Overview
Monitoring of the insulation resistance of DC charging stations according to the Japanese CHAdeMO charging standard
Detection of single-pole insulation faults in the DC mains voltage range between 50 V and 400 V within 1 s.
Detection of two-pole insulation faults within 10 s.
Measurement of the mains voltage (true r. m.s) with under/over voltage detection
Measurement of the DC voltages line to earth (L+/PE and L-/PE)
Automatic adaptation to the mains discharge capacity up to 2 μF
Start-up, on-delay and off-delay can be set
Two separately adjustable response value ranges of 5…250 kΩ (Alarm 1, Alarm 2)
Alarms are output via LEDs (AL1, AL2), a display and alarm relay (K1, K2)
Automatic device self-test with connection monitoring
Idle or working current behavior of the relays can be selected
Measured value display via multifunctional LC-display
Fault storage can be activated
RS-485 (galvanically isolated) with the following protocols:
– BMS
Description
The ISOMETER® is used for DC charging stations according to the Japanese CHAdeMO charging standard for voltages between 50 V DC and 400 V. Single-pole insulation faults are reported with a response time of ≤ 1 second. Two-pole insulation fault within 10 seconds. The maximum permissible mains leakage capacity CE is 2 μF. Individual parameterization means that adaptation to the plant and operating conditions must always be carried out on site in order to meet the requirements of the standards. Observe the limits of the application area specified in the technical data. Any other use or use beyond this is considered to be improper
DC charging stations for electric vehicles according to the Japanese charging standard CHAdeMO
The ISOMETER® measures the effective value (TrueRMS) of the mains voltage UN between L+ and Las well as the DC voltages between L+ and earth (UL+e) and between L- and earth (UL-e). It determines the fault location "R%", i.e. the distribution of the insulation resistance between the L+ and L- conductors from a minimum line DC voltage, and indicates this with a "+" or "-" sign for the insulation resistance value. The value range of the error location is ±100 %:
Display / meaning
-100 % / one-sided error at conductor L.
0 % / symmetrical error
+100 % / one-sided fault on conductor L+
The ISOMETER® uses the RS-485 serial hardware interface with the following protocols:
• BMS
The BMS protocol is an integral part of the BenderMeter interface (BMS bus protocol). Data is transferred using ASCII characters.
• Modbus RTU
Modbus RTU is an application layer messaging protocol that provides master/slave communication between devices that are connected together via bus systems and networks. Modbus RTU messages have a 16-bit CyclicRedundant Checksum (CRC) that ensures reliability.
• IsoData
The ISOMETER® continuously transmits an ASCII data string with a clock cycle of approx. 1 second. Communication with the ISOMETER® is not possible in this mode and no further transmitters may be connected to the RS-485 bus cable. The parameter address, baud rate, and parity for the interface protocols are configured in the out menu.
Keywords
02050006638798, Bender, B71036395, isoCHA425-D4-4, emobility, e mobility
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