JDZ(X)9-35(G)
Model Meaning Breakdown (National Standard Naming Rule)
Position | Code | Meaning |
|---|---|---|
1 | J | Voltage Transformer (VT/PT) |
2 | D | Single-phase |
3 | Z | Cast Insulation (Vacuum-cast epoxy resin) |
4 | (X) | With residual voltage winding (for grounding protection); No X = standard metering type |
5 | 9 | Design Serial Number (represents product structure and performance iteration) |
6 | 35 | Rated Voltage Class (35kV, corresponding to maximum operating voltage 40.5kV) |
7 | (G) | Structure/Special Condition Code (usually stands for High-altitude type / Full-condition type / Reinforced insulation type, suitable for high-altitude and harsh environments) |
Core Technical Parameters (Industry General Standard)
Parameter Item | Typical Specification |
|---|---|
Rated Voltage Ratio | 35/√3 / 0.1/√3 / 0.1/3 (with residual winding); 35/0.1 (standard metering type) |
Rated Frequency | 50Hz (60Hz customizable) |
Accuracy Class Combination | 0.2/6P, 0.5/6P, 0.5/3P (Metering class / Protection class) |
Rated Output | 30VA/50VA/100VA/150VA/200VA (Metering winding); 30VA/100VA (Residual winding) |
Insulation Level | 40.5/95/200kV (Max. operating voltage / 1min power frequency withstand voltage / Lightning impulse withstand voltage) |
Ambient Temperature | -5℃ ~ +40℃ (G-type expandable to -40℃~+55℃, high-altitude adaptation) |
Altitude | ≤1000m (G-type customizable to ≤3000m for high-altitude areas) |
Applicable Standards | GB/T 20840.1/3, IEC 61869-1/3, GB 1207 |
Fully Enclosed Insulation Structure
Vacuum-cast with epoxy resin, oil-free, gas-free, and maintenance-free. It has excellent arc resistance, UV resistance, aging resistance, moisture and condensation resistance, and can be directly installed in switchgear without additional insulation protection.
Integral Post-type Design
Compact structure, high mechanical strength, and strong short-circuit resistance. It can withstand 1s external short-circuit without damage when excited at rated voltage, suitable for 35kV air-insulated switchgear, box-type substations, etc.
Flexible Multi-winding Configuration
Models with X (JDZX9-35G) integrate metering winding + protection winding + residual voltage winding, meeting the requirements of energy metering, relay protection, and system grounding monitoring (zero-sequence protection) simultaneously; models without X (JDZ9-35) are dual-winding, only for metering/protection.
Full-condition Adaptability
G-type products optimize insulation performance for harsh environments such as high altitude, high humidity, and pollution, meeting installation requirements in various scenarios.
35kV indoor high-voltage switchgear, ring main units, box-type substations
Power system energy metering, voltage monitoring, relay protection (overvoltage/undervoltage protection, grounding protection)
35kV booster stations in new energy power stations (photovoltaic/wind power), industrial power distribution systems, rail transit power supply systems
Winding Selection: For systems requiring grounding protection (such as neutral ungrounded/arc suppression coil grounded systems), JDZX9-35G with X must be selected; JDZ9-35 can be selected only for metering/protection.
Accuracy Class Matching: 0.2 class is preferred for metering, 6P/3P class for protection, to avoid excessive metering error caused by mixed use of classes.
Environmental Adaptation: G-type high-altitude products shall be selected for altitudes exceeding 1000m, and insulation margin shall be corrected according to altitude.
Safety Specification: The secondary side is strictly prohibited from short-circuiting, and must be reliably grounded during operation to prevent high voltage from entering the secondary circuit and causing safety accidents.
