ZJS-102 DC System Insulation Monitoring for detecting DC leakage current with RS485 comm.
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ZJS-102 DC System Insulation Monitoring for detecting DC leakage current with RS485 comm.
Description
The DC system is the most important component of a high voltage industrial/utility substation. It supplies the energy to manage the protective devices and high voltage components and allows electrical faults to be safely isolated. Most high voltage substations house owns either a sealed or flooded cell battery bank.
Due to the complexity and dynamics of DC systems, DC ground faults caused by positive grounding or negative grounding are often difficult to be located. At the same time, due to the wide applications of intelligent relays and integrated automation systems, higher requirements are placed on the accuracy and safety of the DC system grounding monitoring device.
ZJS-102 DC System Insulation Monitor provides real-time online monitoring of insulation status of DC bus and branch circuit. It combined the balance bridge detection with unbalanced bridge detection two modes, to avoid the interference of distributed capacitance in the system, and also ZJS-102 can display the leakage current of each circuit in real time.
Features
l Real-time monitoring DC system voltage, pole to ground voltage and alarm
l Real-time monitoring system insulation and alarm
l Detection DC system distributed capacitance
l DC system branch circuit insulation detect and classification pre-warning
l DC system branch circuit leakage current detection and diagnosis
l Balance bridge and unbalanced bridge detection combined detecting insulation condition.
l Auto record of instantaneous grounding event and wave capture
l Support configuring battery bank as a special branch, and provide leakage locating for battery bank
l History recording and export to USB memory
l 5.0-inch touch screen display parameters and configuration
l Front panel with 6 individual alert LEDs
l Rear panel have 7 DO ports for important alarm info to PLC
l Singe device supports 240 branch circuit monitor
l Current sensors support hot-swapping and sensor failure detection
l Provide multiple devices in parallel mode to expand detect circuit quantities
l Subs slave device support hot-swapping and automatic identification
l RS485 and Ethernet (optional) communication port
Application
l DC speed regulating motor
l Solar power generation and other fields
l DC or AC/DC main circuits
l UPS systems, battery systems.
l IT systems with high leakage capacitances
l DC charging stations for electric vehicles.
Specification
Monitoring range of insulation resistance to ground | |
Earth alarm | 0~50K |
Pre-warning | 50~300K |
Working voltage range | |
Positive pole to ground | 0~300V |
Negative pole to ground | 0~300V |
System voltage | 0~300V |
AC injection voltage | 0~280V |
Busbar-II system voltage (DC cross detect) | 0~300V |
Battery bank insulation fault location error | ±1 cell |
Alarm history record | |
Record list quantities | 2000 lists |
Each record alarm list volume | ≤32 branches |
Real-time leakage current measurement | |
Screen display resolution | 0.01mA |
Current sensor range | 10mA, 20mA, 50mA, 100mA optional |
Each ZJS-102 port detect current volume | ≤240 branches |
Each ZJS-CU collector unit connected current sensor | ≤8 |
Instant event record | |
Capture sampling ratio | 1KHz, 500Hz, 250Hz, 125Hz configurable |
Record quantities | 2000 |
Waveforms for each instantaneous event | 8 |
Others | |
Passive digital output | 7 |
Fault alarm indicator | 6 |
Distributed capacitance range of the system | 0~200uF |
Voltage monitoring error | ≤0.5% |
Communication interface | RS485, Ethernet |
System vo0ltage balance compensation bridge | 40K, 60K, 120K |
Optional AUX | 220VAC |
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