| Customization: | Available |
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| Theory: | Electromagnetic Relay |
| Usage: | Car Relay, Household Appliances Relay, Communication Relay, Lathe Relay |
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The QB series insulation monitor uses low-frequency AC injection method to reliably and accurately monitor the system insulation resistance, system capacitance, bus voltage, positive and negative voltage to ground, positive and negative insulation resistance to ground, and positive and negative insulation resistance to ground of DC and IT systems (ungrounded systems). Parameters such as alarm event records can be remotely transmitted to the host computer through the 485 protocol. Different measurement conditions can be selected from the setup menu, allowing for the optimization of measurement technology for special applications.
During operation, the insulation monitor continuously monitors the insulation resistance of the entire IT system, and when the value is lower than the preset response value, an alarm is triggered. The device must be connected between the IT system (ungrounded system) and the PE line to obtain the measured value. The measured values in the uA range superimposed on the system are recorded and measured by a microcontroller.
| IT System for Compliance Monitoring | Rated Voltage of IT System (Operating Range) | DC 1150V (0 - 1150V) |
| Auxiliary Power Supply | Voltage | AC 85 - 265V (45 - 65Hz) DC 18 - 36V |
| Power Consumption | ≤ 6W | |
| Alarm Values | Alarm Value Ran1 (Alarm 1) | 1KΩ...10MΩ |
| Alarm Value Ran2 (Alarm 2) | 1KΩ...10MΩ | |
| Response Time | Response Time when RF = 0.5 x Ran and Ce = 1 μF | ≤ 4 s |
| Insulation Alarm Delay | 0...9999s | |
| Measurement Circuit of IT System | Measuring Voltage | ±60V |
| DC Internal Resistance R | ≥ 600kΩ | |
| Impedance Z at 50Hz | ≥ 600kΩ | |
| Allowable System Leakage Capacitance Ce | ≤ 500 μF | |
| Display Range of Measured Values | 1KΩ...10MΩ | |
| Measurement Error for 10KΩ - 20MΩ | ±15% | |
| Password | off/0...999 (off) | |
| Fault Record | 128 Entries | |
| Fault Memory, Alarm Relay | On/Off | |
| Measurement Filter Times | Filter Times 1 - 10 Adjustable | |
| Switch Input | 1 Dry Contact | Built - in DC15V Power Supply |
| Switch Output | 2 Relays | 1 Normally Open, 1 Normally Open and 1 Normally Closed |
| Communication Group 1 | RS485 1 | Communication Protocol: Modbus RTU Communication Rate: 2400 - 38400bps |
| Display Screen | LCD | Dot Matrix 128*64 |
| Wiring Capability | RS485 | Twisted - Pair Shielded Wire 0.2...2.5 mm² |
| Measurement Wiring | 0.2...2.5 mm² | |
| Mechanical Characteristics | Weight | 0.2KG |
| Protection Class | IP20 | |
| Overall Dimensions | 100×72×66mm | |
| Housing Material | PC + ABS | |
| Operating Environment | Operating Temperature | -20ºC - 55ºC |
| Storage Temperature | -30ºC - 70ºC | |
| Altitude | ≤ 2000m | |
| Withstand Voltage of Insulation | AC4000V |
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