Single-circuit ground fault direction relay with slight ground fault detection function for high voltage insulation condition monitoring system
Hikari Shoko Co., Ltd.
About This Product
This is a ground fault directional relay mainly used in the main circuit. Detects zero-sequence current and zero-sequence voltage. The detected zero-phase voltage signal can be supplied to LDG-84 etc. as an MN signal.
■Features
- A function for detecting slight ground faults has been added to conventional ground fault directional relays.
・Slight ground fault detection is performed at 30-40-50mA.
・If the ground fault voltage exceeds a certain level, it will function as a ground fault directional relay.
・Zero-phase capacitor (ZPC-9B) is compatible.
・Zero-phase current transformers are compatible with M41E to M120E and DM55E to DM100E.
- Has a measurement display function. Measures the current value and maximum value of zero-sequence current Io and zero-sequence voltage Vo.
- It has a self-diagnosis function and will issue an alarm if there is an abnormality.
・Measurement data and contact information can be transmitted by combining with CF-173.
・Can be used in combination with LDG-81/83 and LVG-8. It can also be combined with LDG-71/73 and LVG-7 (ground fault direction function only). It is easy to add to or update existing circuits.
- Ideal for monitoring the insulation condition of high voltage electrical circuits.
■Features
・A digital ground fault directional relay with a function to detect slight ground faults in high-voltage ungrounded electrical circuits.
- Detects 30-40-50mA for slight ground faults.
・You can check the current value and maximum value using the measurement display function.
- Self-diagnosis function automatically detects internal circuit abnormalities.
- Signal transmission device CF-173 is required for data transmission.
- Compliant with "JIS C 4609 Earth fault directional relay device for high voltage power receiving".
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Product
Single-circuit ground fault direction relay with slight ground fault detection function for high voltage insulation condition monitoring system
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Handling Company
Hikari Shoko Co., Ltd.
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Categories
1 Models of Single-circuit ground fault direction relay with slight ground fault detection function for high voltage insulation condition monitoring system
| Product Image | Part Number | Price (excluding tax) | Commercial frequency withstand voltage | Control power supply voltage | Earth fault monitoring section Sensitivity current setting value | Excessive ground fault resistance | Ground fault monitoring section Operating current tolerance | Ground fault monitoring section Sensitivity voltage setting value | Ground fault monitoring section operating time setting value | Ground fault monitoring section operating voltage tolerance | Ground fault monitoring unit operating phase tolerance | Insulation resistance | Mass | Measurement display | Micro-ground fault monitoring section Operating current tolerance | Micro-ground fault monitoring unit operating current setting value | Micro-ground fault monitoring unit operating time setting value | Micro-ground fault monitoring unit operating time tolerance | Monitoring line frequency | Number of connected devices | Operating time error 400% of the set current value | Operating time error: 130% of the set current value | Operation display Display method | Output contact closing capacity | Output contact configuration | Output contact return method | Output contact switching capacity | Power consumption Always | Power consumption during operation | Signal transmission | Test method | Working voltage range |
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LDG-85 |
Available upon quote |
Between the electric circuit and the outer box AC2,000V for 1 minute |
AC110V | 0.1-0.2-0.4-0.6-0.8 (A) | AC120A continuous | ±10% of setting current value | 2.5-5-7.5-10-15 (%) | 0.1-0.2-0.5-0.8-1.0 (s) | ±25% of the set voltage value |
Vo=150% of the setting voltage value, Io=1,000% of the setting current value (Leading) 145°±25° (Lagging) 35°±25° |
Between the electric circuit and the outer box 20MΩ or more with DC500V megger |
Approximately 1.2kg |
Vo voltage value: AC30~700V Io current value: AC3~999mA Abnormal display: Error display when monitoring abnormality occurs |
±10% of setting current value | 30-40-50 (mA) | 60s | 60s±10% when 130% of the current setting value flows | 50/60Hz (manual switching) | 30 units (LDG-84) |
Setting value 0.1s: 0.1 or less Setting value 0.2s: 0.1~0.2 Setting value 0.5s: 0.4~0.6 Setting value 0.8s: 0.7~0.9 Setting value 1.0s: 0.95~1.1 |
Setting value 0.1s: 0.1 or less Setting value 0.2s: 0.1~0.3 Setting value 0.5s: 0.4~0.65 Setting value 0.8s: 0.7~0.95 Setting value 1.0s: 0.95~1.15 |
Slight ground fault: Light emitting diode display (red) Automatic recovery method Ground fault: Magsign display (orange when operating) Manual return method Io, Vo display: Light emitting diode display (red) Automatic return method |
DC140V 5A 0.2s (L/R=7ms) |
Abnormality 1a, slight ground fault 1a, ground fault 2a *However, abnormality and slight ground fault are common. |
Automatic/manual switching method *However, automatic recovery method only in case of abnormality |
AC110V 5A, cosφ=1 2A, cosφ=0.4 DC100V 0.6A,L/R=1ms 0.2A,L/R=7ms |
3.6VA (at AC110V) | 4.8VA (at AC110V) | Measurement data can be transmitted using the signal transmission device CF-173. | Test/reset switch (combined), self-diagnosis method | AC90~AC120V |
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About Company Handling This Product
- Japan