Description
Overview
GAOTek DC ground fault detection Ungrounded Power Systems Off-line insulation monitoring devices are required in many occasions, such as fire pumps, emergency drives, ship cranes, supply lines (gas, water, oil) driven by slide valves, shut-off systems driven by motors, submersible pumps, anchor drives, elevators, smoke gas valves and backup generators, etc. KB600-D insulation monitor is a dedicated offline insulation monitoring instrument, which is used to monitor the ground insulation performance of offline equipment in IT or TT or TN systems in real time. When the ground insulation resistance of the monitored object is lower than the set value, it will output an alarm signal to control the motor start. Equipment design principal Insulation Monitor uses low-frequency AC injection method to reliably and accurately monitor the insulation resistance of the system to the ground. During operation, the insulation monitor continuously monitors the insulation resistance value of the entire system and triggers an alarm when the value is lower than the preset response value.
Features
- It is suitable for off-line monitoring of the ground insulation performance
- Built in test or button
- Automatic and manual reset function
- Multi-type, wide-range control power input
- Humanized and simple operation interface, which can display various parameters
- DIN rail installation
- LCD with backlight
- Measure and display the insulation resistance of ungrounded systems
- Measurement and display of leakage capacitance (C)
- Communication via Modbus RS-485
- Adjustable response delay
- Two independent alarm relays (each relay has a changeover contact)
- N or O or N or C operation, optional
Technical Specifications
| Rated Insulation Voltage | AC or DC 0 V to 690 V |
| Nominal System Voltage | Un AC or DC 0 V to 690 V |
| Nominal Frequency | fn DC, 50 Hz, 60 Hz |
| Alarm Value Ran1 (Alarm 1) | 1…9999 kΩ |
| Alarm Value Ran2 (Alarm 2) | 1…9999 kΩ |
| Relative Uncertainty | 1…5 kΩ: ±0.5 kΩ, 5…200 kΩ: ±15% |
| Response Time | when R=0.5 xR and G=1 μF tan ≤4 s |
| Start-up Delay (Start-up Time) | t 0…10 s (0 s) * |
| Response Delay | ton 0…99 s (0 s) * |
| Measuring Voltage | Um 50 V |
| DC Internal Resistance | Ri ≥ 120 kΩ |
| Impedance | Zi ≥ 120 kΩ at 50 Hz |
| Permissible System Leakage Cap. | Ce ≤ 20 μF |
| Display Range of Measured Values | 1 kΩ…20 MΩ |
| Display Type | Digital Only |
| Accuracy Class | ±0.5 kΩ/±15 % |
| Operating Temperature | -4 ℉ to 131 ℉ (-20 ℃ to 55 ℃) RH 95% (no condensation) |
| Dimensions | 3.937 in x 2.835 in x 2.598 in (100 mm x 72 mm x 66 mm) |