Service conditon
·Rated Frequency: 50Hz ± 0.5Hz
·Ambient Temperature: -25°C to +55°C
·Altitude: ≤ 2000m
Construction & Features
·Voltage Transformer (PT):
Electromagnetic type, closed iron core, with primary winding connected in parallel to the high-voltage circuit. The secondary winding provides a reduced voltage (100V or 100/√3 V) for metering and monitoring.
·Current Transformer (CT):
Electromagnetic type, closed iron core, with primary winding connected in series to the high-voltage line. The secondary provides a reduced current (5A or 1A) for metering and relay protection. ·Integrated Design: The combination of PTs and CTs in one sealed epoxy resin-cast body ensures compact structure, high reliability, and ease of installation. ·Safety Notes: PT secondary must never be short-circuited; CT secondary must never be open-circuited.
Technical Parameters
·Standards Compliance: GB/T 20840.1-2010, GB20840.4-2015, IEC 61869.4:2013
Voltage Transformer (PT) Parameters
·Rated Voltage Ratio: 10/0.1 kV
·Rated Insulation Level: 12/42/75 kV
·Accuracy Class & Rated Output: 0.2 Class, 2 × 20 VA
·Max Output: 300 VA Current Transformer (CT) Parameters
·Rated Primary Current: 20A – 600A ·Rated Insulation Level: 12/42/75 kV
·Accuracy Class & Rated Output: 0.2S/15VA, 0.5S/15VA
·Short-Time Thermal Current: up to 31.5kA/4s
·Rated Dynamic Current: up to 80kA
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Model
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Voltage Transformer Section
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Current Transformer Section
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Rated Voltage Ratio (kV)
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Accuracy Class
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Rated Burden (VA)
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Rated Current Ratio (A)
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Accuracy Class
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Rated Burden (VA)
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JZZV1-20
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20 / 0.1
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0.5
0.2
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5
10
15
20
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20/5–1200/5
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0.5S
0.2S
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5
10
15
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20/1–1200/1
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2.5
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