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| Quantity: | |
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JDZ(X)11-15, 20(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 system grounding protection and zero-sequence protection; no X = standard metering/protection type) |
5 | 11 | Design Serial Number (represents product structure and performance iteration) |
6 | 15, 20 | Rated Voltage Class (kV) (15kV and 20kV voltage levels) |
7 | (G) | Structure/Special Condition Code (usually stands for High-altitude type / Full-condition type / Reinforced insulation type, suitable for harsh environments such as high altitude, high humidity and pollution) |
Core Technical Parameters (Full Specification)
Model | Rated Voltage Ratio (kV) | Accuracy Level Combination | Rated Output (VA) | Ultimate Output (VA) | Rated Insulation Level (kV) |
|---|---|---|---|---|---|
JDZ11-15 | 15/0.1 | 0.2, 0.5 | 30, 50 | 500 | 18/55/105 |
JDZ11-20 | 20/0.1 | 0.2, 0.5 | 30, 50 | 500 | 24/65/125 |
JDZX11-15G | 15/0.1/0.1 | 0.2/0.2, 0.5/0.5 | 20/20, 30/30 | 300 | 18/55/105 |
JDZX11-20G | 20/0.1/0.1 | 0.2/0.2, 0.5/0.5 | 20/20, 30/30 | 300 | 24/65/125 |
JDZX11-15G | 15/√3/0.1/√3/0.1/3 | 0.2/6P, 0.5/6P | 20/100, 50/100 | 400 | 18/55/105 |
JDZX11-20G | 20/√3/0.1/√3/0.1/3 | 0.2/6P, 0.5/6P | 20/100, 50/100 | 400 | 24/65/125 |
Insulation Level Format: Max. operating voltage / 1min power frequency withstand voltage / Lightning impulse withstand voltage
Winding Type: Dual-winding for metering/protection only; Three-winding with residual voltage winding for grounding protection.
Accuracy Class: 0.2/0.5 for metering, 6P for protection.
Fully Enclosed Epoxy Cast Structure: Oil-free, gas-free, maintenance-free, with excellent insulation, arc resistance, aging resistance and moisture resistance.
Compact Integrated Design: Small size, high mechanical strength, strong short-circuit resistance, saving installation space in switchgear.
Flexible Multi-winding Configuration: Dual/three-winding options to meet metering, protection and grounding monitoring requirements.
Full-condition Adaptability: G-type optimized for harsh environments such as high altitude, high temperature and pollution.
Standardized Installation and Wiring: Unified dimensions and wiring schemes, compatible with mainstream 15kV/20kV switchgear.
15kV/20kV indoor high-voltage switchgear, ring main units, box-type substations
Power system energy metering, voltage monitoring, relay protection
New energy power stations (photovoltaic/wind power), industrial power distribution, rail transit power supply
Distribution network automation and smart grid voltage monitoring
Winding Selection: Choose JDZX11-G with residual winding for ungrounded neutral systems; choose JDZ11 for line voltage metering only.
Accuracy Matching: Select 0.2 class for metering and 6P class for protection.
Environmental Adaptation: Select G-type for altitudes above 1000m.
Safety Specification: Strictly prohibit short-circuiting the secondary side, and reliably ground the secondary side during operation.
Wiring Specification: Follow the wiring diagram strictly, and connect the residual voltage winding to an open delta for grounding fault monitoring.
